<?php
/**
 * TemplatesApi
 * PHP version 7.4
 *
 * @category Class
 * @package  KlaviyoAPI
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 */

/**
 * Klaviyo API
 *
 * The Klaviyo REST API. Please visit https://developers.klaviyo.com for more details.
 *
 * Contact: developers@klaviyo.com
 * Generated by: https://openapi-generator.tech
 * OpenAPI Generator version: 6.1.0
 */

/**
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
 * https://openapi-generator.tech
 * Do not edit the class manually.
 */

namespace KlaviyoAPI\API;

use GuzzleHttp\Client;
use GuzzleHttp\ClientInterface;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Psr7\MultipartStream;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\RequestOptions;
use KlaviyoAPI\ApiException;
use KlaviyoAPI\Configuration;
use KlaviyoAPI\HeaderSelector;
use KlaviyoAPI\ObjectSerializer;

/**
 * TemplatesApi Class Doc Comment
 *
 * @category Class
 * @package  KlaviyoAPI
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 */
class TemplatesApi
{
    /**
     * @var ClientInterface
     */
    protected $client;

    /**
     * @var Configuration
     */
    protected $config;

    /**
     * @var HeaderSelector
     */
    protected $headerSelector;

    /**
     * @var int Host index
     */
    protected $hostIndex;

    /**
     * @param ClientInterface $client
     * @param Configuration   $config
     * @param HeaderSelector  $selector
     * @param int             $hostIndex (Optional) host index to select the list of hosts if defined in the OpenAPI spec
     */
    public function __construct(
        ClientInterface $client = null,
        Configuration $config = null,
        HeaderSelector $selector = null,
        $hostIndex = 0
    ) {
        $this->client = $client ?: new Client();
        $this->config = $config ?: new Configuration();
        $this->headerSelector = $selector ?: new HeaderSelector();
        $this->hostIndex = $hostIndex;
    }

    /**
     * Set the host index
     *
     * @param int $hostIndex Host index (required)
     */
    public function setHostIndex($hostIndex): void
    {
        $this->hostIndex = $hostIndex;
    }

    /**
     * Get the host index
     *
     * @return int Host index
     */
    public function getHostIndex()
    {
        return $this->hostIndex;
    }

    /**
     * @return Configuration
     */
    public function getConfig()
    {
        return $this->config;
    }

    /**
     * Operation cloneTemplate
     *
     * Clone Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCloneQuery $template_clone_query template_clone_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function cloneTemplate($template_clone_query, $apiKey = null)
    {
        list($response) = $this->cloneTemplateWithHttpInfo($template_clone_query, $apiKey);
        return $response;
    }

    /**
     * Alias of `cloneTemplate`
     *
     * @deprecated use `cloneTemplate` instead
     */
    public function createTemplateClone(...$args) {
        return $this->cloneTemplate(...$args);
    }

    /**
     * Operation cloneTemplateWithHttpInfo
     *
     * Clone Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCloneQuery $template_clone_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function cloneTemplateWithHttpInfo($template_clone_query, $apiKey = null)
    {
        $request = $this->cloneTemplateRequest($template_clone_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 201:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 201:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `cloneTemplateWithHttpInfo`
     *
     * @deprecated use `cloneTemplateWithHttpInfo` instead
     */
    public function createTemplateCloneWithHttpInfo(...$args) {
        return $this->cloneTemplateWithHttpInfo(...$args);
    }

    /**
     * Operation cloneTemplateAsync
     *
     * Clone Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCloneQuery $template_clone_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function cloneTemplateAsync($template_clone_query, $apiKey = null)
    {
        return $this->cloneTemplateAsyncWithHttpInfo($template_clone_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `cloneTemplateAsync`
     *
     * @deprecated use `cloneTemplateAsync` instead
     */
    public function createTemplateCloneAsync(...$args) {
        return $this->cloneTemplateAsync(...$args);
    }

    /**
     * Operation cloneTemplateAsyncWithHttpInfo
     *
     * Clone Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCloneQuery $template_clone_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function cloneTemplateAsyncWithHttpInfo($template_clone_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->cloneTemplateRequest($template_clone_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `cloneTemplateAsyncWithHttpInfo`
     *
     * @deprecated use `cloneTemplateAsyncWithHttpInfo` instead
     */
    public function createTemplateCloneAsyncWithHttpInfo(...$args) {
        return $this->cloneTemplateAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'cloneTemplate'
     *
     * @param  \KlaviyoAPI\Model\TemplateCloneQuery $template_clone_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function cloneTemplateRequest($template_clone_query, $apiKey = null)
    {
        // verify the required parameter 'template_clone_query' is set
        if ($template_clone_query === null || (is_array($template_clone_query) && count($template_clone_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $template_clone_query when calling cloneTemplate'
            );
        }

        $resourcePath = '/api/template-clone';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($template_clone_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($template_clone_query));
            } else {
                $httpBody = $template_clone_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'POST',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `cloneTemplateRequest`
     *
     * @deprecated use `cloneTemplateRequest` instead
     */
    public function createTemplateCloneRequest(...$args) {
        return $this->cloneTemplateRequest(...$args);
    }

    /**
     * Operation createTemplate
     *
     * Create Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCreateQuery $template_create_query template_create_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function createTemplate($template_create_query, $apiKey = null)
    {
        list($response) = $this->createTemplateWithHttpInfo($template_create_query, $apiKey);
        return $response;
    }

    /**
     * Operation createTemplateWithHttpInfo
     *
     * Create Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCreateQuery $template_create_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function createTemplateWithHttpInfo($template_create_query, $apiKey = null)
    {
        $request = $this->createTemplateRequest($template_create_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 201:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 201:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation createTemplateAsync
     *
     * Create Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCreateQuery $template_create_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function createTemplateAsync($template_create_query, $apiKey = null)
    {
        return $this->createTemplateAsyncWithHttpInfo($template_create_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation createTemplateAsyncWithHttpInfo
     *
     * Create Template
     *
     * @param  \KlaviyoAPI\Model\TemplateCreateQuery $template_create_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function createTemplateAsyncWithHttpInfo($template_create_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->createTemplateRequest($template_create_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'createTemplate'
     *
     * @param  \KlaviyoAPI\Model\TemplateCreateQuery $template_create_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function createTemplateRequest($template_create_query, $apiKey = null)
    {
        // verify the required parameter 'template_create_query' is set
        if ($template_create_query === null || (is_array($template_create_query) && count($template_create_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $template_create_query when calling createTemplate'
            );
        }

        $resourcePath = '/api/templates';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($template_create_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($template_create_query));
            } else {
                $httpBody = $template_create_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'POST',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation createUniversalContent
     *
     * Create Universal Content
     *
     * @param  \KlaviyoAPI\Model\UniversalContentCreateQuery $universal_content_create_query Create a template universal content (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function createUniversalContent($universal_content_create_query, $apiKey = null)
    {
        list($response) = $this->createUniversalContentWithHttpInfo($universal_content_create_query, $apiKey);
        return $response;
    }

    /**
     * Alias of `createUniversalContent`
     *
     * @deprecated use `createUniversalContent` instead
     */
    public function createTemplateUniversalContent(...$args) {
        return $this->createUniversalContent(...$args);
    }

    /**
     * Operation createUniversalContentWithHttpInfo
     *
     * Create Universal Content
     *
     * @param  \KlaviyoAPI\Model\UniversalContentCreateQuery $universal_content_create_query Create a template universal content (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function createUniversalContentWithHttpInfo($universal_content_create_query, $apiKey = null)
    {
        $request = $this->createUniversalContentRequest($universal_content_create_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 201:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 201:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `createUniversalContentWithHttpInfo`
     *
     * @deprecated use `createUniversalContentWithHttpInfo` instead
     */
    public function createTemplateUniversalContentWithHttpInfo(...$args) {
        return $this->createUniversalContentWithHttpInfo(...$args);
    }

    /**
     * Operation createUniversalContentAsync
     *
     * Create Universal Content
     *
     * @param  \KlaviyoAPI\Model\UniversalContentCreateQuery $universal_content_create_query Create a template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function createUniversalContentAsync($universal_content_create_query, $apiKey = null)
    {
        return $this->createUniversalContentAsyncWithHttpInfo($universal_content_create_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `createUniversalContentAsync`
     *
     * @deprecated use `createUniversalContentAsync` instead
     */
    public function createTemplateUniversalContentAsync(...$args) {
        return $this->createUniversalContentAsync(...$args);
    }

    /**
     * Operation createUniversalContentAsyncWithHttpInfo
     *
     * Create Universal Content
     *
     * @param  \KlaviyoAPI\Model\UniversalContentCreateQuery $universal_content_create_query Create a template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function createUniversalContentAsyncWithHttpInfo($universal_content_create_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->createUniversalContentRequest($universal_content_create_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `createUniversalContentAsyncWithHttpInfo`
     *
     * @deprecated use `createUniversalContentAsyncWithHttpInfo` instead
     */
    public function createTemplateUniversalContentAsyncWithHttpInfo(...$args) {
        return $this->createUniversalContentAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'createUniversalContent'
     *
     * @param  \KlaviyoAPI\Model\UniversalContentCreateQuery $universal_content_create_query Create a template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function createUniversalContentRequest($universal_content_create_query, $apiKey = null)
    {
        // verify the required parameter 'universal_content_create_query' is set
        if ($universal_content_create_query === null || (is_array($universal_content_create_query) && count($universal_content_create_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $universal_content_create_query when calling createUniversalContent'
            );
        }

        $resourcePath = '/api/template-universal-content';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($universal_content_create_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($universal_content_create_query));
            } else {
                $httpBody = $universal_content_create_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'POST',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `createUniversalContentRequest`
     *
     * @deprecated use `createUniversalContentRequest` instead
     */
    public function createTemplateUniversalContentRequest(...$args) {
        return $this->createUniversalContentRequest(...$args);
    }

    /**
     * Operation deleteTemplate
     *
     * Delete Template
     *
     * @param  string $id The ID of template (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return void
     */
    public function deleteTemplate($id, $apiKey = null)
    {
        $this->deleteTemplateWithHttpInfo($id, $apiKey);
    }

    /**
     * Operation deleteTemplateWithHttpInfo
     *
     * Delete Template
     *
     * @param  string $id The ID of template (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of null, HTTP status code, HTTP response headers (array of strings)
     */
    public function deleteTemplateWithHttpInfo($id, $apiKey = null)
    {
        $request = $this->deleteTemplateRequest($id, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            return [null, $statusCode, $response->getHeaders()];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation deleteTemplateAsync
     *
     * Delete Template
     *
     * @param  string $id The ID of template (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function deleteTemplateAsync($id, $apiKey = null)
    {
        return $this->deleteTemplateAsyncWithHttpInfo($id, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation deleteTemplateAsyncWithHttpInfo
     *
     * Delete Template
     *
     * @param  string $id The ID of template (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function deleteTemplateAsyncWithHttpInfo($id, $apiKey = null)
    {
        $returnType = '';
        $request = $this->deleteTemplateRequest($id, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    return [null, $response->getStatusCode(), $response->getHeaders()];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'deleteTemplate'
     *
     * @param  string $id The ID of template (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function deleteTemplateRequest($id, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling deleteTemplate'
            );
        }

        $resourcePath = '/api/templates/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'DELETE',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation deleteUniversalContent
     *
     * Delete Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return void
     */
    public function deleteUniversalContent($id, $apiKey = null)
    {
        $this->deleteUniversalContentWithHttpInfo($id, $apiKey);
    }

    /**
     * Alias of `deleteUniversalContent`
     *
     * @deprecated use `deleteUniversalContent` instead
     */
    public function deleteTemplateUniversalContent(...$args) {
        return $this->deleteUniversalContent(...$args);
    }

    /**
     * Operation deleteUniversalContentWithHttpInfo
     *
     * Delete Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of null, HTTP status code, HTTP response headers (array of strings)
     */
    public function deleteUniversalContentWithHttpInfo($id, $apiKey = null)
    {
        $request = $this->deleteUniversalContentRequest($id, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            return [null, $statusCode, $response->getHeaders()];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `deleteUniversalContentWithHttpInfo`
     *
     * @deprecated use `deleteUniversalContentWithHttpInfo` instead
     */
    public function deleteTemplateUniversalContentWithHttpInfo(...$args) {
        return $this->deleteUniversalContentWithHttpInfo(...$args);
    }

    /**
     * Operation deleteUniversalContentAsync
     *
     * Delete Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function deleteUniversalContentAsync($id, $apiKey = null)
    {
        return $this->deleteUniversalContentAsyncWithHttpInfo($id, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `deleteUniversalContentAsync`
     *
     * @deprecated use `deleteUniversalContentAsync` instead
     */
    public function deleteTemplateUniversalContentAsync(...$args) {
        return $this->deleteUniversalContentAsync(...$args);
    }

    /**
     * Operation deleteUniversalContentAsyncWithHttpInfo
     *
     * Delete Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function deleteUniversalContentAsyncWithHttpInfo($id, $apiKey = null)
    {
        $returnType = '';
        $request = $this->deleteUniversalContentRequest($id, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    return [null, $response->getStatusCode(), $response->getHeaders()];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `deleteUniversalContentAsyncWithHttpInfo`
     *
     * @deprecated use `deleteUniversalContentAsyncWithHttpInfo` instead
     */
    public function deleteTemplateUniversalContentAsyncWithHttpInfo(...$args) {
        return $this->deleteUniversalContentAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'deleteUniversalContent'
     *
     * @param  string $id The ID of the template universal content (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function deleteUniversalContentRequest($id, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling deleteUniversalContent'
            );
        }

        $resourcePath = '/api/template-universal-content/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'DELETE',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `deleteUniversalContentRequest`
     *
     * @deprecated use `deleteUniversalContentRequest` instead
     */
    public function deleteTemplateUniversalContentRequest(...$args) {
        return $this->deleteUniversalContentRequest(...$args);
    }

    /**
     * Operation getAllUniversalContent
     *
     * Get All Universal Content
     *
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;definition.content_type&#x60;: &#x60;equals&#x60;&lt;br&gt;&#x60;definition.type&#x60;: &#x60;equals&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  int $page_size Default: 20. Min: 1. Max: 100. (optional, default to 20)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function getAllUniversalContent($fields_template_universal_content = null, $filter = null, $page_cursor = null, $page_size = 20, $sort = null, $apiKey = null)
    {
        list($response) = $this->getAllUniversalContentWithHttpInfo($fields_template_universal_content, $filter, $page_cursor, $page_size, $sort, $apiKey);
        return $response;
    }

    /**
     * Alias of `getAllUniversalContent`
     *
     * @deprecated use `getAllUniversalContent` instead
     */
    public function getTemplateUniversalContent(...$args) {
        return $this->getAllUniversalContent(...$args);
    }

    /**
     * Operation getAllUniversalContentWithHttpInfo
     *
     * Get All Universal Content
     *
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;definition.content_type&#x60;: &#x60;equals&#x60;&lt;br&gt;&#x60;definition.type&#x60;: &#x60;equals&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  int $page_size Default: 20. Min: 1. Max: 100. (optional, default to 20)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function getAllUniversalContentWithHttpInfo($fields_template_universal_content = null, $filter = null, $page_cursor = null, $page_size = 20, $sort = null, $apiKey = null)
    {
        $request = $this->getAllUniversalContentRequest($fields_template_universal_content, $filter, $page_cursor, $page_size, $sort, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `getAllUniversalContentWithHttpInfo`
     *
     * @deprecated use `getAllUniversalContentWithHttpInfo` instead
     */
    public function getTemplateUniversalContentWithHttpInfo(...$args) {
        return $this->getAllUniversalContentWithHttpInfo(...$args);
    }

    /**
     * Operation getAllUniversalContentAsync
     *
     * Get All Universal Content
     *
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;definition.content_type&#x60;: &#x60;equals&#x60;&lt;br&gt;&#x60;definition.type&#x60;: &#x60;equals&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  int $page_size Default: 20. Min: 1. Max: 100. (optional, default to 20)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getAllUniversalContentAsync($fields_template_universal_content = null, $filter = null, $page_cursor = null, $page_size = 20, $sort = null, $apiKey = null)
    {
        return $this->getAllUniversalContentAsyncWithHttpInfo($fields_template_universal_content, $filter, $page_cursor, $page_size, $sort, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `getAllUniversalContentAsync`
     *
     * @deprecated use `getAllUniversalContentAsync` instead
     */
    public function getTemplateUniversalContentAsync(...$args) {
        return $this->getAllUniversalContentAsync(...$args);
    }

    /**
     * Operation getAllUniversalContentAsyncWithHttpInfo
     *
     * Get All Universal Content
     *
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;definition.content_type&#x60;: &#x60;equals&#x60;&lt;br&gt;&#x60;definition.type&#x60;: &#x60;equals&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  int $page_size Default: 20. Min: 1. Max: 100. (optional, default to 20)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getAllUniversalContentAsyncWithHttpInfo($fields_template_universal_content = null, $filter = null, $page_cursor = null, $page_size = 20, $sort = null, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->getAllUniversalContentRequest($fields_template_universal_content, $filter, $page_cursor, $page_size, $sort, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `getAllUniversalContentAsyncWithHttpInfo`
     *
     * @deprecated use `getAllUniversalContentAsyncWithHttpInfo` instead
     */
    public function getTemplateUniversalContentAsyncWithHttpInfo(...$args) {
        return $this->getAllUniversalContentAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'getAllUniversalContent'
     *
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;definition.content_type&#x60;: &#x60;equals&#x60;&lt;br&gt;&#x60;definition.type&#x60;: &#x60;equals&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  int $page_size Default: 20. Min: 1. Max: 100. (optional, default to 20)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getAllUniversalContentRequest($fields_template_universal_content = null, $filter = null, $page_cursor = null, $page_size = 20, $sort = null, $apiKey = null)
    {
        if ($page_size !== null && $page_size > 100) {
            throw new \InvalidArgumentException('invalid value for "$page_size" when calling TemplatesApi.getAllUniversalContent, must be smaller than or equal to 100.');
        }
        if ($page_size !== null && $page_size < 1) {
            throw new \InvalidArgumentException('invalid value for "$page_size" when calling TemplatesApi.getAllUniversalContent, must be bigger than or equal to 1.');
        }


        $resourcePath = '/api/template-universal-content';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $fields_template_universal_content,
            'fields[template-universal-content]', // param base name
            'array', // openApiType
            'form', // style
            false, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $filter,
            'filter', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $page_cursor,
            'page[cursor]', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $page_size,
            'page[size]', // param base name
            'integer', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $sort,
            'sort', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `getAllUniversalContentRequest`
     *
     * @deprecated use `getAllUniversalContentRequest` instead
     */
    public function getTemplateUniversalContentRequest(...$args) {
        return $this->getAllUniversalContentRequest(...$args);
    }

    /**
     * Operation getTemplate
     *
     * Get Template
     *
     * @param  string $id The ID of template (required)
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function getTemplate($id, $fields_template = null, $apiKey = null)
    {
        list($response) = $this->getTemplateWithHttpInfo($id, $fields_template, $apiKey);
        return $response;
    }

    /**
     * Operation getTemplateWithHttpInfo
     *
     * Get Template
     *
     * @param  string $id The ID of template (required)
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function getTemplateWithHttpInfo($id, $fields_template = null, $apiKey = null)
    {
        $request = $this->getTemplateRequest($id, $fields_template, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation getTemplateAsync
     *
     * Get Template
     *
     * @param  string $id The ID of template (required)
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getTemplateAsync($id, $fields_template = null, $apiKey = null)
    {
        return $this->getTemplateAsyncWithHttpInfo($id, $fields_template, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation getTemplateAsyncWithHttpInfo
     *
     * Get Template
     *
     * @param  string $id The ID of template (required)
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getTemplateAsyncWithHttpInfo($id, $fields_template = null, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->getTemplateRequest($id, $fields_template, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'getTemplate'
     *
     * @param  string $id The ID of template (required)
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getTemplateRequest($id, $fields_template = null, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling getTemplate'
            );
        }

        $resourcePath = '/api/templates/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $fields_template,
            'fields[template]', // param base name
            'array', // openApiType
            'form', // style
            false, // explode
            false // required
        ) ?? []);


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation getTemplates
     *
     * Get Templates
     *
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function getTemplates($fields_template = null, $filter = null, $page_cursor = null, $sort = null, $apiKey = null)
    {
        list($response) = $this->getTemplatesWithHttpInfo($fields_template, $filter, $page_cursor, $sort, $apiKey);
        return $response;
    }

    /**
     * Operation getTemplatesWithHttpInfo
     *
     * Get Templates
     *
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function getTemplatesWithHttpInfo($fields_template = null, $filter = null, $page_cursor = null, $sort = null, $apiKey = null)
    {
        $request = $this->getTemplatesRequest($fields_template, $filter, $page_cursor, $sort, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation getTemplatesAsync
     *
     * Get Templates
     *
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getTemplatesAsync($fields_template = null, $filter = null, $page_cursor = null, $sort = null, $apiKey = null)
    {
        return $this->getTemplatesAsyncWithHttpInfo($fields_template, $filter, $page_cursor, $sort, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation getTemplatesAsyncWithHttpInfo
     *
     * Get Templates
     *
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getTemplatesAsyncWithHttpInfo($fields_template = null, $filter = null, $page_cursor = null, $sort = null, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->getTemplatesRequest($fields_template, $filter, $page_cursor, $sort, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'getTemplates'
     *
     * @param  string[] $fields_template For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     * @param  string $filter For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#filtering&lt;br&gt;Allowed field(s)/operator(s):&lt;br&gt;&#x60;id&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;name&#x60;: &#x60;any&#x60;, &#x60;equals&#x60;&lt;br&gt;&#x60;created&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60;&lt;br&gt;&#x60;updated&#x60;: &#x60;equals&#x60;, &#x60;greater-or-equal&#x60;, &#x60;greater-than&#x60;, &#x60;less-or-equal&#x60;, &#x60;less-than&#x60; (optional)
     * @param  string $page_cursor For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#pagination (optional)
     * @param  string $sort For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sorting (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getTemplatesRequest($fields_template = null, $filter = null, $page_cursor = null, $sort = null, $apiKey = null)
    {

        $resourcePath = '/api/templates';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $fields_template,
            'fields[template]', // param base name
            'array', // openApiType
            'form', // style
            false, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $filter,
            'filter', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $page_cursor,
            'page[cursor]', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);
        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $sort,
            'sort', // param base name
            'string', // openApiType
            'form', // style
            true, // explode
            false // required
        ) ?? []);


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation getUniversalContent
     *
     * Get Universal Content
     *
     * @param  string $id The ID of the universal content (required)
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function getUniversalContent($id, $fields_template_universal_content = null, $apiKey = null)
    {
        list($response) = $this->getUniversalContentWithHttpInfo($id, $fields_template_universal_content, $apiKey);
        return $response;
    }

    /**
     * Operation getUniversalContentWithHttpInfo
     *
     * Get Universal Content
     *
     * @param  string $id The ID of the universal content (required)
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function getUniversalContentWithHttpInfo($id, $fields_template_universal_content = null, $apiKey = null)
    {
        $request = $this->getUniversalContentRequest($id, $fields_template_universal_content, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation getUniversalContentAsync
     *
     * Get Universal Content
     *
     * @param  string $id The ID of the universal content (required)
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getUniversalContentAsync($id, $fields_template_universal_content = null, $apiKey = null)
    {
        return $this->getUniversalContentAsyncWithHttpInfo($id, $fields_template_universal_content, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation getUniversalContentAsyncWithHttpInfo
     *
     * Get Universal Content
     *
     * @param  string $id The ID of the universal content (required)
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getUniversalContentAsyncWithHttpInfo($id, $fields_template_universal_content = null, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->getUniversalContentRequest($id, $fields_template_universal_content, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'getUniversalContent'
     *
     * @param  string $id The ID of the universal content (required)
     * @param  string[] $fields_template_universal_content For more information please visit https://developers.klaviyo.com/en/v2025-07-15/reference/api-overview#sparse-fieldsets (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getUniversalContentRequest($id, $fields_template_universal_content = null, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling getUniversalContent'
            );
        }

        $resourcePath = '/api/template-universal-content/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
            $fields_template_universal_content,
            'fields[template-universal-content]', // param base name
            'array', // openApiType
            'form', // style
            false, // explode
            false // required
        ) ?? []);


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation renderTemplate
     *
     * Render Template
     *
     * @param  \KlaviyoAPI\Model\TemplateRenderQuery $template_render_query template_render_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function renderTemplate($template_render_query, $apiKey = null)
    {
        list($response) = $this->renderTemplateWithHttpInfo($template_render_query, $apiKey);
        return $response;
    }

    /**
     * Alias of `renderTemplate`
     *
     * @deprecated use `renderTemplate` instead
     */
    public function createTemplateRender(...$args) {
        return $this->renderTemplate(...$args);
    }

    /**
     * Operation renderTemplateWithHttpInfo
     *
     * Render Template
     *
     * @param  \KlaviyoAPI\Model\TemplateRenderQuery $template_render_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function renderTemplateWithHttpInfo($template_render_query, $apiKey = null)
    {
        $request = $this->renderTemplateRequest($template_render_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 201:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 201:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `renderTemplateWithHttpInfo`
     *
     * @deprecated use `renderTemplateWithHttpInfo` instead
     */
    public function createTemplateRenderWithHttpInfo(...$args) {
        return $this->renderTemplateWithHttpInfo(...$args);
    }

    /**
     * Operation renderTemplateAsync
     *
     * Render Template
     *
     * @param  \KlaviyoAPI\Model\TemplateRenderQuery $template_render_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function renderTemplateAsync($template_render_query, $apiKey = null)
    {
        return $this->renderTemplateAsyncWithHttpInfo($template_render_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `renderTemplateAsync`
     *
     * @deprecated use `renderTemplateAsync` instead
     */
    public function createTemplateRenderAsync(...$args) {
        return $this->renderTemplateAsync(...$args);
    }

    /**
     * Operation renderTemplateAsyncWithHttpInfo
     *
     * Render Template
     *
     * @param  \KlaviyoAPI\Model\TemplateRenderQuery $template_render_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function renderTemplateAsyncWithHttpInfo($template_render_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->renderTemplateRequest($template_render_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `renderTemplateAsyncWithHttpInfo`
     *
     * @deprecated use `renderTemplateAsyncWithHttpInfo` instead
     */
    public function createTemplateRenderAsyncWithHttpInfo(...$args) {
        return $this->renderTemplateAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'renderTemplate'
     *
     * @param  \KlaviyoAPI\Model\TemplateRenderQuery $template_render_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function renderTemplateRequest($template_render_query, $apiKey = null)
    {
        // verify the required parameter 'template_render_query' is set
        if ($template_render_query === null || (is_array($template_render_query) && count($template_render_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $template_render_query when calling renderTemplate'
            );
        }

        $resourcePath = '/api/template-render';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($template_render_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($template_render_query));
            } else {
                $httpBody = $template_render_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'POST',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `renderTemplateRequest`
     *
     * @deprecated use `renderTemplateRequest` instead
     */
    public function createTemplateRenderRequest(...$args) {
        return $this->renderTemplateRequest(...$args);
    }

    /**
     * Operation updateTemplate
     *
     * Update Template
     *
     * @param  string $id The ID of template (required)
     * @param  \KlaviyoAPI\Model\TemplateUpdateQuery $template_update_query template_update_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function updateTemplate($id, $template_update_query, $apiKey = null)
    {
        list($response) = $this->updateTemplateWithHttpInfo($id, $template_update_query, $apiKey);
        return $response;
    }

    /**
     * Operation updateTemplateWithHttpInfo
     *
     * Update Template
     *
     * @param  string $id The ID of template (required)
     * @param  \KlaviyoAPI\Model\TemplateUpdateQuery $template_update_query (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function updateTemplateWithHttpInfo($id, $template_update_query, $apiKey = null)
    {
        $request = $this->updateTemplateRequest($id, $template_update_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation updateTemplateAsync
     *
     * Update Template
     *
     * @param  string $id The ID of template (required)
     * @param  \KlaviyoAPI\Model\TemplateUpdateQuery $template_update_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function updateTemplateAsync($id, $template_update_query, $apiKey = null)
    {
        return $this->updateTemplateAsyncWithHttpInfo($id, $template_update_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation updateTemplateAsyncWithHttpInfo
     *
     * Update Template
     *
     * @param  string $id The ID of template (required)
     * @param  \KlaviyoAPI\Model\TemplateUpdateQuery $template_update_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function updateTemplateAsyncWithHttpInfo($id, $template_update_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->updateTemplateRequest($id, $template_update_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Create request for operation 'updateTemplate'
     *
     * @param  string $id The ID of template (required)
     * @param  \KlaviyoAPI\Model\TemplateUpdateQuery $template_update_query (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function updateTemplateRequest($id, $template_update_query, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling updateTemplate'
            );
        }
        // verify the required parameter 'template_update_query' is set
        if ($template_update_query === null || (is_array($template_update_query) && count($template_update_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $template_update_query when calling updateTemplate'
            );
        }

        $resourcePath = '/api/templates/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($template_update_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($template_update_query));
            } else {
                $httpBody = $template_update_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'PATCH',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation updateUniversalContent
     *
     * Update Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     * @param  \KlaviyoAPI\Model\UniversalContentPartialUpdateQuery $universal_content_partial_update_query Update a universal content by ID (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response
     */
    public function updateUniversalContent($id, $universal_content_partial_update_query, $apiKey = null)
    {
        list($response) = $this->updateUniversalContentWithHttpInfo($id, $universal_content_partial_update_query, $apiKey);
        return $response;
    }

    /**
     * Alias of `updateUniversalContent`
     *
     * @deprecated use `updateUniversalContent` instead
     */
    public function updateTemplateUniversalContent(...$args) {
        return $this->updateUniversalContent(...$args);
    }

    /**
     * Operation updateUniversalContentWithHttpInfo
     *
     * Update Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     * @param  \KlaviyoAPI\Model\UniversalContentPartialUpdateQuery $universal_content_partial_update_query Update a universal content by ID (required)
     *
     * @throws \KlaviyoAPI\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of array<string,mixed>|\KlaviyoAPI\Model\GetAccounts400Response|\KlaviyoAPI\Model\GetAccounts400Response, HTTP status code, HTTP response headers (array of strings)
     */
    public function updateUniversalContentWithHttpInfo($id, $universal_content_partial_update_query, $apiKey = null)
    {
        $request = $this->updateUniversalContentRequest($id, $universal_content_partial_update_query, $apiKey);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
                );
            } catch (ConnectException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    (int) $e->getCode(),
                    null,
                    null
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        (string) $request->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    (string) $response->getBody()
                );
            }

            switch($statusCode) {
                case 200:
                    if ('array<string,mixed>' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('array&lt;string,mixed&gt;' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 400:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                case 500:
                    if ('\KlaviyoAPI\Model\GetAccounts400Response' === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ('\KlaviyoAPI\Model\GetAccounts400Response' !== 'string') {
                            $content = json_decode($content);
                        }
                    }


                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
            }

            $returnType = 'array<string,mixed>';
            if ($returnType === '\SplFileObject') {
                $content = $response->getBody(); //stream goes to serializer
            } else {
                $content = (string) $response->getBody();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

            $parsed_content = json_decode(json_encode($content), TRUE);
            if (json_last_error() != JSON_ERROR_NONE) {
                $parsed_content = $content;
            }

            return [
                $parsed_content,
                $response->getStatusCode(),
                $response->getHeaders()
            ];

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'array<string,mixed>',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\KlaviyoAPI\Model\GetAccounts400Response',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Alias of `updateUniversalContentWithHttpInfo`
     *
     * @deprecated use `updateUniversalContentWithHttpInfo` instead
     */
    public function updateTemplateUniversalContentWithHttpInfo(...$args) {
        return $this->updateUniversalContentWithHttpInfo(...$args);
    }

    /**
     * Operation updateUniversalContentAsync
     *
     * Update Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     * @param  \KlaviyoAPI\Model\UniversalContentPartialUpdateQuery $universal_content_partial_update_query Update a universal content by ID (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function updateUniversalContentAsync($id, $universal_content_partial_update_query, $apiKey = null)
    {
        return $this->updateUniversalContentAsyncWithHttpInfo($id, $universal_content_partial_update_query, $apiKey)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Alias of `updateUniversalContentAsync`
     *
     * @deprecated use `updateUniversalContentAsync` instead
     */
    public function updateTemplateUniversalContentAsync(...$args) {
        return $this->updateUniversalContentAsync(...$args);
    }

    /**
     * Operation updateUniversalContentAsyncWithHttpInfo
     *
     * Update Universal Content
     *
     * @param  string $id The ID of the template universal content (required)
     * @param  \KlaviyoAPI\Model\UniversalContentPartialUpdateQuery $universal_content_partial_update_query Update a universal content by ID (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function updateUniversalContentAsyncWithHttpInfo($id, $universal_content_partial_update_query, $apiKey = null)
    {
        $returnType = 'array<string,mixed>';
        $request = $this->updateUniversalContentRequest($id, $universal_content_partial_update_query, $apiKey);

        return $this->client
            ->sendAsync($request, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    if ($returnType === '\SplFileObject') {
                        $content = $response->getBody(); //stream goes to serializer
                    } else {
                        $content = (string) $response->getBody();
                        if ($returnType !== 'string') {
                            $content = json_decode($content);
                        }
                    }

                    $parsed_content = json_decode(json_encode($content), TRUE);
                    if (json_last_error() != JSON_ERROR_NONE) {
                        $parsed_content = $content;
                    }

                    return [
                        $parsed_content,
                        $response->getStatusCode(),
                        $response->getHeaders()
                    ];
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $statusCode = $response->getStatusCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $response->getHeaders(),
                        (string) $response->getBody()
                    );
                }
            );
    }

    /**
     * Alias of `updateUniversalContentAsyncWithHttpInfo`
     *
     * @deprecated use `updateUniversalContentAsyncWithHttpInfo` instead
     */
    public function updateTemplateUniversalContentAsyncWithHttpInfo(...$args) {
        return $this->updateUniversalContentAsyncWithHttpInfo(...$args);
    }

    /**
     * Create request for operation 'updateUniversalContent'
     *
     * @param  string $id The ID of the template universal content (required)
     * @param  \KlaviyoAPI\Model\UniversalContentPartialUpdateQuery $universal_content_partial_update_query Update a universal content by ID (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function updateUniversalContentRequest($id, $universal_content_partial_update_query, $apiKey = null)
    {
        // verify the required parameter 'id' is set
        if ($id === null || (is_array($id) && count($id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $id when calling updateUniversalContent'
            );
        }
        // verify the required parameter 'universal_content_partial_update_query' is set
        if ($universal_content_partial_update_query === null || (is_array($universal_content_partial_update_query) && count($universal_content_partial_update_query) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $universal_content_partial_update_query when calling updateUniversalContent'
            );
        }

        $resourcePath = '/api/template-universal-content/{id}';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;


        // path params
        if ($id !== null) {
            $resourcePath = str_replace(
                '{' . 'id' . '}',
                ObjectSerializer::toPathValue($id),
                $resourcePath
            );
        }


        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/vnd.api+json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/vnd.api+json'],
                ['application/vnd.api+json']
            );
        }

        // for model (json/xml)
        if (isset($universal_content_partial_update_query)) {
            if ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($universal_content_partial_update_query));
            } else {
                $httpBody = $universal_content_partial_update_query;
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json' || $headers['Content-Type'] === 'application/vnd.api+json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = ObjectSerializer::buildQuery($formParams);
            }
        }

        // this endpoint requires API key authentication
        if ($apiKey == null) {
            $apiKey = $this->config->getApiKeyWithPrefix('Authorization');
        } else {
            $apiKey = 'Klaviyo-API-Key '.$apiKey;
        }

        $headers['Authorization'] = $apiKey;


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $defaultHeaders['revision'] = ['2025-07-15'];

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = ObjectSerializer::buildQuery($queryParams);
        return new Request(
            'PATCH',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Alias of `updateUniversalContentRequest`
     *
     * @deprecated use `updateUniversalContentRequest` instead
     */
    public function updateTemplateUniversalContentRequest(...$args) {
        return $this->updateUniversalContentRequest(...$args);
    }

    /**
     * Create http client option
     *
     * @throws \RuntimeException on file opening failure
     * @return array of http client options
     */
    protected function createHttpClientOption()
    {
        $options = [];
        if ($this->config->getDebug()) {
            $options[RequestOptions::DEBUG] = fopen($this->config->getDebugFile(), 'a');
            if (!$options[RequestOptions::DEBUG]) {
                throw new \RuntimeException('Failed to open the debug file: ' . $this->config->getDebugFile());
            }
        }

        return $options;
    }
}