<?php

namespace Drupal\Console\Core\Utils;

use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Finder\Finder;
use Dflydev\DotAccessConfiguration\YamlFileConfigurationBuilder;
use Dflydev\DotAccessConfiguration\ConfigurationInterface;
use Webmozart\PathUtil\Path;

/**
 * Class ConfigurationManager.
 */
class ConfigurationManager
{
    /**
     * @var ConfigurationInterface
     */
    private $configuration = null;

    /**
     * @var string
     */
    private $applicationDirectory = null;

    /**
     * @var array
     */
    private $missingConfigurationFiles = [];

    /**
     * @var array
     */
    private $configurationDirectories = [];

    /**
     * @var array
     */
    private $sites = [];

    /**
     * @param $applicationDirectory
     * @return $this
     */
    public function loadConfiguration($applicationDirectory)
    {
        $homeConfig = Path::getHomeDirectory() . '/.console/';
        if (!is_dir($homeConfig)) {
            mkdir($homeConfig, 0777);
        }

        $this->applicationDirectory = $applicationDirectory;
        $input = new ArgvInput();
        $root = $input->getParameterOption(['--root'], null);

        $configurationDirectories[] = $applicationDirectory;
        $configurationDirectories[] = $applicationDirectory.DRUPAL_CONSOLE_CORE;
        $configurationDirectories[] = $applicationDirectory.DRUPAL_CONSOLE;
        $configurationDirectories[] = '/etc/console/';
        $configurationDirectories[] = Path::getHomeDirectory() . '/.console/';
        $configurationDirectories[] = $applicationDirectory .'/console/';
        if ($root) {
            $configurationDirectories[] = $root . '/console/';
        }
        $configurationDirectories = array_unique($configurationDirectories);

        $configurationFiles = [];
        foreach ($configurationDirectories as $configurationDirectory) {
            $file =  $configurationDirectory . 'config.yml';

            if (stripos($configurationDirectory, '/vendor/') <= 0
                && stripos($configurationDirectory, '/bin/') <= 0
                && stripos($configurationDirectory, 'console/') > 0
            ) {
                $this->configurationDirectories[] = str_replace('//', '/', $configurationDirectory);
            }

            if (!file_exists($file)) {
                $this->missingConfigurationFiles[] = $file;
                continue;
            }
            if (file_get_contents($file)==='') {
                $this->missingConfigurationFiles[] = $file;
                continue;
            }

            $configurationFiles[] = $file;
        }

        $this->configurationDirectories =
            array_unique($this->configurationDirectories);

        $builder = new YamlFileConfigurationBuilder($configurationFiles);
        $this->configuration = $builder->build();
        $aliases = $this->configuration->get('application.extras.alias')?:'true';
        if ($aliases === 'true') {
            $this->appendCommandAliases();
        }
        $mappings = $this->configuration->get('application.extras.mappings')?:'true';
        if ($mappings === 'true') {
            $this->appendCommandMappings();
        }

        if ($configurationFiles) {
            $this->missingConfigurationFiles = [];
        }

        return $this;
    }

    public function loadConfigurationFromDirectory($directory)
    {
        $builder = new YamlFileConfigurationBuilder([$directory.'/console/config.yml']);

        return $builder->build();
    }

    /**
     * @return ConfigurationInterface
     */
    public function getConfiguration()
    {
        return $this->configuration;
    }

    public function readSite($siteFile)
    {
        if (!file_exists($siteFile)) {
            return [];
        }

        return Yaml::parse(file_get_contents($siteFile));
    }

    /**
     * @param $target
     *
     * @return array
     */
    public function readTarget($target)
    {
        if (!array_key_exists($target, $this->sites)) {
            return [];
        }

        $targetInformation = $this->sites[$target];

        if (array_key_exists('host', $targetInformation) && $targetInformation['host'] != 'local') {
            $targetInformation['remote'] = true;
        }

        return array_merge(
            $this->configuration->get('application.remote'),
            $targetInformation
        );
    }

    /**
     * @return string
     */
    public function getApplicationDirectory()
    {
        return $this->applicationDirectory;
    }

    /**
     * Return the sites config directory.
     *
     * @return array
     */
    private function getSitesDirectories()
    {
        $configurationDirectories = $this->getConfigurationDirectories();
        $configurationDirectories = array_map(
            function ($directory) {
                return sprintf(
                    '%s/sites',
                    $directory
                );
            },
            $configurationDirectories
        );

        $configurationDirectories = array_filter(
            $configurationDirectories,
            function ($directory) {
                return is_dir($directory);
            }
        );

        return $configurationDirectories;
    }

    /**
     * @param string $commandName
     * @return mixed
     */
    public function readDrushEquivalents($commandName)
    {
        $equivalents = [];
        $aliasInformation = Yaml::parse(
            file_get_contents(
                $this->applicationDirectory . DRUPAL_CONSOLE_CORE . 'config/drush.yml'
            )
        );

        foreach ($aliasInformation['commands'] as $key => $commands) {
            foreach ($commands as $drush => $console) {
                if($console) {
                    $equivalents[$drush] = $console;
                }
            }
        }

        if (!$commandName) {
            $aliasInformation = [];
            foreach ($equivalents as $key => $alternative) {
                $aliasInformation[] = [$key, $alternative];
            }

            return $aliasInformation;
        }

        if (array_key_exists($commandName, $equivalents)) {
            return $equivalents[$commandName] ?: ' ';
        }

        return [];
    }

    /**
     * @return string
     */
    public function getConsoleDirectory()
    {
        return sprintf('%s/.console/', Path::getHomeDirectory());
    }

    /**
     * @return array
     */
    public function getMissingConfigurationFiles()
    {
        return $this->missingConfigurationFiles;
    }

    /**
     * @return array
     */
    public function getConfigurationDirectories()
    {
        return $this->configurationDirectories;
    }

    /**
     * @return void
     */
    private function appendCommandMappings()
    {
        $mappings = [];
        $mappingsFile = $this->applicationDirectory.DRUPAL_CONSOLE_CORE.'config/mappings.yml';

        if (file_exists($mappingsFile)) {
            $mappings = Yaml::parse(file_get_contents($mappingsFile));
        }

        if (array_key_exists('commands', $mappings) && array_key_exists('mappings', $mappings['commands'])) {
            $this->configuration->set(
                'application.commands.mappings',
                $mappings['commands']['mappings']
            );
        }
    }

    /**
     * @return void
     */
    private function appendCommandAliases()
    {
        $aliases = [];
        foreach ($this->configurationDirectories as $directory) {
            $aliasFile = $directory . 'aliases.yml';
            if (file_exists($aliasFile)) {
                $aliases = array_merge(
                    $aliases,
                    Yaml::parse(file_get_contents($aliasFile))
                );
            }
        }
        if (array_key_exists('commands', $aliases) && array_key_exists('aliases', $aliases['commands'])) {
            $this->configuration->set(
                'application.commands.aliases',
                $aliases['commands']['aliases']
            );
        }
    }

    public function loadExtendConfiguration()
    {
        $directory = Path::getHomeDirectory() . '/.console/extend/';
        if (!is_dir($directory)) {
            return null;
        }

        $autoloadFile = $directory . 'vendor/autoload.php';
        if (!is_file($autoloadFile)) {
            return null;
        }
        include_once $autoloadFile;
        $extendFile= $directory . 'extend.console.config.yml';

        $this->importConfigurationFile($extendFile);
    }

    public function importConfigurationFile($configFile)
    {
        if (is_file($configFile) && file_get_contents($configFile)!='') {
            $builder = new YamlFileConfigurationBuilder([$configFile]);
            $this->configuration->import($builder->build());
        }
    }

    /**
     * @return array
     */
    public function getSites()
    {
        if ($this->sites) {
            return $this->sites;
        }

        $sitesDirectories = $this->getSitesDirectories();
        $finder = new Finder();
        $finder->in($sitesDirectories);
        $finder->name("*.yml");

        foreach ($finder as $site) {
            $siteName = $site->getBasename('.yml');
            $environments = $this->readSite($site->getRealPath());

            if (!$environments || !is_array($environments)) {
                continue;
            }

            foreach ($environments as $environment => $config) {
                $site = $siteName . '.' . $environment;
                $this->sites[$site] = $config;
            }
        }

        return $this->sites;
    }

    public function getHomeDirectory()
    {
        return Path::getHomeDirectory();
    }
}