<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Math;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

use FluidTYPO3\Vhs\Traits\ArrayConsumingViewHelperTrait;
use FluidTYPO3\Vhs\Utility\ErrorUtility;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithContentArgumentAndRenderStatic;

/**
 * Math: Maximum
 *
 * Gets the highest number in array $a or the highest
 * number of numbers $a and $b.
 */
class MaximumViewHelper extends AbstractMultipleMathViewHelper
{
    use CompileWithContentArgumentAndRenderStatic;
    use ArrayConsumingViewHelperTrait;

    public function initializeArguments(): void
    {
        parent::initializeArguments();
        $this->overrideArgument('b', 'mixed', 'Second number or Iterator/Traversable/Array for calculation');
    }

    /**
     * @param mixed $a
     * @param mixed $b
     * @return mixed
     */
    protected static function calculateAction($a, $b, array $arguments)
    {
        $aIsIterable = static::assertIsArrayOrIterator($a);
        if (!$aIsIterable && $b === null && $arguments['fail']) {
            ErrorUtility::throwViewHelperException('Required argument "b" was not supplied', 1237823699);
        }
        if ($aIsIterable && null === $b) {
            $a = static::arrayFromArrayOrTraversableOrCSVStatic($a);
            return max($a);
        }
        return max($a, $b);
    }
}