<?php
/**
 * @package     Plumrocket_CookieConsent
 * @copyright   Copyright (c) 2025 Plumrocket Inc. (https://plumrocket.com)
 * @license     https://plumrocket.com/license   End-user License Agreement
 */

declare(strict_types=1);

namespace Plumrocket\CookieConsent\Block\Html;

use Magento\Framework\Code\Minifier\Adapter\Js\JShrink;
use Magento\Framework\ObjectManagerInterface;
use Magento\Framework\View\Element\Template;
use Magento\Framework\View\Element\Template\Context;
use Magento\Framework\View\Helper\SecureHtmlRenderer;

/**
 * @since 2.0.4
 */
class HeadScripts extends Template
{
    public const SCRIPT_TAG_REPLACEMENT = 'prcookie-head-script';

    /**
     * @var \Magento\Framework\Code\Minifier\Adapter\Js\JShrink
     */
    private $jsMinifier;

    /**
     * @param \Magento\Framework\View\Element\Template\Context    $context
     * @param \Magento\Framework\Code\Minifier\Adapter\Js\JShrink $jsMinifier
     * @param \Magento\Framework\ObjectManagerInterface           $objectManager
     * @param array                                               $data
     */
    public function __construct(
        Context $context,
        JShrink $jsMinifier,
        ObjectManagerInterface $objectManager,
        array $data = []
    ) {
        parent::__construct($context, $data);
        $this->jsMinifier = $jsMinifier;

        /**
         * @TODO Refactor when leave support of Magento 2.3.7 and less
         */
        $this->secureHtmlRenderer = class_exists(SecureHtmlRenderer::class)
            ? $objectManager->get(SecureHtmlRenderer::class)
            : null;
    }

    protected function _toHtml()
    {
        $html = parent::_toHtml();

        preg_match_all('/<script[\s\S]*?\/script>/', $html,  $scriptTags);
        $scriptTags = array_shift($scriptTags);
        foreach ($scriptTags as $scriptTag) {
            try {
                $modifiedScriptTag = $this->modifyScriptTag($scriptTag);
            } catch (\Exception $e) {
                continue;
            }

            $html = str_replace($scriptTag, $modifiedScriptTag, $html);
        }

        return $html;
    }

    /**
     * Modify script tag to prevent from being moved to footer
     *
     * @param string $scriptTag
     * @return string
     * @throws \Exception
     */
    private function modifyScriptTag(string $scriptTag): string
    {
        /**
         * @TODO Refactor when leave support of Magento 2.3.7 and less
         */
        if (! $this->secureHtmlRenderer) {
            preg_match('#<script[\s\S]*?>([^`]*?)<\/script>#', $scriptTag, $matches);

            if(isset($matches[1])) {
                $originalTagContent = $matches[1];
                $minifiedContent = $this->jsMinifier->minify($originalTagContent);
                $scriptTag = str_replace($originalTagContent, $minifiedContent, $scriptTag);
            }

            return str_replace(
                ['<script', '/script>'],
                ['<' . self::SCRIPT_TAG_REPLACEMENT, '/'.self::SCRIPT_TAG_REPLACEMENT.'>'],
                $scriptTag
            );
        }

        $doc = new \DOMDocument();
        $doc->loadHTML($scriptTag);
        $scriptNode = $doc->getElementsByTagName('script')->item(0);

        $tagAttributes = array_column(iterator_to_array($scriptNode->attributes), 'nodeValue', 'name');
        $tagContent = $this->jsMinifier->minify($scriptNode->textContent);

        return $this->secureHtmlRenderer->renderTag(self::SCRIPT_TAG_REPLACEMENT, $tagAttributes, $tagContent, false);
    }
}