<?php

namespace App\Services\Email;

use Exception;

/**
 * Email Template Renderer
 *
 * Handles the rendering of email templates with variable substitution.
 *
 * @package App\Services\Email
 */
class EmailTemplateRenderer
{
    /**
     * Render an email template with variables
     *
     * @param string $templateName Template name
     * @param array $variables Variables to pass to the template
     * @return string Rendered template
     * @throws Exception If template not found
     */
    public function render(string $templateName, array $variables = []): string
    {
        $templatePath = ROOT_DIR . '/app/Views/emails/' . $templateName . '.php';

        if (!file_exists($templatePath)) {
            throw new Exception("Email template not found: $templateName");
        }

        // Extract variables to make them available in the template
        extract($variables);

        // Start output buffering
        ob_start();

        // Include the template file
        include $templatePath;

        // Get the content and clean the buffer
        return ob_get_clean();
    }

    /**
     * Better HTML to plain text conversion
     *
     * @param string $html HTML content
     * @return string Plain text version
     */
    public function htmlToPlainText(string $html): string
    {
        // Replace common HTML elements with their text equivalents
        $html = preg_replace('/<br\s*\/?>|<\/p>|<\/div>|<\/h[1-6]>/i', "\n", $html);
        $html = preg_replace('/<li\s*>/i', "• ", $html);
        $html = preg_replace('/<\/li>/i', "\n", $html);

        // Strip remaining HTML tags
        $text = strip_tags($html);

        // Decode HTML entities
        $text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');

        // Remove extra whitespace
        $text = preg_replace('/\s+/', ' ', $text);
        $text = preg_replace('/\n\s+/', "\n", $text);
        $text = preg_replace('/\n{3,}/', "\n\n", $text);

        return trim($text);
    }
}