<?php
/**
 * Test script for Markdown Parser WP enhanced functionality
 * 
 * This script simulates the core functionality of the WordPress plugin
 * in a non-WordPress environment for testing purposes.
 */

// Load Composer autoloader
require_once __DIR__ . '/vendor/autoload.php';

use Symfony\Component\Yaml\Yaml;

// Test URL
$url = 'https://git.rpi-virtuell.de/Comenius-Institut/FOERBICO/raw/branch/main/Website/content/posts/2025-03-20-Workshop-KlimaOER/index.md';

echo "Testing Enhanced Markdown Parser WP functionality...\n\n";
echo "URL: $url\n\n";

try {
    // Fetch markdown content
    echo "Fetching markdown content...\n";
    $content = file_get_contents($url);
    if ($content === false) {
        throw new Exception("Could not load file from URL.");
    }
    echo "Content fetched successfully.\n\n";
    
    // Split YAML and Markdown
    echo "Splitting YAML and Markdown content...\n";
    $parts = explode('---', $content);
    if (count($parts) < 3) {
        throw new Exception("Invalid file format - YAML header not found.");
    }
    
    $yamlContent = trim($parts[1]);
    $markdownContent = trim($parts[2]);
    echo "Content split successfully.\n\n";
    
    // Parse YAML
    echo "Parsing YAML content...\n";
    $parsedYaml = Yaml::parse($yamlContent);
    $jsonOutput = json_encode(
        $parsedYaml, 
        JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE
    );
    echo "YAML parsed successfully.\n\n";
    
    // Remove title heading
    echo "Processing markdown content...\n";
    $markdownLines = explode("\n", $markdownContent);
    foreach ($markdownLines as $key => $line) {
        if (strpos(trim($line), '# ') === 0) {
            unset($markdownLines[$key]);
            break;
        }
    }
    $cleanedMarkdown = implode("\n", $markdownLines);
    echo "Markdown processed successfully.\n\n";
    
    // Save results
    echo "Saving results to files...\n";
    file_put_contents('test-output-metadata.json', $jsonOutput);
    file_put_contents('test-output-content.md', $cleanedMarkdown);
    echo "Results saved successfully.\n\n";
    
    // Simulate mapping JSON to post fields
    echo "Simulating JSON to post fields mapping...\n";
    $postFields = [
        'post_title' => $parsedYaml['title'] ?? $parsedYaml['name'] ?? 'Imported Post',
        'post_excerpt' => $parsedYaml['summary'] ?? $parsedYaml['description'] ?? '',
        'post_date' => $parsedYaml['datePublished'] ?? date('Y-m-d'),
        'post_name' => $parsedYaml['url'] ?? sanitize_title($parsedYaml['title'] ?? ''),
    ];
    echo "Post fields mapped:\n";
    print_r($postFields);
    echo "\n";
    
    // Simulate mapping JSON to post meta
    echo "Simulating JSON to post meta mapping...\n";
    $postMeta = [
        '_markdown_parser_original_metadata' => $parsedYaml,
        '_markdown_parser_license' => $parsedYaml['license'] ?? '',
        '_markdown_parser_original_id' => $parsedYaml['id'] ?? '',
        '_markdown_parser_status' => $parsedYaml['creativeWorkStatus'] ?? '',
        '_markdown_parser_type' => $parsedYaml['type'] ?? '',
        '_markdown_parser_language' => $parsedYaml['inLanguage'] ?? '',
        '_markdown_parser_date_published' => $parsedYaml['datePublished'] ?? '',
        '_markdown_parser_context' => $parsedYaml['@context'] ?? '',
    ];
    echo "Post meta mapped (sample):\n";
    foreach (array_slice($postMeta, 0, 5, true) as $key => $value) {
        if (is_array($value)) {
            echo "$key => [Array]\n";
        } else {
            echo "$key => $value\n";
        }
    }
    echo "...\n\n";
    
    // Simulate mapping JSON to taxonomies
    echo "Simulating JSON to taxonomies mapping...\n";
    $taxonomies = [];
    if (isset($parsedYaml['keywords']) && is_array($parsedYaml['keywords'])) {
        $taxonomies['post_tag'] = $parsedYaml['keywords'];
    }
    echo "Taxonomies mapped:\n";
    print_r($taxonomies);
    echo "\n";
    
    // Simulate converting markdown to Gutenberg blocks
    echo "Simulating markdown to Gutenberg blocks conversion...\n";
    // For testing purposes, we'll just convert a small portion
    $sampleMarkdown = substr($cleanedMarkdown, 0, 500);
    $blocks = [];
    
    // Simple heading detection
    preg_match_all('/^(#{2,6})\s+(.+)$/m', $sampleMarkdown, $headings, PREG_SET_ORDER);
    foreach ($headings as $heading) {
        $level = strlen($heading[1]);
        $blocks[] = "<!-- wp:heading {\"level\":$level} -->\n<h$level>{$heading[2]}</h$level>\n<!-- /wp:heading -->";
    }
    
    // Simple paragraph detection (very simplified)
    preg_match_all('/^(?!#{1,6}\s)(.+)$/m', $sampleMarkdown, $paragraphs, PREG_SET_ORDER);
    foreach ($paragraphs as $paragraph) {
        if (trim($paragraph[1]) !== '') {
            $blocks[] = "<!-- wp:paragraph -->\n<p>{$paragraph[1]}</p>\n<!-- /wp:paragraph -->";
        }
    }
    
    echo "Generated " . count($blocks) . " blocks (sample):\n";
    echo implode("\n\n", array_slice($blocks, 0, 2)) . "\n...\n\n";
    
    // Simulate featured image handling
    echo "Simulating featured image handling...\n";
    $featuredImage = null;
    if (isset($parsedYaml['image'])) {
        $featuredImage = $parsedYaml['image'];
    } elseif (isset($parsedYaml['cover']) && isset($parsedYaml['cover']['image'])) {
        $featuredImage = $parsedYaml['cover']['image'];
        if (isset($parsedYaml['cover']['relative']) && $parsedYaml['cover']['relative'] === true) {
            $baseUrl = dirname($url) . '/';
            $featuredImage = $baseUrl . $featuredImage;
        }
    }
    
    if ($featuredImage) {
        echo "Featured image found: $featuredImage\n";
        echo "Would import to media library and set as featured image.\n\n";
    } else {
        echo "No featured image found.\n\n";
    }
    
    echo "Test completed successfully!\n";
    echo "The enhanced plugin would create a WordPress post with:\n";
    echo "- Title: " . $postFields['post_title'] . "\n";
    echo "- Excerpt: " . substr($postFields['post_excerpt'], 0, 50) . "...\n";
    echo "- Content: " . count($blocks) . " Gutenberg blocks\n";
    echo "- Featured Image: " . ($featuredImage ? "Yes" : "No") . "\n";
    echo "- Tags: " . (isset($taxonomies['post_tag']) ? implode(", ", array_slice($taxonomies['post_tag'], 0, 3)) . "..." : "None") . "\n";
    
} catch (Exception $e) {
    echo "ERROR: " . $e->getMessage() . "\n";
    exit(1);
}