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<?php
/**
 * API Endpoint: Haal woorden op uit de database
 * GET parameters:
 *   - category: (optioneel) Filter op categorie ID
 *   - difficulty: (optioneel) Filter op moeilijkheidsgraad
 *   - limit: (optioneel) Maximum aantal woorden (standaard 10)
 */

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

require_once 'config.php';

try {
    $pdo = getDbConnection();
    
    // Haal parameters op
    $category = isset($_GET['category']) ? intval($_GET['category']) : null;
    $difficulty = isset($_GET['difficulty']) ? $_GET['difficulty'] : null;
    $limit = isset($_GET['limit']) ? intval($_GET['limit']) : 10;
    
    // Bouw de query
    $query = "SELECT w.word_id, w.english_word, w.dutch_translation, w.difficulty_level, 
                     c.category_name 
              FROM words w 
              JOIN categories c ON w.category_id = c.category_id 
              WHERE 1=1";
    
    $params = [];
    
    if ($category !== null) {
        $query .= " AND w.category_id = :category";
        $params[':category'] = $category;
    }
    
    if ($difficulty !== null && in_array($difficulty, ['beginner', 'intermediate', 'advanced'])) {
        $query .= " AND w.difficulty_level = :difficulty";
        $params[':difficulty'] = $difficulty;
    }
    
    $query .= " ORDER BY RAND() LIMIT :limit";
    
    $stmt = $pdo->prepare($query);
    
    // Bind parameters
    foreach ($params as $key => $value) {
        $stmt->bindValue($key, $value);
    }
    $stmt->bindValue(':limit', $limit, PDO::PARAM_INT);
    
    $stmt->execute();
    $words = $stmt->fetchAll();
    
    echo json_encode([
        'success' => true,
        'data' => $words,
        'count' => count($words)
    ]);
    
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'error' => 'Failed to fetch words: ' . $e->getMessage()
    ]);
}

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