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<?php
include_once "class/class.php";
session_start();

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_POST['quiz_id']) && isset($_POST['question_id']) && isset($_POST['answer'])) {
        $quiz_id = intval($_POST['quiz_id']);
        $question_id = intval($_POST['question_id']);
        $user_answer = trim($_POST['answer']);

        // Verkrijg de juiste antwoord voor de vraag
        $sql = "SELECT question, correct_answer FROM questions WHERE question_id = :question_id";
        $stmt = Database::conn()->prepare($sql);
        $stmt->bindParam(':question_id', $question_id, PDO::PARAM_INT);
        $stmt->execute();
        $question = $stmt->fetch(PDO::FETCH_ASSOC);

        if ($question) {
            $correct_answer = $question['correct_answer'];

            // Vergelijk het antwoord
            $is_correct = strcasecmp($user_answer, $correct_answer) == 0;

            // Bewaar de score in de sessie
            if ($is_correct) {
                if (!isset($_SESSION['score'])) {
                    $_SESSION['score'] = 0;
                }
                $_SESSION['score'] += 1;
            }

            // Retourneer feedback naar de frontend
            echo json_encode([
                'status' => $is_correct ? 'success' : 'error',
                'score' => $_SESSION['score'],
                'correct_answer' => $correct_answer
            ]);
        } else {
            echo json_encode(['status' => 'error', 'message' => 'Vraag niet gevonden']);
        }
    } else {
        echo json_encode(['status' => 'error', 'message' => 'Ongeldige invoer']);
    }
} else {
    echo json_encode(['status' => 'error', 'message' => 'Fout bij het verwerken van de aanvraag']);
}
?>

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