<?php
require_once __DIR__ . '/../db/config.php';
header('Content-Type: application/json');
$data = json_decode(file_get_contents('php://input'), true);
if (isset($data['level_id'], $data['stars'])) {
    try {
        $stmt = db()->prepare('INSERT INTO user_progress (level_id, stars) VALUES (?, ?) ON DUPLICATE KEY UPDATE stars = GREATEST(stars, VALUES(stars))');
        $stmt->execute([$data['level_id'], $data['stars']]);
        echo json_encode(['success' => true]);
    } catch (Exception $e) {
        echo json_encode(['error' => $e->getMessage()]);
    }
} else {
    echo json_encode(['error' => 'Missing data']);
}