<?php
$host = 'localhost';
$db   = 'space_odyssey';
$user = 'root';
$pass = '';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];

try {
    $pdo = new PDO($dsn, $user, $pass, $options);

    $pdo->exec("CREATE TABLE IF NOT EXISTS users (
        id INT AUTO_INCREMENT PRIMARY KEY,
        username VARCHAR(255) UNIQUE NOT NULL,
        password VARCHAR(255) NOT NULL,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB;");

    $pdo->exec("CREATE TABLE IF NOT EXISTS scores (
        id INT AUTO_INCREMENT PRIMARY KEY,
        user_id INT NOT NULL,
        score INT NOT NULL,
        level INT NOT NULL,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        INDEX (score),
        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
    ) ENGINE=InnoDB;");

} catch (\PDOException $e) {
    header('Content-Type: application/json');
    echo json_encode(['error' => "Database connection failed: " . $e->getMessage()]);
    exit;
}
?>