(function () {
    // Default game code
    var DEFAULT_GAME_CODE = 'G2510S1T30';

    var gameCode = DEFAULT_GAME_CODE;

    // 1️⃣ Trường hợp: ?gid=G2510S1T30
    var params = new URLSearchParams(window.location.search);
    if (params.has('gid')) {
        gameCode = params.get('gid');
    }

    // 2️⃣ Trường hợp: ?G2510S1T30 (không key)
    else if (window.location.search.length > 1) {
        var raw = window.location.search.substring(1);
        if (/^G\d+/.test(raw)) {
            gameCode = raw;
        }
    }

    // Expose globally
    window.SENA_GAME_CODE = gameCode;

    console.log('[SENA] Game code detected:', gameCode);
})();