(function () {
  'use strict';

  var params = new URLSearchParams(window.location.search);
  var redirect = params.get('redirect');
  if (!redirect) {
    window.location.replace('/Main-Menu/');
    return;
  }

  var safe = false;
  try {
    var u = new URL(redirect, window.location.origin);
    if (u.origin === window.location.origin && /^\/Game\/room-lobby\.html$/i.test(u.pathname)) {
      safe = true;
    }
  } catch (e) {
    safe = false;
  }
  if (!safe) {
    window.location.replace('/Game/lobby.html');
    return;
  }

  var totalSlides = 7;
  var idx = 0;
  var slideImg = document.getElementById('slide-img');
  var pageEl = document.getElementById('slide-page');
  var fill = document.getElementById('loading-bar-fill');
  var pctEl = document.getElementById('loading-pct');
  var barWrap = document.getElementById('loading-bar-wrap');

  function pad2(n) {
    return n < 10 ? '0' + n : String(n);
  }

  function showSlide(i) {
    idx = (i + totalSlides * 10) % totalSlides;
    if (slideImg) slideImg.src = 'IMAGE/t-' + pad2(idx + 1) + '.png?v=1';
    if (pageEl) pageEl.textContent = (idx + 1) + ' / ' + totalSlides;
  }

  document.getElementById('btn-prev')?.addEventListener('click', function () {
    showSlide(idx - 1);
  });
  document.getElementById('btn-next')?.addEventListener('click', function () {
    showSlide(idx + 1);
  });

  var durationMs = 6500;
  var startTs = null;
  var navigated = false;

  function goLobby() {
    if (navigated) return;
    navigated = true;
    /* replace = ไม่ให้ room-lobby กด Back กลับมาค้างที่หน้า Loading — ควรกลับไป Main-Menu */
    window.location.replace(redirect);
  }

  document.getElementById('btn-skip')?.addEventListener('click', goLobby);

  function tick(ts) {
    if (navigated) return;
    if (startTs == null) startTs = ts;
    var t = Math.min(1, (ts - startTs) / durationMs);
    var p = Math.min(100, Math.floor(t * 100));
    if (fill) fill.style.width = p + '%';
    if (pctEl) pctEl.textContent = p + '%';
    if (barWrap) barWrap.setAttribute('aria-valuenow', String(p));
    if (t >= 1) {
      goLobby();
      return;
    }
    requestAnimationFrame(tick);
  }
  requestAnimationFrame(tick);
})();