// In-Telegram polish for every site page. No-ops in a normal browser; inside
// the Mini App webview it lazy-loads the vendored Telegram SDK (CSP stays
// script-src 'self') and wires theme + BackButton so pages feel native.
(function () {
  'use strict';
  var inTg = false;
  try { inTg = sessionStorage.getItem('rmcTg') === '1'; } catch (e) {}
  if (!inTg && (window.TelegramWebviewProxy !== undefined || /tgWebApp(Data|Platform)/.test(location.hash))) inTg = true;
  if (!inTg) return;
  window.__rmcInTg = 1; // synchronous flag for page scripts (join-now.js etc.)
  try { sessionStorage.setItem('rmcTg', '1'); } catch (e) {}

  function boot() {
    var tg = window.Telegram && window.Telegram.WebApp;
    if (!tg || !tg.initData) return;
    tg.ready();
    try { tg.expand(); } catch (e) {}
    try { tg.setHeaderColor('#071421'); tg.setBackgroundColor('#071421'); } catch (e) {}
    // Back button mirrors webview history: /app enters via location.replace, so
    // the landing dashboard has no history and stays clean; any deeper page
    // (tools, training, another member view) gets a native back arrow.
    var bb = tg.BackButton;
    if (bb && history.length > 1) {
      bb.show();
      bb.onClick(function () { history.back(); });
    }
    // External links must LEAVE the webview: wallet deep links (MetaMask/Trust)
    // have to reach the wallet app, t.me links belong to Telegram itself, and
    // explorers etc. open in the system browser. Same-origin links stay inside.
    document.addEventListener('click', function (ev) {
      var a = ev.target && ev.target.closest && ev.target.closest('a[href]');
      if (!a) return;
      var href = a.href || '';
      if (!/^https?:/i.test(href)) return;
      var ext = false;
      try { ext = new URL(href).origin !== location.origin; } catch (e) {}
      if (!ext) return;
      ev.preventDefault();
      try {
        if (/^https:\/\/t\.me\//i.test(href) && tg.openTelegramLink) tg.openTelegramLink(href);
        else tg.openLink(href);
      } catch (e) { location.href = href; }
    }, true);
  }
  if (window.Telegram && window.Telegram.WebApp) { boot(); return; }
  var s = document.createElement('script');
  s.src = '/telegram-web-app.js';
  s.onload = boot;
  document.head.appendChild(s);
})();