// Detects "in-app browsers" — the webviews Telegram, Facebook, Instagram and
// friends open when you tap a link inside them.
//
// Why this exists: a member taps their sponsor's link in a Telegram chat,
// Telegram opens it in its own webview, and that webview can never hold a
// wallet. The page correctly reported "no wallet in this browser" and the
// member correctly replied that they were using Trust — both true, and
// completely at cross purposes. The instruction to "open your wallet's browser"
// is useless when the reason they are here is that they tapped a link.
//
// So: name the actual browser they are in, and give them the one thing that
// actually helps — the address on their clipboard.
(function () {
  'use strict';

  function detect() {
    var ua = navigator.userAgent || '';
    // Telegram exposes a proxy object in its webview on Android, and the Mini
    // App bridge on both. Far more reliable than sniffing its UA, which is a
    // plain Chrome string.
    if (window.TelegramWebviewProxy || (window.Telegram && window.Telegram.WebApp && !window.ethereum)) return 'Telegram';
    if (/FBAN|FBAV|FB_IAB/i.test(ua)) return 'Facebook';
    if (/Instagram/i.test(ua)) return 'Instagram';
    if (/\bLine\//i.test(ua)) return 'LINE';
    if (/\bMessenger\b/i.test(ua)) return 'Messenger';
    if (/\bTwitter\b/i.test(ua)) return 'X';
    // Generic Android WebView: "; wv)" is the giveaway. Only treat it as an
    // in-app browser when no wallet is present, since some wallet browsers are
    // themselves WebViews and those are exactly the ones that DO work.
    if (/; wv\)/i.test(ua) && !window.ethereum) return 'an in-app browser';
    return null;
  }

  window.RMCInApp = {
    name: detect,
    // Returns HTML for the wallet-error slot, or '' when this is a normal
    // browser and the existing "open your wallet's browser" advice is right.
    notice: function (pathForWallet) {
      var w = detect();
      if (!w) return '';
      var url = 'rmcircle.team' + (pathForWallet || location.pathname);
      return '<b>You’re in ' + w + '’s built-in browser</b> — it can’t hold a wallet, ' +
        'so no wallet app can connect here. That’s why this isn’t working, and it’s not anything you did wrong.' +
        '<div style="margin-top:10px"><button type="button" id="rmcCopyAddr" class="btn btn-primary btn-sm">' +
        'Copy this page’s address</button> <span id="rmcCopiedNote" class="micro" style="margin-left:8px"></span></div>' +
        '<div style="margin-top:10px;line-height:1.6">Then open <b>SafePal</b> (or Trust / MetaMask), find its ' +
        '<b>Browser</b> or <b>DApps</b> tab, and paste it there. Typing <b>' + url + '</b> by hand works too.</div>';
    },
    // Wire the copy button after the notice is inserted.
    bind: function (pathForWallet) {
      var btn = document.getElementById('rmcCopyAddr');
      if (!btn) return;
      btn.addEventListener('click', function () {
        var url = 'https://rmcircle.team' + (pathForWallet || location.pathname);
        var note = document.getElementById('rmcCopiedNote');
        function ok() { if (note) note.textContent = 'Copied — now paste it in your wallet’s browser.'; }
        if (navigator.clipboard && navigator.clipboard.writeText) {
          navigator.clipboard.writeText(url).then(ok, function () { fallback(url, ok); });
        } else { fallback(url, ok); }
      });
      function fallback(url, done) {
        // Older webviews have no clipboard API — select the text so a long-press
        // copy works, rather than leaving the button doing nothing.
        var t = document.createElement('textarea');
        t.value = url;
        t.style.cssText = 'position:fixed;left:0;top:0;opacity:0';
        document.body.appendChild(t);
        t.focus(); t.select();
        try { document.execCommand('copy'); done(); } catch (e) {}
        setTimeout(function () { document.body.removeChild(t); }, 100);
      }
    }
  };
})();