// Match video captions to the language the member already chose with the 🌐 button.
//
// Deliberately NOT on by default for English. Someone reading English does not want
// captions forced over the picture; someone who switched the site to Italian almost
// certainly does. So: if their chosen language has a track, show it. Otherwise show
// nothing and leave the player's own CC button to do its job.
//
// Marty + Manson, 2026-09-17. See tools/captions.mjs for how the tracks are built.
(function () {
  function pick() {
    var lang = '';
    try { lang = String(localStorage.getItem('rmc.lang') || '').toLowerCase(); } catch (e) {}
    var vids = document.querySelectorAll('video');
    for (var i = 0; i < vids.length; i++) {
      var tt = vids[i].textTracks;
      if (!tt || !tt.length) continue;
      var wanted = null;
      for (var j = 0; j < tt.length; j++) {
        if (tt[j].kind !== 'captions' && tt[j].kind !== 'subtitles') continue;
        // never leave a stale track showing when the member switches language
        tt[j].mode = 'disabled';
        if (lang && lang !== 'en' && String(tt[j].language || '').toLowerCase() === lang) wanted = tt[j];
      }
      if (wanted) wanted.mode = 'showing';
    }
  }
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', pick);
  else pick();
  // translate.js writes rmc.lang when the member picks a language; re-run so the
  // captions follow without a reload, and cover players rendered later.
  window.addEventListener('storage', function (e) { if (!e || e.key === 'rmc.lang') pick(); });
  window.RMCCaptions = { refresh: pick };
})();