// Collapsible walkthrough player for Suite tool pages.
//
// Placement reasoning (Marty's call): the video belongs at the TOP of the tool,
// because a video in a separate library never gets watched — but it must not be
// an embedded player, because after the first week most visits are returning
// members who came to USE the tool, and a player pushes the tool below the fold
// on mobile every single time.
//
// So: a one-line bar that expands inline, auto-opened on the member's FIRST
// visit to that specific tool and collapsed on every visit after. The state is
// per-tool, per-browser. localStorage can throw outright in some contexts
// (private windows, blocked site data), so every access is guarded and the bar
// falls back to "collapsed but present" rather than breaking the page.
(function () {
  'use strict';

  var el = document.currentScript;
  var SRC = el && el.getAttribute('data-video');
  var TITLE = (el && el.getAttribute('data-title')) || 'Watch the walkthrough';
  var KEY = 'rmc.tv.' + ((el && el.getAttribute('data-key')) || (location.pathname.replace(/\W+/g, '') || 'tool'));
  var SECS = (el && el.getAttribute('data-secs')) || '';
  if (!SRC) return;

  function seen() { try { return localStorage.getItem(KEY) === '1'; } catch (e) { return true; } }
  function markSeen() { try { localStorage.setItem(KEY, '1'); } catch (e) {} }

  function build() {
    var host = document.querySelector('main') || document.body;
    var wrap = document.createElement('div');
    wrap.className = 'tv-wrap';

    var bar = document.createElement('button');
    bar.type = 'button';
    bar.className = 'tv-bar';
    bar.setAttribute('aria-expanded', 'false');
    bar.innerHTML = '<span class="tv-play">▶</span><span class="tv-t">' + TITLE +
      (SECS ? ' <span class="tv-secs">' + SECS + '</span>' : '') + '</span><span class="tv-chev">⌄</span>';

    var body = document.createElement('div');
    body.className = 'tv-body';
    body.hidden = true;

    var vid = document.createElement('video');
    vid.controls = true;
    // Poster lives beside the video (same slug, .jpg). Without it the browser
    // shows frame zero, and frame zero is the instant before the page painted
    // — a blank white rectangle that reads as a broken player.
    vid.poster = SRC.replace(/\.mp4$/, '.jpg');
    // Nothing is fetched until the panel is actually opened; open() then bumps
    // this to 'metadata' so an expanded panel shows a real first frame rather
    // than a black rectangle.
    vid.preload = 'none';
    vid.playsInline = true;
    vid.src = SRC;
    body.appendChild(vid);

    function open() {
      body.hidden = false;
      wrap.classList.add('on');
      bar.setAttribute('aria-expanded', 'true');
      // Deliberately NOT autoplaying. Browsers only permit autoplay when the
      // video is muted, and a silent walkthrough is worthless here — the
      // narration IS the training. So on first visit the panel opens with the
      // video paused and the play button showing; pressing it is a user
      // gesture, which means it plays with sound, every time.
      vid.preload = 'metadata';
    }
    function close() {
      body.hidden = true;
      wrap.classList.remove('on');
      bar.setAttribute('aria-expanded', 'false');
      vid.pause();
    }

    bar.addEventListener('click', function () {
      if (body.hidden) { open(); markSeen(); }
      else close();
    });

    wrap.appendChild(bar);
    wrap.appendChild(body);

    // Sit directly under the page heading if there is one, otherwise at the top.
    var h1 = host.querySelector('h1');
    var lede = h1 && h1.nextElementSibling && /lede|sub/.test(h1.nextElementSibling.className || '')
      ? h1.nextElementSibling : h1;
    if (lede && lede.parentNode) lede.parentNode.insertBefore(wrap, lede.nextSibling);
    else host.insertBefore(wrap, host.firstChild);

    if (!seen()) { open(); markSeen(); }
  }

  function style() {
    if (document.getElementById('tv-style')) return;
    var s = document.createElement('style');
    s.id = 'tv-style';
    s.textContent = [
      '.tv-wrap{margin:0 0 18px}',
      '.tv-bar{display:flex;align-items:center;gap:10px;width:100%;text-align:left;cursor:pointer;',
      '  background:rgba(212,175,55,.08);border:1px solid var(--gold,#d4af37);border-radius:12px;',
      '  color:var(--text,#e8eef4);padding:11px 15px;font:inherit;font-size:14.5px;font-weight:700}',
      '.tv-bar:hover{background:rgba(212,175,55,.14)}',
      '.tv-bar:focus-visible{outline:2px solid var(--teal,#4ed6cb);outline-offset:2px}',
      '.tv-play{color:var(--gold,#d4af37);font-size:12px}',
      '.tv-t{flex:1}',
      '.tv-secs{color:var(--muted,#8fa6bb);font-weight:600;font-size:12.5px}',
      '.tv-chev{color:var(--muted,#8fa6bb);transition:transform .18s}',
      '.tv-wrap.on .tv-chev{transform:rotate(180deg)}',
      '.tv-body{margin-top:10px;border:1px solid var(--line,#24425d);border-radius:12px;overflow:hidden;line-height:0}',
      '.tv-body video{width:100%;height:auto;display:block;background:#000}',
      '@media (prefers-reduced-motion:reduce){.tv-chev{transition:none}}'
    ].join('');
    document.head.appendChild(s);
  }

  function go() { style(); build(); }
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', go);
  else go();
})();