// fullscreen.js
(function () {
  // ─── 1. Localiser la balise <script> ────────────────────────────────────────
  const scriptTag = document.currentScript || (function () {
      const all = document.getElementsByTagName('script');
      for (let i = all.length - 1; i >= 0; i--) {
        if (all[i].src && all[i].src.includes('fullscreen.js')) return all[i];
      }
      return all[all.length - 1];
    })();

  const playcanvasUrl = scriptTag.getAttribute('data-src');
  if (!playcanvasUrl) return;

  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
  const isMobile = isIOS || /Android/i.test(navigator.userAgent);
  const id = Math.random().toString(36).substr(2, 8);

  // ─── 4. Calcul des ratios (Desktop & Mobile Portrait) ────────────────────────
  function computeAspectPadding(aspectStr) {
    if (!aspectStr) return null;
    if (aspectStr.includes(':')) {
      const [w, h] = aspectStr.split(':').map(Number);
      return (w > 0 && h > 0) ? (h / w) * 100 + '%' : null;
    }
    const v = parseFloat(aspectStr);
    return (v > 0) ? (100 / v) + '%' : null;
  }

  const desktopPadding = computeAspectPadding(scriptTag.getAttribute('data-aspect')) || '56.25%';
  const mobilePadding = computeAspectPadding(scriptTag.getAttribute('data-aspect-mobile')) || desktopPadding;

  // ─── 5. Injection du CSS avec Media Queries ──────────────────────────────────
  const style = document.createElement('style');
  style.textContent = `
    .pc-embed-wrapper-${id} {
      position: relative;
      width: 100%;
      height: 0;
      overflow: hidden;
      background: #000;
      box-sizing: border-box;
      /* Ratio par défaut (Paysage / Desktop) */
      padding-bottom: ${desktopPadding}; 
    }

    /* Ratio Mobile Portrait : appliqué uniquement si l'écran est plus haut que large */
    @media (orientation: portrait) and (max-width: 768px) {
      .pc-embed-wrapper-${id} {
        padding-bottom: ${mobilePadding};
      }
    }

    .pc-embed-wrapper-${id}.fake-fullscreen {
      position: fixed !important;
      top: 0 !important;
      left: 0 !important;
      width: 100vw !important;
      height: 100vh !important;
      height: 100dvh !important;
      max-width: 100vw !important;
      max-height: 100dvh !important;
      padding-bottom: 0 !important;
      margin: 0 !important;
      z-index: 99999;
    }
    .pc-embed-inner-${id} {
      position: absolute;
      top: 0; left: 0;
      width: 100%; height: 100%;
    }
    .pc-embed-inner-${id} iframe {
      width: 100%; height: 100%;
      border: none;
      display: block;
    }

    /* ── Boutons (fullscreen + help) ── */
    .pc-fs-btn-${id},
    .pc-help-btn-${id} {
      position: absolute;
      top: 10px;
      z-index: 10;
      width: 36px;
      height: 36px;
      min-width: 36px;
      min-height: 36px;
      border-radius: 50%;
      border: none;
      background: #2E2E2EB3;
      color: #fff;
      font-size: 18px;
      line-height: 1;
      padding: 0;
      box-sizing: border-box;
      display: flex;
      align-items: center;
      justify-content: center;
      -webkit-appearance: none;
      appearance: none;
      cursor: pointer;
      user-select: none;
    }
    .pc-fs-btn-${id} {
      right: 10px;
    }
    .pc-help-btn-${id} {
      right: 54px; /* 10px + 36px + 8px de marge */
    }

    /* ── Panneau d'aide ── */
    .pc-help-panel-${id} {
      display: none;
      position: absolute;
      top: 30%;
      left: 50%;
      transform: translateX(-50%);
      z-index: 20;
      background: #2E2E2EB3;
      color: #fff;
      border-radius: 8px;
      padding: 10px 14px 10px 14px;
      font-size: 13px;
      line-height: 1.7;
      min-width: 220px;
      max-width: 80%;
      box-sizing: border-box;
    }
    .pc-help-panel-${id}.visible {
      display: block;
    }
    .pc-help-close-${id} {
      position: absolute;
      top: 4px;
      right: 10px;
      cursor: pointer;
      font-size: 18px;
      line-height: 1;
      color: #fff;
      user-select: none;
    }
    .pc-help-text-${id} {
      margin-top: 4px;
    }
  `;
  document.head.appendChild(style);

  // ─── 6. Construction du DOM ──────────────────────────────────────────────────
  const wrapper = document.createElement('div');
  wrapper.className = `pc-embed-wrapper-${id}`;

  const inner = document.createElement('div');
  inner.className = `pc-embed-inner-${id}`;

  const iframe = document.createElement('iframe');
  const urlObj = new URL(playcanvasUrl);
  urlObj.searchParams.set('overlay', 'false');
  iframe.src = urlObj.href;
  iframe.setAttribute('allowfullscreen', '');
  iframe.setAttribute('allow', 'autoplay; fullscreen');
  iframe.setAttribute('sandbox', 'allow-scripts allow-same-origin allow-pointer-lock allow-popups allow-forms');

  const fsBtn = document.createElement('button');
  fsBtn.className = `pc-fs-btn-${id}`;
  fsBtn.textContent = '⇱';

  const helpBtn = document.createElement('button');
  helpBtn.className = `pc-help-btn-${id}`;
  helpBtn.textContent = '?';

  // Panneau d'aide
  const helpPanel = document.createElement('div');
  helpPanel.className = `pc-help-panel-${id}`;

  const helpClose = document.createElement('span');
  helpClose.className = `pc-help-close-${id}`;
  helpClose.textContent = '×';

  const helpText = document.createElement('div');
  helpText.className = `pc-help-text-${id}`;

  if (isMobile) {
    helpText.innerHTML =
      '- Se déplacer avec les flèches.<br>' +
      '- Tourner avec un doigt.<br>' +
      '- Zoomer avec deux doigts.<br>' +
      '- ⇱ plein écran.<br>' +
      '- Modifier la qualité avec le menu à gauche.';
  } else {
    helpText.innerHTML =
      '- Se déplacer avec les flèches ou Z, Q, S, D.<br>' +
      '- Tourner avec clic gauche.<br>' +
      '- Zoomer avec la molette.<br>' +
      '- ⇱ plein écran.<br>' +
      '- Modifier la qualité avec le menu à gauche.';
  }

  helpPanel.appendChild(helpClose);
  helpPanel.appendChild(helpText);

  inner.appendChild(iframe);
  wrapper.appendChild(inner);
  wrapper.appendChild(helpBtn);
  wrapper.appendChild(fsBtn);
  wrapper.appendChild(helpPanel);
  scriptTag.parentNode.insertBefore(wrapper, scriptTag.nextSibling);

  // ─── 7. État & Helper ────────────────────────────────────────────────────────
  let isFullscreen = false;
  let savedParent = null;
  let savedNextSibling = null;

  function getHeightUnit() {
    return (CSS && CSS.supports && CSS.supports('height', '100dvh')) ? '100dvh' : '100vh';
  }

  // ─── Gestion du panneau d'aide ───────────────────────────────────────────────
  function toggleHelpPanel(e) {
    e.stopPropagation();
    helpPanel.classList.toggle('visible');
  }

  function hideHelpPanel() {
    helpPanel.classList.remove('visible');
  }

  helpBtn.addEventListener('click', toggleHelpPanel);
  helpClose.addEventListener('click', (e) => {
    e.stopPropagation();
    hideHelpPanel();
  });

  // ─── 8. Styles Plein Écran ───────────────────────────────────────────────────
  function applyFullscreenStyles() {
    const h = isIOS ? getHeightUnit() : '100vh';
    wrapper.style.position = 'fixed';
    wrapper.style.top = '0';
    wrapper.style.left = '0';
    wrapper.style.width = '100vw';
    wrapper.style.height = h;
    wrapper.style.maxHeight = h;
    wrapper.style.paddingBottom = '0';
    wrapper.style.margin = '0';
    wrapper.style.zIndex = '99999';
    wrapper.classList.add('fake-fullscreen');
    fsBtn.textContent = '⇲';
    isFullscreen = true;
  }

  function applyFakeFullscreenStyles() {
    savedParent = wrapper.parentNode;
    savedNextSibling = wrapper.nextSibling;
    document.body.appendChild(wrapper);
    applyFullscreenStyles();
  }

  function restoreStyles() {
    wrapper.style.cssText = ''; 
    // Le CSS via les Media Queries reprendra le dessus automatiquement ici
    wrapper.classList.remove('fake-fullscreen');
    fsBtn.textContent = '⇱';
    isFullscreen = false;

    if (savedParent) {
      savedParent.insertBefore(wrapper, savedNextSibling);
      savedParent = null;
      savedNextSibling = null;
    }
  }

  // ─── 9. Gestionnaires d'événements ───────────────────────────────────────────
  function enterFullscreen() {
    hideHelpPanel();
    if (isIOS) {
      applyFakeFullscreenStyles();
      document.body.style.overflow = 'hidden';
    } else {
      const el = wrapper;
      const req = el.requestFullscreen || el.webkitRequestFullscreen || el.mozRequestFullScreen || el.msRequestFullscreen;
      if (req) {
        req.call(el).catch(() => {
          applyFakeFullscreenStyles();
          document.body.style.overflow = 'hidden';
        });
      } else {
        applyFakeFullscreenStyles();
        document.body.style.overflow = 'hidden';
      }
    }
  }

  function exitFullscreen() {
    if (document.fullscreenElement || document.webkitFullscreenElement) {
      (document.exitFullscreen || document.webkitExitFullscreen || function(){}).call(document);
    }
    restoreStyles();
    document.body.style.overflow = '';
  }

  fsBtn.addEventListener('click', (e) => {
    e.stopPropagation();
    isFullscreen ? exitFullscreen() : enterFullscreen();
  });

  document.addEventListener('fullscreenchange', () => {
    const fsEl = document.fullscreenElement || document.webkitFullscreenElement;
    if (!fsEl && isFullscreen) exitFullscreen();
    else if (fsEl === wrapper && !isFullscreen) applyFullscreenStyles();
  });

  window.addEventListener('resize', () => {
    if (isFullscreen) {
      const h = isIOS ? getHeightUnit() : '100vh';
      wrapper.style.height = h;
      wrapper.style.maxHeight = h;
    }
  });
})();