// interface.js
// ==============================

// Garde global: si ce module a déjà initialisé toutes les balises, on ne refait pas
if (!window.__PLY_IFACE_INIT_DONE__) {
  window.__PLY_IFACE_INIT_DONE__ = true;

  (async function () {
    // Trouve toutes les balises <script src=".../interface.js" data-config="...">
    const scriptTags = Array.from(
      document.querySelectorAll('script[type="module"][src*="interface.js"][data-config]')
    );
    if (!scriptTags.length) return;

    // Initialise une instance par balise
    for (const scriptTag of scriptTags) {
      try {
        await initViewerInstance(scriptTag);
      } catch (e) {
        // Évite qu'une erreur d'instance empêche les autres de se créer
        console.error("[interface.js] Instance init error:", e);
      }
    }
  })();
}

async function initViewerInstance(scriptTag) {
  // 1) Lire la config
  const configUrl = scriptTag.getAttribute("data-config");
  if (!configUrl) return;

  let config = {};
  try {
    const response = await fetch(configUrl, { credentials: "omit", cache: "no-store" });
    config = await response.json();
  } catch (error) {
    console.error("[interface.js] Failed to fetch config:", error);
    return;
  }

  // 2) Injecter la CSS si nécessaire (une seule fois par href)
  try {
    if (
      config.css_url &&
      !document.querySelector(
        `link[rel="stylesheet"][href="${(window.CSS && CSS.escape) ? CSS.escape(config.css_url) : config.css_url}"]`
      )
    ) {
      const linkEl = document.createElement("link");
      linkEl.rel = "stylesheet";
      linkEl.href = config.css_url;
      document.head.appendChild(linkEl);
    }
  } catch (e) {
    // si CSS.escape indisponible, on ignore la vérif et on insère quand même
    if (config.css_url && !document.querySelector(`link[rel="stylesheet"][href="${config.css_url}"]`)) {
      const linkEl = document.createElement("link");
      linkEl.rel = "stylesheet";
      linkEl.href = config.css_url;
      document.head.appendChild(linkEl);
    }
  }

  // 3) ID unique pour l’instance
  const instanceId = Math.random().toString(36).substr(2, 8);

  // 4) Aspect ratio
  let aspectPercent = "100%";
  if (config.aspect) {
    if (config.aspect.includes(":")) {
      const parts = config.aspect.split(":");
      const w = parseFloat(parts[0]);
      const h = parseFloat(parts[1]);
      if (!isNaN(w) && !isNaN(h) && w > 0) {
        aspectPercent = (h / w) * 100 + "%";
      }
    } else {
      const aspectValue = parseFloat(config.aspect);
      if (!isNaN(aspectValue) && aspectValue > 0) {
        aspectPercent = (100 / aspectValue) + "%";
      }
    }
  } else {
    const parentContainer = scriptTag.parentNode;
    const containerWidth = parentContainer.offsetWidth;
    const containerHeight = parentContainer.offsetHeight;
    if (containerWidth > 0 && containerHeight > 0) {
      aspectPercent = (containerHeight / containerWidth) * 100 + "%";
    }
  }

  // 5) Créer le container du widget
  const widgetContainer = document.createElement("div");
  widgetContainer.id = "ply-widget-container-" + instanceId;
  widgetContainer.classList.add("ply-widget-container");
  widgetContainer.style.height = "0";
  widgetContainer.style.paddingBottom = aspectPercent;
  widgetContainer.setAttribute("data-original-aspect", aspectPercent);

  const tooltipsButtonHTML = config.tooltips_url
    ? `<button id="tooltips-toggle-${instanceId}" class="widget-button tooltips-toggle">⦿</button>`
    : "";

  // NB: on rend le tooltip-panel unique par instance
  widgetContainer.innerHTML = `
    <div id="viewer-container-${instanceId}" class="viewer-container">
      <div id="progress-dialog-${instanceId}" class="progress-dialog">
        <progress id="progress-indicator-${instanceId}" max="100" value="0"></progress>
      </div>
      <button id="fullscreen-toggle-${instanceId}" class="widget-button fullscreen-toggle">⇱</button>
      <button id="help-toggle-${instanceId}" class="widget-button help-toggle">?</button>
      <button id="reset-camera-btn-${instanceId}" class="widget-button reset-camera-btn">
        <span class="reset-icon">⟲</span>
      </button>
      ${tooltipsButtonHTML}
      <div id="menu-content-${instanceId}" class="menu-content">
        <span id="help-close-${instanceId}" class="help-close">×</span>
        <div class="help-text"></div>
      </div>
    </div>
    <div id="tooltip-panel-${instanceId}" class="tooltip-panel" style="display: none;">
      <div class="tooltip-content">
        <span id="tooltip-close-${instanceId}" class="tooltip-close">×</span>
        <div id="tooltip-text-${instanceId}" class="tooltip-text"></div>
        <img id="tooltip-image-${instanceId}" class="tooltip-image" src="" alt="" style="display: none;" />
      </div>
    </div>
  `;

  // Insérer juste après la balise script courante
  scriptTag.parentNode.appendChild(widgetContainer);

  // 6) Références DOM pour cette instance
  const viewerContainerElem = document.getElementById("viewer-container-" + instanceId);
  const fullscreenToggle = document.getElementById("fullscreen-toggle-" + instanceId);
  const helpToggle = document.getElementById("help-toggle-" + instanceId);
  const helpCloseBtn = document.getElementById("help-close-" + instanceId);
  const resetCameraBtn = document.getElementById("reset-camera-btn-" + instanceId);
  const tooltipsToggleBtn = document.getElementById("tooltips-toggle-" + instanceId);
  const menuContent = document.getElementById("menu-content-" + instanceId);
  const helpTextDiv = menuContent.querySelector(".help-text");
  const tooltipPanel = document.getElementById("tooltip-panel-" + instanceId);
  const tooltipTextDiv = document.getElementById("tooltip-text-" + instanceId);
  const tooltipImage = document.getElementById("tooltip-image-" + instanceId);
  const tooltipCloseBtn = document.getElementById("tooltip-close-" + instanceId);

  // Détecteurs (déclarés UNE SEULE FOIS)
  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
  const isMobile = isIOS || /Android/i.test(navigator.userAgent);

  const tooltipInstruction = config.tooltips_url
    ? "- Cliquez sur ⦿ pour afficher/masquer les tooltips.<br>"
    : "";

  if (isMobile) {
    helpTextDiv.innerHTML =
      "- Déplacez vous en glissant deux doigts sur l'écran.<br>" +
      "- Orbitez en glissant un doigt.<br>" +
      "- Zoomez en pinçant avec deux doigts.<br>" +
      tooltipInstruction +
      "- Cliquez sur ⟲ pour réinitialiser la caméra.<br>" +
      "- Cliquez sur ⇱ pour passer en plein écran.<br>";
  } else {
    helpTextDiv.innerHTML =
      "- Orbitez avec le clic droit ou shift + ←↑↓→<br>" +
      "- Zoomez avec la molette ou ctrl + ↑↓<br>" +
      "- Déplacez vous avec le clic gauche ou ←↑↓→<br>" +
      tooltipInstruction +
      "- Cliquez sur ⟲ pour réinitialiser la caméra.<br>" +
      "- Cliquez sur ⇱ pour passer en plein écran.<br>";
  }

  // --- DYNAMIC MENU SIZING ---
  function setMenuContentMaxSize() {
    if (!isMobile) {
      menuContent.style.maxWidth = "";
      menuContent.style.maxHeight = "";
      menuContent.style.width = "";
      menuContent.style.height = "";
      menuContent.style.overflowY = "";
      menuContent.style.overflowX = "";
      return;
    }
    const parent = viewerContainerElem;
    if (parent) {
      const vw = parent.offsetWidth;
      const vh = parent.offsetHeight;
      if (vw && vh) {
        menuContent.style.maxWidth = Math.round(vw * 0.8) + "px";
        menuContent.style.maxHeight = Math.round(vh * 0.8) + "px";
        menuContent.style.width = "";
        menuContent.style.height = "";
        menuContent.style.overflowY = "auto";
        menuContent.style.overflowX = "auto";
      } else {
        menuContent.style.maxWidth = "80vw";
        menuContent.style.maxHeight = "80vh";
        menuContent.style.overflowY = "auto";
        menuContent.style.overflowX = "auto";
      }
    }
  }
  setMenuContentMaxSize();
  window.addEventListener("resize", setMenuContentMaxSize);
  document.addEventListener("fullscreenchange", setMenuContentMaxSize);
  window.addEventListener("orientationchange", setMenuContentMaxSize);

  // --- HELP PANEL DEFAULT VISIBILITY ---
  menuContent.style.display = "block";
  viewerContainerElem.style.display = "block";

  // 7) Charger viewer.js avec un paramètre unique (évite le cache ESM)
  //    -> chaque instance obtient son propre module (et son propre état).
  let viewerModule;
  try {
    const viewerUrl = `https://mikafil-viewer-sgos.static.hf.space/viewer.js?inst=${instanceId}`;
    viewerModule = await import(viewerUrl);
    await viewerModule.initializeViewer(config, instanceId);
  } catch (err) {
    console.error("[interface.js] viewer.js load/init error:", err);
    return;
  }

  const canvasId = "canvas-" + instanceId;
  const canvasEl = document.getElementById(canvasId);

  // 8) Bouton tooltips : cacher si URL non valide
  if (tooltipsToggleBtn) {
    if (!config.tooltips_url) {
      tooltipsToggleBtn.style.display = "none";
    } else {
      fetch(config.tooltips_url)
        .then((resp) => {
          if (!resp.ok) tooltipsToggleBtn.style.display = "none";
        })
        .catch(() => {
          tooltipsToggleBtn.style.display = "none";
        });
    }
  }

  // 9) Panneau tooltips & interactions locales
  let dragHide = null;
  function hideTooltipPanel() {
    if (dragHide) {
      viewerContainerElem.removeEventListener("pointermove", dragHide);
      dragHide = null;
    }
    tooltipPanel.style.display = "none";
  }
  function hideHelpPanel() {
    menuContent.style.display = "none";
  }

  if (canvasEl) {
    canvasEl.addEventListener("wheel", hideTooltipPanel, { passive: true });
  }

  // NB : l’événement 'tooltip-selected' est global (tooltips.js l’émet sur document).
  // Toutes les instances l’écoutent. Pour un découplage fin, il faudrait faire
  // passer un identifiant d’instance dans detail (modif. de tooltips.js).
  document.addEventListener("tooltip-selected", (evt) => {
    // Affiche le panneau, annule un hide différé si présent
    if (dragHide) {
      viewerContainerElem.removeEventListener("pointermove", dragHide);
      dragHide = null;
    }
    const { title, description, imgUrl } = evt.detail || {};
    tooltipTextDiv.innerHTML = `<strong>${title || ""}</strong><br>${description || ""}`;
    tooltipImage.style.display = "none";
    tooltipImage.src = "";
    if (imgUrl) {
      tooltipImage.onload = () => {
        tooltipImage.style.display = "block";
      };
      tooltipImage.src = imgUrl;
    }
    tooltipPanel.style.display = "flex";

    // Fermer en cas de drag (après un petit délai pour éviter un flicker)
    setTimeout(() => {
      dragHide = (e) => {
        if ((e.pointerType === "mouse" && e.buttons !== 0) || e.pointerType === "touch") {
          hideTooltipPanel();
        }
      };
      viewerContainerElem.addEventListener("pointermove", dragHide);
    }, 100);
  });

  let isFullscreen = false;
  let savedState = null;

  function saveCurrentState() {
    if (isFullscreen) return;
    const originalAspect = widgetContainer.getAttribute("data-original-aspect") || aspectPercent;
    savedState = {
      widget: {
        position: widgetContainer.style.position,
        top: widgetContainer.style.top,
        left: widgetContainer.style.left,
        width: widgetContainer.style.width,
        height: widgetContainer.style.height,
        maxWidth: widgetContainer.style.maxWidth,
        maxHeight: widgetContainer.style.maxHeight,
        paddingBottom: widgetContainer.style.paddingBottom || originalAspect,
        margin: widgetContainer.style.margin
      },
      viewer: {
        borderRadius: viewerContainerElem.style.borderRadius,
        border: viewerContainerElem.style.border
      }
    };
  }

  function restoreOriginalStyles() {
    if (!savedState) return;
    const aspectToUse = savedState.widget.paddingBottom;

    widgetContainer.style.position = savedState.widget.position || "";
    widgetContainer.style.top = savedState.widget.top || "";
    widgetContainer.style.left = savedState.widget.left || "";
    widgetContainer.style.width = "100%";
    widgetContainer.style.height = "0";
    widgetContainer.style.maxWidth = savedState.widget.maxWidth || "";
    widgetContainer.style.maxHeight = savedState.widget.maxHeight || "";
    widgetContainer.style.paddingBottom = aspectToUse;
    widgetContainer.style.margin = savedState.widget.margin || "";
    widgetContainer.classList.remove("fake-fullscreen");

    viewerContainerElem.style.position = "absolute";
    viewerContainerElem.style.top = "0";
    viewerContainerElem.style.left = "0";
    viewerContainerElem.style.right = "0";
    viewerContainerElem.style.bottom = "0";
    viewerContainerElem.style.width = "100%";
    viewerContainerElem.style.height = "100%";
    viewerContainerElem.style.borderRadius = savedState.viewer.borderRadius || "";
    viewerContainerElem.style.border = savedState.viewer.border || "";

    if (viewerModule.app) {
      viewerModule.app.resizeCanvas(
        viewerContainerElem.clientWidth,
        viewerContainerElem.clientHeight
      );
    }

    if (fullscreenToggle) fullscreenToggle.textContent = "⇱";

    savedState = null;
    setMenuContentMaxSize();
  }

  function applyFullscreenStyles() {
    widgetContainer.style.position = "fixed";
    widgetContainer.style.top = "0";
    widgetContainer.style.left = "0";
    widgetContainer.style.width = "100vw";
    widgetContainer.style.height = "100vh";
    widgetContainer.style.maxWidth = "100vw";
    widgetContainer.style.maxHeight = "100vh";
    widgetContainer.style.paddingBottom = "0";
    widgetContainer.style.margin = "0";
    widgetContainer.style.border = "none";
    widgetContainer.style.borderRadius = "0";

    viewerContainerElem.style.width = "100%";
    viewerContainerElem.style.height = "100%";
    viewerContainerElem.style.borderRadius = "0";
    viewerContainerElem.style.border = "none";

    if (viewerModule.app) {
      viewerModule.app.resizeCanvas(window.innerWidth, window.innerHeight);
    }

    if (fullscreenToggle) fullscreenToggle.textContent = "⇲";
    isFullscreen = true;
    setMenuContentMaxSize();
  }

  function enterFullscreen() {
    if (!savedState) saveCurrentState();
    if (isIOS) {
      applyFullscreenStyles();
      widgetContainer.classList.add("fake-fullscreen");
    } else if (widgetContainer.requestFullscreen) {
      widgetContainer
        .requestFullscreen()
        .then(applyFullscreenStyles)
        .catch(() => {
          applyFullscreenStyles();
          widgetContainer.classList.add("fake-fullscreen");
        });
    } else {
      applyFullscreenStyles();
      widgetContainer.classList.add("fake-fullscreen");
    }
  }

  function exitFullscreen() {
    if (document.fullscreenElement === widgetContainer && document.exitFullscreen) {
      document.exitFullscreen().catch(() => {});
    }
    widgetContainer.classList.remove("fake-fullscreen");
    restoreOriginalStyles();
    isFullscreen = false;
    if (fullscreenToggle) fullscreenToggle.textContent = "⇱";
    setMenuContentMaxSize();
  }

  fullscreenToggle.addEventListener("click", () => {
    hideTooltipPanel();
    isFullscreen ? exitFullscreen() : enterFullscreen();
  });

  document.addEventListener("fullscreenchange", () => {
    if (!document.fullscreenElement && isFullscreen) {
      isFullscreen = false;
      restoreOriginalStyles();
      if (fullscreenToggle) fullscreenToggle.textContent = "⇱";
    } else if (document.fullscreenElement === widgetContainer) {
      if (fullscreenToggle) fullscreenToggle.textContent = "⇲";
    }
    setMenuContentMaxSize();
  });

  helpToggle.addEventListener("click", (e) => {
    hideTooltipPanel();
    e.stopPropagation();
    if (menuContent.style.display === "block") {
      menuContent.style.display = "none";
    } else {
      menuContent.style.display = "block";
      setMenuContentMaxSize();
    }
  });
  helpCloseBtn.addEventListener("click", hideHelpPanel);

  resetCameraBtn.addEventListener("click", () => {
    hideTooltipPanel();
    if (viewerModule.resetViewerCamera) {
      viewerModule.resetViewerCamera();
    }
  });

  if (tooltipsToggleBtn) {
    let tooltipsVisible = !!config.showTooltipsDefault;
    tooltipsToggleBtn.style.opacity = tooltipsVisible ? "1" : "0.5";
    tooltipsToggleBtn.addEventListener("click", () => {
      hideTooltipPanel();
      tooltipsVisible = !tooltipsVisible;
      tooltipsToggleBtn.style.opacity = tooltipsVisible ? "1" : "0.5";
      document.dispatchEvent(
        new CustomEvent("toggle-tooltips", { detail: { visible: tooltipsVisible } })
      );
    });
  }

  tooltipCloseBtn.addEventListener("click", hideTooltipPanel);

  document.addEventListener("keydown", (e) => {
    if ((e.key === "Escape" || e.key === "Esc") && isFullscreen) exitFullscreen();
  });

  window.addEventListener("resize", () => {
    if (viewerModule.app) {
      if (isFullscreen) {
        viewerModule.app.resizeCanvas(window.innerWidth, window.innerHeight);
      } else {
        viewerModule.app.resizeCanvas(
          viewerContainerElem.clientWidth,
          viewerContainerElem.clientHeight
        );
      }
    }
    setMenuContentMaxSize();
  });

  // Init par défaut
  setTimeout(() => {
    // Sauvegarder l'état non-fullscreen courant
    saveCurrentState();
    // Propager l'état par défaut des tooltips (global pour l’instant)
    document.dispatchEvent(
      new CustomEvent("toggle-tooltips", { detail: { visible: !!config.showTooltipsDefault } })
    );
    setMenuContentMaxSize();
  }, 200);
}