viewer.js

// viewer.js
// ==============================

async function loadImageAsTexture(url, app) {
  return new Promise((resolve, reject) => {
    const img = new window.Image();
    img.crossOrigin = "anonymous";
    img.onload = function () {
      const tex = new pc.Texture(app.graphicsDevice, {
        width: img.width,
        height: img.height,
        format: pc.PIXELFORMAT_R8_G8_B8_A8
      });
      tex.setSource(img);
      resolve(tex);
    };
    img.onerror = reject;
    img.src = url;
  });
}

// --- Patch all window.Image to force crossOrigin="anonymous" ---
(function () {
  const OriginalImage = window.Image;
  window.Image = function (...args) {
    const img = new OriginalImage(...args);
    img.crossOrigin = "anonymous";
    return img;
  };
})();

function hexToRgbaArray(hex) {
  try {
    hex = hex.replace("#", "");
    if (hex.length === 6) hex += "FF";
    if (hex.length !== 8) return [1, 1, 1, 1];
    const num = parseInt(hex, 16);
    return [
      ((num >> 24) & 0xff) / 255,
      ((num >> 16) & 0xff) / 255,
      ((num >> 8) & 0xff) / 255,
      (num & 0xff) / 255
    ];
  } catch (e) {
    alert("hexToRgbaArray error: " + e);
    return [1, 1, 1, 1];
  }
}

// ----- Utility: Recursive scene traversal -----
function traverse(entity, callback) {
  callback(entity);
  if (entity.children) {
    entity.children.forEach((child) => traverse(child, callback));
  }
}

// Charger orbit-camera.js **par application**
const ORBIT_URL = "https://mikafil-viewer-sgos.static.hf.space/orbit-camera.js";
function loadOrbitScriptsForApp(app, instanceId) {
  return new Promise((resolve, reject) => {
    // Si déjà enregistré dans CETTE app, ne rien faire
    try {
      if (app?.scripts?.get && app.scripts.get("orbitCamera")) return resolve();
    } catch (_) {}

    const asset = new pc.Asset("orbit-" + instanceId, "script", { url: ORBIT_URL });
    app.assets.add(asset);
    asset.once("load", () => resolve());
    asset.once("error", (e) => {
      console.error("[viewer.js] orbit-camera.js load error:", e);
      reject(e);
    });
    app.assets.load(asset);
  });
}

let pc;
export let app = null;
let cameraEntity = null;
let modelEntity = null;
let viewerInitialized = false;
let resizeObserver = null;

let chosenCameraX, chosenCameraY, chosenCameraZ;
let minZoom, maxZoom, minAngle, maxAngle, minAzimuth, maxAzimuth, minPivotY, minY;
let modelX, modelY, modelZ, modelScale, modelRotationX, modelRotationY, modelRotationZ;

let presentoirScaleX, presentoirScaleY, presentoirScaleZ;

let sogsUrl, glbUrl, presentoirUrl;

let color_bg_hex, color_bg, espace_expo_bool;

export async function initializeViewer(config, instanceId) {
  if (viewerInitialized) return;

  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent);
  const isMobile = isIOS || /Android/i.test(navigator.userAgent);

  // Config
  sogsUrl = config.sogs_json_url;
  glbUrl =
    config.glb_url !== undefined
      ? config.glb_url
      : "https://huggingface.co/datasets/MikaFil/viewer_gs/resolve/main/ressources/espace_expo/sol_blanc_2.glb";
  presentoirUrl =
    config.presentoir_url !== undefined
      ? config.presentoir_url
      : "https://huggingface.co/datasets/MikaFil/viewer_gs/resolve/main/ressources/espace_expo/sol_blanc_2.glb";
  minZoom = parseFloat(config.minZoom || "1");
  maxZoom = parseFloat(config.maxZoom || "20");
  minAngle = parseFloat(config.minAngle || "-45");
  maxAngle = parseFloat(config.maxAngle || "90");
  minAzimuth =
    config.minAzimuth !== undefined ? parseFloat(config.minAzimuth) : -360;
  maxAzimuth =
    config.maxAzimuth !== undefined ? parseFloat(config.maxAzimuth) : 360;
  minPivotY = parseFloat(config.minPivotY || "0");
  minY = config.minY !== undefined ? parseFloat(config.minY) : 0;

  modelX = config.modelX !== undefined ? parseFloat(config.modelX) : 0;
  modelY = config.modelY !== undefined ? parseFloat(config.modelY) : 0;
  modelZ = config.modelZ !== undefined ? parseFloat(config.modelZ) : 0;
  modelScale = config.modelScale !== undefined ? parseFloat(config.modelScale) : 1;
  modelRotationX =
    config.modelRotationX !== undefined ? parseFloat(config.modelRotationX) : 0;
  modelRotationY =
    config.modelRotationY !== undefined ? parseFloat(config.modelRotationY) : 0;
  modelRotationZ =
    config.modelRotationZ !== undefined ? parseFloat(config.modelRotationZ) : 0;

  presentoirScaleX =
    config.presentoirScaleX !== undefined ? parseFloat(config.presentoirScaleX) : 0;
  presentoirScaleY =
    config.presentoirScaleY !== undefined ? parseFloat(config.presentoirScaleY) : 0;
  presentoirScaleZ =
    config.presentoirScaleZ !== undefined ? parseFloat(config.presentoirScaleZ) : 0;

  const cameraX = config.cameraX !== undefined ? parseFloat(config.cameraX) : 0;
  const cameraY = config.cameraY !== undefined ? parseFloat(config.cameraY) : 2;
  const cameraZ = config.cameraZ !== undefined ? parseFloat(config.cameraZ) : 5;
  const cameraXPhone =
    config.cameraXPhone !== undefined ? parseFloat(config.cameraXPhone) : cameraX;
  const cameraYPhone =
    config.cameraYPhone !== undefined ? parseFloat(config.cameraYPhone) : cameraY;
  const cameraZPhone =
    config.cameraZPhone !== undefined ? parseFloat(config.cameraZPhone) : cameraZ * 1.5;

  color_bg_hex =
    config.canvas_background !== undefined ? config.canvas_background : "#FFFFFF";
  espace_expo_bool =
    config.espace_expo_bool !== undefined ? config.espace_expo_bool : false;
  color_bg = hexToRgbaArray(color_bg_hex);

  chosenCameraX = isMobile ? cameraXPhone : cameraX;
  chosenCameraY = isMobile ? cameraYPhone : cameraY;
  chosenCameraZ = isMobile ? cameraZPhone : cameraZ;

  // Canvas
  const canvasId = "canvas-" + instanceId;
  const progressDialog = document.getElementById("progress-dialog-" + instanceId);
  const viewerContainer = document.getElementById("viewer-container-" + instanceId);

  let oldCanvas = document.getElementById(canvasId);
  if (oldCanvas) oldCanvas.remove();

  const canvas = document.createElement("canvas");
  canvas.id = canvasId;
  canvas.className = "ply-canvas";
  canvas.style.width = "100%";
  canvas.style.height = "100%";
  canvas.setAttribute("tabindex", "0");
  viewerContainer.insertBefore(canvas, progressDialog);

  // Gestes / molette
  canvas.style.touchAction = "none";
  canvas.style.webkitTouchCallout = "none";
  canvas.addEventListener("gesturestart", (e) => e.preventDefault());
  canvas.addEventListener("gesturechange", (e) => e.preventDefault());
  canvas.addEventListener("gestureend", (e) => e.preventDefault());
  canvas.addEventListener("dblclick", (e) => e.preventDefault());
  canvas.addEventListener(
    "touchstart",
    (e) => {
      if (e.touches.length > 1) e.preventDefault();
    },
    { passive: false }
  );
  canvas.addEventListener(
    "wheel",
    (e) => {
      e.preventDefault();
    },
    { passive: false }
  );

  // --- Clavier : bloquer le scroll seulement quand le pointeur est au-dessus du canvas ---
  const scrollKeys = new Set([
    "ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight",
    "PageUp", "PageDown", "Home", "End", " ", "Space", "Spacebar"
  ]);
  let isPointerOverCanvas = false;
  const focusCanvas = () => canvas.focus({ preventScroll: true });

  const onPointerEnter = () => { isPointerOverCanvas = true; focusCanvas(); };
  const onPointerLeave = () => {
    isPointerOverCanvas = false;
    if (document.activeElement === canvas) canvas.blur();
  };

  canvas.addEventListener("pointerenter", onPointerEnter);
  canvas.addEventListener("pointerleave", onPointerLeave);
  canvas.addEventListener("mouseenter", onPointerEnter);
  canvas.addEventListener("mouseleave", onPointerLeave);

  canvas.addEventListener("mousedown", focusCanvas);
  canvas.addEventListener("touchstart", () => { focusCanvas(); }, { passive: false });

  canvas.addEventListener("blur", () => { isPointerOverCanvas = false; });

  const onKeyDownCapture = (e) => {
    if (!isPointerOverCanvas) return;
    if (scrollKeys.has(e.key) || scrollKeys.has(e.code)) {
      e.preventDefault();
    }
  };
  window.addEventListener("keydown", onKeyDownCapture, true);

  progressDialog.style.display = "block";

  if (!pc) {
    pc = await import("https://esm.run/playcanvas");
    window.pc = pc;
  }

  // App
  const device = await pc.createGraphicsDevice(canvas, {
    deviceTypes: ["webgl2"],
    glslangUrl: "https://playcanvas.vercel.app/static/lib/glslang/glslang.js",
    twgslUrl: "https://playcanvas.vercel.app/static/lib/twgsl/twgsl.js",
    antialias: false
  });
  device.maxPixelRatio = Math.min(window.devicePixelRatio, 2);

  const opts = new pc.AppOptions();
  opts.graphicsDevice = device;
  opts.mouse = new pc.Mouse(canvas);
  opts.touch = new pc.TouchDevice(canvas);
  //opts.keyboard = new pc.Keyboard(canvas); // clavier par canvas
  opts.componentSystems = [
    pc.RenderComponentSystem,
    pc.CameraComponentSystem,
    pc.LightComponentSystem,
    pc.ScriptComponentSystem,
    pc.GSplatComponentSystem,
    pc.CollisionComponentSystem,
    pc.RigidbodyComponentSystem
  ];
  opts.resourceHandlers = [
    pc.TextureHandler,
    pc.ContainerHandler,
    pc.ScriptHandler,
    pc.GSplatHandler
  ];

  app = new pc.Application(canvas, opts);
  app.setCanvasFillMode(pc.FILLMODE_NONE);
  app.setCanvasResolution(pc.RESOLUTION_AUTO);

  resizeObserver = new ResizeObserver((entries) => {
    entries.forEach((entry) => {
      app.resizeCanvas(entry.contentRect.width, entry.contentRect.height);
    });
  });
  resizeObserver.observe(viewerContainer);

  window.addEventListener("resize", () =>
    app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight)
  );

  app.on("destroy", () => {
    resizeObserver.disconnect();
    if (opts.keyboard && opts.keyboard.detach) opts.keyboard.detach();
    window.removeEventListener("keydown", onKeyDownCapture, true);
    canvas.removeEventListener("pointerenter", onPointerEnter);
    canvas.removeEventListener("pointerleave", onPointerLeave);
    canvas.removeEventListener("mouseenter", onPointerEnter);
    canvas.removeEventListener("mouseleave", onPointerLeave);
    canvas.removeEventListener("mousedown", focusCanvas);
    canvas.removeEventListener("touchstart", focusCanvas);
  });

  // Assets (sans orbit-camera ici)
  const assets = {
    sogs: new pc.Asset("gsplat", "gsplat", { url: sogsUrl }),
    glb: new pc.Asset("glb", "container", { url: glbUrl }),
    presentoir: new pc.Asset("presentoir", "container", { url: presentoirUrl })
  };
  for (const key in assets) app.assets.add(assets[key]);

  const loader = new pc.AssetListLoader(Object.values(assets), app.assets);
  loader.load(async () => {
    // Charger et enregistrer orbit-camera.js pour CETTE app
    await loadOrbitScriptsForApp(app, instanceId);

    app.start();
    progressDialog.style.display = "none";

    // Entités
    modelEntity = new pc.Entity("model");
    modelEntity.addComponent("gsplat", { asset: assets.sogs });
    modelEntity.setLocalPosition(modelX, modelY, modelZ);
    modelEntity.setLocalEulerAngles(modelRotationX, modelRotationY, modelRotationZ);
    modelEntity.setLocalScale(modelScale, modelScale, modelScale);
    app.root.addChild(modelEntity);

    const glbEntity = assets.glb.resource.instantiateRenderEntity();
    app.root.addChild(glbEntity);

    const presentoirEntity = assets.presentoir.resource.instantiateRenderEntity();
    presentoirEntity.setLocalScale(presentoirScaleX, presentoirScaleY, presentoirScaleZ);
    app.root.addChild(presentoirEntity);

    if (!espace_expo_bool) {
      let matSol = new pc.StandardMaterial();
      matSol.blendType = pc.BLEND_NONE;
      matSol.emissive = new pc.Color(color_bg);
      matSol.emissiveIntensity = 1;
      matSol.useLighting = false;
      matSol.update();

      traverse(presentoirEntity, (node) => {
        if (node.render && node.render.meshInstances) {
          for (let mi of node.render.meshInstances) mi.material = matSol;
        }
      });
      traverse(glbEntity, (node) => {
        if (node.render && node.render.meshInstances) {
          for (let mi of node.render.meshInstances) mi.material = matSol;
        }
      });
    }

    // Caméra + scripts orbit
    cameraEntity = new pc.Entity("camera");
    cameraEntity.addComponent("camera", {
      clearColor: new pc.Color(color_bg),
      nearClip: 0.001,
      farClip: 100
    });
    cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    cameraEntity.lookAt(modelEntity.getPosition());
    cameraEntity.addComponent("script");
    cameraEntity.script.create("orbitCamera", {
      attributes: {
        focusEntity: modelEntity,
        inertiaFactor: 0.2,
        distanceMax: maxZoom,
        distanceMin: minZoom,
        pitchAngleMax: maxAngle,
        pitchAngleMin: minAngle,
        yawAngleMax: maxAzimuth,
        yawAngleMin: minAzimuth,
        minY: minY,
        frameOnStart: false
      }
    });
    cameraEntity.script.create("orbitCameraInputMouse");
    cameraEntity.script.create("orbitCameraInputTouch");
    cameraEntity.script.create("orbitCameraInputKeyboard", {
      attributes: { forwardSpeed: 1.2, strafeSpeed: 1.2 }
    });
    app.root.addChild(cameraEntity);

    app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
    app.once("update", () => resetViewerCamera());

    // Tooltips (optionnel)
    try {
      if (config.tooltips_url) {
        import("./tooltips.js").then((tooltipsModule) => {
          tooltipsModule.initializeTooltips({
            app,
            cameraEntity,
            modelEntity,
            tooltipsUrl: config.tooltips_url,
            defaultVisible: !!config.showTooltipsDefault,
            moveDuration: config.tooltipMoveDuration || 0.6
          });
        }).catch(() => {});
      }
    } catch (_) {}

    viewerInitialized = true;
  });
}

export function resetViewerCamera() {
  try {
    if (!cameraEntity || !modelEntity || !app) return;
    const orbitCam = cameraEntity.script.orbitCamera;
    if (!orbitCam) return;

    const modelPos = modelEntity.getPosition();
    const tempEnt = new pc.Entity();
    tempEnt.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    tempEnt.lookAt(modelPos);

    const dist = new pc.Vec3()
      .sub2(new pc.Vec3(chosenCameraX, chosenCameraY, chosenCameraZ), modelPos)
      .length();

    cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    cameraEntity.lookAt(modelPos);

    orbitCam.pivotPoint = modelPos.clone();
    orbitCam._targetDistance = dist;
    orbitCam._distance = dist;

    const rot = tempEnt.getRotation();
    const fwd = new pc.Vec3();
    rot.transformVector(pc.Vec3.FORWARD, fwd);

    const yaw = Math.atan2(-fwd.x, -fwd.z) * pc.math.RAD_TO_DEG;
    const yawQuat = new pc.Quat().setFromEulerAngles(0, -yaw, 0);
    const rotNoYaw = new pc.Quat().mul2(yawQuat, rot);
    const fNoYaw = new pc.Vec3();
    rotNoYaw.transformVector(pc.Vec3.FORWARD, fNoYaw);
    const pitch = Math.atan2(fNoYaw.y, -fNoYaw.z) * pc.math.RAD_TO_DEG;

    orbitCam._targetYaw = yaw;
    orbitCam._yaw = yaw;
    orbitCam._targetPitch = pitch;
    orbitCam._pitch = pitch;
    if (orbitCam._updatePosition) orbitCam._updatePosition();

    tempEnt.destroy();
  } catch (e) {
    console.error("[VIEWER DEBUG] resetViewerCamera error", e);
  }
}