// viewer_pr_env.js — Ammo Physics + Box Colliders from GLB AABBs
// ============================================================================
// - Charge PlayCanvas (ESM)
// - Charge Ammo (WASM) avec fallback JS et timeout (anti “écran noir”)
// - Instancie le GLB d’environnement et génère des colliders ‘box’ statiques
//   en lisant les AABB des meshInstances (aucun asset collision requis)
// - Crée un “player” capsule dynamique et attache la caméra en enfant (yeux)
// - Conserve GSplat (.sog) si fourni
// - Logs détaillés pour le debug
// ============================================================================

/* -------------------------------------------
   Surface d’erreurs globale (utile sur HF/iframes)
-------------------------------------------- */
window.addEventListener('error', e => {
  console.error('[BOOT] Uncaught error:', e.message || e.error, e);
});
window.addEventListener('unhandledrejection', e => {
  console.error('[BOOT] Unhandled promise rejection:', e.reason);
});
console.log('[BOOT] JS boot reached');

/* -------------------------------------------
   Utils
-------------------------------------------- */
function hexToRgbaArray(hex) {
  try {
    hex = String(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) {
    console.warn("hexToRgbaArray error:", e);
    return [1, 1, 1, 1];
  }
}

function traverse(entity, callback) {
  callback(entity);
  if (entity.children && entity.children.length) {
    entity.children.forEach((child) => traverse(child, callback));
  }
}

function isMobileUA() {
  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent);
  const isAndroid = /Android/i.test(navigator.userAgent);
  return isIOS || isAndroid;
}

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

/* -------------------------------------------
   Chargement Ammo (WASM + fallback JS) avec timeout
-------------------------------------------- */
async function loadAmmoWithFallback(pc, baseUrl = "https://playcanvas.github.io/examples/lib/ammo/", timeoutMs = 5000) {
  try {
    pc.WasmModule.setConfig("Ammo", {
      glueUrl: baseUrl + "ammo.wasm.js",
      wasmUrl: baseUrl + "ammo.wasm.wasm",
      fallbackUrl: baseUrl + "ammo.js"
    });

    const p = pc.WasmModule.getInstance("Ammo", baseUrl + "ammo.wasm.js");
    if (p && typeof p.then === "function") {
      await Promise.race([
        p,
        new Promise((_, rej) => setTimeout(() => rej(new Error("Ammo load timeout (promise)")), timeoutMs))
      ]);
      console.log("[Ammo] WASM ready (promise API).");
      return true;
    }

    // Callback API (rarement nécessaire)
    await Promise.race([
      new Promise((resolve) => pc.WasmModule.getInstance("Ammo", resolve)),
      new Promise((_, rej) => setTimeout(() => rej(new Error("Ammo load timeout (callback)")), timeoutMs))
    ]);
    console.log("[Ammo] JS fallback ready (callback API).");
    return true;
  } catch (e) {
    console.warn("[Ammo] load failed:", e);
    return false;
  }
}

/* -------------------------------------------
   State (module / instance)
-------------------------------------------- */
let pc;
export let app = null;
let playerEntity = null;   // capsule dynamique (rigidbody)
let cameraEntity = null;   // caméra enfant
let modelEntity = null;    // GSplat principal (optionnel)
let envEntity = null;      // GLB instancié (environnement render)

let viewerInitialized = false;
let resizeObserver = null;
let resizeTimeout = null;

// Config / paramètres courants
let sogUrl, glbUrl, presentoirUrl;
let color_bg_hex, color_bg;
let espace_expo_bool;

// Camera spawn
let chosenCameraX, chosenCameraY, chosenCameraZ;

// DPR / perf
let maxDevicePixelRatio = 1.75;
let interactDpr = 1.0;
let idleRestoreDelay = 350;
let idleTimer = null;

// Physique
let physicsEnabled = true;             // si Ammo indisponible -> false
let ammoBaseUrl = "https://playcanvas.github.io/examples/lib/ammo/";
let freeFly = false;                   // si true => gravity zero (option)
/* -------------------------------------------
   Script FPS minimal (yaw/pitch + ZQSD)
   (nom = 'orbitCamera' pour compat)
-------------------------------------------- */
function ensureFirstPersonScriptRegistered() {
  if (window.__PLY_FPS_REG__) return;
  window.__PLY_FPS_REG__ = true;

  var FPS = pc.createScript('orbitCamera');

  FPS.attributes.add('cameraEntity', { type: 'entity', title: 'Camera (child)' });
  FPS.attributes.add('moveSpeed', { type: 'number', default: 4.0, title: 'Move Speed (m/s)' });
  FPS.attributes.add('lookSpeed', { type: 'number', default: 0.25, title: 'Look Sensitivity' });
  FPS.attributes.add('pitchAngleMin', { type: 'number', default: -89, title: 'Pitch Min (deg)' });
  FPS.attributes.add('pitchAngleMax', { type: 'number', default:  89, title: 'Pitch Max (deg)' });
  FPS.attributes.add('freeFly', { type: 'boolean', default: false, title: 'Free Fly (no gravity)' });

  FPS.prototype.initialize = function () {
    this.yaw = 0;
    this.pitch = 0;
    this._v = new pc.Vec3();

    // init yaw/pitch depuis rotations actuelles
    var qCam = (this.cameraEntity || this.entity).getRotation();
    var f = new pc.Vec3(); qCam.transformVector(pc.Vec3.FORWARD, f);
    this.yaw = Math.atan2(f.x, f.z) * pc.math.RAD_TO_DEG;
    var yawQ = new pc.Quat().setFromEulerAngles(0, -this.yaw, 0);
    var noYawQ = new pc.Quat().mul2(yawQ, qCam);
    var fNoYaw = new pc.Vec3(); noYawQ.transformVector(pc.Vec3.FORWARD, fNoYaw);
    this.pitch = pc.math.clamp(Math.atan2(-fNoYaw.y, -fNoYaw.z) * pc.math.RAD_TO_DEG, this.pitchAngleMin, this.pitchAngleMax);

    // pointer lock au clic gauche
    if (this.app.mouse) {
      this.app.mouse.on(pc.EVENT_MOUSEDOWN, (e) => {
        if (e.button === pc.MOUSEBUTTON_LEFT && document.activeElement === this.app.graphicsDevice.canvas) {
          const c = this.app.graphicsDevice.canvas;
          if (c.requestPointerLock) c.requestPointerLock();
        }
      }, this);

      this.app.mouse.on(pc.EVENT_MOUSEMOVE, (e) => {
        if (document.pointerLockElement !== this.app.graphicsDevice.canvas) return;
        this.yaw   -= e.dx * this.lookSpeed;
        this.pitch -= e.dy * this.lookSpeed;
        this.pitch = pc.math.clamp(this.pitch, this.pitchAngleMin, this.pitchAngleMax);
      }, this);
    }
  };

  FPS.prototype.update = function (dt) {
    // yaw/pitch
    this.entity.setLocalEulerAngles(0, this.yaw, 0);
    if (this.cameraEntity) this.cameraEntity.setLocalEulerAngles(this.pitch, 0, 0);

    // mouvements
    const kb = this.app.keyboard;
    let fwd = 0, str = 0, up = 0;
    if (kb) {
      fwd += (kb.isPressed(pc.KEY_W) || kb.isPressed(pc.KEY_Z) || kb.isPressed(pc.KEY_UP)) ? 1 : 0;
      fwd -= (kb.isPressed(pc.KEY_S) || kb.isPressed(pc.KEY_DOWN)) ? 1 : 0;
      str += (kb.isPressed(pc.KEY_D) || kb.isPressed(pc.KEY_RIGHT)) ? 1 : 0;
      str -= (kb.isPressed(pc.KEY_A) || kb.isPressed(pc.KEY_Q) || kb.isPressed(pc.KEY_LEFT)) ? 1 : 0;

      // free-fly: E/Space monte, C/Ctrl descend
      if (this.freeFly) {
        up += (kb.isPressed(pc.KEY_E) || kb.isPressed(pc.KEY_SPACE)) ? 1 : 0;
        up -= (kb.isPressed(pc.KEY_C) || kb.isPressed(pc.KEY_CTRL)) ? 1 : 0;
      }
    }

    const body = this.entity.rigidbody;
    if (!body) return;

    // directions
    const f = this.entity.forward.clone();
    const r = this.entity.right.clone();
    if (!this.freeFly) { f.y = 0; r.y = 0; }
    if (f.lengthSq()>1e-8) f.normalize();
    if (r.lengthSq()>1e-8) r.normalize();

    // vélocité cible
    const target = new pc.Vec3()
      .add(f.mulScalar(fwd * this.moveSpeed))
      .add(r.mulScalar(str * this.moveSpeed));

    if (this.freeFly) target.y = up * this.moveSpeed;
    else target.y = body.linearVelocity.y; // conserve gravité

    // applique
    this._v.copy(body.linearVelocity);
    this._v.lerp(this._v, target, Math.min(1, dt*10));
    body.linearVelocity = this._v;
  };
}

/* -------------------------------------------
   Initialisation principale
-------------------------------------------- */
export async function initializeViewer(config, instanceId) {
  if (viewerInitialized) return;

  const mobile = isMobileUA();
  console.log("[VIEWER] A: initializeViewer begin ", { instanceId });

  // ---- Lecture config ----
  sogUrl = config.sog_url || config.sogs_json_url || null;
  glbUrl = (config.glb_url !== undefined) ? config.glb_url : null;
  presentoirUrl = (config.presentoir_url !== undefined) ? config.presentoir_url : null;

  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);

  // Camera spawn — valeurs par défaut
  const camX = config.cameraX !== undefined ? parseFloat(config.cameraX) : 0;
  const camY = config.cameraY !== undefined ? parseFloat(config.cameraY) : 1.6;
  const camZ = config.cameraZ !== undefined ? parseFloat(config.cameraZ) : 4.0;

  const camXPhone = config.cameraXPhone !== undefined ? parseFloat(config.cameraXPhone) : camX;
  const camYPhone = config.cameraYPhone !== undefined ? parseFloat(config.cameraYPhone) : camY;
  const camZPhone = config.cameraZPhone !== undefined ? parseFloat(config.cameraZPhone) : camZ * 1.5;

  chosenCameraX = mobile ? camXPhone : camX;
  chosenCameraY = mobile ? camYPhone : camY;
  chosenCameraZ = mobile ? camZPhone : camZ;

  // DPR / perf
  if (config.maxDevicePixelRatio !== undefined) {
    maxDevicePixelRatio = Math.max(0.75, parseFloat(config.maxDevicePixelRatio) || maxDevicePixelRatio);
  }
  if (config.interactionPixelRatio !== undefined) {
    interactDpr = Math.max(0.75, parseFloat(config.interactionPixelRatio) || interactDpr);
  }
  if (config.idleRestoreDelayMs !== undefined) {
    idleRestoreDelay = Math.max(120, parseInt(config.idleRestoreDelayMs, 10) || idleRestoreDelay);
  }

  // Physique
  physicsEnabled = config.usePhysics === false ? false : true; // par défaut true
  freeFly = !!config.freeFly;
  if (config.ammoBaseUrl) {
    ammoBaseUrl = String(config.ammoBaseUrl).endsWith("/") ? config.ammoBaseUrl : (config.ammoBaseUrl + "/");
  }

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

  const old = document.getElementById(canvasId);
  if (old) old.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);

  // interactions de base
  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("wheel", (e) => e.preventDefault(), { passive: false });

  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(); };
  const onCanvasBlur   = () => { isPointerOverCanvas = false; };

  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: true });
  canvas.addEventListener("blur", onCanvasBlur);

  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";

  // ---- Import PlayCanvas ----
  if (!pc) {
    pc = await import("https://esm.run/playcanvas");
    window.pc = pc; // debug
  }
  console.log("[VIEWER] PlayCanvas ESM chargé:", !!pc);

  // ---- Charge Ammo si activé ----
  if (physicsEnabled) {
    const ammoOk = await loadAmmoWithFallback(pc, ammoBaseUrl, mobile ? 6000 : 4000);
    physicsEnabled = !!ammoOk;
    console.log("[VIEWER] Ammo status:", physicsEnabled ? "OK" : "DISABLED");
  }

  // ---- Crée l’Application ----
  const device = await pc.createGraphicsDevice(canvas, {
    deviceTypes: ["webgl2", "webgl1"],
    antialias: false
  });
  device.maxPixelRatio = Math.min(window.devicePixelRatio || 1, maxDevicePixelRatio);

  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);
  // IMPORTANT : inclure Collision et Rigidbody
  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);

  // Gravité selon le mode
  app.scene.gravity = freeFly ? new pc.Vec3(0, 0, 0) : new pc.Vec3(0, -9.81, 0);

  // Resize observé (debounce)
  resizeObserver = new ResizeObserver((entries) => {
    if (!entries || !entries.length) return;
    if (resizeTimeout) clearTimeout(resizeTimeout);
    resizeTimeout = setTimeout(() => {
      app.resizeCanvas(entries[0].contentRect.width, entries[0].contentRect.height);
    }, 60);
  });
  resizeObserver.observe(viewerContainer);

  window.addEventListener("resize", () => {
    if (resizeTimeout) clearTimeout(resizeTimeout);
    resizeTimeout = setTimeout(() => {
      app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
    }, 60);
  });

  app.on("destroy", () => {
    try { resizeObserver.disconnect(); } catch {}
    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);
    canvas.removeEventListener("blur", onCanvasBlur);
  });

  // ---- Assets (SOG + GLB) ----
  const assets = [];
  let sogAsset = null, glbAsset = null;

  if (sogUrl) {
    sogAsset = new pc.Asset("gsplat", "gsplat", { url: sogUrl });
    app.assets.add(sogAsset); assets.push(sogAsset);
  }
  if (glbUrl) {
    glbAsset = new pc.Asset("glb", "container", { url: glbUrl });
    app.assets.add(glbAsset); assets.push(glbAsset);
  } else {
    console.warn("[VIEWER] Aucun glb_url fourni — rien à afficher.");
  }

  // Script FPS (compat nom 'orbitCamera')
  ensureFirstPersonScriptRegistered();

  // Charge les assets requis
  await new Promise((resolve, reject) => {
    const loader = new pc.AssetListLoader(assets, app.assets);
    loader.load(() => resolve());
    loader.on('error', (e)=>{ console.error('[VIEWER] Asset load error:', e); reject(e); });
  });

  app.start();
  progressDialog.style.display = "none";
  console.log("[VIEWER] app.start OK — assets chargés");

  // ---- GSplat (optionnel) ----
  if (sogAsset) {
    modelEntity = new pc.Entity("model");
    modelEntity.addComponent("gsplat", { asset: sogAsset });
    app.root.addChild(modelEntity);
  }

  // ---- Environnement GLB ----
  envEntity = glbAsset && glbAsset.resource ? glbAsset.resource.instantiateRenderEntity() : null;
  if (envEntity) {
    envEntity.name = "ENV_GLTF";
    app.root.addChild(envEntity);

    // Mat “fond uni” si demandé
    if (!espace_expo_bool) {
      const 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(envEntity, (node) => {
        if (node.render && node.render.meshInstances) {
          for (const mi of node.render.meshInstances) mi.material = matSol;
        }
      });
    }

    // ---- Colliders statiques “box” depuis AABB de chaque meshInstance ----
    // Avantage : pas besoin d'asset collision, super robuste.
    if (physicsEnabled) {
      let rawCount = 0;
      let created = 0;
      traverse(envEntity, (node) => {
        if (node.render && node.render.meshInstances && node.render.meshInstances.length) {
          for (const mi of node.render.meshInstances) {
            rawCount++;
            const aabb = mi.aabb; // monde (pour render instancié, AABB est world-space)
            const center = aabb.center.clone();
            const he = aabb.halfExtents.clone();

            // crée un enfant collider “box” placé au centre de l’AABB
            const box = new pc.Entity(`COLL_BOX_${created}`);
            box.setPosition(center);
            box.addComponent('collision', {
              type: 'box',
              halfExtents: he
            });
            box.addComponent('rigidbody', {
              type: 'static',
              friction: 0.6,
              restitution: 0.0
            });
            app.root.addChild(box);
            created++;
          }
        }
      });
      console.log(`[VIEWER] Colliders statiques créés: ${created} (raw meshInstances=${rawCount})`);
    } else {
      console.warn("[VIEWER] Physics disabled: aucun collider statique créé.");
    }
  } else {
    console.warn("[VIEWER] GLB resource missing. Rien à collider.");
  }

  // ---- Caméra + Player capsule ----
  cameraEntity = new pc.Entity("Camera");
  cameraEntity.addComponent("camera", {
    clearColor: new pc.Color(color_bg),
    nearClip: 0.03,
    farClip: 500
  });

  if (physicsEnabled) {
    playerEntity = new pc.Entity("Player");
    const capsuleRadius = config.capsuleRadius !== undefined ? parseFloat(config.capsuleRadius) : 0.35;
    const capsuleHeight = config.capsuleHeight !== undefined ? parseFloat(config.capsuleHeight) : 1.70;

    playerEntity.addComponent('collision', {
      type: 'capsule',
      radius: capsuleRadius,
      height: capsuleHeight
    });
    playerEntity.addComponent('rigidbody', {
      type: 'dynamic',
      mass: 75,
      friction: 0.3,
      restitution: 0.0,
      linearDamping: 0.15,
      angularDamping: 0.999
    });
    // Bloque la rotation pour éviter le roulis
    playerEntity.rigidbody.angularFactor = new pc.Vec3(0, 0, 0);

    // Spawn
    playerEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    app.root.addChild(playerEntity);

    // Caméra à hauteur des yeux
    const eyes = config.eyesOffsetY !== undefined
      ? parseFloat(config.eyesOffsetY)
      : Math.max(0.4, capsuleHeight * 0.9 - capsuleRadius); // ~ yeux
    cameraEntity.setLocalPosition(0, eyes, 0);
    playerEntity.addChild(cameraEntity);

    // Script FPS
    playerEntity.addComponent("script");
    playerEntity.script.create("orbitCamera", {
      attributes: {
        cameraEntity: cameraEntity,
        moveSpeed: (config.moveSpeed !== undefined ? parseFloat(config.moveSpeed) : 4.0),
        lookSpeed: (config.lookSpeed !== undefined ? parseFloat(config.lookSpeed) : 0.25),
        pitchAngleMin: (config.minAngle !== undefined ? parseFloat(config.minAngle) : -89),
        pitchAngleMax: (config.maxAngle !== undefined ? parseFloat(config.maxAngle) :  89),
        freeFly: !!freeFly
      }
    });
  } else {
    // Pas de physique : caméra seule (pas recommandé si tu veux collisions)
    cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    app.root.addChild(cameraEntity);
  }

  // Regarder vers le modèle si présent, sinon vers l’origine
  const lookTarget = modelEntity ? modelEntity.getPosition() : new pc.Vec3(0, 1, 0);
  cameraEntity.lookAt(lookTarget);

  // Taille initiale
  app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);

  // DPR dynamique : réduit pendant interaction
  const setDpr = (val) => {
    const clamped = Math.max(0.5, Math.min(val, maxDevicePixelRatio));
    if (app.graphicsDevice.maxPixelRatio !== clamped) {
      app.graphicsDevice.maxPixelRatio = clamped;
      app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight);
    }
  };
  const bumpInteraction = () => {
    setDpr(interactDpr);
    if (idleTimer) clearTimeout(idleTimer);
    idleTimer = setTimeout(() => {
      setDpr(Math.min(window.devicePixelRatio || 1, maxDevicePixelRatio));
    }, idleRestoreDelay);
  };
  ["mousedown", "mousemove", "mouseup", "wheel", "touchstart", "touchmove", "keydown"]
    .forEach((ev) => canvas.addEventListener(ev, bumpInteraction, { passive: true }));

  viewerInitialized = true;
  console.log("[VIEWER] READY — physics=", physicsEnabled ? "ON" : "OFF", "env=", !!envEntity, "sog=", !!modelEntity);
}

/* -------------------------------------------
   API helper : repositionner le joueur/caméra
-------------------------------------------- */
export function resetViewerCamera(x, y, z) {
  try {
    if (!app) return;
    const nx = (x !== undefined) ? parseFloat(x) : null;
    const ny = (y !== undefined) ? parseFloat(y) : null;
    const nz = (z !== undefined) ? parseFloat(z) : null;

    if (playerEntity && playerEntity.rigidbody) {
      const p = playerEntity.getPosition().clone();
      playerEntity.rigidbody.teleport(nx ?? p.x, ny ?? p.y, nz ?? p.z, playerEntity.getRotation());
      playerEntity.rigidbody.linearVelocity = new pc.Vec3(0, 0, 0);
      playerEntity.rigidbody.angularVelocity = new pc.Vec3(0, 0, 0);
    } else if (cameraEntity) {
      const p = cameraEntity.getPosition().clone();
      cameraEntity.setPosition(nx ?? p.x, ny ?? p.y, nz ?? p.z);
    }
  } catch (e) {
    console.error("[viewer_pr_env] resetViewerCamera error:", e);
  }
}