// main.js — DESTROYULATOR web smash toy. Orchestrates the first-person controller
// (forked from thriftgod's pointer-lock WASD), the record store room, prop loading
// from 3GOD, Rapier destruction (physics.js) and the feel layer (juice.js).
//
// Not a port of the Godot game — a shareable browser toy in the same universe,
// consuming the same 3GOD prop pipeline. Zero build step: importmap only.

import * as THREE from 'three';
import { PointerLockControls } from 'three/addons/controls/PointerLockControls.js';
import { initPhysics, createPhysics } from './physics.js';
import { loadProp, loadFractured, fetchShelf, CATALOG } from './props.js';
import { createJuice, MATERIALS } from './juice.js';

const $ = id => document.getElementById(id);
const boot = $('boot');

// ---------------- renderer / scene / camera ----------------
const canvas = $('c');
const renderer = new THREE.WebGLRenderer({ canvas, antialias: true, preserveDrawingBuffer: true });
renderer.setPixelRatio(Math.min(devicePixelRatio, 2));
renderer.outputColorSpace = THREE.SRGBColorSpace;

const scene = new THREE.Scene();
scene.background = new THREE.Color(0x2c2618);
scene.fog = new THREE.Fog(0x2c2618, 20, 46);

const camera = new THREE.PerspectiveCamera(74, 16 / 9, 0.05, 100);
camera.position.set(0, 1.65, 6);
scene.add(camera);

// Robust sizing: some hosts report innerWidth/innerHeight = 0 at load, which
// would make camera.aspect NaN and poison the projection (and the pick ray).
// Size from the canvas's laid-out box, with a sane fallback, and re-run on any
// layout change via ResizeObserver.
function viewSize() {
  const w = canvas.clientWidth || innerWidth || 1280;
  const h = canvas.clientHeight || innerHeight || 720;
  return [Math.max(1, w), Math.max(1, h)];
}
function resize() {
  const [w, h] = viewSize();
  camera.aspect = w / h; camera.updateProjectionMatrix();
  renderer.setSize(w, h, false);   // false → CSS (100%/100%) keeps controlling display size
}
resize();
addEventListener('resize', resize);
try { new ResizeObserver(resize).observe(canvas); } catch (e) {}

// lights — cheap, holds 60fps with a roomful of props
scene.add(new THREE.HemisphereLight(0xfff4e6, 0x40372a, 1.35));
const key = new THREE.DirectionalLight(0xfff6ea, 1.35); key.position.set(4, 8, 3); scene.add(key);
const fill = new THREE.PointLight(0xffe2b4, 0.9, 44); fill.position.set(-3, 3.2, 2); scene.add(fill);
const fill2 = new THREE.PointLight(0xd8e0ff, 0.55, 40); fill2.position.set(4, 3.2, -3); scene.add(fill2);

// ---------------- pointer lock + drag-to-look fallback ----------------
// Pointer Lock is the primary look control, but it's unavailable in embedded/iframe
// contexts (no allow="pointer-lock") — where it used to dead-end on the title screen.
// If the lock request is refused we fall back to DRAG-TO-LOOK so the shareable link
// always plays: hold-drag rotates, a tap still smashes.
const controls = new PointerLockControls(camera, renderer.domElement);
const startEl = $('start');
let paused = true, booted = false;

let dragLook = false;          // true once we've fallen back to manual drag-look
let lockPending = false;

function enterDragLook() {
  lockPending = false;
  dragLook = true;
  paused = false;
  startEl.classList.add('hidden');
  document.body.style.cursor = 'grab';
}
function onLockFail() { if (!controls.isLocked) enterDragLook(); }

function safeLock() {
  if (dragLook) { paused = false; startEl.classList.add('hidden'); return; }
  lockPending = true;
  try {
    const p = renderer.domElement.requestPointerLock();
    if (p && typeof p.then === 'function') p.then(() => { lockPending = false; }, onLockFail);
  } catch (e) { onLockFail(); return; }
  // watchdog: browsers that neither reject the promise nor fire pointerlockerror
  setTimeout(() => { if (lockPending && !controls.isLocked && !dragLook) onLockFail(); }, 350);
}
document.addEventListener('pointerlockerror', onLockFail);

$('goBtn').onclick = () => { if (booted) { juice.resumeAudio(); safeLock(); } };
startEl.onclick = e => { if (booted && e.target.id !== 'shareBtn') { juice.resumeAudio(); safeLock(); } };
controls.addEventListener('lock', () => { lockPending = false; paused = false; startEl.classList.add('hidden'); });
controls.addEventListener('unlock', () => { paused = true; if (!shareOpen) startEl.classList.remove('hidden'); });

// manual drag-look input (only active in the fallback mode)
let dragging = false, dragMoved = 0, lastX = 0, lastY = 0;
const LOOK_SPEED = 0.0026;
const _lookEuler = new THREE.Euler(0, 0, 0, 'YXZ');
function applyLook(dYaw, dPitch) {
  _lookEuler.setFromQuaternion(camera.quaternion);
  _lookEuler.y += dYaw;
  _lookEuler.x = Math.max(-Math.PI / 2 + 0.02, Math.min(Math.PI / 2 - 0.02, _lookEuler.x + dPitch));
  _lookEuler.z = 0;
  camera.quaternion.setFromEuler(_lookEuler);
}
renderer.domElement.addEventListener('mousedown', e => {
  if (!dragLook || e.button !== 0) return;
  dragging = true; dragMoved = 0; lastX = e.clientX; lastY = e.clientY;
  document.body.style.cursor = 'grabbing';
});
addEventListener('mousemove', e => {
  if (!dragLook || !dragging) return;
  const dx = e.clientX - lastX, dy = e.clientY - lastY;
  lastX = e.clientX; lastY = e.clientY;
  dragMoved += Math.abs(dx) + Math.abs(dy);
  applyLook(-dx * LOOK_SPEED, -dy * LOOK_SPEED);   // drag right → look right (mouse-look parity)
});
addEventListener('mouseup', e => {
  if (!dragLook || e.button !== 0) return;
  const wasDrag = dragging && dragMoved > 6;
  dragging = false;
  document.body.style.cursor = 'grab';
  if (!wasDrag) onClick();   // a tap (not a look-drag) still smashes / pulls / throws
});

// ---------------- juice ----------------
const juice = createJuice({
  camera, scene,
  dom: { canvas, combo: $('combo'), comboN: $('comboN'), comboX: $('comboX'), tallyN: $('tallyN') },
});

// ---------------- room ----------------
const ROOM = { w: 16, d: 18, h: 3.6 };
let phys = null;

const woodTex = makeGridTexture('#7a6242', '#5f4c32', 8);
const floorTex = makeGridTexture('#544636', '#463a2c', 12);

function makeGridTexture(a, b, reps) {
  const cv = document.createElement('canvas'); cv.width = cv.height = 128;
  const ctx = cv.getContext('2d');
  ctx.fillStyle = a; ctx.fillRect(0, 0, 128, 128);
  ctx.strokeStyle = b; ctx.lineWidth = 8;
  ctx.strokeRect(0, 0, 128, 128);
  const tx = new THREE.CanvasTexture(cv); tx.wrapS = tx.wrapT = THREE.RepeatWrapping;
  tx.repeat.set(reps, reps); tx.colorSpace = THREE.SRGBColorSpace;
  return tx;
}

function buildRoom() {
  const { w, d, h } = ROOM;
  const floorMat = new THREE.MeshStandardMaterial({ map: floorTex, roughness: 0.95 });
  const floor = new THREE.Mesh(new THREE.PlaneGeometry(w, d), floorMat);
  floor.rotation.x = -Math.PI / 2; scene.add(floor);

  const ceil = new THREE.Mesh(new THREE.PlaneGeometry(w, d), new THREE.MeshStandardMaterial({ color: 0x413628, roughness: 1 }));
  ceil.rotation.x = Math.PI / 2; ceil.position.y = h; scene.add(ceil);

  const wallMat = new THREE.MeshStandardMaterial({ map: woodTex, roughness: 0.9, side: THREE.FrontSide });
  const mkWall = (ww, hh, x, y, z, ry) => {
    const m = new THREE.Mesh(new THREE.PlaneGeometry(ww, hh), wallMat);
    m.position.set(x, y, z); m.rotation.y = ry; scene.add(m);
  };
  mkWall(w, h, 0, h / 2, -d / 2, 0);           // back
  mkWall(w, h, 0, h / 2, d / 2, Math.PI);      // front
  mkWall(d, h, -w / 2, h / 2, 0, Math.PI / 2); // left
  mkWall(d, h, w / 2, h / 2, 0, -Math.PI / 2); // right

  // static colliders: floor + 4 walls (thick slabs just outside the room)
  phys.addStaticBox(new THREE.Vector3(0, -0.5, 0), new THREE.Vector3(w / 2, 0.5, d / 2));
  const t = 0.5;
  phys.addStaticBox(new THREE.Vector3(0, h / 2, -d / 2 - t), new THREE.Vector3(w / 2, h, t));
  phys.addStaticBox(new THREE.Vector3(0, h / 2, d / 2 + t), new THREE.Vector3(w / 2, h, t));
  phys.addStaticBox(new THREE.Vector3(-w / 2 - t, h / 2, 0), new THREE.Vector3(t, h, d / 2));
  phys.addStaticBox(new THREE.Vector3(w / 2 + t, h / 2, 0), new THREE.Vector3(t, h, d / 2));
  phys.addStaticBox(new THREE.Vector3(0, h + t, 0), new THREE.Vector3(w / 2, t, d / 2)); // ceiling
}

// place a loaded prop clone at a world transform and register it with physics
function placeProp(scene3d, worldPos, opts = {}) {
  const g = new THREE.Group();
  g.add(scene3d);
  if (opts.rotY) g.rotation.y = opts.rotY;
  if (opts.scale) g.scale.setScalar(opts.scale);
  g.position.copy(worldPos);
  scene.add(g);
  g.userData.tintHex = (MATERIALS[opts.material] || MATERIALS.wood).particles;
  return phys.addProp(g, opts);
}

// ---------------- record ritual (lite) ----------------
// A bin of pull-able record meshes (decoration, not physics). Look at one, press
// E / click to slide it out into your hands; click again to throw + smash it.
const recordBin = { records: [], mesh: null };
let recordTemplate = null;
let held = null;              // { mesh, spin }
let pulling = null;           // { rec, t }

function buildRecordBin(pos) {
  if (!recordTemplate) return;
  const bin = new THREE.Group(); bin.position.copy(pos); scene.add(bin);
  recordBin.mesh = bin;
  const N = 9;
  for (let i = 0; i < N; i++) {
    const r = recordTemplate.clone(true);
    r.rotation.x = -0.18 + i * 0.01;           // leaned back, riffle-style
    // sit them high enough to clearly protrude above the crate lip (targetable)
    r.position.set(((i * 40503 >>> 0) % 100 - 50) / 900, 0.34, -0.14 + i * 0.05);
    bin.add(r);
    recordBin.records.push({ mesh: r, taken: false, home: r.position.clone() });
  }
}

function nearestRecord() {
  // the front-most un-taken record the ray is looking near
  for (let i = recordBin.records.length - 1; i >= 0; i--) {
    if (!recordBin.records[i].taken) return recordBin.records[i];
  }
  return null;
}

function pullRecord(rec) {
  if (!rec || rec.taken || held || pulling) return;
  rec.taken = true;
  pulling = { rec, t: 0 };
  juice.playThrow();
}

function updatePull(dt) {
  if (pulling) {
    pulling.t = Math.min(1, pulling.t + dt * 3.2);
    const e = pulling.t * pulling.t * (3 - 2 * pulling.t); // smoothstep
    const m = pulling.rec.mesh;
    // slide up out of the bin
    m.position.lerpVectors(pulling.rec.home, new THREE.Vector3(pulling.rec.home.x, 0.55, 0.25), e);
    if (pulling.t >= 1) {
      // hand it off to "held"
      recordBin.mesh.remove(m);
      m.position.set(0, 0, 0); m.rotation.set(0, 0, 0);
      scene.add(m);
      held = { mesh: m, spin: 0 };
      pulling = null;
    }
  }
  if (held) {
    held.spin += dt * 3;
    // float it in front of the camera, a touch low and off to the side (in-hand)
    const fwd = new THREE.Vector3(); camera.getWorldDirection(fwd);
    const right = new THREE.Vector3().crossVectors(fwd, camera.up).normalize();
    const pos = camera.position.clone().add(fwd.multiplyScalar(0.95)).add(right.multiplyScalar(0.22));
    pos.y -= 0.22;
    held.mesh.position.lerp(pos, Math.min(1, dt * 18));
    held.mesh.rotation.y = held.spin;
    held.mesh.rotation.x = -0.35;
  }
}

function throwHeld() {
  if (!held) return;
  const fwd = new THREE.Vector3(); camera.getWorldDirection(fwd);
  const start = held.mesh.position.clone();
  scene.remove(held.mesh);
  // spawn a real physics record at the throw point
  const g = new THREE.Group(); g.add(held.mesh);
  held.mesh.position.set(0, 0, 0); held.mesh.rotation.set(0, 0, 0);
  g.position.copy(start); scene.add(g);
  g.userData.tintHex = MATERIALS.vinyl.particles;
  const prop = phys.addProp(g, { material: 'vinyl', kind: 'record', brittle: true, mass: 0.3, fractured: fracturedTemplates.record });
  const speed = 13;
  prop.body.setLinvel({ x: fwd.x * speed, y: fwd.y * speed + 1.2, z: fwd.z * speed }, true);
  prop.body.setAngvel({ x: (Math.random() - 0.5) * 20, y: (Math.random() - 0.5) * 20, z: (Math.random() - 0.5) * 20 }, true);
  held = null;
  juice.playThrow();
}

// ---------------- interaction (center ray) ----------------
const ray = new THREE.Raycaster();
const cross = $('cross');
const _fwd = new THREE.Vector3();
let lookProp = null, lookRecord = false;

function updateLook() {
  if (paused) return;
  camera.updateMatrixWorld();            // cast from where the camera is THIS frame
  ray.setFromCamera({ x: 0, y: 0 }, camera);
  const hits = ray.intersectObjects(scene.children, true);
  lookProp = null; lookRecord = false;
  for (const h of hits) {
    if (h.distance > 4.2) break;
    // a pull-able record in the bin?
    let o = h.object, rec = null;
    while (o) { if (o.userData && o.userData.__binRec) { rec = o.userData.__binRec; break; } o = o.parent; }
    if (rec && !rec.taken) { lookRecord = true; break; }
    const prop = phys.propAt(h.object);
    if (prop && !prop.smashed) { lookProp = prop; break; }
  }
  const wantHand = lookRecord || !!lookProp || !!held;
  cross.classList.toggle('hand', wantHand);
}

function smashProp(prop, power = 1.1) {
  if (!prop || prop.smashed) return;
  camera.getWorldDirection(_fwd);
  const dir = { x: _fwd.x, y: 0, z: _fwd.z };
  const t = prop.body.translation();
  const wp = new THREE.Vector3(t.x + prop.center.x, t.y + prop.center.y, t.z + prop.center.z);

  // the printer BOSS soaks several hits (rocks + juices), then bursts into its GLB chunks.
  // Placed non-shatterable so a topple can't auto-break it before the final blow lands.
  if (prop.isBoss && prop.bossHits > 1) {
    prop.bossHits--;
    juice.smash(wp, prop.material, power);
    phys.knock(prop, dir, power * 0.5);
    return;
  }
  juice.smash(wp, prop.material, prop.isBoss ? 1.9 : power);   // boss dies loud
  if (prop.kind === 'rack') {
    phys.knock(prop, dir, power);                 // topple the support → dependents pancake
  } else if (prop.shatterable || prop.isBoss) {
    phys.shatter(prop, dir, prop.isBoss ? power * 1.6 : power); // crate / bin / record / boss → chunks
  } else {
    phys.knock(prop, dir, power);                 // cashbot / mpc → comedic topple + steel ring
  }
}

function onClick() {
  if (paused || !booted) return;
  if (held) { throwHeld(); return; }
  if (lookRecord) { pullRecord(nearestRecord()); return; }
  if (lookProp) { smashProp(lookProp, 1.15); return; }
}
// pointer-lock mode: a click is a smash. In drag-look mode the drag handlers own the
// mouse (a tap → onClick on mouseup), so skip here to avoid a double-fire.
addEventListener('mousedown', e => { if (e.button === 0 && !dragLook) onClick(); });
addEventListener('keydown', e => {
  if (e.code === 'KeyE') { if (held) throwHeld(); else if (lookRecord) pullRecord(nearestRecord()); }
});

// ---------------- movement (thriftgod loop) ----------------
const keys = {};
addEventListener('keydown', e => { keys[e.code] = true; });
addEventListener('keyup', e => { keys[e.code] = false; });
const vel = new THREE.Vector3();
const lastJitter = new THREE.Vector3();

function move(dt) {
  const sp = 3.4 * dt;
  const R = keys.KeyD || keys.ArrowRight, Le = keys.KeyA || keys.ArrowLeft,
        Bk = keys.KeyS || keys.ArrowDown, Fw = keys.KeyW || keys.ArrowUp;
  vel.set((R ? 1 : 0) - (Le ? 1 : 0), 0, (Bk ? 1 : 0) - (Fw ? 1 : 0));
  if (vel.lengthSq()) {
    vel.normalize();
    controls.moveRight(vel.x * sp); controls.moveForward(-vel.z * sp);
  }
  // keep the player inside the room
  const m = 0.35;
  camera.position.x = Math.max(-ROOM.w / 2 + m, Math.min(ROOM.w / 2 - m, camera.position.x));
  camera.position.z = Math.max(-ROOM.d / 2 + m, Math.min(ROOM.d / 2 - m, camera.position.z));
  camera.position.y = 1.65;
}

// ---------------- share-your-mess ----------------
let shareOpen = false;
$('shareBtn').onclick = openShare;
$('shareClose').onclick = closeShare;
function openShare() {
  render();                                   // ensure the buffer is fresh
  const url = renderer.domElement.toDataURL('image/png');
  $('shareImg').src = url;
  $('shareDl').href = url;
  const n = juice.totalSmashed;
  $('shareCap').innerHTML = n > 0
    ? `You put <b>${n}</b> ${n === 1 ? 'thing' : 'things'} through it. The staff will not be pleased.`
    : `A suspiciously tidy record store. Go break something.`;
  $('share').style.display = 'flex';
  shareOpen = true;
  if (controls.isLocked) document.exitPointerLock();
}
function closeShare() { $('share').style.display = 'none'; shareOpen = false; startEl.classList.remove('hidden'); }

// ---------------- boot ----------------
const fracturedTemplates = {};   // id -> fractured Object3D (from Lane 2, if shipped)

async function build() {
  boot.textContent = 'starting physics…';
  await initPhysics();
  phys = createPhysics(scene);
  phys.setSmashHandler((prop, wp, power, shattered) => {
    // a real impact fired by the sim (thrown record hits a wall, crate slams floor)
    juice.smash(wp, prop.material, power);
  });

  buildRoom();

  boot.textContent = 'loading props from 3GOD…';
  // core smashables (local mirror, always present)
  const [recordRes, crateRes, rackRes] = await Promise.all([
    loadProp('record'), loadProp('crate'), loadProp('rack'),
  ]);
  recordTemplate = recordRes ? recordRes.scene : null;

  // try to pull a pre-fractured record from Lane 2's pipeline (graceful if absent)
  try { fracturedTemplates.record = await loadFractured('record'); } catch (e) {}

  layoutRoom({ crateRes, rackRes });

  // Lane 2 hero props: the printer BOSS + workplace set dressing, with real fractured
  // chunk destruction. Awaited so the boss is present the instant play starts.
  boot.textContent = 'wheeling in the printer…';
  await loadHeroProps();

  // flavor props from the live depot (local fallback for cashbot/bin; others optional)
  loadDepotFlavor();

  // a little "N on the shelf" readout, best-effort
  fetchShelf().then(list => { if (list.length) boot.dataset.shelf = list.length; });

  booted = true;
  boot.textContent = 'ready — click to wreck';
  requestAnimationFrame(tick);
}

function layoutRoom({ crateRes, rackRes }) {
  const { w, d } = ROOM;

  // racks along the back wall — fixed supports holding crates that pancake
  if (rackRes) {
    for (let i = -1; i <= 1; i++) {
      const rackClone = i === -1 ? rackRes.scene : rackRes.scene.clone(true);
      const rack = placeProp(rackClone, new THREE.Vector3(i * 4.2, 0, -d / 2 + 1.4),
        { material: 'wood', kind: 'rack', fixed: true, rotY: 0 });
      // stack two crates on each rack; smashing the rack drops them
      if (crateRes) {
        for (let k = 0; k < 2; k++) {
          const crate = placeProp(crateRes.scene.clone(true),
            new THREE.Vector3(i * 4.2 - 0.2 + k * 0.4, 0.82 + k * 0.34, -d / 2 + 1.4),
            { material: 'wood', kind: 'crate', fixed: true });
          phys.support(rack, crate);
        }
      }
    }
  }

  // a pyramid of crates mid-floor to smash + topple
  if (crateRes) {
    const base = new THREE.Vector3(-3.5, 0, 1);
    const rows = [3, 2, 1];
    let y = 0;
    const placed = [];
    rows.forEach((count, row) => {
      const layer = [];
      for (let c = 0; c < count; c++) {
        const x = base.x + (c - (count - 1) / 2) * 0.4 + row * 0.2;
        const cr = placeProp(crateRes.scene.clone(true), new THREE.Vector3(x, y, base.z),
          { material: 'wood', kind: 'crate', fixed: true });   // held until the base is smashed
        layer.push(cr);
      }
      // link support: each upper crate rests on the layer below
      if (placed.length) layer.forEach(up => placed[placed.length - 1].forEach(dn => phys.support(dn, up)));
      placed.push(layer);
      y += 0.34;
    });
    // a few loose floor crates to knock around
    [[3.5, 2.2], [4.5, 0.5], [2.6, -1.5]].forEach(([x, z]) =>
      placeProp(crateRes.scene.clone(true), new THREE.Vector3(x, 0, z), { material: 'wood', kind: 'crate', fixed: true }));
  }

  // the record bin you riffle + pull from
  if (recordTemplate) {
    buildRecordBin(new THREE.Vector3(0.5, 0, 3.2));
    // tag bin records so the ray can find them
    recordBin.records.forEach(rec => rec.mesh.traverse(o => { o.userData.__binRec = rec; }));
    // an OPEN-TOP wooden crate around them, so records protrude and stay
    // targetable from above (a solid box would occlude them)
    const shellMat = new THREE.MeshStandardMaterial({ map: woodTex, roughness: 0.9 });
    const crate = new THREE.Group(); crate.position.set(0.5, 0, 3.2);
    const CW = 0.72, CH = 0.34, TH = 0.04;
    const wall = (w, h, d, x, y, z) => { const m = new THREE.Mesh(new THREE.BoxGeometry(w, h, d), shellMat); m.position.set(x, y, z); crate.add(m); };
    wall(CW, TH, CW, 0, TH / 2, 0);                 // floor
    wall(CW, CH, TH, 0, CH / 2, -CW / 2 + TH / 2);  // back
    wall(CW, CH, TH, 0, CH / 2, CW / 2 - TH / 2);   // front
    wall(TH, CH, CW, -CW / 2 + TH / 2, CH / 2, 0);  // left
    wall(TH, CH, CW, CW / 2 - TH / 2, CH / 2, 0);   // right
    scene.add(crate);
  }
}

// Lane 2's hero props — the printer boss + a little office set dressing, each with its
// pre-fractured template so a smash spawns real GLB chunks (not generative cubes). GLBs
// have origin at floor-centre (pipeline contract), so y=0 sits them on the floor.
async function loadHeroProps() {
  const heroes = [
    { id: 'office-printer', pos: [0, 0, -3.0], rotY: 0.0, boss: true },
    { id: 'office-desk',    pos: [2.4, 0, -3.3], rotY: -0.5 },
    { id: 'crt-monitor',    pos: [-2.4, 0, -3.0], rotY: 0.4 },
    { id: 'filing-cabinet', pos: [-5.5, 0, -2.4], rotY: 0.2 },
    { id: 'water-cooler',   pos: [5.5, 0, -2.0], rotY: -0.3 },
  ];
  for (const h of heroes) {
    try {
      const res = await loadProp(h.id);
      if (!res) continue;
      let fractured = null;
      try { fractured = await loadFractured(h.id); } catch (e) {}
      const def = CATALOG[h.id];
      const prop = placeProp(res.scene, new THREE.Vector3(h.pos[0], h.pos[1], h.pos[2]), {
        material: def.material, kind: def.kind, fixed: true, rotY: h.rotY,
        brittle: !!def.brittle,
        // boss stays non-shatterable so a topple can't break it early; smashProp shatters it
        shatterable: !h.boss, fractured,
      });
      if (prop && h.boss) { prop.isBoss = true; prop.bossHits = 4; }
    } catch (e) { /* hero prop unavailable (offline, no mirror) — skip gracefully */ }
  }
}

async function loadDepotFlavor() {
  // positions kept clear of the back-wall racks (x∈{-4.2,0,4.2}, z≈-7.6),
  // the mid pyramid (≈-3.5,1) and the record bin (0.5,3.2)
  const flavor = [
    { id: 'cashbot', pos: [-6, 0, 5.5], material: 'steel', rotY: 0.6 },  // greeter by the door
    { id: 'bin',     pos: [-w2() + 1.0, 0, -1.5], material: 'steel' },
    { id: 'bin',     pos: [w2() - 1.0, 0, 3.5], material: 'steel' },
    { id: 'mpc',     pos: [6, 0, 0], material: 'steel' },
    { id: 'gameboy', pos: [-6, 0, -3.5], material: 'cardboard' },
  ];
  for (const f of flavor) {
    try {
      const res = await loadProp(f.id);
      if (!res) continue;
      const def = CATALOG[f.id];
      placeProp(res.scene, new THREE.Vector3(f.pos[0], f.pos[1], f.pos[2]),
        { material: f.material || def.material, kind: def.kind, scale: f.scale, rotY: f.rotY, fixed: true });
    } catch (e) { /* depot prop unavailable — skip gracefully */ }
  }
}
function w2() { return ROOM.w / 2; }
function d2() { return ROOM.d / 2; }

// ---------------- main loop ----------------
const clock = new THREE.Clock();
let frame = 0;

function render() { renderer.render(scene, camera); }

function stepFrame(dt) {
  // undo last frame's camera shake offset before moving (keeps movement authoritative)
  camera.position.sub(lastJitter);

  if (!paused && !shareOpen) move(dt);

  updatePull(dt);
  if (++frame % 4 === 0) updateLook();

  phys.step(dt, juice.frozen());
  juice.update(dt);

  // re-apply camera shake for this frame
  lastJitter.copy(juice.camJitter);
  camera.position.add(lastJitter);

  render();
}

function tick() {
  requestAnimationFrame(tick);
  stepFrame(Math.min(clock.getDelta(), 0.05));
}

// Debug handle, only attached with ?debug — lets you drive the sim without a
// Pointer Lock (e.g. embedded frames / headless smoke tests) and step it by hand.
if (location.search.includes('debug')) {
  window.DESTROY = {
    get scene() { return scene; }, get camera() { return camera; }, get phys() { return phys; }, juice,
    unpause() { paused = false; startEl.classList.add('hidden'); },
    look(yaw, pitch = 0) { camera.rotation.set(pitch, yaw, 0, 'YXZ'); },
    teleport(x, y, z) { camera.position.set(x, y, z); lastJitter.set(0, 0, 0); },
    aimSmash() { updateLook(); if (lookProp) { smashProp(lookProp, 1.2); return lookProp.kind; } return null; },
    pull() { updateLook(); if (lookRecord) { pullRecord(nearestRecord()); return 'pulling'; } return 'no record in view'; },
    throwR() { const had = !!held; throwHeld(); return had ? 'thrown' : 'nothing held'; },
    sim(n = 60, dt = 1 / 60) { for (let i = 0; i < n; i++) stepFrame(dt); return this.state(); },
    counts() { return { props: phys && phys.propCount, debris: phys && phys.debrisCount, smashed: juice.totalSmashed }; },
    state() { return { held: !!held, pulling: !!pulling, recordsLeft: recordBin.records.filter(r => !r.taken).length }; },
  };
}

// kick it off
build().catch(err => { boot.textContent = 'boot error: ' + (err && err.message || err); console.error(err); });