// TURNCRAFT — integration entry point (docs/INTEGRATION.md).
// Wires the five lanes: engine (A), player (B), worldgen (C),
// machines/interaction (D), audio/fx/ui (E).

import { PointLight, type Object3D, type PerspectiveCamera } from 'three';
import { FIXED_DT, MAX_SUBSTEPS } from './core/constants';
import { createRenderer, VoxelWorld, ChunkManager } from './engine';
import { WORLD_X, WORLD_Y, WORLD_Z } from './core/constants';
import { buildBooth, SPAWN, QUEST_POS, MIXER } from './worldgen';
import { createMachines, type QuestPositions } from './machines';
import { Interaction, Hotbar } from './interact';
import { PlayerController } from './player';
import { AudioEngine } from './audio/AudioEngine';
import { FxSystem } from './fx/FxSystem';
import { DecalSet } from './fx/decals';
import { Hud } from './ui/Hud';
import { Menu, QUALITY_PIXEL_RATIO } from './ui/Menu';
import { Roster } from './ui/Roster';
import { Avatars, EMOTE } from './net/Avatars';
import { NetClient, relayUrl } from './net/NetClient';
import { bus } from './core/events';
import { QUEST_ITEMS } from './machines/quest';

const container = document.getElementById('app')!;
container.innerHTML = '';

// 1–2. Renderer + world. createRenderer builds THE atlas; ChunkManager must
// share it so setEmissiveBoost reaches the chunk materials (Lane A handoff).
const { renderer, scene, camera, atlas, setEmissiveBoost, setBloom, render } = createRenderer(container);
const world = new VoxelWorld(WORLD_X, WORLD_Y, WORLD_Z);

// 3–4. Build the booth, then mesh it.
const t0 = performance.now();
buildBooth(world);
const chunks = new ChunkManager(world, scene, atlas, 4);
chunks.buildAll();
console.info(
  `[turncraft] booth built+meshed in ${(performance.now() - t0).toFixed(0)} ms, ` +
  `${chunks.meshCount} chunk meshes`,
);

// 5. Machines, with Lane C's real quest positions adapted to Lane D's shape
// (the two lanes defined QuestPositions independently; C's is nested per-node,
// D's is flat + a crossfader slot span derived from C's MIXER anchors).
const questPos: QuestPositions = {
  stylusSocket: QUEST_POS.stylus.socket,
  rcaPlug: QUEST_POS.rca.plug,
  rcaSocket: QUEST_POS.rca.socket,
  crossfaderSlot: {
    min: [MIXER.centerX - MIXER.crossfaderHalfLen, MIXER.faceTopY - MIXER.crossfaderDepth + 1, MIXER.crossfaderZ - 1],
    max: [MIXER.centerX + MIXER.crossfaderHalfLen, MIXER.faceTopY - 1, MIXER.crossfaderZ + 2],
  },
  fuseBox: QUEST_POS.fuse.box,
  masterSwitch: QUEST_POS.power.switch,
};
const machines = createMachines(world, questPos);
for (const o of machines.getObject3Ds()) scene.add(o as Object3D);

// Glow-Up G3: screen-print decals (labels, socket numbers, party flyers) baked
// onto thin proud planes over the static gear. Purely cosmetic, built once.
const decals = new DecalSet();
scene.add(decals.group);

// Warm light pools under the six ceiling lamp panels worldgen places
// (buildShell); positions must match its [112,224,336] × [70,160] grid.
for (const lx of [112, 224, 336]) {
  for (const lz of [70, 160]) {
    const lamp = new PointLight(0xffd9a6, 900, 0, 1.9);
    lamp.position.set(lx, 136, lz);
    scene.add(lamp);
  }
}

// 6 (+6.5). Player, then give machines the player view (walk-push faders,
// walk-press buttons — Lane D handoff friction #2).
const player = new PlayerController(world, {
  getColliders: machines.getColliders,
  camera: camera as PerspectiveCamera,
  domElement: renderer.domElement,
  spawn: SPAWN,
});
machines.attachPlayer(player);

// 7. Interaction + hotbar.
const hotbar = new Hotbar();
const interaction = new Interaction(world, player, machines, hotbar);
scene.add(interaction.getObject3D());

// 8. Audio, FX, HUD. AudioEngine/FxSystem/Hud self-wire to the bus; audio
// starts only from the HUD's start-splash click (autoplay policy).
const audio = new AudioEngine();
const fx = new FxSystem({ scene, setEmissiveBoost, getLevels: () => audio.getLevels() });

// Broken-node spark beacons: each unrepaired quest fixture crackles — the
// world itself points at what's broken (first-five-minutes pass).
const cs = questPos.crossfaderSlot;
fx.setBeacons(
  [
    { node: 'stylus', pos: questPos.stylusSocket as [number, number, number] },
    { node: 'rca', pos: questPos.rcaPlug as [number, number, number] },
    { node: 'crossfader', pos: [(cs.min[0] + cs.max[0]) / 2, cs.max[1] + 1, (cs.min[2] + cs.max[2]) / 2] },
    { node: 'fuse', pos: questPos.fuseBox as [number, number, number] },
    { node: 'power', pos: questPos.masterSwitch as [number, number, number] },
  ],
  (n) => machines.quest.isRepaired(n as Parameters<typeof machines.quest.isRepaired>[0]),
);

// First-visit flythrough: nine skippable seconds that teach the premise
// ("you are tiny, this is a DJ booth") better than any text could. Rides
// the same cine override the loop already applies; any click/key skips.
const FLY_KEY = 'turncraft.flown';
function runFlythrough(): void {
  if (localStorage.getItem(FLY_KEY)) return;
  localStorage.setItem(FLY_KEY, '1');
  const K: Array<{ t: number; pos: number[]; look: number[] }> = [
    { t: 0.0, pos: [224, 132, 26], look: [224, 60, 128] },   // wide: the whole booth
    { t: 3.2, pos: [330, 100, 60], look: [224, 66, 100] },   // sweep over the mixer
    { t: 6.0, pos: [140, 96, 60], look: [80, 81, 96] },      // deck A, the blue record
    { t: 9.0, pos: [SPAWN[0], SPAWN[1] + 1.62, SPAWN[2]], look: [80, 81, 96] }, // land at spawn
  ];
  const w = window as unknown as { TURNCRAFT_CINE: { pos: number[]; look: number[] } | null };
  const t0 = performance.now();
  let done = false;
  const finish = () => {
    if (done) return;
    done = true;
    w.TURNCRAFT_CINE = null;
    window.removeEventListener('mousedown', finish);
    window.removeEventListener('keydown', finish);
  };
  window.addEventListener('mousedown', finish);
  window.addEventListener('keydown', finish);
  const tick = () => {
    if (done) return;
    const t = (performance.now() - t0) / 1000;
    if (t >= K[K.length - 1].t) { finish(); return; }
    let i = 0;
    while (i < K.length - 2 && t >= K[i + 1].t) i++;
    const a = K[i], b = K[i + 1];
    const f = Math.min(1, Math.max(0, (t - a.t) / (b.t - a.t)));
    const e = f * f * (3 - 2 * f); // smoothstep
    w.TURNCRAFT_CINE = {
      pos: a.pos.map((v, k) => v + (b.pos[k] - v) * e),
      look: a.look.map((v, k) => v + (b.look[k] - v) * e),
    };
    requestAnimationFrame(tick);
  };
  requestAnimationFrame(tick);
}

const hud = new Hud({
  onStart: () => {
    void audio.init();
    renderer.domElement.requestPointerLock();
    runFlythrough();
  },
  onResume: () => { renderer.domElement.requestPointerLock(); },
  getHotbar: () => hotbar, // D's Hotbar structurally satisfies E's HotbarModel
});
hotbar.onChange(() => hud.refreshHotbar());

let started = false;

// Help & Settings (H). Applies persisted settings on construction.
const menu = new Menu({
  onApply: (s) => {
    audio.setMasterVolume(s.volume);
    player.setSensitivity(0.0022 * s.sensitivity);
    player.viewBob = s.viewBob;
    renderer.setPixelRatio(Math.min(window.devicePixelRatio, QUALITY_PIXEL_RATIO[s.quality]));
    setBloom(s.bloom && s.quality !== 'fast'); // Glow-Up G2: LED bloom, off on 'fast'
  },
  onOpen: () => { document.exitPointerLock(); hud.setPaused(false); },
  onClose: () => { if (started) renderer.domElement.requestPointerLock(); },
  // Avatar edits apply live: push to the relay and update our own roster row.
  onAvatar: (look) => {
    net?.setAvatar(look);
    roster?.setSelf({ name: menu.getSettings().name, look });
  },
});

document.addEventListener('pointerlockchange', () => {
  const locked = document.pointerLockElement === renderer.domElement;
  if (locked) started = true;
  else if (started && !menu.isOpen()) hud.setPaused(true);
});

// Multiplayer: shared booth via the relay (server/relay.mjs). Fully optional —
// if the relay is unreachable this is a normal single-player session.
const avatars = new Avatars(scene);
const netChip = document.createElement('div');
netChip.style.cssText =
  'position:fixed;top:10px;left:150px;z-index:40;font:11px ui-monospace,monospace;' +
  'color:#8a8378;background:#0008;border:1px solid #3a352c;border-radius:6px;padding:4px 8px;display:none';
document.body.appendChild(netChip);
// Who's-here list (hold Tab). Seeded with the local DJ; peers arrive from net.
const roster = new Roster({ name: menu.getSettings().name, look: menu.getSettings().avatar });

const net = new NetClient({
  world, machines, player, avatars,
  name: menu.getSettings().name,
  avatar: menu.getSettings().avatar,
  url: relayUrl(import.meta.env.BASE_URL),
  onStatus: (peerCount, connected) => {
    netChip.style.display = connected ? 'block' : 'none';
    netChip.textContent = peerCount === 0
      ? 'online — booth to yourself'
      : `online — ${peerCount} other DJ${peerCount === 1 ? '' : 's'} in the booth`;
  },
  onPeers: (peers) => roster.setPeers(peers),
});

// Interaction input (mouse buttons + E + hotbar keys), gated on pointer lock
// like Lane B's movement keys.
const locked = () => document.pointerLockElement === renderer.domElement;
renderer.domElement.addEventListener('contextmenu', (e) => e.preventDefault());
renderer.domElement.addEventListener('mousedown', (e) => {
  if (!locked()) return;
  if (e.button === 0) interaction.startMining();
  else if (e.button === 2) interaction.place();
});
window.addEventListener('mouseup', (e) => { if (e.button === 0) interaction.stopMining(); });
window.addEventListener('keydown', (e) => {
  if (!locked()) return;
  if (e.code === 'ShiftLeft' || e.code === 'ShiftRight') interaction.shiftDown = true;
  if (e.code === 'KeyE') { if (!e.repeat) interaction.useDown(e.shiftKey); } // E press (hold = crimp/torque)
  else if (e.code === 'KeyQ') interaction.dropCarry();                       // drop a carried wire
  else if (EMOTE_KEYS[e.code] !== undefined) { if (!e.repeat) fireEmote(EMOTE_KEYS[e.code]); }
  else if (e.code.startsWith('Digit')) {
    const n = parseInt(e.code.slice(5), 10);
    if (n >= 1 && n <= 9) hotbar.setActive(n - 1);
  }
});

// ── The Reset Ritual (SOCIAL_RESET Feature 3) ─────────────────────────────
// Once the mix is live, the fuse in the PCB-Depths box becomes the way to play
// the quest again — but only on a deliberate 5 s hold, and only after a
// cooldown. The relay is the authority; this is the ceremony around it.
const FUSE_HOLD_SECS = 5;
const RESET_COOLDOWN_MS = 10 * 60_000; // must match relay.mjs
let wonAt = 0;
bus.on('game:win', () => { wonAt = Date.now(); });
bus.on('quest:reset', () => { wonAt = 0; });

const fuse = QUEST_POS.fuse.box;
interaction.setBreakGuard({
  timeFor: (x, y, z) => {
    // Only the fuse voxel, and only while the booth is actually won.
    if (!machines.quest.isWon()) return null;
    if (x !== fuse[0] || y !== fuse[1] || z !== fuse[2]) return null;
    return FUSE_HOLD_SECS;
  },
  // Reuse the workshop's radial meter as the "are you sure" dial.
  progress: (p) => {
    if (p < 0) hud.hideTorque();
    else hud.showTorque(p, 'KEEP MINING TO KILL THE MIX — EVERYONE STARTS OVER');
  },
  onComplete: () => {
    if (Date.now() - wonAt < RESET_COOLDOWN_MS) {
      // The relay would reject this anyway — say so and don't eat the fuse.
      bus.emit('workshop:msg', { text: 'the fuse is still hot — give it a minute' });
      return true; // veto the break
    }
    net.sendReset(); // relay validates + broadcasts; everyone resets together
    return false;    // let the fuse actually break
  },
});

// The one block edit the reset writes: a fresh blackened fuse back in the box,
// so the quest is physically replayable. Player builds are untouched.
bus.on('quest:reset', ({ by }) => {
  world.setBlock(fuse[0], fuse[1], fuse[2], QUEST_ITEMS.fuse);
  hud.hideTorque();
  hud.showSubtitle(by ? `⚡ ${by} BLEW THE FUSE` : '⚡ THE FUSE IS BLOWN');
});

// ── Social: emotes (SOCIAL_RESET Feature 2) ───────────────────────────────
// Z X C V, pointer-locked only so they can't collide with the hotbar digits.
const EMOTE_KEYS: Record<string, number> = {
  KeyZ: EMOTE.WAVE, KeyX: EMOTE.NOD, KeyC: EMOTE.POINT, KeyV: EMOTE.AIRHORN,
};
const EMOTE_LABEL = ['👋 wave', '🎧 nod', '👉 point', '📢 airhorn'];
const emoteToast = document.createElement('div');
emoteToast.style.cssText =
  'position:fixed;left:50%;bottom:96px;transform:translateX(-50%);z-index:35;' +
  'font:12px ui-monospace,monospace;color:#ffe9c0;background:#000a;border:1px solid #4a4234;' +
  'border-radius:6px;padding:4px 10px;opacity:0;transition:opacity .18s;pointer-events:none';
document.body.appendChild(emoteToast);
let emoteToastTimer = 0;

function fireEmote(kind: number): void {
  // The relay enforces the same 4 s ceiling; if our own cooldown ate it, stay
  // silent locally too so what we hear matches what peers actually get.
  if (!net.sendEmote(kind)) {
    showEmoteToast('… still catching your breath');
    return;
  }
  // First person: you can't see your own wave, so the sound (airhorn) plus this
  // toast are the "something happened". Audio + FX listen on the bus.
  bus.emit('player:emote', { kind, self: true, at: [...player.position] as [number, number, number] });
  showEmoteToast(EMOTE_LABEL[kind] ?? '');
}

function showEmoteToast(text: string): void {
  emoteToast.textContent = text;
  emoteToast.style.opacity = '1';
  clearTimeout(emoteToastTimer);
  emoteToastTimer = window.setTimeout(() => { emoteToast.style.opacity = '0'; }, 900);
}
window.addEventListener('keyup', (e) => {
  if (e.code === 'ShiftLeft' || e.code === 'ShiftRight') interaction.shiftDown = false;
  if (e.code === 'KeyE') interaction.useUp(); // release ends any crimp/torque hold
});
window.addEventListener('wheel', (e) => {
  if (locked()) hotbar.setActive(hotbar.active + (e.deltaY > 0 ? 1 : -1));
});

// 9. Fixed-step loop, render decoupled.
let last = performance.now();
let acc = 0;
function frame(now: number): void {
  requestAnimationFrame(frame);
  acc += Math.min((now - last) / 1000, 0.25); // clamp huge tab-switch gaps
  last = now;
  let steps = 0;
  while (acc >= FIXED_DT && steps < MAX_SUBSTEPS) {
    machines.update(FIXED_DT);
    player.jumpScale = machines.workshop.isCarrying() !== null ? 0.5 : 1; // wire tug caps jump
    player.update(FIXED_DT);
    interaction.update(FIXED_DT);
    fx.update(FIXED_DT);
    avatars.update(FIXED_DT);
    acc -= FIXED_DT;
    steps++;
  }
  if (steps === MAX_SUBSTEPS) acc = 0; // don't spiral after long stalls
  audio.updateListener(player);
  // Dev/trailer cinematic override: window.TURNCRAFT_CINE = { pos, look }
  // detaches the camera from the player until set back to null.
  const cine = (window as unknown as { TURNCRAFT_CINE?: { pos: number[]; look: number[] } }).TURNCRAFT_CINE;
  if (cine) {
    camera.position.set(cine.pos[0], cine.pos[1], cine.pos[2]);
    camera.lookAt(cine.look[0], cine.look[1], cine.look[2]);
  }
  chunks.update();
  render();
}
requestAnimationFrame(frame);

// Dev/debug handle (also used by the integration smoke tests).
declare global {
  interface Window { TURNCRAFT: unknown }
}
window.TURNCRAFT = { world, player, machines, quest: machines.quest, hotbar, audio, fx, hud, chunks, interaction, camera, render, net, avatars, setBloom, setEmissiveBoost, decals };