/**
 * FKTRY main loop — ORCHESTRATOR-OWNED wiring. Lanes do not edit.
 * Fixed-timestep sim (30 tps) + interpolated render + event fan-out.
 */
import { TICKS_PER_SECOND, type Command, type Dir, type GameData, type SelectionState, type UIBus } from './contracts';
import { createSim } from './sim';
import { createRenderer } from './render';
import { createUI } from './ui';
import { createScreenFX } from './screen';
import { createAudioFX, getRadio } from './audio';

import items from '../data/items.json';
import machines from '../data/machines.json';
import recipes from '../data/recipes.json';
import tech from '../data/tech.json';
import commissions from '../data/commissions.json';
import seams from '../data/seams.json';

const data = { items, machines, recipes, tech, commissions, seams } as unknown as GameData;

const sim = createSim();
const renderer = createRenderer();
const ui = createUI();
const screen = createScreenFX();
const audio = createAudioFX();

/**
 * Radio → RadioControl adapter (round-5 review fix: the dial drove nothing).
 * Two problems it solves, both integration seams between LANE-SCREEN's engine and
 * LANE-UI's dock:
 *  1. TIMING — the dock resolves its control ONCE, inside ui.init(), before any user
 *     gesture has built the audio graph. This adapter EXISTS immediately (so the
 *     init-time probe finds a real subscribe()) and lazily attaches to the engine
 *     when the first gesture creates it, replaying state to subscribers.
 *  2. SHAPE + UNITS — UI speaks RadioControl {setFrequency(MHz), volume(), mute(),
 *     state.freqMHz, state.station:name}; the engine speaks Radio {setFrequency(native
 *     kHz for AM/SW), setVolume(), setMuted(), state.frequency, state.locked:id}.
 */
function createSpeakerAdapter() {
  type EngineRadio = NonNullable<ReturnType<typeof getRadio>>;
  let engine: EngineRadio | null = null;
  let names = new Map<string, string>();
  const subs = new Set<(s: any) => void>();
  // pre-engine local state so the dock behaves before the first gesture
  let local = { freqMHz: 88.0, band: 'FM' as 'AM' | 'FM' | 'SW', volume: 0.7, muted: false, station: null as string | null };

  const toMHz = (band: string, f: number) => (band === 'FM' ? f : f / 1000);
  const toNative = (band: string, mhz: number) => (band === 'FM' ? mhz : mhz * 1000);
  const translate = (s: any) => ({
    freqMHz: toMHz(s.band, s.frequency),
    band: s.band,
    volume: s.volume,
    muted: s.muted,
    station: s.locked ? (names.get(s.locked) ?? s.locked) : null,
  });

  const control = {
    setFrequency(mhz: number) {
      local.freqMHz = mhz;
      if (engine) engine.setFrequency(toNative(engine.getState().band, mhz));
      else notifyLocal();
    },
    setBand(band: 'AM' | 'FM' | 'SW') {
      local.band = band;
      if (engine) engine.setBand(band);
      else notifyLocal();
    },
    volume(v: number) {
      local.volume = Math.max(0, Math.min(1, v));
      if (engine) engine.setVolume(local.volume);
      else notifyLocal();
    },
    mute(on: boolean) {
      local.muted = on;
      if (engine) engine.setMuted(on);
      else notifyLocal();
    },
    getState() {
      return engine ? translate(engine.getState()) : { ...local };
    },
    subscribe(cb: (s: any) => void) {
      subs.add(cb);
      cb(control.getState());
      return () => subs.delete(cb);
    },
    /** v8: station tick marks for the dial — engine truth, MHz units, empty pre-gesture */
    listStations() {
      return engine
        ? engine.listStations().map((st) => ({ ...st, freqMHz: toMHz(st.band, st.freq) }))
        : [];
    },
  };
  function notifyLocal() { for (const cb of subs) cb({ ...local }); }

  return {
    control,
    attach() {
      const r = getRadio();
      if (!r || engine) return;
      engine = r;
      names = new Map(r.listStations().map((s) => [s.id, s.name]));
      // carry any pre-gesture dial fiddling into the engine
      r.setBand(local.band);
      r.setFrequency(toNative(local.band, local.freqMHz));
      r.setVolume(local.volume);
      r.setMuted(local.muted);
      r.subscribe((s) => { const t = translate(s); for (const cb of subs) cb(t); });
    },
  };
}
const speaker = createSpeakerAdapter();

// v4 bridge: _sel keeps the legacy {def,dir} shape (including the deprecated
// '__remove' sentinel) so unmigrated lanes keep working; selection()/setSelection()
// are the typed protocol. The sentinel path is deleted in v5.
const bus: UIBus & { _sel: { def: string; dir: Dir } | null; _state: SelectionState } = {
  _sel: null,   // legacy mirror (build/remove only) — served for selectedBuild() compat
  _state: null, // v5: typed truth, carries inspect mode
  dispatch: (cmd: Command) => sim.enqueue(cmd),
  selectedBuild: () => bus._sel,
  pickTile: (x, y) => renderer.pickTile(x, y),
  selection: (): SelectionState => {
    if (bus._state) return bus._state;
    if (!bus._sel) return null; // legacy writer fallback
    if (bus._sel.def === '__remove') return { mode: 'remove' };
    return { mode: 'build', def: bus._sel.def, dir: bus._sel.dir };
  },
  setSelection: (sel: SelectionState) => {
    bus._state = sel;
    bus._sel =
      sel?.mode === 'build' ? { def: sel.def, dir: sel.dir } :
      sel?.mode === 'remove' ? { def: '__remove', dir: 0 as Dir } :
      null;
  },
};
// LANE-UI sets the build selection through this hook:
(window as any).__fktryBus = bus;

async function boot() {
  sim.init(data, 1337);
  // publish the speaker handshake BEFORE ui.init — the dock resolves its control
  // exactly once, during init, and must find a live-shaped RadioControl there.
  (window as any).__fktrySpeaker = { radio: speaker.control };
  await renderer.init(document.getElementById('game')!, data);
  ui.init(document.getElementById('ui')!, data, bus);
  screen.init(document.getElementById('screen') as HTMLCanvasElement, data);
  audio.init(data);
  // browsers gate AudioContext on a user gesture — unlock on the first one,
  // then attach the adapter to the freshly built engine.
  addEventListener('pointerdown', () => {
    audio.unlock();
    speaker.attach();
  }, { once: true });

  // click-to-place / hover ghost glue
  const game = document.getElementById('game')!;
  // Ghost refresh runs on move AND every frame (a keyboard disarm — Esc — used to leave
  // a stale demolition tint on screen until the mouse moved; round-5 UI finding).
  let lastPointer: { x: number; y: number } | null = null;
  function refreshGhost() {
    if (!lastPointer) return;
    const sel = bus.selection!();
    const tile = renderer.pickTile(lastPointer.x, lastPointer.y);
    if (sel?.mode === 'remove') {
      renderer.setGhost(null, tile, 0, 'remove');
    } else if (sel?.mode === 'build') {
      renderer.setGhost(sel.def, tile, sel.dir, 'build');
    } else {
      renderer.setGhost(null, tile, 0, 'build'); // inspect / no selection: no ghost
    }
  }
  game.addEventListener('pointermove', (e) => {
    lastPointer = { x: e.clientX, y: e.clientY };
    refreshGhost();
  });
  game.addEventListener('pointerdown', (e) => {
    if (e.button !== 0) return; // pan/context buttons never place
    const sel = bus.selection!();
    const tile = renderer.pickTile(e.clientX, e.clientY);
    if (!sel || !tile) return;
    if (sel.mode === 'remove') sim.enqueue({ kind: 'remove', pos: tile });
    else if (sel.mode === 'build') sim.enqueue({ kind: 'place', def: sel.def, pos: tile, dir: sel.dir });
  });

  const MS_PER_TICK = 1000 / TICKS_PER_SECOND;
  let acc = 0, last = performance.now();
  function loop(now: number) {
    acc += Math.min(250, now - last); last = now;
    while (acc >= MS_PER_TICK) { sim.tick(); acc -= MS_PER_TICK; }
    const snap = sim.snapshot();
    const events = sim.drainEvents();
    refreshGhost();
    renderer.onEvents?.(events); // v9: same array Screen/Audio get — read-only, same frame
    renderer.render(snap, acc / MS_PER_TICK);
    ui.update(snap, events);
    screen.onEvents(events);
    screen.frame(now, snap);
    audio.onEvents(events);
    audio.frame(now, snap);
    requestAnimationFrame(loop);
  }
  requestAnimationFrame(loop);

  // dev-only: paste-free demo — builds SIM's reference factory. The layout uses
  // research-gated ids, so it is a post-research save by definition: grant the techs
  // it needs first (testkit rides the public save/load API), then dispatch.
  if (import.meta.env.DEV) {
    (window as any).__fktryDemo = async () => {
      const { referenceFactory, referenceFactoryTech } = await import('./sim/reference');
      const techs = referenceFactoryTech(data);
      sim.enqueue({ kind: 'grantResearch', tech: techs }); // v5 command; queued first
      const cmds = referenceFactory(data);
      cmds.forEach((c) => sim.enqueue(c));
      return `${techs.length} techs granted, ${cmds.length} commands dispatched`;
    };
  }
}
boot();