// Boot, game lifecycle (menu, new game, load, autosave), panel wiring and the real-time loop.
// The loop is driven by animation frames while the tab is visible and by a worker heartbeat while it
// is hidden, so the game keeps running in the background (it still stops at a budget review, a danger
// warning, or when the in-tray holds its maximum of proposals).
//
// Dev URL params skip the menu and start a new game at once (and never touch the real autosave):
//   ?lang=fr  ?seed=N  ?pronouns=he|she|they  ?alloc=K (scale every sector budget by K)
//   ?skip=DAYS (fast-forward, answering cards at random)  ?card=ID (show that card first)
//   ?dev (exposes window.__game)  ?new (just start a game)   ?menu (force the menu)
//   ?msPerDay=N (real milliseconds per in-game day at speed 1, for tests)  ?untilAlert (stop ?skip at the first warning)

import {
  createGame, advanceDay, setBudget, setSpeed, setPronouns, dismissAlert, isWaiting,
  createClock, consumeClock, ensureCard, answerCard, indexCards, nextFloat,
} from "./engine/index.js";
import { initI18n, setLang, getLang, t } from "./i18n/i18n.js";
import { createStorage, writeSave, loadSettings, saveSettings, KEYS } from "./save/storage.js";
import { tilt } from "./ui/desk.js";
import { createDashboard } from "./ui/dashboard.js";
import { createCalendar } from "./ui/calendar.js";
import { createNewspaper } from "./ui/newspaper.js";
import { createDecision } from "./ui/decision.js";
import { createLedger } from "./ui/ledger.js";
import { createTelegram } from "./ui/telegram.js";
import { createEndgame } from "./ui/endgame.js";
import { createMenu } from "./ui/menu.js";
import { createShelf } from "./ui/shelf.js";
import { createAudio } from "./ui/audio.js";
import { createMusic } from "./ui/music.js";
import { createWalkman } from "./ui/walkman.js";
import { DEFAULT_MIX } from "./save/storage.js";

const params = new URLSearchParams(location.search);
const getJson = (url) => fetch(url).then((r) => r.json());

// ---- Content ----

const [balance, newsTpl, endgame, characters, cardIndex, scenarioIndex] = await Promise.all([
  getJson("data/balance.json"),
  getJson("data/newspaper.json"),
  getJson("data/endgame.json"),
  getJson("data/characters.json"),
  getJson("data/cards/index.json"),
  getJson("data/scenarios/index.json"),
]);
const cards = (await Promise.all(cardIndex.files.map((f) => getJson(`data/cards/${f}`)))).flat();
const scenarios = Object.fromEntries(
  await Promise.all(scenarioIndex.scenarios.map(async (id) => [id, await getJson(`data/scenarios/${id}.json`)])),
);
const cardsById = indexCards(cards);
const content = { scenarios, balance, cards };

// ---- Settings and storage ----

const storage = createStorage();
let settings = loadSettings(storage);
const browserLang = navigator.language?.startsWith("fr") ? "fr" : "en";
await initI18n(params.get("lang") ?? settings.lang ?? browserLang);

const audio = createAudio({ enabled: () => settings.sound, volume: () => settings.volume, mix: () => settings.mix });

// Background music from the music folder, driven by the cassette player on the desk.
const music = createMusic({
  getVolume: () => settings.volume * settings.mix.music,
  onUserChoice: (on) => { if (settings.musicOn !== on) applySettings({ musicOn: on }); },
});
let gestured = false;
const startMusic = () => gestured && music.unlockedByGesture(settings.musicOn);
for (const ev of ["pointerdown", "keydown"]) {
  document.addEventListener(ev, (e) => {
    if (e.target.closest?.("#walkman")) return; // pressing a walkman key is its own choice
    gestured = true;
    startMusic();
  }, { passive: true });
}
music.load().then(startMusic);

const DEV_PARAMS = ["seed", "pronouns", "alloc", "skip", "card", "dev", "new"];
const devRun = DEV_PARAMS.some((k) => params.has(k)) && !params.has("menu");

// ---- Game and screen state ----

let state = null; // the running game, or null in the main menu
let scenario = null;
let panels = null;
let menuOpen = true;
let lastSpeed = 1;
let view = "tray"; // phone layout: which paper is on the desk (tray, brief, news, clock, ledger)
let seen = null; // pending flags and tray size at the last change, to play sounds on transitions

const el = {
  dash: document.getElementById("dashboard"),
  folder: document.getElementById("folder"),
  ledger: document.getElementById("ledger"),
  alerts: document.getElementById("alerts"),
  endgame: document.getElementById("endgame"),
  cal: document.getElementById("calendar"),
  news: document.getElementById("newspaper"),
  menu: document.getElementById("menu"),
  shelf: document.getElementById("shelf"),
  walkman: document.getElementById("walkman"),
};
const pad = document.getElementById("pad");
for (const id of ["dash", "folder", "cal", "news"]) tilt(el[id], id);
tilt(el.walkman, "walkman", 0.5);

// A new week brings a proposal to the tray; with none eligible the week is simply empty.
function prepareWeek() {
  if (state.pending.weeklyCard) ensureCard(state, balance, cards);
}

function updateTitle() {
  const base = t("app.title");
  if (!state || state.over) {
    document.title = base;
    return;
  }
  const waiting = document.hidden && isWaiting(state) && !state.pending.profile;
  const n = state.inbox.length;
  document.title = `${waiting ? "● " : ""}${n ? `(${n}) ` : ""}${base}`;
}

// Sounds for what just changed: a new proposal, a budget review, a warning, a full tray, the end.
function notify() {
  const p = state.pending;
  const now = { review: p.review, alert: p.alert, inboxFull: p.inboxFull, over: Boolean(state.over), inbox: state.inbox.length };
  if (seen) {
    if (now.over && !seen.over) audio.play(state.over.type === "term" ? "fanfare" : "fall");
    else if (now.alert && !seen.alert) audio.play("alert");
    else if (now.review && !seen.review) audio.play("page");
    else if (now.inboxFull && !seen.inboxFull) audio.play("chime");
    else if (now.inbox > seen.inbox) audio.play("paper");
  }
  seen = now;
}

function autosave() {
  if (!state || devRun) return;
  if (state.over) storage.remove(KEYS.auto); // a finished game has nothing to continue
  else writeSave(storage, KEYS.auto, state);
}

// ---- Panels ----

function build() {
  panels?.decision.destroy();
  state.lang = getLang();
  pad.classList.add("is-dealing"); // the papers land on the desk
  setTimeout(() => pad.classList.remove("is-dealing"), 1100);
  panels = {
    dash: createDashboard(el.dash, scenario),
    decision: createDecision(el.folder, {
      cardsById, characters, inboxMax: balance.cards.inboxMax, onAnswer, onProfile,
      onStamp: (choice) => audio.play(choice === "yes" ? "stampYes" : "stampNo"),
      keysEnabled: () => !menuOpen,
    }),
    ledger: createLedger(el.ledger, scenario, { onConfirm: () => { audio.play("sign"); render(); } }),
    cal: createCalendar(el.cal, balance, { onSpeed, onMenu: openMenu }),
    shelf: createShelf(el.shelf, balance, { getView: () => view, onView: setView, onSpeed, onMenu: openMenu }),
    walkman: createWalkman(el.walkman, { music, onPress: () => audio.play("click") }),
    news: createNewspaper(el.news, newsTpl),
    alerts: createTelegram(el.alerts, { alerts: endgame.alerts, onDismiss }),
    endgame: createEndgame(el.endgame, { newsName: newsTpl.name, endgame, cards, onAgain: quitToMenu }),
  };
  render();
}

// Phone layout: the ledger takes the screen when a review opens and hands it back to the tray afterwards.
function syncView(ledgerOpen) {
  if (ledgerOpen && !seen?.review) view = "ledger";
  else if (!ledgerOpen && view === "ledger") view = "tray";
  if (state.pending.inboxFull && !seen?.inboxFull && !ledgerOpen) view = "tray";
  pad.dataset.view = view;
}

function setView(next) {
  view = next;
  pad.dataset.view = view;
  panels?.shelf.update(state, balance);
  audio.play("click");
}

function render() {
  if (!state) return;
  const ledgerOpen = Boolean(state.pending.review && !state.pending.profile && !state.over);
  syncView(ledgerOpen);
  notify();
  // A hidden tab keeps playing but skips the drawing; it redraws everything when it comes back.
  if (!document.hidden) {
    for (const p of Object.values(panels)) p.update(state, balance);
    // The ledger covers the folder and the side column; the end screen covers everything.
    pad.classList.toggle("is-ledger", ledgerOpen);
    pad.classList.toggle("is-endgame", Boolean(state.over));
  }
  updateTitle();
  autosave();
}

// ---- Game lifecycle ----

function newGame({ countryName, scenarioId = scenarioIndex.scenarios[0], pronouns }) {
  return createGame({
    scenario: scenarios[scenarioId],
    balance,
    seed: params.has("seed") ? Number(params.get("seed")) : crypto.getRandomValues(new Uint32Array(1))[0],
    lang: getLang(),
    countryName,
    pronouns,
  });
}

function enterGame(next) {
  state = next;
  scenario = scenarios[state.scenarioId];
  if (params.has("dev")) window.__game = state;
  lastSpeed = state.speed || 1;
  clock.acc = 0;
  view = "tray";
  seen = null;
  prepareWeek();
  closeMenu();
  build();
}

function openMenu() {
  if (!state) return;
  menuOpen = true;
  pad.classList.add("is-menu");
  menu.show("game");
}

function closeMenu() {
  menuOpen = false;
  pad.classList.remove("is-menu");
  menu.hide();
}

function quitToMenu() {
  autosave();
  panels?.decision.destroy();
  state = null;
  panels = null;
  for (const id of ["dash", "folder", "ledger", "alerts", "endgame", "cal", "news", "shelf", "walkman"]) el[id].innerHTML = "";
  document.title = t("app.title");
  el.ledger.hidden = true;
  el.alerts.hidden = true;
  el.endgame.hidden = true;
  pad.classList.remove("is-ledger", "is-endgame");
  pad.classList.add("is-menu");
  menuOpen = true;
  menu.show("main");
}

function applySettings(patch) {
  const langChanged = patch.lang && patch.lang !== getLang();
  const { resetMix, ...rest } = patch;
  settings = { ...settings, ...rest, mix: resetMix ? { ...DEFAULT_MIX } : { ...settings.mix, ...rest.mix } };
  if (resetMix) settings.volume = 0.6;
  saveSettings(storage, settings);
  if (patch.sound === true) audio.play("click");
  if (patch.volume !== undefined || patch.mix?.music !== undefined || resetMix) music.applyVolume();
  if (!langChanged) return;
  setLang(patch.lang);
  document.title = t("app.title");
  if (state) build();
  menu.refresh();
}

// The sound heard when a mixer slider is released.
const PREVIEW = {
  master: "chime", stamp: "stampYes", paper: "paper", page: "page", sign: "sign", telegram: "telegram", alert: "alert",
  chime: "chime", tick: "tick", countdown: "clockTick", click: "click", ending: "fanfare",
};

const menu = createMenu(el.menu, {
  content,
  storage,
  getState: () => state,
  getSettings: () => settings,
  handlers: {
    onStart: (options) => enterGame(newGame(options)),
    onLoadState: enterGame,
    onResume: closeMenu,
    onQuit: quitToMenu,
    onSettings: applySettings,
    onPreview: (key) => audio.play(PREVIEW[key] ?? "click"),
  },
});

// ---- Player actions ----

function onSpeed(speed) {
  if (speed > 0) lastSpeed = speed;
  setSpeed(state, balance, speed);
  audio.play("click");
  render();
}

function onAnswer(choice, id) {
  answerCard(state, balance, cards, choice, id);
  render();
}

function onProfile(pronouns) {
  setPronouns(state, pronouns);
  render();
}

function onDismiss() {
  dismissAlert(state);
  audio.play("paper");
  render();
}

document.addEventListener("keydown", (e) => {
  if (!state || e.target.closest?.("input, textarea, select") || e.ctrlKey || e.metaKey || e.altKey) return;
  if (menuOpen) return; // the menu handles its own keys
  if (e.key === "Escape" && !state.over) {
    openMenu();
  } else if (e.code === "Space") {
    e.preventDefault();
    onSpeed(state.speed > 0 ? 0 : lastSpeed);
  } else if (/^[1-9]$/.test(e.key) && balance.time.speeds[Number(e.key) - 1]) {
    onSpeed(balance.time.speeds[Number(e.key) - 1]);
  }
});

addEventListener("pagehide", autosave);
document.addEventListener("visibilitychange", () => {
  if (document.hidden) autosave();
  else if (state) render(); // redraw what was skipped while hidden
  updateTitle();
});

// ---- Dev shortcuts ----

function devGame() {
  const s = newGame({ pronouns: params.get("pronouns") ?? undefined });
  state = s; // the helpers below act on `state`
  if (params.has("alloc")) {
    const k = Number(params.get("alloc"));
    setBudget(s, balance, { alloc: Object.fromEntries(Object.entries(s.sectors).map(([id, x]) => [id, x.alloc * k])) });
  }
  for (let i = 0, n = Number(params.get("skip") ?? 0); i < n && !s.over; i++) {
    if (s.pending.profile) setPronouns(s, "they");
    s.pending.review = false;
    while (s.pending.alert) dismissAlert(s);
    prepareWeek();
    while (s.inbox.length) answerCard(s, balance, cards, nextFloat(s) < 0.5 ? "yes" : "no");
    advanceDay(s, balance);
    if (params.has("untilAlert") && s.pending.alert) break; // stop on the first danger warning
  }
  if (cardsById.has(params.get("card"))) {
    s.inbox.unshift({ id: params.get("card"), day: s.day, category: cardsById.get(params.get("card")).category });
  }
  return s;
}

// ---- Start ----

const clock = createClock();
let last = performance.now();

if (devRun) enterGame(devGame());
else quitToMenu();

// One step of the game: turns elapsed real time into in-game days. Returns true when a day passed.
// A long gap since the last step (a frozen background tab waking up) is caught up within a limit.
function step(now) {
  const dt = now - last;
  last = now;
  if (!state || menuOpen || state.speed <= 0 || state.over || isWaiting(state)) return false;
  let days = consumeClock(clock, dt, msPerDay(), state.speed, balance.time.catchUpMs);
  let advanced = false;
  while (days-- > 0) {
    const r = advanceDay(state, balance);
    if (!r.advanced) break;
    advanced = true;
    if (r.events.weeklyCard) prepareWeek();
    if (!document.hidden && state.speed <= 2 && !isDayBeforeIssue()) audio.play(state.day % 2 ? "tick" : "tock");
    if (isWaiting(state) || state.over) break;
  }
  if (advanced) render();
  return advanced;
}

const devMsPerDay = devRun && params.has("msPerDay") ? Number(params.get("msPerDay")) : 0; // dev: faster days for tests
const msPerDay = () => devMsPerDay || (settings.slow ? balance.time.slowMsPerDay : balance.time.msPerDay);

// The day before a new proposal arrives (the Sunday before each Monday), a small clock ticks while that day runs.
const isDayBeforeIssue = () => (state.day + 1) % balance.time.daysPerWeek === 0;
let lastCountdown = "";

function countdownTicks(p) {
  if (!state || menuOpen || state.speed <= 0 || state.over || isWaiting(state) || document.hidden || !isDayBeforeIssue()) return;
  const perDay = state.speed >= 4 ? 10 : 20; // the ticks follow the dial: faster at higher speeds
  const n = Math.floor(p * perDay);
  const key = `${state.day}:${n}`;
  if (key === lastCountdown) return;
  lastCountdown = key;
  audio.play(n % 2 ? "clockTock" : "clockTick");
}

function frame(now) {
  step(now);
  if (panels) {
    const p = Math.min(1, clock.acc / msPerDay());
    panels.cal.clockHand(p);
    panels.shelf.clockHand(p);
    countdownTicks(p);
  }
  requestAnimationFrame(frame);
}
requestAnimationFrame(frame);

// Background play: animation frames stop in a hidden tab, so a worker's timer keeps the game going.
function startHeartbeat() {
  const beat = () => { if (document.hidden) step(performance.now()); };
  try {
    new Worker(new URL("./timer-worker.js", import.meta.url)).onmessage = beat;
  } catch {
    setInterval(beat, 1000); // no worker support: the slower main-thread timer still works
  }
}
startHeartbeat();