// Splatter Tennis — boot, main loop, intro overlay, and the window.T test hooks.
// World units: meters. z axis = court depth, 0 at FAR baseline, 23.77 at NEAR baseline.
// Module map: config (tuning/constants) · state (mutable game state) · gameplay (logic/update)
//             render (camera/drawing) · input (keys/touch) · audio (sfx/umpire) · panel (T tuning UI)

import { TUNE, COURTS, TOURS, KITS, SKINS, MODES, MENU, DIFFS, EATEN_RESTART, DONE_RESTART, WEAPONS, bossArt, LEAGUES, leagueOf, cupRoundsFor, cupFixture, cupRoundName, matchFoe, LADDER } from './config.js';
import { P, O, ball, score, G, setupPoint, sendBoy, selectCourt, selectTour, selectKit, selectSkin } from './state.js';
import { update, restartRun, keyPressed, solveShot, inServeBox, inCourt, forceZombies, startGore, splatPoint, deliverTin, selectWeapon, grantWeapon, showModal, dismissModal, flickTarget, dragServe, toggleTestMode } from './gameplay.js';
import { startDuel, resolveInterlude, startHorde, startBossFight, endBossFight, startDrill, endDrill, startMatch, endMatch, startBench, endBench, FALL, benchFall, startNetVs, endNetVs } from './beats.js';
import { netConnect, netHooks, netAgain } from './net.js';
import { fitViewport, render, proj, RES, SPRV, LOAD, SPR, drawLook, endHit } from './render.js';
import { voice, ambient, menuMusic, menuDuck } from './audio.js';
import { zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, pops, explode, hurtPlayer, killPlayer , spawnBarrel } from './zombies.js';
import { cv } from './dom.js';
import { haptic } from './haptics.js';
import * as stats from './stats.js';
import * as profile from './profile.js';
import * as recorder from './recorder.js';
import './input.js';

let last = performance.now();
// T.pause(true) freezes the WORLD but keeps drawing, so a value changed in devtools shows up on the
// next frame without the scene moving on underneath you. Halting rAF instead (the old test recipe)
// freezes the picture too, which is useless for looking at a shot.
let paused = false;
// CALM STATES RUN SLOW. The battery bill is fill-rate × frame-rate, and two screens can sit on a
// phone for minutes while fully static: a SETTLED modal (the world is frozen behind it — only the
// blink still moves) and the death summary once its fade and gore have played out. 20-odd fps
// there is invisible and thirds the drain; live play stays at TUNE.fps, untouched — the 60 was a
// feel decision and this deliberately never applies to anything that moves.
const calmFps = () => G.modal && G.modal.in >= 1 ? 20
  : G.mode === 'eaten' && G.eatenT > EATEN_RESTART + 1 ? 24 : 0;
let lowPowerApplied = false; // the last lowPower state fitViewport was run under (T-panel flips it live)
function frame(now) {
  requestAnimationFrame(frame); // schedule FIRST: one bad frame must never kill the loop (a thrown error froze the game for good)
  if ((TUNE.lowPower >= 0.5) !== lowPowerApplied) { lowPowerApplied = TUNE.lowPower >= 0.5; fitViewport(); }
  const cap = calmFps() || TUNE.fps;
  if (cap && now - last < 1000 / cap - 2) return; // frame cap (battery): skip RAF ticks until it's our beat
  // THE MENU IS OPAQUE (#intro: fixed, inset 0, solid background). Painting the whole court at RES
  // density behind it — for the minutes a phone idles on the splash and stats screens — was pure
  // battery burn nobody could see. The world holds still too; nothing on it predates the menu.
  if (menuUp()) { last = now; return; }
  if (paused) { last = now; render(); return; }
  let dt = Math.min(0.04, (now - last) / 1000); last = now;
  // A chapter boss dies in slow motion. The clock that ENDS it runs at real speed, so the effect is
  // always the same length in seconds however far the world has been slowed.
  if (G.slowT > 0) { G.slowT -= dt; dt *= TUNE.bossSlowMo; }
  update(dt); render();
}

// PORTRAIT ONLY, from 2026-08-20. The app enforces it where it can actually be enforced — the
// shell's Info.plist lists one supported orientation, so an iPhone running the store build simply
// never rotates. This line is the WEB half of the same decision and is best-effort by nature:
// Chrome/Android honours a lock once the page is installed or fullscreen, and iOS Safari has no
// Screen Orientation lock at all, so the browser build keeps doing whatever landscape does today
// (PROJECT.md OPEN 6 — landscape is untested, not a surface). Nothing downstream may assume it took.
try { screen.orientation?.lock?.('portrait')?.catch(() => {}); } catch {}

fitViewport();
// iOS PWA cold start. Launched from the homescreen, WebKit resolves the viewport AND every env()
// safe-area inset once, against a provisional geometry, and never revisits them until the geometry
// is "exercised" — which is why the game only filled the screen after a rotate and back, and why
// waiting for an event could never work: nothing fires. Toggling viewport-fit off and on is the
// known WebKit workaround: it forces that recalculation without the user rotating anything.
// Standalone only, because that is the only mode with the bug.
if (navigator.standalone || matchMedia('(display-mode: standalone)').matches) {
  const meta = document.querySelector('meta[name=viewport]'), real = meta.content;
  meta.content = real.replace('viewport-fit=cover', 'viewport-fit=auto');
  requestAnimationFrame(() => { meta.content = real; requestAnimationFrame(fitViewport); });
}
setupPoint();
// warm both faces so the canvas never paints a system-serif fallback frame
if (document.fonts) for (const f of ['700 8px Silkscreen', '400 8px Silkscreen', '400 20px Bangers'])
  document.fonts.load(f);

// One opaque overlay stays mounted across every menu; the court is only revealed on start.
const intro = document.getElementById('intro');
const menuUp = () => !intro.hidden;
const remembered = k => { try { return localStorage.getItem(k); } catch { return null; } };
let picked = remembered('court') || COURTS[0].id;
let pickedTour = remembered('tour') || TOURS[0].id;
// every stage change is a gesture, so it is also a safe place to (re)start the theme. The setup
// screen syncs its picker rows on entry: the identity screen writes the same picked* state, and
// rows that only ever toggle on their OWN taps would keep showing the boot-time selection.
// EVERY SCREEN OPENS AT ITS TOP (2026-08-31, Oliver: scroll the stats to the bottom, swipe back,
// and the splash comes up scrolled with its buttons off screen). #intro is the one scroller the
// menus share, so its offset outlives the stage that earned it unless it is reset here — the one
// place every stage change goes through.
const go = stage => {
  if (stage === 'splash') refreshSplash();
  if (stage === 'stats') refreshRecorder();
  if (stage === 'setup') syncSetup();
  if (stage === 'train') buildTrain();
  intro.dataset.stage = stage;
  intro.scrollTop = 0;
  dealStage(stage);
  menuMusic();
};
// THE ARCADE ENTRANCE, re-armed. The title screen deals its plaque and buttons in from the left
// every time you arrive at it — off a run, off the stats, off the boot. Removing the class and
// forcing a reflow before adding it back is the whole trick: an animation whose class never left
// cannot restart, and there is no "replay" switch in CSS.
function dealStage(stage) {
  // the title screen waits for the boot: while the loading state is up there is nothing to deal
  // (the element is looked up here, not read off the const below: go() can fire before that line
  // has run, and a temporal-dead-zone throw in the menu funnel would take every screen with it)
  if (stage === 'splash' && document.getElementById('splash').classList.contains('busy')) return;
  intro.classList.remove('deal');
  void intro.offsetWidth;
  intro.classList.add('deal');
}

// Additional solo modes. League, Gore and multiplayer have their own splash doors.
let pickedMode = remembered('mode') || MODES[0].id;
let pickedDiff = remembered('diff') || 'medium';
const modeOf = id => MODES.find(x => x.id === id);
const modeList = document.getElementById('modeList');
const pickMode = id => { pickedMode = id; try { localStorage.setItem('mode', id); } catch {} };
function buildTops() {
  modeList.innerHTML = '';
  for (const { mode } of MENU) {
    const card = modeOf(mode), b = document.createElement('button');
    b.className = 'mode';
    b.style.backgroundImage = `url(assets/${card.art}.png?v=${SPRV})`;
    b.innerHTML = `<span class="cb"><b>${card.name}</b></span>`;
    b.addEventListener('click', () => {
      pickMode(mode);
      go(mode === 'train' ? 'train' : 'setup');
    });
    modeList.appendChild(b);
  }
}
buildTops();
const difficultyList = document.getElementById('difficultyList');
for (const d of DIFFS) {
  const b = document.createElement('button');
  b.textContent = d.name;
  b.dataset.id = d.id;
  b.addEventListener('click', () => {
    pickedDiff = d.id;
    try { localStorage.setItem('diff', d.id); } catch {}
    syncSetup();
  });
  difficultyList.appendChild(b);
}

// ---- THE LOBBY. Oliver, 2026-08-15: *"multiplayer should be easier to setup — a share with link
// next to the code; entering the code is done in some plain js confirm dialog thingy; somewhere
// when hosting or also when joining the player should name themselves."* All three are one screen.
//
// WHY IT IS A MENU SCREEN AND NOT A COURT. Hosting used to drop you straight onto an empty court
// and show the code in a canvas modal — which cannot carry a SHARE button, cannot be typed into,
// and turns a mistyped code into a CONNECTION LOST card over a match that never started. The
// socket is now opened from the menu and the game stays parked behind the overlay until the room
// actually fills: `netHooks.paired` is what takes the court, one frame before netStart writes to
// it. Everything else about the protocol is untouched.
//
// THE NAME IS THE WORLD BOARD'S NAME (stats.saveName). One name per player, wherever it shows.
const vsPick = document.getElementById('vsPick'), vsWait = document.getElementById('vsWait');
const vsName = document.getElementById('vsName'), vsCode = document.getElementById('vsCode');
const vsSay = (id, text) => { document.getElementById(id).textContent = text; };

function vsOpen(code = '') {
  vsName.value = stats.savedName();
  vsCode.value = code;
  vsPick.hidden = false; vsWait.hidden = true;
  vsSay('vsErr', '');
  go('vs');
}
// join === null hosts; `death` is the host's one decision and rides the room to both phones
function vsGo(join, death = false) {
  stats.saveName(vsName.value);        // whatever is in the field is who the other phone sees
  const code = join ? stats.tidyName(vsCode.value).replace(/[^A-Z0-9]/g, '') : null;
  if (join && code.length < 4) { vsSay('vsErr', 'THE CODE IS FOUR LETTERS'); return; }
  if (!startNetVs()) return;           // the court-ownership contract, same as every other mode
  netConnect(code, death, picked);     // the host's court rides the room (server.py)
  vsPick.hidden = true; vsWait.hidden = false;
  vsSay('vsWHdr', join ? 'JOINING' : 'ROOM CODE');
  vsSay('vsBig', join ? code : '····');
  vsSay('vsMsg', join ? 'KNOCKING ON THEIR DOOR' : 'WAITING FOR THEM TO JOIN');
  document.getElementById('vsShare').hidden = !!join;   // nothing to share on the way in
}
document.getElementById('vsHostC').addEventListener('click', () => vsGo(null));
document.getElementById('vsHostD').addEventListener('click', () => vsGo(null, true));
document.getElementById('vsJoin').addEventListener('click', () => vsGo(true));
vsCode.addEventListener('keydown', e => { if (e.key === 'Enter') vsGo(true); });
// SHARE, then COPY. navigator.share is the phone's own sheet (WhatsApp, Signal, wherever the
// friend actually is) and is exactly the "easier setup" — the clipboard is the desktop fallback,
// and the code stays on screen for the two of them in the same room reading it aloud.
// THE MESSAGE IS THE CODE, and deliberately carries no link. A link only opens the INSTALLED app
// on Android (the manifest's scope covers the site, so its WebAPK claims these URLs); an iOS
// home-screen app can claim nothing, so on an iPhone it always opened Safari instead — a second
// copy of the game, with its own storage and none of the name they picked in the app. Until this
// is a real app with universal links, four letters are the invitation. (`#net-ABCD` still works as
// a door — it is what a deep link will carry the day there is one — nothing just sends it now.)
document.getElementById('vsShare').addEventListener('click', async () => {
  const text = 'JOIN ME IN SPLATTER TENNIS — THE CODE IS ' + (G.net && G.net.code || '');
  try {
    if (navigator.share) await navigator.share({ title: 'SPLATTER TENNIS', text });
    else { await navigator.clipboard.writeText(text); vsSay('vsMsg', 'COPIED — SEND IT TO THEM'); }
  } catch { /* a cancelled share sheet is not an error */ }
});
const vsQuit = () => { endNetVs(); vsOpen(); };     // a room you walked out of must give its socket back
document.getElementById('vsCancel').addEventListener('click', vsQuit);
document.getElementById('vsBack').addEventListener('click', () => {
  if (!vsWait.hidden) return vsQuit();              // waiting: the chevron cancels rather than leaves
  endNetVs(); go('splash');
});
// the three hooks net.js calls back through — all of them no-ops once the court has been taken
netHooks.paired = () => start('classic'); // start() refuses when the menu is already down (URL entry)
netHooks.room = code => { vsSay('vsBig', code); vsSay('vsMsg', 'WAITING FOR THEM TO JOIN'); };
netHooks.lost = text => {
  if (!menuUp()) return false;                      // mid-match: the court's own card says it
  endNetVs();
  vsPick.hidden = false; vsWait.hidden = true;
  vsSay('vsErr', text);
  return true;
};

// THE LIVE PLAYER, redrawn on every tap of a tour, a kit or a skin. It draws the REAL sprite through
// the REAL tint (drawLook), so there is no second recolour to keep in step with the first — the only
// way this can show a wrong colour is if the court would show it too.
// The sprite sheets load asynchronously and the menu deliberately parks the game loop, so the first
// draw can land before the art does: retry on a slow poll that stops itself the moment it succeeds.
const pLookCv = document.getElementById('pLook'),
      cdLookCv = document.getElementById('cdLook');
let lookPoll = 0;
function refreshLook() {
  const t = TOURS.find(x => x.id === pickedTour) || TOURS[0];
  const k = KITS.find(e => e.id === pickedKit) || KITS[0];
  const s = SKINS.find(e => e.id === pickedSkin) || SKINS[0];
  // The editor and profile draw the same kit; drawing the hidden one is a cheap blit.
  const ok = drawLook(pLookCv, t, k, s) & drawLook(cdLookCv, t, k, s);
  clearTimeout(lookPoll);
  if (!ok) lookPoll = setTimeout(refreshLook, 200);   // sprites still coming; ask again shortly
}

// --- KIT and SKIN swatches, built from the tables. Same rule as the tour tiles: tapping selects and
// nothing more, SERVE UP is what commits. Both rows are one builder — they differ only in which
// table they read and which localStorage key they remember, and a second copy of this loop to say
// "skin" instead of "kit" would be the same eleven lines twice.
const swatches = (rowId, nameId, table, keyName, get, set) => {
  const row = document.getElementById(rowId), label = document.getElementById(nameId);
  for (const e of table) {
    const b = document.createElement('button');
    b.className = e.id === get() ? 'on' : '';
    b.dataset.id = e.id;                  // syncSetup finds the row's buttons by id
    b.style.background = e.sw;
    b.title = e.name;                       // desktop hover; the h3 label is what a phone reads
    b.setAttribute('aria-label', e.name);
    b.addEventListener('click', () => {
      set(e.id);
      try { localStorage.setItem(keyName, e.id); } catch {}
      for (const el of row.children) el.classList.toggle('on', el === b);
      label.textContent = e.name;
      refreshLook();
    });
    row.appendChild(b);
  }
  label.textContent = (table.find(e => e.id === get()) || table[0]).name;
};
let pickedKit = remembered('kit') || KITS[0].id;
let pickedSkin = remembered('skin') || SKINS[0].id;
refreshLook();

// THE LEAGUE PANEL (the leagues): the cup's setup face — your league writ large and the band's
// roster with your all-time felled counts (stats' per-foe tallies, key 'L'+index). The identity
// block these panels replace still shows for every other mode; the card owns it anyway.
function buildLeaguePanel() {
  const lg = leagueOf(profile.prof.lg);
  const badge = document.getElementById('lgBadge');
  badge.src = `assets/badge_l${lg.id}.png?v=${SPRV}`;
  const name = document.getElementById('lgName');
  name.textContent = `LEAGUE ${lg.id} — ${lg.name}`;
  name.style.color = lg.color;
  const z = stats.read('all', undefined, stats.MODE_MATCH).z;
  const foes = document.getElementById('lgFoes');
  foes.innerHTML = '';
  let felled = 0;
  for (let n = lg.band[0]; n <= lg.band[1]; n++) {
    const f = matchFoe(n), k = z[f.key] || 0;
    if (k) felled++;
    const d = document.createElement('div');
    d.className = 'lgFoe' + (k ? '' : ' un') + (n === lg.band[1] ? ' fin' : '');
    d.innerHTML = `<img src="${foeArt(f)}" alt=""><b>${f.short}</b><i>${k ? '×' + k : '—'}</i>`;
    foes.appendChild(d);
  }
  const size = lg.band[1] - lg.band[0] + 1;
  // ...and THE RECORD (THE SEASON): how far this league's cup has ever let you get. It is the one
  // line that makes a lost attempt count for something, so it takes the second half of the sub
  // whenever there is one to show.
  const best = profile.cupBest(lg.id);
  document.getElementById('lgSub').innerHTML = (felled >= size
    ? 'ALL ' + size + ' FELLED'
    : felled + ' OF ' + size + ' FELLED')
    + (best ? '<br>BEST IN THE CUP: ' + cupRoundName(lg.id, best)
            : '<br>THE CUP IS THE WAY UP — NEVER ENTERED');
}

// A setup contains only decisions for this match. Identity lives in the player screen.
function syncSetup() {
  document.getElementById('sTitle').textContent = modeOf(pickedMode).name;
  document.getElementById('sPlayerName').textContent = stats.savedName() || 'YOUR PLAYER';
  document.getElementById('sPlayerKit').textContent =
    (KITS.find(k => k.id === pickedKit) || KITS[0]).name;
  document.getElementById('sDifficulty').hidden = pickedMode !== 'classic';
  for (const b of difficultyList.children) {
    b.classList.toggle('on', b.dataset.id === pickedDiff);
    b.setAttribute('aria-pressed', b.dataset.id === pickedDiff);
  }
  const opponent = document.getElementById('sOpponent');
  opponent.hidden = pickedMode !== 'train';
  if (pickedMode === 'train') {
    const f = matchFoe(trainRung);
    opponent.querySelector('img').src = foeArt(f);
    opponent.querySelector('b').textContent = f.name;
  }
  const climb = document.getElementById('sClimb');
  climb.hidden = pickedMode !== 'zombie';
  climb.textContent = `THE CLUB, BOTTOM UP · ${leagueOf(profile.prof.lg).band[1]} OPPONENTS`;
  if (!courtUnlocked(picked)) picked = leagueOf(profile.prof.lg).court;
  let locked = 0;
  for (const el of courtButtons) {
    const open = courtUnlocked(el.dataset.id);
    el.disabled = !open;
    el.classList.toggle('lock', !open);
    el.classList.toggle('on', open && el.dataset.id === picked);
    el.setAttribute('aria-pressed', open && el.dataset.id === picked);
    const sub = el.querySelector('.cb > i');
    sub.textContent = open ? '' : 'LEAGUE ' + courtLeague(el.dataset.id).id;
    sub.hidden = open;
    (open ? courtList : lockedCourtList).appendChild(el);
    if (!open) locked++;
  }
  document.getElementById('lockedCourts').hidden = !locked;
  document.getElementById('lockedCourtLabel').textContent = `LOCKED COURTS · ${locked}`;
}

// --- THE IDENTITY SCREEN (the leagues, phase 1). First boot only: name + tour + colours, then
// ENTER THE CLUB. It writes the SAME stores the setup screen reads (pickedTour/Kit/Skin, their
// localStorage keys, stats' name key), so the two screens cannot disagree — which is why the rows
// are REBUILT on every visit: their .on states have to reflect taps made on the other screen.
const pName = document.getElementById('pName');
function buildPlayer() {
  document.getElementById('pGo').textContent = profile.prof.setup ? 'SAVE PLAYER' : 'ENTER THE CLUB';
  document.getElementById('pNote').hidden = !!profile.prof.setup;
  pName.value = stats.savedName() || profile.zombieName();
  const tRow = document.getElementById('pTours');
  tRow.innerHTML = '';
  for (const t of TOURS) {
    const b = document.createElement('button');
    b.className = t.id === pickedTour ? 'on' : '';
    b.textContent = t.name.replace(' SINGLES', '');
    b.addEventListener('click', () => {
      pickedTour = t.id;
      try { localStorage.setItem('tour', t.id); } catch {}
      for (const el of tRow.children) el.classList.toggle('on', el === b);
      refreshLook();
    });
    tRow.appendChild(b);
  }
  document.getElementById('pKitRow').innerHTML = '';
  document.getElementById('pSkinRow').innerHTML = '';
  swatches('pKitRow', 'pKitName', KITS, 'kit', () => pickedKit, id => pickedKit = id);
  swatches('pSkinRow', 'pSkinName', SKINS, 'skin', () => pickedSkin, id => pickedSkin = id);
  refreshLook();
}
document.getElementById('pDice').addEventListener('click', () => { pName.value = profile.zombieName(); });
function leavePlayer(saved) {
  const back = playerReturn; playerReturn = null;
  if (back === 'card') { buildCard(); go('card'); }
  else if (back === 'setup') go('setup');
  else if (back === 'cup' && saved) { pickMode('cup'); start('cup'); }
  else go('splash');
}
document.getElementById('pBack').addEventListener('click', () => leavePlayer(false));
document.getElementById('pGo').addEventListener('click', () => {
  stats.saveName(stats.tidyName(pName.value) || profile.zombieName());
  try { localStorage.setItem('tour', pickedTour); } catch {}
  profile.prof.setup = 1; profile.save(); profile.push();
  leavePlayer(true);
});
pName.addEventListener('keydown', e => { if (e.key === 'Enter') document.getElementById('pGo').click(); });

// --- court rows, built from the table.
// The two meters come out of the court's OWN bounce numbers rather than a pair of hand-written
// ratings, so a physics change moves the bars with it and the screen can never advertise a court
// that plays differently from what it says.
//   SPEED  how much pace survives the bounce — bounceXZ, grass .84 fastest, clay .70 slowest
//   BOUNCE how much of it comes back UP      — bounceY,  clay .66 highest,  grass .50 lowest
// The two divisors just stretch those narrow real ranges across a full bar; they carry no physics.
// the label is a TITLE, not a printed word (the text reduction): the legend stands once over the
// list — two bars in a fixed order need naming once, not on every row
const meter = (label, v, cls = '') =>
  `<div class="meter ${cls}" title="${label}"><s><i style="width:${
    Math.round(Math.min(1, Math.max(0.08, v)) * 100)}%"></i></s></div>`;
const courtList = document.getElementById('courtList');
const lockedCourtList = document.getElementById('lockedCourtList'), courtButtons = [];
// THE LEAGUES lock the courts: a court belongs to its league and unlocks for EVERY mode the
// moment you reach that league (settled: the unlock is the reward formula). A court no league
// names stays free forever.
const courtLeague = id => LEAGUES.find(l => l.court === id);
const courtUnlocked = id => { const l = courtLeague(id); return !l || l.id <= profile.prof.lg; };
for (const c of COURTS) {
  const b = document.createElement('button');
  b.className = 'court' + (c.id === picked ? ' on' : ''); // your last court comes up pre-picked
  b.dataset.id = c.id;
  b.innerHTML = `<img src="assets/${c.tile}.png?v=${SPRV}" alt=""><span class="cb">`
    + `<b>${c.name}</b><i hidden></i>`     // the sub only ever carries a LOCK now (syncSetup)
    + meter('SPEED', (c.bounceXZ - 0.62) / 0.26)
    + meter('BOUNCE', (c.bounceY - 0.44) / 0.28, 'b')
    + '</span>';
  // Tapping a tile SELECTS it and nothing more. It used to start the match on the spot, which gave
  // you no way to look at the three of them and no way back out of the screen.
  b.addEventListener('click', () => {
    if (!courtUnlocked(c.id)) return;      // locked: the row itself says which league opens it
    picked = c.id;
    try { localStorage.setItem('court', picked); } catch {}
    syncSetup();
  });
  courtButtons.push(b);
  courtList.appendChild(b);
}
// a remembered pick that is locked for THIS profile (fresh install, adopted mirror) falls back
// to the league's own court rather than serving up a court the player has not earned
if (!courtUnlocked(picked)) picked = leagueOf(profile.prof.lg).court;

// the portrait: every family's own head crop (assets/_heads.py), the club pro's included — the
// same file the in-play walk-on card uses, so the picker and the court show the same face
const foeArt = f => `assets/z_${f.fam}head.png?v=${SPRV}`;

// Training chooses the opponent first, then the shared setup confirms the court and starts.
let trainRung = 1;
const trainList = document.getElementById('trainList');
// rebuilt on entry (go('train')): you can only train who the club has let you meet — every rung
// up to the top of YOUR league's band. LADDER stays the cap for a maxed profile.
function buildTrain() {
  trainList.innerHTML = '';
  const top = Math.min(LADDER, leagueOf(profile.prof.lg).band[1]);
  // THE REVANCHE (THE SEASON): the body that ended your last cup attempt is marked and sits FIRST
  // in its own right — a practice list where every rung looks the same is a shelf, and this one
  // room in the game has an obvious reason to exist the moment you have just been put out.
  const out = profile.prof.out;
  const rung = n => {
    const f = matchFoe(n), b = document.createElement('button');
    b.addEventListener('click', () => { trainRung = n; go('setup'); });
    return [f, b];
  };
  // THE REVANCHE IS A ROW, not a tile in the grid (the text reduction): it is one body out of
  // eighteen and the only one with a reason, so it gets the width to say so — and says it in
  // three words, because the screen it sits on is already called TRAINING.
  if (out >= 1 && out <= top) {
    const [f, b] = rung(out);
    b.className = 'put';
    b.innerHTML = `<img src="${foeArt(f)}" alt=""><span><b>${f.name}</b><i>PUT YOU OUT</i></span>`
      + '<em>&gt;</em>';
    trainList.appendChild(b);
  }
  for (let n = 1; n <= top; n++) {
    if (n === out) continue;
    const [f, b] = rung(n);
    // the rung is a NUMBER on a list of numbers — two digits, no "No."
    b.innerHTML = `<img src="${foeArt(f)}" alt=""><b>${f.name}</b>`
      + `<i>${String(n).padStart(2, '0')}</i>`;
    trainList.appendChild(b);
  }
  // ...and the list ENDS somewhere: the next league's band is drawn as the goal it is, not left
  // to stop dead at the cap with no explanation (the handoff's "Ziel, keine Liste")
  if (top < LADDER) {
    const next = LEAGUES.find(l => l.band[0] > top);
    const goal = document.createElement('div');
    goal.className = 'goal';
    if (next) goal.innerHTML = `<b>LEAGUE ${next.id}</b><i>${next.band[0]} — ${next.band[1]}</i>`;
    trainList.appendChild(goal);
  }
}
document.getElementById('trBack').addEventListener('click', () => goMode());

// --- THE CHARACTER CARD (the leagues, phase 3). The splash's level strip is the door. The
// honours row is a COLLECTION: every slot always visible, earned badges bright, the rest dark —
// the empty slots are the incentive. The ledger reads the same stats module the BODY COUNT does.
const fig = (label, val) => `<div class="fig"><b>${label}</b><i>${val}</i></div>`;
// THE CARD COUNTS UP (Oliver): bars sweep in and every number climbs fast on entry. setTimeout,
// not rAF — the menu parks the game loop (the bracket's own rule). Timers are cancelled on the
// next build so a re-entry never races itself.
let cardTimers = [];
const countUp = (write, target, dur = 700) => {
  const t0 = performance.now();
  (function tick() {
    const p = Math.min(1, (performance.now() - t0) / dur);
    write(Math.round(target * (1 - Math.pow(1 - p, 3))));   // easeOutCubic: fast, then settles
    if (p < 1) cardTimers.push(setTimeout(tick, 30));
  })();
};
// A SHIELD CATCHES THE LIGHT (2026-08-31, Oliver: not burning — "manchmal random schimmern").
// The first cut was a chimney of embers, which read as a fire on a trophy. This is the opposite:
// Three points ON the shield: the first catches the light within a second of opening the card,
// then the long, varied cycles keep it occasional. CSS keyframes, no game loop.
const glints = won => !won ? '' : Array.from({ length: 3 }, (_, i) =>
  `<em style="left:${(18 + Math.random() * 60).toFixed(0)}%;` +
  `top:${(12 + Math.random() * 52).toFixed(0)}%;` +
  `animation-delay:${(0.15 + i * 0.6 + Math.random() * 0.3).toFixed(2)}s;` +
  `animation-duration:${(6 + Math.random() * 5).toFixed(2)}s"></em>`).join('');

function buildCard() {
  for (const t of cardTimers) clearTimeout(t);
  cardTimers = [];
  const lg = leagueOf(profile.prof.lg), pr = profile.progress();
  document.getElementById('cdName').textContent = stats.savedName() || 'THE WALK-ON';
  document.getElementById('cdBadge').src = `assets/badge_l${lg.id}.png?v=${SPRV}`;
  const el = document.getElementById('cdLeague');
  // the crest stands beside this line now, and the column is narrow: two short lines beat one
  // that wraps three times (the league's NAME is the second, in its own colour)
  el.innerHTML = `LEAGUE ${lg.id} OF ${LEAGUES.length}<i>${lg.name}</i>`;
  el.style.color = lg.color;
  // ...and the cap belongs to the bar under it, which already counts toward the next level
  document.getElementById('cdLevel').textContent = 'LEVEL ' + pr.level;
  document.getElementById('cdFrom').textContent = pr.level;
  document.getElementById('cdTo').textContent = pr.need ? pr.level + 1 : 'MAX';
  // both bars sweep from empty to their mark (the 0.7s eased transition in the CSS)
  for (const [id, w] of [['cdFill', Math.round(pr.frac * 100)],
                         ['cdCareerFill', Math.min(100, Math.round(profile.prof.xp / profile.xpFor(profile.LEVEL_CAP) * 100))]]) {
    const bar = document.getElementById(id);
    bar.style.transition = 'none'; bar.style.width = '0%';
    void bar.offsetWidth;                                  // commit the empty bar before the sweep
    bar.style.transition = '';
    cardTimers.push(setTimeout(() => { bar.style.width = w + '%'; }, 40));
  }
  const xpTail = pr.need
    ? ' · ' + (pr.need - pr.into).toLocaleString('en-GB') + ' TO LEVEL ' + (pr.level + 1)
    : ' · THE CAP';
  const cdXp = document.getElementById('cdXp');
  countUp(v => cdXp.textContent = v.toLocaleString('en-GB') + ' XP' + xpTail, profile.prof.xp);
  const row = document.getElementById('cdBadges');
  row.innerHTML = '';
  for (const l of LEAGUES) {
    // a league's badge is EARNED by finishing it — winning its cup. Being past it means exactly
    // that; league five has no "past", so its shield lights with the champion's crown.
    const won = l.id < profile.prof.lg || (l.id === LEAGUES.length && profile.prof.ch);
    const at = profile.cupAt(l.id);
    const cell = document.createElement('div');
    cell.className = 'badge' + (won ? '' : ' dark');
    // THE INSCRIPTION (2026-08-31, the cup board): a trophy says when it was won. Here that is the
    // LEVEL it was won at — the number the cup board breaks its ties on, in the one place where a
    // figure set once and never again belongs.
    // an unearned slot says nothing: the shield's own art already says which league it is
    cell.innerHTML = `<img src="assets/badge_l${l.id}.png?v=${SPRV}" alt="" title="${l.name}">`
      + `<u>${won ? (at ? 'AT ' + at : 'WON') : '—'}</u>` + glints(won);
    row.appendChild(cell);
  }
  const champ = document.createElement('div');
  champ.className = 'badge' + (profile.prof.ch ? '' : ' dark');
  champ.innerHTML = `<img src="assets/badge_champ.png?v=${SPRV}" alt="" title="CHAMPION OF THE DEAD CLUB">`
    + `<u>${profile.prof.ch ? 'CHAMPION' : '—'}</u>` + glints(profile.prof.ch);
  row.appendChild(champ);
  const rows = [['LEAGUE', profile.prof.lg], ['CUPS WON', profile.prof.lg - 1 + profile.prof.ch],
                ['BEST CUP', profile.cupBest(profile.prof.lg)]];
  const box = document.getElementById('cdFigs1');
  box.innerHTML = rows.map(([label]) => fig(label, '0')).join('');
  [...box.querySelectorAll('.fig i')].forEach((cell, i) => {
    countUp(v => cell.textContent = v.toLocaleString('en-GB'), rows[i][1]);
  });
  buildLeaguePanel();
  refreshLook();
}
document.getElementById('plaque').addEventListener('click', () => { buildCard(); go('card'); });
document.getElementById('cdBack').addEventListener('click', () => go('splash'));
let playerReturn = null;   // The editor returns to its caller; first-time cup entry resumes the cup.
document.getElementById('cdEdit').addEventListener('click', () => {
  playerReturn = 'card'; buildPlayer(); go('player');
});
document.getElementById('sEdit').addEventListener('click', () => {
  playerReturn = 'setup'; buildPlayer(); go('player');
});

// --- THE PROMOTION CEREMONY (the leagues). beats.cupWon parks it in the profile module; the tap
// off the cup summary lands here (maybeRestart) before the title screen. The court tile IS the
// reward on screen; the name prompt, if the run also earned one, queues behind the ceremony.
let promoRun = null;
function buildPromo(pr, run) {
  promoRun = run || null;
  const lg = leagueOf(profile.prof.lg);
  const c = COURTS.find(x => x.id === lg.court) || COURTS[0];
  const champion = !!pr.champion;
  document.getElementById('prTag').textContent = champion ? 'THE FINAL CUP IS YOURS' : 'THE CUP IS YOURS';
  document.getElementById('prTitle').textContent = champion ? 'CHAMPION.' : 'PROMOTED.';
  document.getElementById('prLeague').textContent = champion
    ? 'THE DEAD CLUB HAS NOBODY LEFT'
    : `LEAGUE ${lg.id} OF ${LEAGUES.length} — ${lg.name}`;
  document.getElementById('prCourt').src = `assets/${c.tile}.png?v=${SPRV}`;
  document.getElementById('prCourtName').textContent = champion
    ? 'THE HONOURS BOARD REMEMBERS YOUR NAME'
    : `NEW COURT UNLOCKED — ${c.name} · OPEN IN EVERY MODE`;
  document.getElementById('prGo').textContent = champion ? 'TAKE A BOW' : 'WALK ON';
  // ...and what the new league has you down for. The champion has nothing above him, so his beat
  // is the title he now has to hold instead of a fixture he has to win.
  const fx = cupFixture(profile.prof.lg, profile.prof.ch);
  document.getElementById('prNext').innerHTML = champion
    ? `THE TITLE IS YOURS TO HOLD<u>EVERY CUP FROM HERE IS A DEFENCE</u>`
    : `NEXT: ${fx.title}<u>${fx.line}</u>`;
}
// THE CUP BOARD (2026-08-31): a promotion is the row, and it posts itself. There is no name
// prompt in the way — you have had a name since the identity screen — and no personal-best gate:
// the server keeps one row per name per board and the league you just took either beats what
// stands there or does not (rank_key, server.py).
function postCup(pr) {
  const took = pr.champion ? LEAGUES.length : pr.took;
  if (!took || !pr.at || !stats.savedName()) return;
  stats.submit(stats.savedName(), took, pr.at, stats.MODE_CUP, profile.prof.lg).catch(() => {});
}
document.getElementById('prGo').addEventListener('click', () => {
  const run = promoRun; promoRun = null;
  if (run && run.newKillBest && run.score > 0) askName(run);
  else go('splash');
});

// Open an existing world board. Classic has no leaderboard; its fallback is Gore.
const boardFor = m => m === 'cup' ? stats.MODE_CUP
  : m === 'zombie' || m === 'train' ? stats.MODE_MATCH : stats.MODE_GORE;

// The splash plaque opens the profile and its stats; the world board has its own door.
// Re-read on each arrival because the preceding run may have moved the level or league.
function refreshSplash() {
  // THE PLAQUE — the meta identity, re-read whenever the splash comes back because a run has just
  // moved it. One row now: crest, name and level, and the bar
  // under them wearing the level it fills toward. The goal LINE is gone — the fixture button below
  // says what to do, and it said it twice.
  const pr = profile.progress(), lg = leagueOf(profile.prof.lg);
  document.getElementById('plBadge').src = `assets/badge_l${lg.id}.png?v=${SPRV}`;
  document.getElementById('plName').textContent = stats.savedName() || 'YOUR PLAYER';
  document.getElementById('plLv').textContent = 'LEVEL ' + pr.level;
  document.getElementById('plTo').textContent = pr.need ? pr.level + 1 : 'MAX';
  document.getElementById('plFill').style.width = Math.round(pr.frac * 100) + '%';
  // THE FRONT DOOR (THE SEASON): the fixture, in the same words the summary and the promotion use
  // (config.cupFixture) — minus the round count, which lives in the tournament's own modal now.
  const fx = cupFixture(profile.prof.lg, profile.prof.ch);
  document.getElementById('msTitle').textContent = fx.title;
  document.getElementById('msLine').textContent = fx.line;
  document.getElementById('mCourt').textContent = 'COURT · ' +
    (COURTS.find(c => c.id === picked) || COURTS[0]).name;
}


// `modeId` is the mode to drop into. It defaults to what the setup screen picked — but the BACK
// ROOM passes null, because those entries bring their own mode and a remembered ZOMBIE TENNIS was
// taking the court before startDrill/startBench/toggleTestMode could, so every one of them silently
// refused. The sprite bench found this the first time it was opened.
function start(modeId = pickedMode) {
  if (!menuUp()) return;
  selectTour(pickedTour);
  selectKit(pickedKit); selectSkin(pickedSkin);
  // THE LEAGUES: the CUP is the league fixture and plays the league's own court; every other
  // mode — the climb included, it is an exhibition — plays your pick (among the unlocked).
  selectCourt(modeId === 'cup' ? leagueOf(profile.prof.lg).court : picked);
  menuDuck(true); // the theme belongs to the menus — hand the court over to the ambience
  intro.hidden = true; ambient(); voice('quiet_please'); // low atmosphere bed starts with the first gesture
  // ...and the mode the setup screen picked. THREE LINES, because that is genuinely all the modes
  // differ by at this point: gore is the game as it always was, classic is the same tennis with the
  // turn switched off, and zombie tennis is the match taking the court. Everything else about a mode
  // lives in the code that reads G.classic / G.match, never here.
  quitChip.hidden = false;               // the door out rides every run (see the quit block below)
  G.classic = modeId === 'classic';
  // the difficulty rides on G like G.classic does, so a mid-run restart keeps the CPU you chose
  G.diff = G.classic ? (DIFFS.find(d => d.id === pickedDiff) || DIFFS[1]) : null;
  if (modeId === 'gore') startGore();   // no tennis prologue: the mode you picked is the mode you get
  if (modeId === 'zombie') { intoSplatter(); startMatch(); }
  // the cup rolls its own draw per round (cupDraw, without replacement) — the bracket screen
  // that used to settle it on-screen is gone (2026-08-29, see the foeArt note above).
  if (modeId === 'cup') { intoSplatter(); startMatch(true); }   // cupDraw shuffles per round
  // training: the picked rung rides the match machinery with the ladder parked (beats.startMatch)
  if (modeId === 'train') { intoSplatter(); startMatch(false, null, trainRung); }
}

// Career totals and detailed records live one level beneath the profile.
const openStats = () => {
  stats.drawStats('all', SPRV); go('stats');
};

// A phone can record without a console. Opt in from Stats or ?record=1; export is local/share
// sheet only. Keep this off the normal splash and give active recordings one small live marker.
const recordingMeta = () => ({
  build: document.querySelector('script[src*="main.js"]').getAttribute('src'),
  viewport: [innerWidth, innerHeight], pixelRatio: devicePixelRatio,
  touch: matchMedia('(pointer: coarse)').matches,
});
function refreshRecorder() {
  const r = recorder.recordingInfo();
  document.getElementById('recLabel').textContent = 'PLAYTEST RECORDING' + (r.full ? ' · FULL' : r.active ? ' · ON' : '');
  document.getElementById('recStatus').textContent = r.warning || (r.full
    ? 'Recording full. Export it, then start a new recording.'
    : (r.active ? 'Recording' : r.exists ? 'Paused' : 'Off') + ' · ' + r.points + ' points saved on this phone.');
  document.getElementById('recToggle').textContent = r.active ? 'STOP RECORDING' : r.exists ? 'RESUME RECORDING' : 'RECORD PLAYTEST';
  document.getElementById('recToggle').disabled = r.full;
  document.getElementById('recExport').disabled = !r.events;
  document.getElementById('recNew').hidden = !r.exists || r.active;
  const lamp = document.getElementById('recLamp');
  lamp.hidden = !r.active && !r.full;
  lamp.textContent = r.full ? 'REC FULL' : 'REC';
}
recorder.onRecorderChange(refreshRecorder);
document.getElementById('recToggle').addEventListener('click', () => {
  const r = recorder.recordingInfo();
  if (!r.exists) recorder.beginRecording(recordingMeta());
  else recorder.setRecording(!r.active, recordingMeta());
});
document.getElementById('recNew').addEventListener('click', () => recorder.beginRecording(recordingMeta()));
document.getElementById('recExport').addEventListener('click', async () => {
  try {
    const result = await recorder.exportRecording();
    if (result === 'download') document.getElementById('recStatus').textContent = 'Download requested. Your recording is also kept on this phone.';
  } catch {
    document.getElementById('recStatus').textContent = 'Export could not open. Your recording is kept; please try again.';
  }
});
if (new URLSearchParams(location.search).get('record') === '1') {
  if (recorder.recordingInfo().exists) recorder.setRecording(true, recordingMeta());
  else recorder.beginRecording(recordingMeta());
}
refreshRecorder();
document.addEventListener('visibilitychange', () => {
  if (document.visibilityState === 'hidden') {
    recorder.recordEvent('run_end', { outcome: 'backgrounded' }); recorder.saveRecording();
  }
});
addEventListener('pagehide', () => recorder.saveRecording());
const goMode = () => { buildTops(); go('mode'); };
document.getElementById('mStart').addEventListener('click', () => {
  if (!profile.prof.setup) { playerReturn = 'cup'; buildPlayer(); go('player'); return; }
  pickMode('cup'); start('cup');
});
document.getElementById('mOther').addEventListener('click', goMode);
document.getElementById('mVs').addEventListener('click', () => vsOpen());
document.getElementById('mGore').addEventListener('click', () => {
  pickMode('gore'); start('gore');
});
document.getElementById('mCourt').addEventListener('click', () => {
  pickMode('gore'); go('setup');
});
document.getElementById('cdStats').addEventListener('click', openStats);
// the world board opens on the mode you last PICKED, like the stats screen does — that is the one
// whose names you came to look at
let rkMode = stats.MODE_GORE;
const openRanks = () => {
  rkMode = boardFor(pickedMode);
  for (const el of document.getElementById('rkModes').children) el.classList.toggle('on', el.dataset.m === rkMode);
  go('ranks'); stats.drawRanks(null, rkMode);
};
document.getElementById('mRanks').addEventListener('click', openRanks);
document.getElementById('rkModes').addEventListener('click', e => {
  const b = e.target.closest('button'); if (!b) return;
  rkMode = b.dataset.m;
  for (const el of e.currentTarget.children) el.classList.toggle('on', el === b);
  stats.drawRanks(null, rkMode);
});

// --- THE NAME PROMPT. It appears on exactly one occasion: a run that beat your own best on ITS
// OWN board (every mode has one now), on the tap that takes you off the death screen. Anything
// more often is a form standing between you and the next match.
const nbName = document.getElementById('nbName'), nbMsg = document.getElementById('nbMsg');
let nbRun = null;
function askName(run) {
  nbRun = run;
  const B = stats.BOARDS[run.mode] || stats.BOARDS[stats.MODE_GORE];
  // the prompt names the BOARD's number, not the gore mode's — a tournament run that said
  // "5 KILLS" would be describing something nobody was playing for
  document.getElementById('nbScore').innerHTML =
    `<b>${run.score.toLocaleString('en-GB')}</b> ${B.unit} · <b>${run.sub}</b> ${B.subUnit}`;
  nbName.value = stats.savedName();
  nbMsg.textContent = 'PUT IT ON THE WORLD BOARD.';
  document.getElementById('nbSend').disabled = false;
  go('newbest');
  // focus only where a keyboard is already there. On a phone this would throw the soft keyboard up
  // over the score you just earned, before you have read it.
  if (!matchMedia('(pointer: coarse)').matches) nbName.focus();
}
document.getElementById('nbSkip').addEventListener('click', () => { nbRun = null; go('splash'); });
document.getElementById('nbSend').addEventListener('click', async () => {
  const name = stats.tidyName(nbName.value);
  if (!name) { nbMsg.textContent = 'A NAME FIRST.'; nbName.focus(); return; }
  nbName.value = name;   // show what is actually going on the board
  if (!nbRun) return go('splash');
  const btn = document.getElementById('nbSend');
  btn.disabled = true; nbMsg.textContent = 'SENDING…';       // the double-tap posts twice otherwise
  try {
    const r = await stats.submit(name, nbRun.score, nbRun.sub, nbRun.mode, profile.prof.lg);
    rkMode = nbRun.mode;         // ...and the board that opens is the one you just wrote your name on
    for (const el of document.getElementById('rkModes').children)
      el.classList.toggle('on', el.dataset.m === rkMode);
    nbRun = null;
    go('ranks');
    stats.drawRanks(r.scores, rkMode);   // the board came back with the reply — no second round trip
  } catch (e) {
    btn.disabled = false;
    nbMsg.textContent = e.taken ? 'THAT NAME IS SPOKEN FOR. PICK ANOTHER.'
                                : 'THE BOARD DID NOT ANSWER. TRY AGAIN?';
    if (e.taken) { nbName.select(); nbName.focus(); }
  }
});
nbName.addEventListener('keydown', e => { if (e.key === 'Enter') document.getElementById('nbSend').click(); });
// () => start(), NEVER `start` — addEventListener hands the listener a MouseEvent as its first
// argument, so `start(modeId = pickedMode)` never saw its default and modeId was an EVENT OBJECT.
// `G.classic = modeId === 'classic'` was therefore always false and the zombie branch never fired:
// SERVE UP dropped you into the gore mode whatever the setup screen said, and picking CLASSIC or
// ZOMBIE TENNIS did nothing at all. A default parameter only applies to `undefined`, and a click
// handler always passes something.
// Every setup's primary button starts exactly the match shown above it.
document.getElementById('cStart').addEventListener('click', () => start());
for (const id of ['mBack', 'rkBack', 'scBack'])
  document.getElementById(id).addEventListener('click', () => go('splash'));
document.getElementById('stBack').addEventListener('click', () => { buildCard(); go('card'); });
document.getElementById('sBack').addEventListener('click', () => {
  if (pickedMode === 'gore') go('splash');
  else if (pickedMode === 'train') go('train');
  else goMode();
});
document.getElementById('bsBack').addEventListener('click', () => go('secret'));

// SWIPE TO GO BACK — RIGHTWARD, the way iOS's own pop gesture goes (Oliver, 2026-08-20: *"that's
// the iOS way"*). Every screen but the splash wears exactly one chevron in its header (.hdr in
// index.html) and that button ALREADY knows where back is for its own screen — the wizard's shape
// lives in the handlers above and nowhere else. So the gesture finds the one visible chevron and
// clicks it, rather than keeping a second map that would drift the first time a stage is added.
// A screen with no chevron (splash, newbest) has nowhere to go and the swipe is simply ignored.
// Touch only: a trackpad two-finger scroll is not a swipe and must not navigate.
const SWIPE_MIN = 60;   // px of travel before it counts — a tap that slides is not a swipe
let swipe = null;
intro.addEventListener('touchstart', e => {
  swipe = e.touches.length === 1 ? { x: e.touches[0].clientX, y: e.touches[0].clientY } : null;
}, { passive: true });
intro.addEventListener('touchend', e => {
  const from = swipe; swipe = null;
  if (!from || e.touches.length) return;
  const t = e.changedTouches[0];
  const dx = t.clientX - from.x, dy = t.clientY - from.y;
  // rightward, and clearly horizontal: the stats and board screens scroll vertically under the finger
  if (dx < SWIPE_MIN || Math.abs(dy) > Math.abs(dx) * 0.7) return;
  const back = [...intro.querySelectorAll('.chev')].find(b => b.offsetParent); // the one on screen
  if (!back) return;
  // NOT passive, and this is why: a swipe that starts and ends inside one of the big poster cards
  // still produces that card's click, which would answer the screen forward in the same frame the
  // chevron walked it back. preventDefault on touchend cancels the compatibility mouse events, so
  // the gesture means one thing only.
  e.preventDefault();
  haptic('select');
  back.click();
});

// ---- THE BACK ROOM: five taps in the TOP-LEFT CORNER of the splash (#hot, an invisible box in
// index.html), and nothing on the screen says so. It replaces the triple-tap on the in-play
// scoreboard, which sat on top of the miss-log tap and which the testteam kept opening by accident.
// The corner rather than the logo: on the way to PLAY MATCH your thumb crosses the middle of the
// splash all the time, and a hidden door you can open by accident is just a bug with a secret.
let logoTaps = [];
document.getElementById('hot').addEventListener('pointerdown', () => {
  const now = performance.now();
  logoTaps = logoTaps.filter(t => now - t < 2000);
  logoTaps.push(now);
  if (logoTaps.length >= 5) { logoTaps = []; go('secret'); }
});

// Both entries drop you into a REAL run rather than a special mode — same update loop, same
// scoring, same death — which is the only way a test tells you anything about the game.
// This is laserScene's trick: force the turn and then step the transition out in one go, because
// the cinematic is ten seconds you did not come here to watch.
function intoSplatter() {
  startGore();   // the direct door. It used to force the turn and then step the whole 8-second
                 // cinematic out in 900 hidden updates — every sound it makes fired in one frame.
  G.modal = null; G.horde = null; G.hordeWarn = 0; G.interlude = false; G.changeover = 0; G.clearing = false;
  G.mgT = 0; G.gunId = null; G.beam = null; G.hp = G.hpMax = TUNE.playerHp;
  zombies.length = 0; shots.length = 0; pellets.length = 0;
  score.server = 'P'; setupPoint();
}
netHooks.intoSplatter = intoSplatter; // netplay's death match enters splatter through the same hack
document.getElementById('scWeapons').addEventListener('click', () => {
  start(null); intoSplatter(); toggleTestMode();
});
document.getElementById('scBosses').addEventListener('click', () => go('bosses'));
// THE DRILL, from the back room — the cognitive mode's feel-test. Like the two above it drops
// into a real run first (same loop, same contact rules) and then hands the court to startDrill,
// which refuses if anything else still owns it.
document.getElementById('scDrill').addEventListener('click', () => {
  start(null); intoSplatter();
  startDrill();
});
document.getElementById('scMatch').addEventListener('click', () => {
  start(null); intoSplatter();
  startMatch();
});
// (netplay has no back-room button: the VS A FRIEND poster on the mode screen IS the door, and
//  #net / #net-CODE below covers sending a phone straight in from a URL)
// THE SPRITE BENCH — the art test. Same "drop into a real run first" trick as its neighbours, so the
// body is drawn by the real renderer at the real size, on the real court, under the real palette.
// Judging a walk cycle anywhere else is judging a different picture.
document.getElementById('scBench').addEventListener('click', () => {
  start(null); intoSplatter();
  startBench();
});

// The list is built by ASKING bossArt which design each chapter gets, so it can never drift from
// what the run actually spawns — including the champion sitting on chapter 10 rather than 7.
const bossList = document.getElementById('bossList');
for (let ch = 1; ch <= 10; ch++) {
  const art = bossArt(ch), b = document.createElement('button');
  b.innerHTML = `<img src="assets/${art.walk[0]}.png?v=${SPRV}" alt="">`
    + `<b>${art.name}</b><i>CHAPTER ${ch} · GAME ${ch * TUNE.bossEvery}</i>`;
  b.addEventListener('click', () => {
    start(null); intoSplatter();
    G.runGames = ch * TUNE.bossEvery;   // the roster, the HUD and the spawn ramp all read this one
    G.bossDue = 0;                      // ...and the schedule must not queue a SECOND fight behind it
    for (const id of Object.keys(WEAPONS)) grantWeapon(id, TUNE.wCap); // full arsenal, every tin
    G.weapon = 0;
    startBossFight(ch);
  });
  bossList.appendChild(b);
}
// the three period tabs are one listener on the strip — the button carries the period in data-p
// the two tab strips are one listener each — the button carries its value in a data attribute
refreshSplash();
// the profile mirror: adopt a server copy that is ahead (a wiped phone, a second device), then
// let the plaque show whatever came back. The BOOT GATE holds the splash locked (skeleton
// plaque, no buttons, no keys) until this settles — capped at 4 s, because a dead network must
// never park the player on the title (the sprite loader's own rule).
let profileDone = false;
profile.pull().then(() => { profileDone = true; refreshSplash(); });
setTimeout(() => { profileDone = true; }, 4000);

// THE BOOT GATE. render.js fires all ~230 sprite requests at import; this only watches them and
// keeps the splash's buttons out of reach until the last one has landed and both faces are ready.
// Without it a cold start could open the stats screen — which hangs <img> tags on the same files —
// or start a rally while half the sheets were still in flight, and the missing ones drew as
// whatever the fallback was. onerror counts too (render.js), so a dead network still finishes the
// bar rather than parking the player on it forever.
const splash = document.getElementById('splash'), bootFill = document.querySelector('#boot i');
splash.classList.add('busy');   // belt and braces: the class ships in index.html so the very
                               // first paint is already the loading state — this only matters if
                               // that ever gets dropped from the markup
const loaded = () => !splash.classList.contains('busy');
// setInterval, NOT requestAnimationFrame: rAF does not fire in a hidden tab, and a phone that
// launches the app and locks — or an install that loads in the background — would come back to a
// bar frozen at whatever it reached and a menu with no buttons on it. An interval still ticks
// (throttled to about a second), so the gate always opens.
const tick = setInterval(function watchLoad() {
  const frac = LOAD.total ? LOAD.done / LOAD.total : 1;
  bootFill.style.width = (frac * 100).toFixed(1) + '%';
  if (frac < 1 || !profileDone) return; // sprites AND the profile mirror (or its 4 s cap)
  clearInterval(tick);
  // fonts.ready resolves once nothing is pending — including the three faces warmed above — so the
  // first canvas frame is never the system serif.
  (document.fonts ? document.fonts.ready : Promise.resolve())
    .then(() => { splash.classList.remove('busy'); dealStage('splash'); });
}, 100);

// THE FIRST TAP ANYWHERE ON THE OVERLAY STARTS THE THEME, and does nothing else — the screens have
// real buttons now. This is the gesture the autoplay policy is waiting for, which is why the theme
// is not started at boot. menuMusic itself is a no-op once the bed exists (loopBed's beds.has
// guard), so coming back from a run picks up the track already playing rather than restarting it.
intro.addEventListener('pointerdown', e => { menuMusic(); if (e.target.closest('button')) haptic('select'); });
// which build am I looking at? Push = deploy and the browser cannot see git, so the served file's
// own timestamp IS the version marker — it changes on every deploy, with nothing to remember to bump.
// Match it against `git log -1 --format=%cd` when a phone looks suspiciously out of date.
fetch('src/main.js', { method: 'HEAD' }) // page-relative: index.html sits at the root, the code in src/
  .then(r => { const t = r.headers.get('last-modified'); if (!t) return;
    document.getElementById('build').textContent = 'BUILD ' + new Date(t).toLocaleString('en-GB').replace(',', ''); })
  .catch(() => {}); // no header, no line — never a broken start screen
// Keyboard, per stage. On the splash Enter/Space goes to setup and S opens the stats; on the setup
// screen 1..N picks a court and Enter starts; Escape backs out to the splash from anywhere.
addEventListener('keydown', e => {
  if (!menuUp()) return;
  menuMusic(); // a key is a gesture too — unlock the theme on a desktop that never taps
  const stage = intro.dataset.stage;
  if (stage === 'splash' && !loaded()) return; // the boot gate holds the keys too
  if (e.key === 'Escape') return go('splash');
  if (stage === 'splash') {
    if (!loaded()) return;               // the boot bar hides the buttons; a key must not walk past it
    if (e.key === 'Enter' || e.key === ' ') goMode();
    else if (e.key === 's' || e.key === 'S') openStats();
    return;
  }
  if (stage !== 'setup') return;   // stats and ranks are read-only: Escape is the whole interface
  const n = parseInt(e.key, 10);
  if (n >= 1 && n <= COURTS.length) courtList.children[n - 1].click();
  // through the BUTTON, not start() — the cup's draw screen sits between the two and a keyboard
  // must not be the one way to walk past it
  else if (e.key === 'Enter' || e.key === ' ') document.getElementById('cStart').click();
});

// A run the player walks out on is still a run. killPlayer banks a death; this banks everything
// else — the tab closed mid-match, the phone's browser killed in the background. `pagehide` is the
// one that actually fires on iOS, where beforeunload/unload do not. endRun is idempotent and
// no-ops on an empty run, so closing the tab at the menu writes nothing.
addEventListener('pagehide', () => {
  profile.push();  // mirror whatever the run has earned — keepalive lets it survive the unload
  if (G.mode !== 'splatter') return;
  if (G.drill) return;                  // the drill banks nothing — its kills leak into the gore
                                        // bag otherwise (killPlayer's drill guard covers death,
                                        // not the tab-close path)
  if (G.match && G.match.train) return; // the training court banks nothing, walked out on or not
  // ...tagged with the mode that was being played, and carrying THAT mode's two headline numbers —
  // see the record-shape note in stats.endRun. A match abandoned mid-rally is a match run.
  if (G.match) stats.endRun(G.match.cup ? G.match.cup.round : (G.match.felled ?? Math.max(0, G.match.opp - 1)),
                            score.games[0] + score.games[1], G.splatT, false, stats.MODE_MATCH);
  else stats.endRun(G.runGames, G.sets[0], G.splatT, false);
});

// eaten: any tap or key returns to the title — but only once the death animation has played out, so
// a panic tap during the gore burst can't skip it. A modal owns its own gesture (see input.js).
// NOT a page reload any more: that reset everything honestly but also tore down the AudioContext, so
// the theme restarted from silence. restartRun puts every bag back from a pristine copy, and the
// bed that has been playing under the death summary simply carries on into the title screen.
const maybeRestart = e => {
  // ...and the classic ending taps out the same way, on its own shorter clock (G.done, no corpse)
  const ready = G.done ? G.done.t > DONE_RESTART : G.mode === 'eaten' && G.eatenT > EATEN_RESTART;
  if (G.modal || !ready) return;
  // WHICH DOOR (THE SEASON: "das ende reicht weiter"). The summary lays its own buttons out as it
  // draws — it measures its box, so only it knows where they landed — and hands the rects back
  // through endHit. A tap anywhere ELSE is the old behaviour exactly: back to the club.
  let door = null;
  if (e && e.clientX !== undefined) {
    const r = cv.getBoundingClientRect();
    door = endHit((e.clientX - r.left) / r.width, (e.clientY - r.top) / r.height);
  }
  // THE REMATCH is the one door that does not end the run here: the socket is still up, so net.js
  // resets both phones itself and the menu never comes back. It refuses (and falls through to the
  // clubhouse) if the friend has already hung up.
  if (door === 'rematch' && netAgain()) return;
  restartRun();
  profile.push();           // the run's xp is banked — mirror it while the moment is quiet
  refreshSplash();          // the run just ended: the splash count has moved
  intro.hidden = false;
  quitChip.hidden = true;   // the door out goes with the run it belonged to
  // stats.lastRun() survives restartRun on purpose — it lives in the stats module, not on G, which
  // has just been restored from PRISTINE. Consumed on read, so the prompt appears once.
  const run = stats.lastRun();
  // THE PROMOTION plays first (the leagues): the ceremony the cup win parked, then the name
  // prompt it may also have earned (prGo hands the run on), then the title.
  const promo = profile.takePromo();
  if (promo) { postCup(promo); buildPromo(promo, run); go('promo'); return; }
  // ...on the BOARD's number, not on kills: a classic match has none, so the gore-shaped test here
  // silently barred two of the three modes from ever reaching the prompt
  // ...on a board that still EXISTS: classic tennis left the world board with the stats streamline
  // (out of competition, by its own room's rule), so a classic best has nowhere to be written
  if (run && run.newKillBest && run.score > 0 && run.mode !== stats.MODE_CLASSIC) { askName(run); return; }
  // the fixture button restarts the canonical path without a detour through the menus; PLAY AGAIN
  // re-deals the mode that just ended (pickedMode is what started it, cup included)
  if (door === 'next') { pickMode('cup'); start('cup'); return; }
  if (door === 'again') { start(pickedMode); return; }
  go('splash');
};
cv.addEventListener('pointerdown', maybeRestart);
addEventListener('keydown', maybeRestart);

// THE DOOR OUT (Oliver: every tennis screen lacked an exit — force-closing the app was the only
// way back). The chip shows for the whole run; tapping it (or Escape on desktop) freezes the
// world and asks. Quitting is the death path minus the death: restartRun resets everything and
// nothing is banked — an abandoned run never happened, statistically.
const quitChip = document.getElementById('quit'), qAsk = document.getElementById('qAsk');
document.getElementById('qChip').addEventListener('click', () => { paused = true; qAsk.hidden = false; });
document.getElementById('qNo').addEventListener('click', () => { qAsk.hidden = true; paused = false; });
document.getElementById('qYes').addEventListener('click', () => {
  qAsk.hidden = true; paused = false; quitChip.hidden = true;
  restartRun();
  profile.push();  // a quit banks no run, but the xp already awarded is real — mirror it
  refreshSplash();
  intro.hidden = false;
  go('splash');
});
addEventListener('keydown', e => {
  if (e.key !== 'Escape' || !intro.hidden || quitChip.hidden) return;
  qAsk.hidden = !qAsk.hidden;
  paused = !qAsk.hidden;
});

// A tap on the SCOREBOARD toggles the miss-log overlay, and that is now all it does. The triple-tap
// that opened test mode has moved to the back room on the splash (see below): a cheat you can trip
// by accident mid-run is a bug, and this one sat on the one thing you tap to read the log.
cv.addEventListener('pointerdown', e => {
  const r = cv.getBoundingClientRect();
  const x = (e.clientX - r.left) / r.width * (cv.width / RES);  // logical coords
  const y = (e.clientY - r.top) / r.height * (cv.height / RES);
  if (x >= 6 && x <= 138 && y >= 6 && y <= 36) G.logShow = !G.logShow; // the scoreboard
});



// ---- A POSED SCENE for tuning a shot: `T.laserScene()`, or load with #laser. Six bodies of
// different types at known depths, the laser armed, a pull held.
// IT DOES NOT PAUSE, deliberately. The first version froze the world so the picture would hold
// still — and then every TUNE value you changed did nothing visible, because nothing redrew. The
// bodies are held still individually (v = 0) and spawning is off instead, so the picture is stable
// while the render loop keeps running and an edit shows on the very next frame.
function laserScene() {
  const intro = document.getElementById('intro');
  if (intro) intro.hidden = true;
  paused = false;
  if (G.mode === 'tennis') forceZombies();
  for (let i = 0; i < 600; i++) update(1 / 60);      // ride the transition out into splatter
  G.modal = null; G.horde = null; G.hordeWarn = 0; G.interlude = false; G.changeover = 0; G.clearing = false;
  G.mgT = 0; G.gunId = null; G.beam = null; G.bossFight = 0; G.hp = G.hpMax = TUNE.playerHp;
  zombies.length = 0; pellets.length = 0; parts.length = 0; gore.length = 0; piles.length = 0;
  score.server = 'P'; setupPoint();
  P.x = 0;
  TUNE.zMax = 0;                                     // nothing new wanders into the shot
  for (const [x, z, v] of [[0, 20, 'a'], [0.75, 16, 'b'], [-0.85, 12, 'k'],
                           [0.85, 8.5, 'g'], [-0.75, 5.5, 'h'], [0, 3, 'e']]) {
    spawnZombie(x, z, v);
    zombies[zombies.length - 1].v = 0;               // held still: the scene is a photograph
  }
  G.rack.length = 0; G.temp = null;
  G.weapon = grantWeapon('laser');
  G.modal = null;
  G.aim = { fx: 0, fy: -1, mag: 100 };               // a full pull straight up-court (fy is NEGATIVE)
  return 'posed and LIVE — change TUNE (T panel or console) and it redraws. T.laserFire() to shoot it.';
}
// fire the posed shot, then pose it again so you can keep tuning
function laserFire() {
  G.aim = null; score.server = 'P'; setupPoint();
  keyPressed('Space');
  return 'fired — T.laserScene() to re-pose';
}
// a plain timer, not the load event: this module runs as a module, so `load` may already have gone
if (location.hash === '#laser') setTimeout(laserScene, 600);
// #drill — the same door from a URL, so a phone can be sent straight into the mode
if (location.hash === '#drill') setTimeout(() => { start(null); intoSplatter(); startDrill(); }, 700);
if (location.hash === '#match') setTimeout(() => { start(null); intoSplatter(); startMatch(); }, 700);
if (location.hash === '#cup') setTimeout(() => { start(null); intoSplatter(); startMatch(true); }, 700);
if (location.hash === '#bench') setTimeout(() => { start(null); intoSplatter(); startBench(); }, 700);
// #net opens the lobby, #net-ABCD opens it with a friend's code already in the field — that link
// IS what the SHARE button sends, so the invited phone lands one tap from the court (the tap is
// not ceremony: it is where they see, and can change, the name the other phone will call them).
if (location.hash.startsWith('#net')) setTimeout(() => vsOpen(location.hash.slice(5).toUpperCase()), 700);

requestAnimationFrame(frame);

// exposed for in-browser sanity checks and simulated playtests
window.T = { TUNE, ball, P, O, score, G, zombies, keyPressed, SPR, laserScene, laserFire, pause: v => { paused = v !== false; }, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, spawnBarrel, grantWeapon, toggleTestMode, piles, gore, parts, pellets, extras, shots, pops, explode, hurtPlayer, killPlayer, splatPoint, solveShot, inServeBox, inCourt, proj, setupPoint, forceZombies, deliverTin, selectWeapon, showModal, dismissModal, dragServe, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight, startDrill, endDrill, startMatch, endMatch,
  stats, step: dt => update(dt), render, press: keyPressed, FALL, benchFall,
  start, intoSplatter, startHorde, sendBoy, // the two run doors + the wave: the promo rig (tools/) stages every clip through them

  get phase() { return G.phase; }, set phase(v) { G.phase = v; } };