splatter-tennis/main.js

// 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, COURT, COURTS, TOURS, UMP_H, UMP_X, EATEN_RESTART } from './config.js';
import { P, O, ball, score, G, setupPoint, selectCourt, selectTour } from './state.js';
import { update, restartRun, keyPressed, solveShot, inServeBox, inCourt, forceZombies, splatPoint, deliverTin, selectWeapon, grantWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight , toggleTestMode } from './gameplay.js';
import { fitViewport, render, proj, RES, SPRV } from './render.js';
import { voice, ambient, menuMusic, menuDuck } from './audio.js';
import { zombies, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer , spawnBarrel } from './zombies.js';
import { cv } from './dom.js';
import * as stats from './stats.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;
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.fps && now - last < 1000 / TUNE.fps - 2) return; // frame cap (battery): skip RAF ticks until it's our beat
  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();
}

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);

// The overlay is a four-stage machine: splash -> {setup, stats, ranks}. The title screen IS the
// menu — a separate menu stage behind it showed the same logo on the same backdrop and read as the
// title screen failing to advance. One overlay throughout, swapped by data-stage, so the court never
// flashes between screens; HIDDEN during play rather than removed, so a restart puts it back.
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;
const go = stage => { intro.dataset.stage = stage; menuMusic(); }; // every stage change is a gesture, so it is also a safe place to (re)start the theme

// --- tour tiles, built from the table. Same "tap selects, SERVE UP starts" rule as the court rows —
// the setup screen picks WHO and WHERE, and nothing on it commits you.
const tourList = document.getElementById('tours');
for (const t of TOURS) {
  const b = document.createElement('button');
  b.className = t.id === pickedTour ? 'on' : '';
  b.innerHTML = `<img src="assets/${t.tile}.png?v=${SPRV}" alt=""><b>${t.name}</b>`;
  b.addEventListener('click', () => {
    pickedTour = t.id;
    for (const el of tourList.children) el.classList.toggle('on', el === b);
    summary();
  });
  tourList.appendChild(b);
}

// --- 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.
const meter = (label, v, cls = '') =>
  `<div class="meter ${cls}"><u>${label}</u><s><i style="width:${
    Math.round(Math.min(1, Math.max(0.08, v)) * 100)}%"></i></s></div>`;
const courtList = document.getElementById('courtList');
for (const c of COURTS) {
  const b = document.createElement('button');
  b.className = 'court' + (c.id === picked ? ' on' : ''); // your last court comes up pre-picked
  b.innerHTML = `<img src="assets/${c.tile}.png?v=${SPRV}" alt=""><span class="cb">`
    + `<b>${c.name}</b><i>${c.sub}</i>`
    + 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', () => {
    picked = c.id;
    for (const el of courtList.children) el.classList.toggle('on', el === b);
    summary();
  });
  courtList.appendChild(b);
}

// what the setup footer says you are about to play, and what it is worth beating
function summary() {
  const t = TOURS.find(x => x.id === pickedTour) || TOURS[0];
  const c = COURTS.find(x => x.id === picked) || COURTS[0];
  const best = stats.total().best;
  document.getElementById('sSum').innerHTML =
    `<span>${t.name.replace(' SINGLES', '')} · ${c.name}</span>`
    + `<span>${best ? best + (best === 1 ? ' GAME' : ' GAMES') + ' TO BEAT' : 'FIRST RUN'}</span>`;
}

// The splash carries ONE number, on the STATS button. A boxed BEST RUN / WORLD RANK bar across the
// top came out of the mockup and went again: it sat on the best part of the art and said twice what
// the two buttons underneath already say. Re-read whenever the splash comes back up, because a run
// has just ended and the count has moved.
function refreshSplash() {
  document.getElementById('mKills').textContent = stats.total().kills.toLocaleString('en-GB') + ' KILLS';
  summary();
}

function start() {
  if (!menuUp()) return;
  selectTour(pickedTour);
  selectCourt(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
}
let stPeriod = 'all';
const openStats = () => { stats.drawStats(stPeriod, SPRV); go('stats'); };
document.getElementById('mStart').addEventListener('click', () => go('setup'));
document.getElementById('mStats').addEventListener('click', openStats);
document.getElementById('mRanks').addEventListener('click', () => { stats.drawRanks(); go('ranks'); });
document.getElementById('cStart').addEventListener('click', start);
for (const id of ['sBack', 'stBack', 'rkBack'])
  document.getElementById(id).addEventListener('click', () => go('splash'));
// the three period tabs are one listener on the strip — the button carries the period in data-p
document.getElementById('stTabs').addEventListener('click', e => {
  const b = e.target.closest('button'); if (!b) return;
  stPeriod = b.dataset.p;
  for (const el of e.currentTarget.children) el.classList.toggle('on', el === b);
  stats.drawStats(stPeriod, SPRV);
});
refreshSplash();

// 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', () => menuMusic());
// 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('main.js', { method: 'HEAD' })
  .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 (e.key === 'Escape') return go('splash');
  if (stage === 'splash') {
    if (e.key === 'Enter' || e.key === ' ') go('setup');
    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();
  else if (e.key === 'Enter' || e.key === ' ') start();
});

// 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', () => {
  if (G.mode === 'splatter') 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 = () => {
  if (G.modal || G.mode !== 'eaten' || G.eatenT <= EATEN_RESTART) return;
  restartRun();
  refreshSplash();          // the run just ended: both splash figures have moved
  intro.hidden = false; go('splash');
};
cv.addEventListener('pointerdown', maybeRestart);
addEventListener('keydown', maybeRestart);

// hidden shortcuts: three taps on the UMPIRE summons zombie mode early, three on the SCOREBOARD
// opens test mode (a medium wave plus every barrel weapon — see gameplay.toggleTestMode)
let umpTaps = [], boardTaps = [];
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) { // the scoreboard
    const now = performance.now();
    boardTaps = boardTaps.filter(t => now - t < 1600);
    boardTaps.push(now);
    if (boardTaps.length >= 3) {
      boardTaps = [];
      // taps one and two already toggled the miss-log twice, so it is back where it started —
      // this third one must NOT toggle it again, or every trip through test mode leaves the
      // overlay on behind you
      toggleTestMode();
    } else G.logShow = !G.logShow;                // a single tap is still the miss-log overlay
    return;
  }
  const u = proj(UMP_X, 0, COURT.netZ);
  if (Math.abs(x - u.x) > 16 || y > u.y + 6 || y < u.y - UMP_H * u.s - 8) return;
  const now = performance.now();
  umpTaps = umpTaps.filter(t => now - t < 1600);
  umpTaps.push(now);
  if (umpTaps.length >= 3) { umpTaps = []; forceZombies(); }
});



// ---- 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.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);

requestAnimationFrame(frame);

// exposed for in-browser sanity checks and simulated playtests
window.T = { TUNE, ball, P, O, score, G, zombies, laserScene, laserFire, pause: v => { paused = v !== false; }, spawnZombie, spawnRacketZombie, spawnMachine, spawnChapterBoss, spawnBarrel, grantWeapon, toggleTestMode, piles, gore, parts, pellets, extras, shots, explode, hurtPlayer, killPlayer, splatPoint, solveShot, inServeBox, inCourt, proj, setupPoint, forceZombies, deliverTin, selectWeapon, showModal, dismissModal, startDuel, resolveInterlude, flickTarget, startBossFight, endBossFight,
  stats, step: dt => update(dt), render, press: keyPressed,
  get phase() { return G.phase; }, set phase(v) { G.phase = v; } };