// Camera, viewport, sprites and all drawing. Owns the crowd dots (visual-only state).

import { cv, ctx } from './dom.js';
import { TUNE, COURT, PLAYER_H, BOY_H, UMP_H, UMP_X, BOUNCE_IDLE, SPRITE_H } from './config.js';
import { P, O, ball, score, crowd, G } from './state.js';
import { predictLanding, flickTarget } from './gameplay.js';
import { zombies, gore, piles, parts, pellets, extras } from './zombies.js';

// ---------------------------------------------------------------- palette ----
// tennis palette -> drained splatter palette; the transition lerps between them
const PAL = {
  tennis:   { stands: '#232e42', tierA: '#2a3750', tierB: '#26324a', board: '#0e5c2e',
              out: '#295c2d', lawn: '#4cae52', stripe: '#46a54c' },
  splatter: { stands: '#181426', tierA: '#201a33', tierB: '#1c172e', board: '#3a1212',
              out: '#20331c', lawn: '#5e7747', stripe: '#576f42' },
};
const hexLerp = (a, b, t) => {
  const c = h => [parseInt(h.slice(1, 3), 16), parseInt(h.slice(3, 5), 16), parseInt(h.slice(5, 7), 16)];
  const [ar, ag, ab] = c(a), [br, bg, bb] = c(b);
  return `rgb(${Math.round(ar + (br - ar) * t)},${Math.round(ag + (bg - ag) * t)},${Math.round(ab + (bb - ab) * t)})`;
};
// how far into the rot we are, 0 (tennis) .. 1 (splatter) — duels lerp it back home
function paletteT() {
  return G.mode === 'tennis' ? 0 : G.mode === 'splatter' ? 1 - G.duelLerp : Math.min(1, G.transT / 6);
}
function palette() {
  const t = paletteT();
  if (t === 0) return PAL.tennis;
  if (t === 1) return PAL.splatter;
  const m = {};
  for (const k in PAL.tennis) m[k] = hexLerp(PAL.tennis[k], PAL.splatter[k], t);
  return m;
}

// ---------------------------------------------------------------- camera ----
const IS_TOUCH = matchMedia('(pointer: coarse)').matches; // hoisted: a matchMedia call per frame churns GC
export const RES = 3; // physical pixels per logical pixel — 3x so phone screens downscale (crisp) instead of upscaling (soft)
export let W = 480, H = 270;

export function fitViewport() { // landscape 480x270, portrait 270x480 with a longer lens
  const portrait = innerHeight > innerWidth;
  const [w, h] = portrait ? [270, 480] : [480, 270];
  if (cv.width !== w * RES) {
    W = w; H = h;
    cv.width = w * RES; cv.height = h * RES;
    // flatter lens: camZ pushed back (config 42, was 36) with camF scaled to keep the PLAYER
    // the same size — far-court zombies render ~25% bigger and actually read as zombies
    TUNE.camF = portrait ? 580 : 406;
    TUNE.horizon = portrait ? 90 : 40;
    buildCrowd();
  }
  ctx.imageSmoothingEnabled = false; // resets on canvas resize
  const sc = Math.min(innerWidth / w, innerHeight / h);
  cv.style.width = w * sc + 'px'; cv.style.height = h * sc + 'px';
}
addEventListener('resize', fitViewport);

export function proj(x, y, z) {
  const d = TUNE.camZ - z, s = TUNE.camF / d;
  return { x: W / 2 + x * s, y: TUNE.horizon + (TUNE.camY - y) * s, s };
}

// ---------------------------------------------------------------- sprites ----
// assets/<name>.png; game falls back to code-drawn figures until sprites load.
const SPR = {};
for (const n of ['p_idle1','p_idle2','p_bounce','p_bounce2','p_toss','p_smash','p_run1','p_run2','p_swing1','p_swing2',
                 'o_idle1','o_idle2','o_bounce','o_bounce2','o_toss','o_smash','o_run1','o_run2','o_swing1','o_swing2',
                 'x_ump','x_boyrun1','x_boyrun2','x_boyrun3','x_boyrun4','x_crowd','x_ads',
                 'z_a1','z_a2','z_a3','z_a4','z_b1','z_b2','z_b3','z_b4','z_c1','z_c2',
                 'z_f1','z_f2','z_f3','z_f4','z_g1','z_g2','z_s1','z_s2','z_s3']) {
  const img = new Image();
  img.onload = () => SPR[n] = img;
  img.src = 'assets/' + n + '.png';
}

// ------------------------------------------------------------------ crowd ----
export function buildCrowd() {
  crowd.dots.length = 0;
  const rows = Math.floor((proj(0, 0, 0).y - 26) / 5.5), cols = Math.ceil(W / 8);
  for (let row = 0; row < rows; row++) for (let i = 0; i < cols; i++) crowd.dots.push({
    x: 4 + i * 8 + (row % 2) * 4 + Math.random() * 3, y: 8 + row * 5.5 + Math.random() * 2,
    c: ['#c9b18f','#8f6f4f','#d9c6a5','#5f7f9f','#9f5f5f','#7f9f5f','#e0d0b0','#b0a0c0'][(i * 7 + row) % 8]
  });
}

// -------------------------------------------------------------- primitives ----
function line(x1, z1, x2, z2, w = 1) {
  const a = proj(x1, 0, z1), b = proj(x2, 0, z2);
  ctx.strokeStyle = '#e8e8dc'; ctx.lineWidth = w;
  ctx.beginPath(); ctx.moveTo(a.x, a.y); ctx.lineTo(b.x, b.y); ctx.stroke();
}
function quadXZ(x1, z1, x2, z2, color) { // filled court-plane rect (screen trapezoid)
  const a = proj(x1, 0, z1), b = proj(x2, 0, z1), c = proj(x2, 0, z2), d = proj(x1, 0, z2);
  ctx.fillStyle = color; ctx.beginPath();
  ctx.moveTo(a.x, a.y); ctx.lineTo(b.x, b.y); ctx.lineTo(c.x, c.y); ctx.lineTo(d.x, d.y); ctx.fill();
}
function drawShadow(px, py, rx, ry, alpha = 0.28) {
  ctx.fillStyle = `rgba(0,0,0,${alpha})`;
  ctx.beginPath(); ctx.ellipse(px, py, rx, Math.max(1, ry), 0, 0, 7); ctx.fill();
}
function drawBall(x, y, z, glint = false, bomb = false, flame = false) {
  const sh = proj(x, 0, z);
  drawShadow(sh.x, sh.y, Math.max(1.5, sh.s * 0.09), sh.s * 0.04, 0.3);
  const bp = proj(x, y, z);
  const r = Math.max(1.5, bp.s * 0.09);
  if (bomb) { // black ball with a flickering orange fuse pixel on top
    ctx.fillStyle = '#111'; ctx.beginPath(); ctx.arc(bp.x, bp.y, r, 0, 7); ctx.fill();
    if (Math.floor(G.idleT * 20) % 2) { ctx.fillStyle = '#ff8010'; ctx.fillRect(bp.x - 0.5, bp.y - r - 1, Math.max(1, r * 0.5), Math.max(1, r * 0.6)); }
    return;
  }
  if (flame) { // white-hot core in an orange shell, flickering
    ctx.fillStyle = '#ff8010'; ctx.beginPath(); ctx.arc(bp.x, bp.y, r + (Math.floor(G.idleT * 24) % 2 ? 1 : 0), 0, 7); ctx.fill();
    ctx.fillStyle = '#ffe8a0'; ctx.beginPath(); ctx.arc(bp.x, bp.y, Math.max(1, r * 0.5), 0, 7); ctx.fill();
    return;
  }
  ctx.fillStyle = '#e8f03a'; ctx.beginPath(); ctx.arc(bp.x, bp.y, r, 0, 7); ctx.fill();
  if (glint) { ctx.fillStyle = '#f8f8d0'; ctx.fillRect(bp.x - r * 0.3, bp.y - r * 0.5, Math.max(1, r * 0.5), Math.max(1, r * 0.5)); }
}

// ----------------------------------------------------------------- actors ----
function drawStatic(name, x, z, hMeters, bob = 0) {
  const img = SPR[name]; if (!img) return;
  const p = proj(x, 0, z);
  const h = hMeters * p.s, w = h * img.width / img.height;
  drawShadow(p.x, p.y, w * 0.4, h * 0.04, 0.25);
  ctx.drawImage(img, p.x - w / 2, p.y - h - bob, w, h);
}
function drawBoy(b) {
  const img = SPR['x_boyrun' + (Math.floor(b.runT * 14) % 4 + 1)]; if (!img) return;
  const p = proj(b.x, 0, b.z);
  const h = BOY_H * p.s, w = h * img.width / img.height;
  drawShadow(p.x, p.y, w * 0.3, h * 0.04, 0.25);
  ctx.save(); ctx.translate(p.x, p.y - (Math.floor(b.runT * 20) % 2));
  if (b.dir < 0) ctx.scale(-1, 1);
  ctx.drawImage(img, -w / 2, -h, w, h);
  ctx.restore();
}
const ZFRAMES = { a: 4, b: 4, f: 4 }; // 4-frame walk cycles where sheets exist; the rest stay 2
function drawZombie(zb) {
  const rk = zb.variant === 'r';
  const v = rk ? 'c' : zb.variant; // the racket boss reuses the turned-CPU sprite (already holds a racket)
  let N = ZFRAMES[v] || 2;
  if (!SPR['z_' + v + N]) N = 2; // frames still loading (or sheet rejected): 2-frame fallback
  // same CYCLE frequency as before — more frames subdivide the stride, they don't speed it up
  let frame = rk && zb.pose === 'swing' ? 2 : Math.floor(zb.walkT * (zb.variant === 'f' ? 6 : 2.6) * N / 2) % N + 1;
  if (zb.variant === 's' && zb.shieldT > 0) frame = 3; // chair dropped — hit it NOW
  const h = zb.variant === 'g' ? 2.7 : rk ? 1.85 : 1.8; // the brute towers half again over the crowd
  drawStatic('z_' + v + frame, zb.x, zb.z, h, Math.floor(zb.walkT * 5.2) % 2);
  if (rk) { // HP bar floating above the mini-boss
    const p = proj(zb.x, 2.05, zb.z), w = Math.max(10, p.s * 0.5), x = p.x - w / 2;
    ctx.fillStyle = '#300'; ctx.fillRect(x, p.y, w, 3);
    ctx.fillStyle = '#e03030'; ctx.fillRect(x, p.y, w * Math.max(0, zb.hp) / TUNE.racketHp, 3);
  }
}
function drawRing(x, z, color) {
  const p = proj(x, 0, z);
  // integer-snapped so the moving ring steps whole pixels instead of shimmering
  const cx = Math.round(p.x), cy = Math.round(p.y);
  const rx = Math.max(2, Math.round(p.s * 0.3)), ry = Math.max(1, Math.round(p.s * 0.12));
  ctx.strokeStyle = color; ctx.lineWidth = 2;
  ctx.beginPath(); ctx.ellipse(cx, cy, rx, ry, 0, 0, 7); ctx.stroke();
}

// gore piles: little 3D-ish mounds that accrete where kills cluster. Each pile's blobs are
// seeded ONCE from p.seed (rebuilt only when it grows), so the pile never shimmers frame to
// frame and drawing costs one proj() call — blob screen positions offset from that base.
function mulberry32(a) {
  return () => { a |= 0; a = a + 0x6D2B79F5 | 0;
    let t = Math.imul(a ^ a >>> 15, 1 | a); t = t + Math.imul(t ^ t >>> 7, 61 | t) ^ t;
    return ((t ^ t >>> 14) >>> 0) / 4294967296; };
}
const PILE_COLS = ['#6e1414', '#8c1212', '#4e0e0e', '#7a2a18'];
function buildBlobs(pl) {
  const rnd = mulberry32((pl.seed | 0) + 1), n = Math.round(6 + pl.size * 5);
  pl.blobs = [];
  for (let k = 0; k < n; k++) {
    const ang = rnd() * 6.2832, rad = Math.sqrt(rnd()); // uniform over the disk
    pl.blobs.push({ nx: Math.cos(ang) * rad, nz: Math.sin(ang) * rad,
      lift: rnd(), pr: 1 + rnd() * 2, color: rnd() < 0.1 ? '#cfc9b0' : PILE_COLS[(rnd() * 4) | 0] });
  }
  pl.blobs.sort((a, b) => (b.nz - 1.25 * b.lift) - (a.nz - 1.25 * a.lift)); // back/low first, peak on top
  pl.builtSize = pl.size;
}
function drawGorePile(pl) {
  if (!pl.blobs || pl.size > pl.builtSize) { buildBlobs(pl); pl.cv = null; } // rebuild only on growth, never on the mop-shrink
  const base = proj(pl.x, 0, pl.z), s = base.s, sz = pl.size;
  const key = Math.round(s * 4); // proj scale is constant per pile until growth or an orientation change
  if (!pl.cv || pl.cvKey !== key) { // pre-render: 1 drawImage per frame instead of ~26 ellipses (battery)
    const pad = Math.ceil(sz * 0.28 * s + 4);
    const off = document.createElement('canvas');
    off.width = off.height = pad * 2;
    const oc = off.getContext('2d');
    for (const b of pl.blobs) {
      const sx = pad + b.nx * sz * 0.28 * s;
      const sy = pad + b.nz * sz * 0.28 * s * 0.4 - b.lift * sz * 0.14 * s; // depth squished onto ground; lift raises it
      const r = Math.max(1.2, b.pr * s * 0.035);
      oc.fillStyle = b.color;
      oc.beginPath(); oc.ellipse(sx, sy, r, Math.max(1, r * 0.72), 0, 0, 7); oc.fill();
    }
    pl.cv = off; pl.cvKey = key; pl.cvPad = pad;
  }
  ctx.drawImage(pl.cv, base.x - pl.cvPad, base.y - pl.cvPad);
}
function drawPiles(near) { // split at the net like zombies so height occludes correctly
  for (const pl of piles.filter(p => near ? p.z > COURT.netZ : p.z <= COURT.netZ).sort((a, b) => a.z - b.z))
    drawGorePile(pl);
}

function drawChar(ch) {
  const receiverWaiting = G.phase === 'pretoss' && ch.side !== score.server && ch.pose === 'idle';
  const sway = receiverWaiting ? Math.sin(G.idleT * 3.2) : 0;
  const p = proj(ch.x + sway * 0.12, 0, ch.z);
  const hpx = PLAYER_H * p.s;
  // pick sprite
  const pre = ch.side === 'P' ? 'p_' : 'o_';
  let name = pre + (Math.floor(G.idleT * 1.6) % 2 ? 'idle1' : 'idle2'); // idle weight shift
  if (G.phase === 'pretoss' && ch.side === score.server && ch.pose === 'idle') {
    const w = G.idleT * BOUNCE_IDLE.tempo; // same phase as the bouncing ball
    const rising = Math.sin(w) * Math.cos(w) > 0;
    name = pre + (rising ? 'bounce2' : 'bounce'); // hand up while the ball rises, pat down exactly at the apex
  }
  if (ch.pose === 'run') name = pre + (Math.floor(ch.runT * 9) % 2 ? 'run1' : 'run2');
  if (receiverWaiting) name = pre + (sway > 0 ? 'run1' : 'run2'); // split-step shuffle
  if (ch.pose === 'swing') name = pre + (ch.poseT < 0.15 ? 'swing1' : 'swing2');
  if (ch.pose === 'serve') name = pre + (G.phase === 'toss' ? 'toss' : 'smash');
  if (ch.pose === 'run') p.y -= Math.floor(ch.runT * 18) % 2; // 1px run bob
  const img = SPR[name];
  drawShadow(p.x, p.y, hpx * 0.22, hpx * 0.06);
  if (img) {
    const k = hpx / SPRITE_H; // sprites share one scale; the idle pose defines it
    const w = img.width * k, h = img.height * k;
    ctx.save();
    ctx.translate(p.x, p.y);
    if (ch.facing < 0) ctx.scale(-1, 1);
    ctx.drawImage(img, -w / 2, -h, w, h);
    ctx.restore();
  } else drawFallbackChar(ch, p, hpx);
}
function drawFallbackChar(ch, p, h) { // shown only until sprites load
  const you = ch.side === 'P';
  const u = h / 16, x = p.x, y = p.y;
  const skin = '#e8b88a', shirt = you ? '#e8e8e8' : '#d04848', shorts = you ? '#3858a8' : '#404040';
  ctx.fillStyle = skin; ctx.fillRect(x - 2 * u, y - 16 * u, 4 * u, 4 * u);
  ctx.fillStyle = you ? '#804820' : '#282828'; ctx.fillRect(x - 2 * u, y - 16 * u, 4 * u, 1.2 * u);
  ctx.fillStyle = shirt; ctx.fillRect(x - 2.6 * u, y - 12 * u, 5.2 * u, 6 * u);
  ctx.fillStyle = shorts; ctx.fillRect(x - 2.4 * u, y - 6 * u, 4.8 * u, 3 * u);
  ctx.fillStyle = skin; ctx.fillRect(x - 1.8 * u, y - 3 * u, 1.4 * u, 3 * u); ctx.fillRect(x + 0.4 * u, y - 3 * u, 1.4 * u, 3 * u);
}
function drawMgRacket() { // horde: the player braces the racket forward and up-court, machine-gun style
  const hip = proj(P.x + 0.15, 1.05, P.z);
  const tip = proj(P.x, 0.95, P.z - 1.35); // pointing up-court, where the pellets stream out
  ctx.strokeStyle = '#d8d8d8'; ctx.lineWidth = 2;
  ctx.beginPath(); ctx.moveTo(hip.x, hip.y); ctx.lineTo(tip.x, tip.y); ctx.stroke();
  ctx.strokeStyle = '#b07030'; ctx.lineWidth = 1.5; // the head, aimed forward
  ctx.beginPath(); ctx.ellipse(tip.x, tip.y, Math.max(2, tip.s * 0.14), Math.max(3, tip.s * 0.22), 0, 0, 7); ctx.stroke();
  const cool = G.horde ? G.horde.mgT : G.mgCool; // horde or GUN-tin pickup — same racket
  if (cool > 1 / TUNE.mgRate - 0.06) { // muzzle flash right after a shot
    ctx.fillStyle = '#fff0a0'; ctx.beginPath(); ctx.arc(tip.x, tip.y, Math.max(2, tip.s * 0.12), 0, 7); ctx.fill();
  }
}

// ------------------------------------------------------------------ frame ----
export function render() {
  ctx.setTransform(RES, 0, 0, RES, 0, 0); // logical W x H coordinates at RES density
  if (G.shake) { // bomb kick: jitter the whole world (transform is reset before the HUD)
    const m = G.shake.mag * G.shake.t / 0.35;
    ctx.translate((Math.random() * 2 - 1) * m, (Math.random() * 2 - 1) * m);
  }

  const pal = palette(), pt = paletteT();
  // stands: the generated crowd, drawn in columns so it can BOUNCE when it cheers
  const standsBottom = proj(0, 0, 0).y - 12;
  const adH = 14, crowdH = standsBottom - adH + 2;
  const crowdImg = SPR['x_crowd'];
  if (crowdImg) {
    const cols = 16, sw = crowdImg.width / cols, dw = W / cols;
    for (let c = 0; c < cols; c++) {
      const dy = crowd.cheer > 0 ? -Math.random() * 2 : 0;
      ctx.drawImage(crowdImg, c * sw, 0, sw, crowdImg.height, c * dw, dy, dw + 0.5, crowdH + 2);
    }
  } else { // fallback until the image loads: the old tier stripes + dots
    ctx.fillStyle = pal.stands; ctx.fillRect(0, 0, W, standsBottom);
    for (let r = 0; r < 16; r++) { ctx.fillStyle = r % 2 ? pal.tierA : pal.tierB; ctx.fillRect(0, 6 + r * 5.5, W, 5.5); }
    for (const d of crowd.dots) {
      const jx = crowd.cheer > 0 ? (Math.random() * 2 - 1) : 0;
      const jy = crowd.cheer > 0 ? -Math.random() * 1.5 : 0;
      ctx.fillStyle = d.c; ctx.fillRect(d.x + jx | 0, d.y + jy | 0, 2, 2);
    }
  }
  // courtside advertising: tiled sponsor panels at native aspect (never half-cut text)
  const ads = SPR['x_ads'];
  if (ads) {
    const tw = ads.width * (adH / ads.height);
    for (let x = 0; x < W; x += tw) ctx.drawImage(ads, x, standsBottom - adH, tw, adH);
  } else { ctx.fillStyle = pal.board; ctx.fillRect(0, standsBottom - adH, W, adH); }
  // the rot dims the stadium: one tint over crowd + boards, fading home during duels
  if (pt > 0) { ctx.fillStyle = `rgba(12,8,20,${0.5 * pt})`; ctx.fillRect(0, 0, W, standsBottom); }

  // ground + court (Super Tennis lawn); everything outside the doubles court is OUT
  const dw = COURT.dblW / 2;
  quadXZ(-14, -6, 14, 30, pal.out);                                // out area
  quadXZ(-dw - 0.15, -0.15, dw + 0.15, COURT.L + 0.15, '#e8e8dc'); // perimeter border line
  quadXZ(-dw, 0, dw, COURT.L, pal.lawn);                           // lawn (doubles court)
  for (let z = 0; z < COURT.L; z += 2.97) quadXZ(-dw, z, dw, Math.min(z + 1.49, COURT.L), pal.stripe); // mow stripes
  // lines: baselines, doubles + singles sidelines, service box
  line(-dw, 0, dw, 0, 2); line(-dw, COURT.L, dw, COURT.L, 2);
  line(-dw, 0, -dw, COURT.L, 1.5); line(dw, 0, dw, COURT.L, 1.5);
  line(-COURT.W / 2, 0, -COURT.W / 2, COURT.L, 1.5); line(COURT.W / 2, 0, COURT.W / 2, COURT.L, 1.5);
  line(-COURT.W / 2, COURT.svcFar, COURT.W / 2, COURT.svcFar, 1);
  line(-COURT.W / 2, COURT.svcNear, COURT.W / 2, COURT.svcNear, 1);
  line(0, COURT.svcFar, 0, COURT.svcNear, 1);
  line(0, 0, 0, 0.35, 1); line(0, COURT.L - 0.35, 0, COURT.L, 1); // center marks

  // gore decals: what remains of the visiting team (flat ground layer, then far-side mounds)
  for (const d of gore) {
    const p = proj(d.x, 0, d.z);
    ctx.fillStyle = d.scorch ? `rgba(28,22,16,${d.a})` : `rgba(140,18,18,${d.a})`; // craters burn black-brown
    ctx.beginPath(); ctx.ellipse(p.x, p.y, p.s * d.r * 0.4, p.s * d.r * 0.16, 0, 0, 7); ctx.fill();
  }
  drawPiles(false); // far-side piles (occluded by the net); near-side piles drawn after the net

  // landing rings: white = incoming ball, yellow/red = your shot (red lands out)
  if (G.phase === 'rally' && ball.active && ball.bounces === 0 && ball.lastHit === 'O') {
    const l = predictLanding();
    if (l) drawRing(l.x, l.z, 'rgba(255,255,255,0.85)');
  }
  if (G.outMarker) drawRing(G.outMarker.x, G.outMarker.z, G.outMarker.out ? '#ff5050' : '#f8e048');
  // two-stage serve aim: the reticle tracks the thumb; red = the magnet has a zombie locked
  if (G.aim && G.mode === 'splatter' && G.phase === 'pretoss') {
    const ft = flickTarget(P, G.aim);
    if (ft.zt) { // locked: the ring rides the zombie itself, plus a marker over its head
      drawRing(ft.zt.x, ft.zt.z, '#ff5050');
      const hp = proj(ft.zt.x, 2.2, ft.zt.z);
      ctx.fillStyle = '#ff5050'; ctx.fillRect(hp.x - 1, hp.y - 4, 3, 3);
    } else if (ft.tx !== undefined) drawRing(ft.tx, ft.tz, '#f8e048');
  }

  // far-side drawables in z order (far → near), then the net, then the near side
  const farSide = [
    { z: COURT.netZ - 0.01, f: () => drawStatic('x_ump', UMP_X, COURT.netZ, UMP_H) },
  ];
  if (!G.hideO) farSide.push({ z: O.z, f: () => drawChar(O) });
  if (G.boy && G.boy.z <= COURT.netZ) farSide.push({ z: G.boy.z, f: () => drawBoy(G.boy) });
  for (const zb of zombies) if (zb.z <= COURT.netZ) farSide.push({ z: zb.z, f: () => drawZombie(zb) });
  farSide.sort((a, b) => a.z - b.z).forEach(d => d.f());

  // net
  const nl = proj(-COURT.netW / 2, 0, COURT.netZ), nr = proj(COURT.netW / 2, 0, COURT.netZ);
  const nlt = proj(-COURT.netW / 2, COURT.netH, COURT.netZ), nrt = proj(COURT.netW / 2, COURT.netH, COURT.netZ);
  ctx.fillStyle = 'rgba(20,26,34,0.72)';
  ctx.beginPath(); ctx.moveTo(nl.x, nl.y); ctx.lineTo(nr.x, nr.y); ctx.lineTo(nrt.x, nrt.y); ctx.lineTo(nlt.x, nlt.y); ctx.fill();
  ctx.strokeStyle = '#eeeeee'; ctx.lineWidth = 1.5;
  ctx.beginPath(); ctx.moveTo(nlt.x, nlt.y); ctx.lineTo(nrt.x, nrt.y); ctx.stroke();
  ctx.fillStyle = '#333'; ctx.fillRect(nl.x - 1, nlt.y, 2, nl.y - nlt.y); ctx.fillRect(nr.x - 1, nrt.y, 2, nr.y - nrt.y);
  drawPiles(true); // near-side piles: after the net (they're closer), before the near actors
  if (G.boy && G.boy.z > COURT.netZ) drawBoy(G.boy);
  zombies.filter(zb => zb.z > COURT.netZ).sort((a, b) => a.z - b.z).forEach(drawZombie);

  // server idly bouncing the ball while waiting
  if (G.phase === 'pretoss') {
    const sv = score.server === 'P' ? P : O;
    const bx = sv.x - BOUNCE_IDLE.dx * (sv.side === 'P' ? 1 : -1);
    const by = Math.abs(Math.sin(G.idleT * BOUNCE_IDLE.tempo)) * BOUNCE_IDLE.apex;
    drawBall(bx, by, sv.z);
  }
  // the match ball (and any triple-serve side balls in flight)
  if ((ball.active || G.phase === 'over') && !ball.collected) drawBall(ball.x, ball.y, ball.z, true, ball.bomb, ball.flame);
  for (const e of extras) drawBall(e.x, e.y, e.z);
  // splatter particles (fire embers ride the same array)
  for (const pt of parts) {
    const pp = proj(pt.x, pt.y, pt.z);
    ctx.fillStyle = pt.fire ? (pt.t > 0.12 ? '#ffc030' : '#ff8010')
      : pt.dark ? 'rgba(96,14,14,0.9)' : 'rgba(170,22,22,0.9)';
    ctx.fillRect(pp.x | 0, pp.y | 0, 2, 2);
  }
  // machine-gun pellets: flat tracers with a tiny ground shadow
  for (const pe of pellets) {
    const sh = proj(pe.x, 0, pe.z); drawShadow(sh.x, sh.y, Math.max(1, sh.s * 0.04), Math.max(1, sh.s * 0.02), 0.25);
    const pp = proj(pe.x, pe.y, pe.z);
    ctx.fillStyle = '#f8e048'; ctx.fillRect((pp.x | 0) - 1, (pp.y | 0) - 1, 2, 2);
  }
  if (G.mode !== 'eaten') drawChar(P); // there is no P anymore
  if ((G.horde || G.mgT > 0) && G.mode === 'splatter') drawMgRacket(); // rambo racket over the player

  ctx.setTransform(RES, 0, 0, RES, 0, 0); // un-shake: the HUD and overlays stay rock steady
  if (G.boomFlash > 0) { ctx.fillStyle = `rgba(255,255,255,${Math.min(1, G.boomFlash / 0.08) * 0.85})`; ctx.fillRect(0, 0, W, H); }

  // HUD — Wimbledon-style scoreboard: bottle-green board with a purple flash down the left,
  // cream serif names, a yellow ball on the server, sets/games in divided columns and the
  // current game in a purple points cell. Splatter adds a darker status strip below.
  const splat = G.mode !== 'tennis';
  const sbX = 6, sbY = 6, sbW = 150, sbH = splat ? 40 : 28, rowsB = splat ? 29 : sbH - 3;
  const board = () => { ctx.beginPath(); ctx.roundRect ? ctx.roundRect(sbX, sbY, sbW, sbH, 3) : ctx.rect(sbX, sbY, sbW, sbH); };
  board(); ctx.fillStyle = '#0b3b2a'; ctx.fill();                                   // Wimbledon green
  ctx.save(); board(); ctx.clip();
  ctx.fillStyle = '#4b2e83'; ctx.fillRect(sbX, sbY, 5, sbH);                        // the purple flash
  ctx.fillStyle = 'rgba(255,255,255,0.05)'; ctx.fillRect(sbX, sbY, sbW, 1);         // top sheen
  if (splat) { ctx.fillStyle = 'rgba(0,0,0,0.28)'; ctx.fillRect(sbX, 29, sbW, sbH - 23); } // status strip well
  ctx.restore();
  ctx.strokeStyle = 'rgba(244,239,225,0.1)'; ctx.lineWidth = 1;                     // column dividers
  for (const cx of (splat ? [64, 82, 100] : [82, 100])) { ctx.beginPath(); ctx.moveTo(cx, sbY + 3); ctx.lineTo(cx, rowsB); ctx.stroke(); }
  board(); ctx.strokeStyle = 'rgba(244,239,225,0.22)'; ctx.stroke();               // board edge
  const ptTxt = i => score.pts[0] >= 3 && score.pts[1] >= 3
    ? (score.pts[i] === score.pts[1 - i] ? '40' : score.pts[i] > score.pts[1 - i] ? 'AD' : '40')
    : ['0', '15', '30', '40'][Math.min(score.pts[i], 3)];
  ctx.textBaseline = 'middle';
  const names = splat ? ['YOU', 'THEM'] : ['YOU', 'CPU'];
  for (let i = 0; i < 2; i++) {
    const rowY = 13 + i * 11, serving = (score.server === 'P') === (i === 0);
    ctx.fillStyle = serving ? '#4b2e83' : 'rgba(244,239,225,0.05)'; ctx.fillRect(101, rowY - 5, 51, 10); // points cell (purple for the server)
    if (serving) { ctx.fillStyle = '#e8f03a'; ctx.beginPath(); ctx.arc(15, rowY, 2.4, 0, 7); ctx.fill(); ctx.strokeStyle = '#0b3b2a'; ctx.lineWidth = 0.6; ctx.stroke(); } // the ball marks the server
    ctx.textAlign = 'left'; ctx.font = 'bold 9px Georgia, "Times New Roman", serif';
    ctx.fillStyle = serving ? '#f6f1e3' : '#9db3a7'; ctx.fillText(names[i], 21, rowY + 0.5);
    ctx.textAlign = 'center';
    if (splat) { ctx.fillStyle = '#8fa79a'; ctx.font = 'bold 8px Georgia, serif'; ctx.fillText(String(G.sets[i]), 73, rowY + 0.5); } // sets
    ctx.fillStyle = '#dfe7df'; ctx.font = 'bold 9px Georgia, serif'; ctx.fillText(String(score.games[i]), 91, rowY + 0.5);           // games
    ctx.fillStyle = serving ? '#f6f1e3' : '#b9cabf'; ctx.font = 'bold 9px Georgia, serif'; ctx.fillText(ptTxt(i), 126, rowY + 0.5);  // current game
  }
  if (splat) { // status strip: kills-to-next-point pips + weapon stock
    const sy = 35;
    ctx.textAlign = 'left';
    if (TUNE.killPips && TUNE.killsPerPoint > 1) { // "how many zombies to the next point" — empty pips are kills to go
      ctx.fillStyle = '#7f9488'; ctx.font = 'bold 6px Georgia, serif'; ctx.fillText('NEXT', 12, sy + 0.5);
      for (let k = 0; k < TUNE.killsPerPoint; k++) {
        ctx.beginPath(); ctx.arc(36 + k * 7, sy, 2.2, 0, 7);
        if (k < G.killCount) { ctx.fillStyle = '#e8f03a'; ctx.fill(); }
        else { ctx.strokeStyle = '#54756a'; ctx.lineWidth = 1; ctx.stroke(); }
      }
    }
    const wx = 80; // weapon stock
    for (let b = 0; b < G.bombs; b++) { ctx.fillStyle = '#111'; ctx.beginPath(); ctx.arc(wx + b * 8, sy, 2.6, 0, 7); ctx.fill(); ctx.strokeStyle = '#ff8010'; ctx.lineWidth = 0.75; ctx.stroke(); }
    for (let b = 0; b < G.triples; b++) { ctx.fillStyle = '#e8f03a'; ctx.beginPath(); ctx.arc(wx + b * 8, sy, 2.6, 0, 7); ctx.fill(); ctx.fillRect(wx + b * 8 - 4, sy - 1, 1.5, 1.5); ctx.fillRect(wx + b * 8 + 3, sy - 1, 1.5, 1.5); }
    for (let b = 0; b < G.flames; b++) { ctx.fillStyle = '#ff8010'; ctx.beginPath(); ctx.arc(wx + b * 8, sy, 2.6, 0, 7); ctx.fill(); ctx.fillStyle = '#ffe8a0'; ctx.fillRect(wx + b * 8 - 1, sy - 1, 2, 2); }
    if (G.mgT > 0) { ctx.fillStyle = '#0a2a1e'; ctx.fillRect(wx, sy - 2.5, 40, 5); ctx.fillStyle = '#e8f03a'; ctx.fillRect(wx, sy - 2.5, 40 * Math.min(1, G.mgT / TUNE.mgPickupLen), 5); }
  }
  ctx.textBaseline = 'top'; ctx.textAlign = 'center';
  if (G.mode === 'eaten') { // the run summary — permadeath makes this scoreboard the whole game
    ctx.fillStyle = 'rgba(10,4,6,0.72)'; ctx.fillRect(0, 0, W, H);
    ctx.fillStyle = '#c02020'; ctx.font = 'bold 16px monospace';
    ctx.fillText('GAME, SET, MASSACRE.', W / 2, H / 2 - 40);
    ctx.fillStyle = '#c8d0dc'; ctx.font = 'bold 10px monospace';
    ctx.fillText('SURVIVED ' + G.runGames + ' GAMES · ' + G.sets[0] + ' SETS', W / 2, H / 2 - 14);
    if (G.newBest) { // a fresh record crows; otherwise show the mark to beat
      const pulse = 0.55 + 0.45 * Math.abs(Math.sin(G.eatenT * 4));
      ctx.fillStyle = `rgba(248,224,72,${pulse})`; ctx.font = 'bold 11px monospace';
      ctx.fillText('★ NEW BEST ★', W / 2, H / 2 + 4);
    } else if (G.best && G.best.games > 0) {
      ctx.fillStyle = '#8fa0b8'; ctx.font = 'bold 8px monospace';
      ctx.fillText('BEST  ' + G.best.games + ' GAMES · ' + G.best.sets + ' SETS', W / 2, H / 2 + 4);
    }
    if (G.eatenT > 0.7) { ctx.fillStyle = '#f8e048'; ctx.font = 'bold 8px monospace'; ctx.fillText('TAP TO PLAY AGAIN', W / 2, H / 2 + 26); }
  }
  if (G.phase === 'pretoss' && score.server === 'P' && G.mode !== 'eaten' && !G.horde && !(G.mgT > 0)) {
    ctx.fillStyle = '#f8e048'; ctx.font = 'bold 8px monospace';
    const touch = IS_TOUCH;
    const stock = G.bombs ? 'BOMB' : G.triples ? 'TRIPLE' : G.flames ? 'FIRE' : null;
    const txt = G.mode === 'splatter'
      ? (G.aim ? (stock ? `RELEASE FIRES THE ${stock} · DRAG BACK TO CANCEL` : 'RELEASE TO SERVE · DRAG BACK TO CANCEL')
        : stock ? `AIMED SERVES FIRE THE ${stock} · TAP KEEPS IT`
               : touch ? 'TAP TO SERVE · HOLD + DRAG TO AIM' : 'SPACE SERVES · ARROWS AIM')
      : G.serveNum === 2 ? (touch ? 'SECOND SERVE — TAP' : 'SECOND SERVE — SPACE')
        : (touch ? 'TAP TO TOSS, TAP TO SERVE' : 'SPACE TO TOSS, SPACE TO SERVE');
    ctx.fillText(txt, W / 2, H - 16);
  }
  if (G.flash) {
    ctx.font = 'bold 14px monospace'; ctx.fillStyle = '#ffffff';
    ctx.fillText(G.flash.text, W / 2, 60 + Math.sin(G.flash.t * 20) * 1);
  }
  if (G.interlude && G.interlude.introT > 0) { // the duel card: a real pause, front and center
    ctx.fillStyle = 'rgba(10,6,8,0.66)'; ctx.fillRect(0, H / 2 - 36, W, 64);
    ctx.fillStyle = '#ff5050'; ctx.font = 'bold 18px monospace';
    ctx.fillText('SUDDEN DEATH', W / 2, H / 2 - 26);
    ctx.fillStyle = '#e8e8dc'; ctx.font = 'bold 8px monospace';
    ctx.fillText('ONE POINT · THE LINES ARE LIVE', W / 2, H / 2 - 2);
    ctx.fillText('WIN IT FOR THE NEXT TIN', W / 2, H / 2 + 12);
  }
  if (TUNE.missHud && G.lastMiss && G.idleT - G.lastMiss.at < 3.5) { // last miss reason, live
    ctx.font = 'bold 8px monospace'; ctx.fillStyle = '#ff9060';
    ctx.fillText(G.lastMiss.text.toUpperCase(), W / 2, H - 28);
  }
  if (G.logShow) { // scoreboard tap: recent swing diagnostics, screenshot-friendly
    const list = G.missLog.slice(-9), lh = 10, top = 40;
    ctx.fillStyle = 'rgba(8,10,16,0.88)'; ctx.fillRect(6, top, W - 12, list.length * lh + 16);
    ctx.font = 'bold 7px monospace'; ctx.textAlign = 'left';
    ctx.fillStyle = '#8fa0b8'; ctx.fillText('SWING LOG — tap scoreboard to hide', 10, top + 5);
    const maxCh = Math.floor((W - 20) / 4.3);
    list.forEach((e, i) => {
      ctx.fillStyle = e.result === 'HIT' ? '#7fd07f' : '#ff9060';
      ctx.fillText((e.at + 's ' + e.result + ' ' + e.reason).slice(0, maxCh), 10, top + 16 + i * lh);
    });
  }
  ctx.textAlign = 'left';
}