// All tuning and constants. TUNE is live-editable in game via the T panel;
// the exported consts below are structural values that code shares but the panel doesn't show.

export const TUNE = {
  camZ: 42, camY: 9, camF: 406, horizon: 40, // camF/horizon are per-orientation, set in fitViewport
  gravity: 9.2,            // slightly floaty vs 9.8 for readability
  spinFactor: 0.9,         // extra dive on quality shots (fake topspin)
  bounceY: 0.58, bounceXZ: 0.78,
  playerSpeed: 5.4, aiSpeed: 4.3,
  reach: 1.3, aiReach: 1.6, // tight contact radius: the assist positions you, the tap must be honest
  swingWindup: 0.06,       // s before contact window opens
  swingWindow: 0.16,       // s contact window length
  baseShotSpeed: 16, qualityShotSpeed: 12,  // horizontal m/s = base + q*quality; perfect timing = real pace
  // the slingshot's pace range. Weighted hard toward QUALITY so a full draw is a smash you can
  // see: 21 m/s floppy at the minimum pull, 41 m/s at full. (baseShotSpeed above is the rally
  // volley and stays put — it's shared with tennis mode and the CPU.)
  serveSpeed: 19, serveQualitySpeed: 22,
  serveSpin: 1.3,   // extra gravity a full-power serve carries (was a fixed 0.35). Without it the
                    // net-clearance loop ate the whole smash: a flat fast ball can't get over the
                    // tape AND come down on a target, so it got throttled back to walking pace.
                    // Heavy topspin lets it leave flat and DIVE, which is what a smash actually is.
  aimError: 2.4,           // m of scatter at quality 0
  perfectMs: 45,           // |offset from window center| for PERFECT
  aiQualityMin: 0.45, aiQualityMax: 0.85, aiFlub: 0.09,
  aiReaction: 0.45,        // s before the CPU reads your shot — well-aimed corners are winners
  autoAssist: matchMedia('(pointer: coarse)').matches ? 1.15 : 0, // auto-run speed factor (mobile)
  zSpeed: 0.7,      // zombie shamble speed m/s
  // ---- THE DIFFICULTY DIRECTOR. Every dial below used to bottom out by about game 12, which is why
  // a 50-game run stopped changing (games 12..50 were arithmetically identical). They are all keyed
  // on G.runGames now and all keep moving; the ceilings that remain exist for perf or fairness, not
  // because the curve ran out. See HANDOFF "The difficulty director".
  // Calibrated to TRACK the old curve through roughly game 12 and then keep going, rather than to
  // replace it: the first pass at this made games 1-30 easier, which is the opposite of the ask.
  zSpawnEvery: 3.0,  // s between spawns in game 1
  zSpawnAccel: 0.16, // hyperbolic tightening: gap = zSpawnEvery / (1 + games * this). g5 1.67s,
                     // g11 1.09s (old floored at 1.0 here and stopped dead), g20 0.71s, g30 0.52s
  zSpawnMin: 0.35,   // hard spawn-gap floor, safety only — reached around game 41
  zMax: 3,           // shamblers on court in game 1
  zMaxPerGame: 0.9,  // cap growth per finished game (was a flat +1 into a wall at game 11)
  zMaxCap: 24,       // absolute shambler cap — readability ceiling, reached ~game 24
  zSpeedPerGame: 0.13, // shamble-speed ramp per finished game. Was TIME-based (splatT/70) and hit its
                       // ceiling after 105 seconds of splatter, i.e. during game 2 — so shamble speed
                       // was never a progression lever at all. g12 matches the old top speed (1.75
                       // m/s), and it climbs to 2.7 m/s by game 22.
  zSpeedMax: 2.9,      // cap on that ramp (top speed = zSpeed * 3.9). runnerVMax still caps runners.
  nastyPerGame: 0.03,  // share of spawns drawn from the advanced roster, per finished game
  nastyMax: 0.75,      // ...capped here (g14 matches the old 0.42, g25 hits the cap). The old mix was
                       // frozen at exactly 0.42 from game 12 to the end of the run.
  hordeGrow: 0.2,      // horde length AND spawn rate both scale by this per set already banked
  zHordeCap: 34,       // hard body ceiling DURING a horde. A horde ignores the director cap on
                       // purpose (that is the point of it), but hordeGrow means a late wave now tries
                       // for ~120 spawns where the old fixed 12 s x 2.5/s could only ever ask for 30,
                       // and a 40-body court on a 270px-wide portrait screen is mush, not menace.
  // ---- PLAYER HEALTH. A SECOND, SEPARATE damage channel: only ranged attacks touch it. A shambler
  // reaching you is still instant permadeath (G.mode='eaten') — that decision is settled, see HANDOFF.
  // There is no HP bar and there never will be: the state shows as blood on the man.
  playerHp: 4,      // hits from ranged attacks you can absorb before you go down
  hurtGrace: 1.1,   // s of invulnerability after a hit — a burst must not delete you in one volley
  healPerDuel: 2,   // hp back for winning a sudden-death duel. THE reason to want the duel.
  // ---- the rogue ball machine ('m'): real tennis furniture that shoots at you. It never shambles,
  // so it never crosses your baseline and never scores — it is a standing threat you choose when to
  // deal with, which is the target-priority decision the game was missing.
  machEvery: 4,     // games before the first machine can appear, and games between them after
  machMax: 2,       // machines allowed on court at once
  machHp: 3,        // splat-quality hits to wreck one
  machCycle: 3.4,   // s between its shots
  machWind: 0.9,    // s of TELEGRAPH before each shot — the fairness contract, same idea as shriek()
  machSpeed: 13,    // m/s it fires at
  machDmg: 1,       // player hp a shot costs if you don't return it
  shotHitR: 0.42,   // m — how close a hostile ball must ACTUALLY be to hit you. Measured: the old test
                    // (0.55 m with the parry's 0.8 z-weighting) fired while the ball was still 0.68 m
                    // up-court and drawn up around his head — "visually the ball is not yet at the
                    // player but somehow the player already is hit". Depth is NOT weighted here.
  shotHitY: 1.75,   // m — and it has to be at body height, so a lob passing overhead never counts
  parryPow: 0.85,   // shot quality of a RETURNED machine ball — a parry is a real weapon
  // The parry gets its OWN generous reach and window, not the normal swing's. Returning a shot is the
  // intended answer, on a phone, with one thumb, against something aimed at you — it has to be
  // forgiving. parryWindow must stay <= swingWindup + swingWindow*VOLLEY.window (0.348 s) or the
  // swing clock in update() expires before the window closes.
  // TIGHTENED after Oliver's second playtest: "I can tap pretty early and it returns the ball".
  // At parryArm 6.0 / window 0.34 / reach 2.4 the shot flew INTO reach during the window, so any tap
  // once it was vaguely close worked and the timing stopped mattering. At 13 m/s a 3.4 m arm is about
  // 0.26 s of "the tap counts", which is a real reaction test and still landable one-thumbed.
  parryArm: 3.4,    // m — an incoming shot this close makes the next tap a SWING instead of a serve
  parryReach: 1.7,  // m — how far off the racket a return still connects (normal volley reach is 1.82)
  parryWindow: 0.2, // s the return window stays open after the tap
  // ---- chapter bosses: one every bossEvery games, escalating. The racket zombie is demoted to an
  // occasional opponent (racketEvery) so the boss is the only thing that reads as a wall.
  bossEvery: 10,    // games between chapter bosses
  bossHp: 16,       // hp of the FIRST one; each later chapter adds bossHpPerChapter. 10 was far too
                    // soft — three banked flame balls took chapter 1 down (2 impact + 2.4 burn each)
  bossHpPerChapter: 9,
  bossScale: 1.5,   // body height multiplier at chapter 1 (a shambler is 1.8 m)
  bossScalePer: 0.18, // ...growing per chapter, so chapter 4 towers
  bossSpeed: 0.42,  // m/s it advances — slow, deliberate, unstoppable
  bossCycle: 2.6,   // s between its ranged attacks (it uses the machine's projectile)
  bossVolley: 3,    // shots per attack — STAGGERED IN TIME, not fanned across space. Fanning them
                    // +-1.9 m meant only the middle ball could ever reach you and the other two were
                    // decoration; Oliver called that out. Three real threats in a rhythm instead.
  bossSalvoGap: 0.42, // s between the shots of one volley
  bossWind: 0.5,    // s of telegraph before a boss throws — shorter than the machine's 0.9 on purpose:
                    // he asked for a tighter reaction time, and a boss should be harder than furniture
  bossShotSpeed: 15.5, // m/s a boss throws at (the machine's is machSpeed 13)
  racketEvery: 3,   // games between racket-zombie (plain opponent) spawns — was EVERY won game, which
                    // is why he read as "the boss" and why a real boss would not have stood out
  asideEvery: 55,   // s between the umpire's sarcastic asides in splatter (jittered +-40%). He never
                    // acknowledged that the match had changed; now he comments on it, disapprovingly.
  racketHpPerGame: 0.12, // the racket zombie stiffens as the run goes on (floored into whole hp)
  // ---- damage. Bodies with hp (racket boss 'r', brute 'g') take damage in these units, so a big
  // boss is just a bigger hp number and every weapon stays proportional. Fractions are legal: they
  // bank on zb.chip and only whole points come off hp (the wound SKINS switch on hp thresholds).
  dmgBall: 1,       // a splat-quality ball or serve
  dmgSide: 1,       // one TRIPLE side ball — used to pass straight through the boss doing nothing
  dmgPellet: 0.34,  // one machine-gun round — three chip a point off. Also used to no-op on the boss
  dmgBomb: 3,       // caught in a blast. Was an instant kill that ignored hp entirely
  dmgFlame: 2,      // a direct flame-ball touch (and it sets the boss alight, which it didn't before)
  bossBurnMul: 0.4, // burnDps multiplier while a boss body cooks — it burns, just slower than a body
  bossHitCool: 0.2, // s a boss body is immune to further BALL contact after taking a hit. A flame ball
                    // has full pierce (it is not consumed on contact, so it can cut a lane), and a boss
                    // is not removed when hit — so the same ball sat inside its radius and re-wounded it
                    // EVERY FRAME. That is why one flame ball killed a 16 hp chapter boss.
  changeoverT: 5.0, // s the changeover breather lasts (after odd games, as the rules demand)
  boyMopSpeed: 2.2, // m/s a MOPPING ball boy crosses at (a fetching one still sprints at 7.5)
  boyMopDwell: 1.8, // s he stands on a stain pushing the mop before moving to the next one
  boyMaxJobs: 4,    // stains one boy will clean in a round — a kill streak must not employ him forever
  boyStride: 0.28,  // m of travel per animation frame. Frames are driven by DISTANCE, not time, so
                    // the feet cannot slide: change a boy's speed and his legs keep up on their own.
  gameBeatT: 1.6,   // s the game-end beat lasts on even (non-changeover) games
  eatenR: 0.9,      // m a shambler must close to eat you — matches the visual sprite overlap
  zSnap: 0.9,       // m of lateral slack at zero range — the aim cone's base width (fat-thumb forgiveness)
  killsPerPoint: 3, // splatter: zombie kills to score ONE tennis point (1 = every kill scores, old behavior)
  zSplatQ: 0.5,     // min shot quality to splatter; below = stagger pushback
  zPushback: 1.4,   // m a staggered zombie is knocked back
  splatterOverT: 0.1, // s the spent-ball 'over' beat lasts before the next serve is armed
  // the slingshot: the pull's DIRECTION picks a lane, its LENGTH is power. Deliberately DECOUPLED —
  // reaching a far shambler must not cost a longer drag than the screen has room for. The old
  // mapping (pull length = reach) is why you had to drag off the bottom of the phone.
  pullMin: 18,      // px of pull below which the release cancels — no shot, nothing spent
  pullFull: 130,    // px of pull for a full-power shot. Keep this well inside one thumb's travel — but
                    // 95 was so short that EVERY pull maxed out by accident and the meter never
                    // meant anything. A full draw should cost a deliberate stretch of the thumb.
                    // Capped short of ~150 because a pull that STARTS low on the screen has to
                    // still be completable downward before the finger runs off the glass.
  pullQMin: 0.12,   // shot quality at pullMin, scaling to 1.0 (= PERFECT) at pullFull. Below
                    // zSplatQ it only staggers, so a lazy flick can't kill: THE anti-spam knob.
  aimCone: 0.10,    // lane half-width added per meter of range. This is what makes the pull's ANGLE
                    // mean something: at 0.45 the cone was ±10 m at the far baseline — the whole
                    // court — so every downward pull picked the same body and the angle felt inert.
                    // 0.10 gives ±2.9 m out there: you have to actually point at a lane.
  pullHintAfter: 1.5, // s of doing nothing in the serve stance before the pull gesture demos itself
  aimTie: 0.12,     // how much worse-aimed a NEARER body may be and still win the lane (0..1 of the
                    // cone half-width). 0 = pure best-aligned wins; 1 = the old "nearest in the
                    // lane always wins", which is what made the magnet grab the wrong shambler.
  aimReach: 22,     // m the aim ray runs when no shambler stands in the lane
  // How the camera moves while you're drawing the slingshot. NEGATIVE (the default) drops it and
  // pushes in — you crouch into the shot. POSITIVE lifts it and leans back for a steeper, more
  // top-down look, which reads the depth behind the net better but feels less like aiming.
  // Both 0 = the old fixed camera.
  aimCamY: 0,       // m of camera height change (negative drops you into the shot)
  aimCamZ: 0,       // m of camera dolly (negative = closer). Both 0 = the camera holds still,
                    // which is where Oliver landed: the aim graphics carry the read on their own.
  backstopZ: -1.8,  // z of the far backstop — must sit IN FRONT of the -2 retire line, or balls die before they reach it
  backstopKeep: 0.55, // pace a ball keeps after the rebound — still lethal, slower
  backstopPop: 1.8,   // m/s of lift off the fence, so the rebound travels back instead of dying at the net posts
  meleeCool: 1.0,   // s between racket swishes — melee is the panic button, not the default
  meleeCrowd: 0.38, // ...but the panic button PANICS. The cooldown shortens with how many bodies are
                    // actually on top of you, so a late horde stops outrunning your only close-range
                    // answer: cool = meleeCool / (1 + (near-1)*meleeCrowd), floored at meleeCoolMin.
                    // 1 body 1.00s, 4 bodies 0.47s, 8 bodies 0.28s.
  meleeCoolMin: 0.22,
  meleeCrowdR: 3.4, // m — the radius that counts as "on top of you" for that scaling (> meleeRange,
                    // so the swish speeds up as they close in, not only once they are already on you)
  zPierce: 0.75,    // pace a ball keeps after a splatter — hot balls plow through lined-up pairs
  // The schedule calls the DUEL, not the tin: weapons are only ever won, but a duel comes round
  // on its own so there is always a chance at one. Fires off the next hand-cleared wave.
  duelFirst: 2,     // game after which the first scheduled sudden-death duel is called
  duelEvery: 3,     // games between scheduled duels after the first
  bombMax: 3,       // bomb balls in a fresh tin
  tinTriples: 3,    // triple-serves in a fresh tin
  tinFlames: 3,     // flame balls in a fresh tin
  tinGuns: 1,       // machine-gun charges in a fresh tin
  wCap: 9,          // per-type cap on the courtside rack — tins accumulate, but only so many
  rackH: 30,        // px height of the bottom weapon rack (feel knob: how much court it covers).
                    // 22 logical px is ~30 CSS px on a phone — under half Apple's 44px target, which
                    // is why switching tins felt fiddly. rackHit also pads the touch band (render.js).
  bombRadius: 4.2,  // m blast radius of a bomb ball — 2.5 barely cleared the bodies stood on the crater
  hordeLen: 12,     // s a horde wave lasts
  hordeRate: 3.5,   // zombies spawned per second during a horde. Raised WITH the gun buff below: the
                    // wave is meant to leave a standing crowd on your half when it ends, not to be a
                    // twelve-second interruption that clears itself.
  mgRate: 12,       // machine-gun pellets fired per second during a horde. It scales with hordeGrow too
                    // (see startHorde): at 6/s single-target the gun simply could not out-kill a grown
                    // wave — Oliver died on the second horde of every run.
  mgSpread: 6,      // ± degrees of pellet spread — a cone that sweeps bodies, not a needle up the middle
  mgPelletR: 0.5,   // m of extra hit radius on a pellet: a fat round. "Bigger ball = more damage."
  dmgPelletHp: 2,   // hp a pellet takes off a body — shamblerHp is 2, so the horde gun one-shots them
  mgPickupLen: 8,   // s the machine-gun tin (4th delivery) auto-fires outside hordes
  fps: 60,          // frame cap — 30 halves battery/heat but Oliver felt it; smoothness wins (0 = uncapped)
  runnerSpeed: 3.2, // runner ('f') speed multiplier over the shamble
  runnerVMax: 4.2,  // hard runner speed cap — the late-game ramp must stay humanly reactable
  shamblerHp: 2,    // splat-quality hits a classic shambler ('a'/'b') soaks before it dies — only the runner ('f') is still one-shot glass
  // fire: the flame ball no longer just kills what it touches, it starts an epidemic.
  burnTime: 3.0,    // s a body burns before the fire goes out
  burnDps: 2.0,     // hp lost per second while burning — burnTime*burnDps must exceed bruteHp or tanks walk out of the fire
  burnSpread: 2.2,  // m — a burning body ignites anything this close, every frame it burns
  burnIgniteR: 4.5, // m — the flame ball's ignition radius around the body it kills
  burnBallR: 2.4,   // m — the flame ball also lights anything it FLIES PAST. Without this the ball's
                    // full pierce simply killed the whole lane outright and nothing was left to catch fire.
  burnPanic: 1.0,   // walk-speed multiplier while burning (1 = off; crank it for panicked sprinting)
  setCardT: 2.0,    // s the centered SET card holds (the 'kurze unterbrechung' before the horde)
  modalIn: 0.34,    // s the modal swooshes in — icon+title from the right, body cascading from the
                    // left, each on easeOutBack. The gesture that dismisses is swallowed until it
                    // lands, so a panic tap can't skip a popup before it has been read.
  bruteStride: 0.5, // m the brute covers per lurch frame — it is the slowest thing on court, so
                    // its cycle is driven by ground covered rather than by the clock
  bruteHp: 5,       // splat-quality hits (or pellets) a brute ('g') soaks before it dies — one wound skin per stage
  shieldDown: 1.5,  // s a shield zombie's ('s') chair stays dropped after a block — the kill window
  meleeRange: 1.7,  // m — a racket swish cleaves shamblers this close to you
  racketHp: 3,      // splat-quality hits a racket zombie (mini-boss) takes before it dies
  racketSpeed: 2.8, // m/s the racket zombie shambles to chase a ball
  racketQMax: 0.55, // its return quality is capped here (slower, sloppier than the tennis CPU)
  racketFlub: 0.2,  // chance the racket zombie whiffs a return
  missHud: 0,       // show the last miss reason on screen (full log: T.G.missLog) — off; dev-only
  killPips: 1,      // splatter: show the kills-to-next-point pips on the scoreboard
};

// the death animation's timeline, in seconds of G.eatenT. A: thrash · B: you burst into gore
// · C: the summary fades in. The restart tap is gated past the whole thing so a panic tap
// during the burst can't skip it.
// assets/audio/tennis-applaus.wav runs 4.16s and always plays in full, so the crowd must keep
// clapping at least that long — every cheer() call was passing a shorter beat, which left the
// stand sitting back down while the applause was still audible.
export const APPLAUSE_T = 4.2;

export const EATEN_BURST = 0.5, EATEN_SUMMARY = 1.6, EATEN_RESTART = 2.2;

// UI accent colours, one place so the whole HUD can be re-tuned at once. Deliberately
// desaturated from the original arcade primaries: they were shouting over the artwork.
// (NOT the gore — blood and piles keep their loud reds; only text and interactive UI.)
export const UI = { hot: '#d9705f', warm: '#e0cc72', pick: '#cbd06a', cream: '#e8e8dc',
                    dim: '#8fa0b8', bad: '#a34a42', ball: '#dbe063' };

// netW was the singles-stick width (10.06) while the court is drawn to the DOUBLES lines, so the
// net stopped 0.46 m short of each sideline and visibly failed to meet the court edge. The posts
// now stand exactly on the doubles sidelines.
export const COURT = { L: 23.77, W: 8.23, dblW: 10.97, netZ: 11.885, netH: 0.914, netW: 10.97 };
COURT.svcFar = COURT.netZ - 6.4;   // far service line
COURT.svcNear = COURT.netZ + 6.4;  // near service line

// world sizes (meters)
export const PLAYER_H = 1.88;
// The chapter-boss ROSTER. One design per chapter, cycling — chapter 5 gets design 1 again, but at
// far more hp and much bigger, so it still escalates. Each entry is pure DATA so adding a design is a
// sheet plus a row here, never a change to drawZombie.
//   walk:   two frames, stepped off DISTANCE COVERED (never time — see the animation invariant)
//   wounds: damage skins, healthiest first. However many there are, they are spread evenly over hp.
//   throws: the same states mid-throw, used while windT > 0. Index is clamped, so a design with
//           fewer throw frames than wound stages simply reuses its last one.
// Every name must be ALL LOWERCASE and a whole word — see the case-collision note in the pipeline.
export const BOSS_ART = [
  { name: 'THE GROUNDSKEEPER', walk: ['z_boss1', 'z_boss2'],
    wounds: ['z_bossw1', 'z_bossw2', 'z_bossw3'],
    throws: ['z_bosst0', 'z_bosst1', 'z_bosst2', 'z_bosst3'] },
  { name: 'THE LINE JUDGE', walk: ['z_judge1', 'z_judge2'],
    wounds: ['z_judgew'], throws: ['z_judget', 'z_judgewt'] },
  { name: 'THE CHAIR UMPIRE', walk: ['z_chair1', 'z_chair2'],
    wounds: ['z_chairw'], throws: ['z_chairt', 'z_chairwt'] },
];

export const MACH_H = 1.15; // a ball machine stands about waist high — it must read as furniture, not as a body
export const BOY_H = 1.5; // was 1.2 — the mopping boy read as a distant speck at that scale
// how far off-court a boy starts. The mop boy comes in from just off-screen (he is slow, and
// waiting 8s for him to walk into shot is dead time); a fetching boy sprints in from further out.
export const BOY_ENTER = { mop: 9.5, run: 13 };
export const UMP_H = 3.0;
// The chair is 1.12 m wide as drawn (x_ump is 42x112 at UMP_H 3.0), so at 5.6 its near legs stood
// 0.45 m INSIDE the doubles line, on the court. 6.05 puts them exactly on the line; anything much
// beyond ~6.3 clips the right edge of the portrait viewport (7.1 was fully off-screen).
export const UMP_X = 6.05;

// contact rules: outside this height band the ball can't be hit (below = it's past you)
export const CONTACT = { minY: 0.24, maxY: 2.3 };

// volleys (pre-bounce contact) get extra forgiveness: the ball passes at full speed and
// there's no bounce cue to time against, so reach and swing window widen by these factors
export const VOLLEY = { reach: 1.4, window: 1.8 };

// how deep from the far/near baseline a player's interception zone extends
export const ZONE_DEPTH = 9.5;

// recovery positions between shots
export const HOME = { P: { x: 0, z: 22.8 }, O: { x: 0, z: 2.5 } };

// where the near player is allowed to move
export const P_BOUNDS = { x: 6.5, zMin: COURT.netZ + 1.2, zMax: 26 };

// serve toss: release height and upward speed (apex derives from these + gravity)
export const TOSS = { y0: 1.8, vy: 4.6 };

// shot target depth from the receiving baseline, by aim (up = deep, none = mid, down = short)
export const SHOT_DEPTH = { deep: 3.0, mid: 5.4, short: 8.6 };

// how long swing/serve poses hold before returning to idle (s)
export const POSE_TIME = 0.38;

// the server's idle ball bounce: sideways offset to the free hand, apex height, tempo.
// tempo drives the ball, the hand sprite AND the pock sound — one value, always in sync.
export const BOUNCE_IDLE = { dx: 0.5, apex: 0.55, tempo: 3.6 };

// generated sprite sheets: the idle pose is this many pixels tall; all scales derive from it
export const SPRITE_H = 224; // 2x remaster (was 112). RES is 3, so the player at the baseline
                             // rasterises into ~170 DEVICE pixels — a 112px source was being UPSCALED
                             // 1.5x, which is why near sprites looked soft and mushy. Every sprite that
                             // goes through drawChar/drawBoy/the wound-stage height rule must share this
                             // scale, so unmatched sprites were 2x-upscaled rather than left at 112.