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// Wispmarch nights: 40 hand-tuned short levels (data table, not random), stars, progress save, streak and
// "beat my score" links. Pure (no DOM) so node --test checks it. (c) 2026 CyberMax. All rights reserved.
import { hash, dayNumber, dateOf } from './cmx.js';

export const FREE_NIGHTS = 20;           // nights 1-20 are free for everyone; 21+ need the CyberMax Fun Pass
export const NIGHT_XP = 1.5;             // short nights level you up faster than the 10-minute run

// A new twist every 5 nights; every 10th night is a challenge night.
export const GROUPS = [
  { from: 1, name: 'First Light', icon: '✦', twist: 'Moths, then crawlers' },
  { from: 6, name: 'Wraith Reeds', icon: '👻', twist: 'Wraiths surge in waves' },
  { from: 11, name: 'Elite Hours', icon: '👹', twist: 'Brutes stalk the reeds' },
  { from: 16, name: 'Fog Banks', icon: '🌫', twist: 'Your light reaches less far' },
  { from: 21, name: 'Moth Gale', icon: '🦋', twist: 'Moths fly 45% faster' },
  { from: 26, name: 'Glass Lantern', icon: '💎', twist: 'Half light, +50% damage' },
  { from: 31, name: "Herald's Court", icon: '👑', twist: 'Heralds hunt you mid-night' },
  { from: 36, name: 'Darkest Hour', icon: '🌑', twist: 'Fog, fast moths and elites' },
];

// Columns: name, seconds, mix [moth, crawler, wraith], on-screen target [start, end], spawns/s [start, end],
// hp multiplier [start, end], modifiers, swarm times (s), elite every (s, 0 = none), boss [kind, at s, hp mult] or 0,
// third-star kill target (or 'boss' = banish the boss).
const H = 'herald', W = 'warden';
const ROWS = [
  // 1-5 First Light
  ['First Spark', 45, [1, 0, 0], [14, 28], [1.4, 2.2], [1, 1.05], [], [], 0, 0, 60],
  ['Reed Path', 60, [1, 0, 0], [18, 38], [1.6, 3], [1, 1.15], [], [40], 0, 0, 110],
  ['Crawling Mud', 60, [3, 1, 0], [20, 40], [1.6, 3], [1, 1.2], [], [], 0, 0, 100],
  ['Lily Hollow', 75, [3, 1, 0], [22, 48], [1.8, 3.4], [1.05, 1.3], [], [50], 0, 0, 130],
  ['Brute Bridge', 90, [3, 1.4, 0], [24, 56], [2, 3.6], [1.1, 1.4], [], [40, 75], 0, [H, 60, 0.4], 150],
  // 6-10 Wraith Reeds
  ['Pale Shapes', 75, [3, 1, 0.8], [24, 50], [2, 3.4], [1.1, 1.35], [], [], 0, 0, 120],
  ['Whisper Marsh', 90, [3, 1.2, 1], [26, 56], [2, 3.8], [1.15, 1.45], [], [60], 0, 0, 130],
  ['Sunken Bells', 90, [2.5, 1.2, 1.4], [28, 60], [2.2, 4], [1.2, 1.55], [], [45], 0, 0, 150],
  ['Hollow Choir', 105, [2.5, 1.3, 1.6], [30, 64], [2.2, 4.2], [1.25, 1.65], [], [50, 90], 0, 0, 180],
  ['Moth Storm', 120, [1, 0, 0], [30, 70], [3, 5], [1.3, 1.7], ['swiftmoths'], [20, 40, 60, 80, 100], 0, 0, 450],
  // 11-15 Elite Hours
  ['Heavy Steps', 90, [3, 1.4, 1], [28, 58], [2.2, 4], [1.3, 1.65], [], [], 40, 0, 150],
  ['Iron Reeds', 105, [3, 1.5, 1.1], [30, 62], [2.2, 4.2], [1.35, 1.75], [], [60], 35, 0, 170],
  ['Bog Kings', 105, [2.6, 1.6, 1.2], [32, 66], [2.4, 4.4], [1.4, 1.85], [], [45, 85], 30, 0, 170],
  ['Toll of Horns', 120, [2.6, 1.6, 1.4], [34, 70], [2.4, 4.6], [1.45, 1.95], [], [70], 28, 0, 200],
  ['Gatekeeper', 120, [2.6, 1.6, 1.4], [34, 72], [2.5, 4.8], [1.5, 2], [], [50, 95], 32, [H, 80, 0.8], 'boss'],
  // 16-20 Fog Banks
  ['Grey Veil', 105, [3, 1.4, 1.2], [32, 64], [2.4, 4.4], [1.5, 1.95], ['fog'], [], 0, 0, 140],
  ['Low Mist', 105, [3, 1.5, 1.3], [34, 68], [2.4, 4.6], [1.55, 2.05], ['fog'], [60], 40, 0, 180],
  ['Blind Fen', 120, [2.6, 1.6, 1.5], [36, 72], [2.6, 4.8], [1.6, 2.15], ['fog'], [45, 90], 35, 0, 180],
  ['Shroud Walk', 120, [2.6, 1.7, 1.6], [38, 76], [2.6, 5], [1.65, 2.25], ['fog'], [60, 100], 30, 0, 190],
  ['Herald Hunt', 150, [2.6, 1.6, 1.4], [36, 76], [2.6, 5], [1.7, 2.3], ['fog'], [70, 120], 45, [H, 30, 1.4], 'boss'],
  // 21-25 Moth Gale (Fun Pass)
  ['Wingstorm', 120, [3.5, 1.2, 1], [36, 72], [2.8, 5.2], [1.6, 2.1], ['swiftmoths'], [50, 90], 0, 0, 220],
  ['Dust Wings', 120, [3.5, 1.3, 1.2], [38, 74], [2.8, 5.4], [1.65, 2.2], ['swiftmoths'], [40, 80], 40, 0, 210],
  ['Flutter Night', 135, [3.2, 1.4, 1.4], [38, 76], [3, 5.6], [1.65, 2.25], ['swiftmoths'], [45, 90, 120], 35, 0, 230],
  ['Gale Crossing', 135, [3.2, 1.5, 1.5], [40, 80], [3, 5.8], [1.7, 2.3], ['swiftmoths'], [60, 110], 30, 0, 240],
  ['Eye of Wings', 150, [3.2, 1.5, 1.5], [40, 82], [3, 6], [1.8, 2.4], ['swiftmoths'], [50, 100, 130], 30, [H, 90, 1.4], 'boss'],
  // 26-30 Glass Lantern
  ['Brittle Glow', 120, [3, 1.5, 1.2], [36, 72], [2.8, 5.2], [1.6, 2.1], ['glass'], [60], 0, 0, 180],
  ['Thin Flame', 120, [3, 1.5, 1.3], [38, 74], [2.8, 5.4], [1.65, 2.2], ['glass'], [45, 90], 40, 0, 200],
  ['Cracked Wick', 135, [2.8, 1.6, 1.5], [38, 76], [3, 5.6], [1.7, 2.3], ['glass', 'doubleshards'], [50, 100], 35, 0, 300],
  ['Shard Rain', 135, [2.8, 1.6, 1.6], [40, 78], [3, 5.8], [1.75, 2.35], ['glass', 'doubleshards'], [60, 110], 30, 0, 320],
  ["Warden's Wake", 180, [2.8, 1.6, 1.5], [40, 82], [3, 6], [1.8, 2.5], ['glass'], [60, 150], 40, [W, 60, 0.22], 'boss'],
  // 31-35 Herald's Court
  ['First Herald', 135, [3, 1.6, 1.4], [44, 86], [3, 5.6], [1.85, 2.5], [], [70], 40, [H, 45, 1.6], 220],
  ['Twin Banners', 150, [3, 1.6, 1.5], [46, 90], [3, 5.8], [1.9, 2.55], ['embers'], [50, 110], 35, [H, 60, 1.7], 260],
  ['Court of Ash', 150, [2.8, 1.7, 1.6], [48, 94], [3.2, 6], [1.95, 2.6], ['embers'], [45, 95, 130], 32, [H, 50, 1.8], 260],
  ['Crown of Reeds', 165, [2.8, 1.7, 1.7], [50, 98], [3.2, 6.2], [2, 2.7], [], [60, 120], 30, [H, 70, 2], 250],
  ['Throne Fen', 165, [2.8, 1.8, 1.8], [50, 100], [3.2, 6.4], [2, 2.7], [], [50, 100, 140], 30, [H, 40, 2], 'boss'],
  // 36-40 Darkest Hour
  ['Starless', 150, [3.2, 1.6, 1.5], [48, 94], [3.2, 6], [2, 2.7], ['fog', 'swiftmoths'], [60, 120], 35, 0, 230],
  ['Black Water', 150, [3.2, 1.7, 1.6], [50, 98], [3.2, 6.2], [2.05, 2.8], ['fog', 'swiftmoths'], [50, 100], 30, 0, 230],
  ['Last Candles', 165, [3, 1.8, 1.7], [52, 102], [3.4, 6.4], [2.1, 2.9], ['fog', 'swiftmoths'], [45, 95, 140], 28, 0, 250],
  ['Edge of Dawn', 165, [3, 1.8, 1.8], [54, 106], [3.4, 6.6], [2.15, 3], ['fog', 'swiftmoths'], [60, 120, 150], 26, [H, 90, 2.2], 270],
  ['The Longest Night', 240, [3, 1.8, 1.8], [52, 110], [3.4, 7], [2.2, 3.2], ['fog', 'swiftmoths'], [40, 90, 140, 190], 30, [W, 120, 0.35], 'boss'],
];

export const NIGHTS = ROWS.map(([name, dur, mix, spawn, rate, hp, mods, swarms, elite, boss, star3], i) => {
  const n = i + 1;
  return {
    n, name, dur, mix, spawn, rate, hp, mods, swarms, elite,
    boss: boss ? { kind: boss[0], at: boss[1], hp: boss[2] } : null,
    kills: typeof star3 === 'number' ? star3 : 0,
    star3: star3 === 'boss' ? 'boss' : 'kills',
    challenge: n % 10 === 0,
    pass: n > FREE_NIGHTS,
  };
});
export const MAX_STARS = NIGHTS.length * 3;
export const groupOf = (n) => { let g = GROUPS[0]; for (const x of GROUPS) if (n >= x.from) g = x; return g; };
/** True when night n is the first of a new twist group (shown as "New twist" in game). */
export const isTwist = (n) => GROUPS.some((g) => g.from === n);
/** Every night has a fixed seed, so everyone plays the same hand-tuned night. */
export const nightSeed = (n) => hash(`wispmarch:night:${n}`);

/** The three star goals of a night, as short labels (the in-game goal line). */
export function starGoals(N) {
  return ['Reach dawn', 'Keep half your light', N.star3 === 'boss' ? `Banish the ${N.boss.kind === 'warden' ? 'Warden' : 'Herald'}` : `${N.kills} gloom banished`];
}
/** Stars for a finished night: 1 = reached dawn, 2 = and at least half light left, 3 = and the kill/boss target. */
export function starsFor(N, r) {
  if (!N || !r || !r.won) return 0;
  let s = 1;
  if (r.hpFrac >= 0.5) s++;
  if (N.star3 === 'boss' ? r.boss : r.kills >= N.kills) s++;
  return s;
}

// ---------------------------------------------------------------- progress
export function defaultProg() { return { stars: {}, best: 0, played: 0 }; }
export function loadProg(raw) {
  const p = defaultProg();
  if (!raw || typeof raw !== 'object') return p;
  const N = NIGHTS.length, int = (x) => (Number.isFinite(x) && x >= 0 ? Math.floor(x) : 0);
  if (raw.stars && typeof raw.stars === 'object') {
    for (const k of Object.keys(raw.stars)) { const n = Number(k), s = int(raw.stars[k]); if (Number.isInteger(n) && n >= 1 && n <= N && s > 0) p.stars[n] = Math.min(3, s); }
  }
  p.best = Math.min(N, int(raw.best));
  p.played = Math.min(N, int(raw.played));
  for (const k in p.stars) p.best = Math.max(p.best, Number(k));
  return p;
}
/**
 * Can night n be played? 'open' | 'locked' (clear the night before first) | 'pass' (needs the Fun Pass).
 * Never takes away a night already reached: any night up to the highest one ever started stays open, pass or not.
 */
export function access(n, prog, pro) {
  if (!Number.isInteger(n) || n < 1 || n > NIGHTS.length) return 'locked';
  const reachable = n === 1 || n <= prog.played || !!prog.stars[n - 1];
  if (!reachable) return 'locked';
  if (n > FREE_NIGHTS && !pro && n > prog.played) return 'pass';
  return 'open';
}
/** Mark a night as started (only call when access() is 'open'). */
export function markPlayed(prog, n) { prog.played = Math.max(prog.played, n); return prog; }
/** Save a finished night's stars; keeps the best. Returns { stars, gained, first }. */
export function recordNight(prog, n, stars) {
  const had = prog.stars[n] || 0;
  if (stars > had) prog.stars[n] = stars;
  if (stars > 0) prog.best = Math.max(prog.best, n);
  return { stars, gained: Math.max(0, stars - had), first: had === 0 && stars > 0 };
}
export const totalStars = (prog) => Object.values(prog.stars).reduce((a, b) => a + b, 0);
/** The night the Play button should start: the first open night not yet cleared, else the highest open night. */
export function nextNight(prog, pro) {
  let hi = 1;
  for (let n = 1; n <= NIGHTS.length; n++) {
    if (access(n, prog, pro) !== 'open') continue;
    if (!prog.stars[n]) return n;
    hi = n;
  }
  return hi;
}

// ---------------------------------------------------------------- streak (consecutive days with a finished run)
export function defaultStreak() { return { n: 0, best: 0, last: '' }; }
export function loadStreak(raw) {
  const s = defaultStreak();
  if (!raw || typeof raw !== 'object') return s;
  const int = (x) => (Number.isFinite(x) && x >= 0 ? Math.min(100000, Math.floor(x)) : 0);
  s.n = int(raw.n); s.best = Math.max(int(raw.best), s.n);
  if (typeof raw.last === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(raw.last)) s.last = raw.last;
  return s;
}
const prevDay = (iso) => dateOf(dayNumber(iso) - 1);
/** Count today. Same day: no change. Day after the last one: +1. A gap: back to 1. */
export function bumpStreak(s, iso) {
  if (s.last === iso) return s;
  s.n = s.last && s.last === prevDay(iso) ? s.n + 1 : 1;
  s.last = iso; s.best = Math.max(s.best, s.n);
  return s;
}
/** The streak as it stands today (0 if the last played day is older than yesterday). */
export function liveStreak(s, iso) { return s.last === iso || (s.last && s.last === prevDay(iso)) ? s.n : 0; }

// ---------------------------------------------------------------- "beat my score" links: ?seed=<n>&score=<n>&lvl=<n>
export const MAX_SCORE = 99999999;
/** Parse a share link's query. Only plain bounded integers are kept; anything else is ignored. null if nothing usable. */
export function parseLink(search) {
  let q;
  try { q = new URLSearchParams(typeof search === 'string' ? search : ''); } catch { return null; }
  const int = (k, lo, hi) => {
    const v = q.get(k);
    if (v == null || !/^\d{1,10}$/.test(v)) return null;
    const x = Number(v);
    return x >= lo && x <= hi ? x : null;
  };
  const seed = int('seed', 0, 4294967295), score = int('score', 0, MAX_SCORE), lvl = int('lvl', 1, NIGHTS.length);
  if (seed === null && lvl === null) return null;
  return { seed, score, lvl };
}
/** Build the query for a link (round-trips through parseLink). */
export function linkQuery({ seed = null, score = null, lvl = null } = {}) {
  const q = [];
  if (Number.isInteger(seed) && seed >= 0 && seed <= 4294967295) q.push(`seed=${seed}`);
  if (Number.isInteger(score) && score >= 0 && score <= MAX_SCORE) q.push(`score=${score}`);
  if (Number.isInteger(lvl) && lvl >= 1 && lvl <= NIGHTS.length) q.push(`lvl=${lvl}`);
  return q.length ? `?${q.join('&')}` : '';
}

// ---------------------------------------------------------------- Trials (full-game mode, games lane GM 9 Oct 2026)
// Replay any night you have cleared at Danger 1-3 (tougher gloom, denser swarms; fog at Danger 2, fast moths at 3).
// Clearing a Danger level earns that night's crown for it (3 per night, 120 in all) and more Embers for the shop.
export const DANGER = [
  null,
  { name: 'Danger 1', hp: 1.35, rate: 1.2, crowd: 1.15, mods: [], embers: 1.5 },
  { name: 'Danger 2', hp: 1.7, rate: 1.4, crowd: 1.3, mods: ['fog'], embers: 2 },
  { name: 'Danger 3', hp: 2.1, rate: 1.6, crowd: 1.45, mods: ['fog', 'swiftmoths'], embers: 3 },
];
export const MAX_DANGER = 3;
export const MAX_CROWNS = NIGHTS.length * MAX_DANGER;
/** Night N played at Danger d (a new object; the night table is never changed). */
export function trialNight(N, d) {
  const D = DANGER[d];
  if (!N || !D) return N;
  const mul = (a, m) => [a[0] * m, a[1] * m];
  return { ...N, hp: mul(N.hp, D.hp), rate: mul(N.rate, D.rate), spawn: mul(N.spawn, D.crowd), mods: [...new Set([...N.mods, ...D.mods])], danger: d, dangerName: D.name };
}
/** Clean a saved trials map { night: highest danger cleared }. */
export function loadTrials(raw) {
  const t = {};
  if (!raw || typeof raw !== 'object') return t;
  for (const k of Object.keys(raw)) { const n = Number(k), d = Math.floor(Number(raw[k])); if (Number.isInteger(n) && n >= 1 && n <= NIGHTS.length && d >= 1) t[n] = Math.min(MAX_DANGER, d); }
  return t;
}
export const crowns = (trials) => Object.values(trials).reduce((a, b) => a + b, 0);
/** Trials open for night n: cleared at least once. Returns the next danger to try (1..3) or 0 when all are crowned. */
export function nextDanger(prog, trials, n) { return prog.stars[n] ? ((trials[n] || 0) < MAX_DANGER ? (trials[n] || 0) + 1 : MAX_DANGER) : 0; }
/** The trial the Play button starts: the lowest cleared night with a danger level left, else the highest cleared night. */
export function nextTrial(prog, trials) {
  let hi = 0;
  for (let n = 1; n <= NIGHTS.length; n++) if (prog.stars[n]) { hi = n; if ((trials[n] || 0) < MAX_DANGER) return n; }
  return hi;
}

	// Wispmarch nights: 40 hand-tuned short levels (data table, not random), stars, progress save, streak and
	// "beat my score" links. Pure (no DOM) so node --test checks it. (c) 2026 CyberMax. All rights reserved.
	import { hash, dayNumber, dateOf } from './cmx.js';

	export const FREE_NIGHTS = 20; // nights 1-20 are free for everyone; 21+ need the CyberMax Fun Pass
	export const NIGHT_XP = 1.5; // short nights level you up faster than the 10-minute run

	// A new twist every 5 nights; every 10th night is a challenge night.
	export const GROUPS = [
	{ from: 1, name: 'First Light', icon: '✦', twist: 'Moths, then crawlers' },
	{ from: 6, name: 'Wraith Reeds', icon: '👻', twist: 'Wraiths surge in waves' },
	{ from: 11, name: 'Elite Hours', icon: '👹', twist: 'Brutes stalk the reeds' },
	{ from: 16, name: 'Fog Banks', icon: '🌫', twist: 'Your light reaches less far' },
	{ from: 21, name: 'Moth Gale', icon: '🦋', twist: 'Moths fly 45% faster' },
	{ from: 26, name: 'Glass Lantern', icon: '💎', twist: 'Half light, +50% damage' },
	{ from: 31, name: "Herald's Court", icon: '👑', twist: 'Heralds hunt you mid-night' },
	{ from: 36, name: 'Darkest Hour', icon: '🌑', twist: 'Fog, fast moths and elites' },
	];

	// Columns: name, seconds, mix [moth, crawler, wraith], on-screen target [start, end], spawns/s [start, end],
	// hp multiplier [start, end], modifiers, swarm times (s), elite every (s, 0 = none), boss [kind, at s, hp mult] or 0,
	// third-star kill target (or 'boss' = banish the boss).
	const H = 'herald', W = 'warden';
	const ROWS = [
	// 1-5 First Light
	['First Spark', 45, [1, 0, 0], [14, 28], [1.4, 2.2], [1, 1.05], [], [], 0, 0, 60],
	['Reed Path', 60, [1, 0, 0], [18, 38], [1.6, 3], [1, 1.15], [], [40], 0, 0, 110],
	['Crawling Mud', 60, [3, 1, 0], [20, 40], [1.6, 3], [1, 1.2], [], [], 0, 0, 100],
	['Lily Hollow', 75, [3, 1, 0], [22, 48], [1.8, 3.4], [1.05, 1.3], [], [50], 0, 0, 130],
	['Brute Bridge', 90, [3, 1.4, 0], [24, 56], [2, 3.6], [1.1, 1.4], [], [40, 75], 0, [H, 60, 0.4], 150],
	// 6-10 Wraith Reeds
	['Pale Shapes', 75, [3, 1, 0.8], [24, 50], [2, 3.4], [1.1, 1.35], [], [], 0, 0, 120],
	['Whisper Marsh', 90, [3, 1.2, 1], [26, 56], [2, 3.8], [1.15, 1.45], [], [60], 0, 0, 130],
	['Sunken Bells', 90, [2.5, 1.2, 1.4], [28, 60], [2.2, 4], [1.2, 1.55], [], [45], 0, 0, 150],
	['Hollow Choir', 105, [2.5, 1.3, 1.6], [30, 64], [2.2, 4.2], [1.25, 1.65], [], [50, 90], 0, 0, 180],
	['Moth Storm', 120, [1, 0, 0], [30, 70], [3, 5], [1.3, 1.7], ['swiftmoths'], [20, 40, 60, 80, 100], 0, 0, 450],
	// 11-15 Elite Hours
	['Heavy Steps', 90, [3, 1.4, 1], [28, 58], [2.2, 4], [1.3, 1.65], [], [], 40, 0, 150],
	['Iron Reeds', 105, [3, 1.5, 1.1], [30, 62], [2.2, 4.2], [1.35, 1.75], [], [60], 35, 0, 170],
	['Bog Kings', 105, [2.6, 1.6, 1.2], [32, 66], [2.4, 4.4], [1.4, 1.85], [], [45, 85], 30, 0, 170],
	['Toll of Horns', 120, [2.6, 1.6, 1.4], [34, 70], [2.4, 4.6], [1.45, 1.95], [], [70], 28, 0, 200],
	['Gatekeeper', 120, [2.6, 1.6, 1.4], [34, 72], [2.5, 4.8], [1.5, 2], [], [50, 95], 32, [H, 80, 0.8], 'boss'],
	// 16-20 Fog Banks
	['Grey Veil', 105, [3, 1.4, 1.2], [32, 64], [2.4, 4.4], [1.5, 1.95], ['fog'], [], 0, 0, 140],
	['Low Mist', 105, [3, 1.5, 1.3], [34, 68], [2.4, 4.6], [1.55, 2.05], ['fog'], [60], 40, 0, 180],
	['Blind Fen', 120, [2.6, 1.6, 1.5], [36, 72], [2.6, 4.8], [1.6, 2.15], ['fog'], [45, 90], 35, 0, 180],
	['Shroud Walk', 120, [2.6, 1.7, 1.6], [38, 76], [2.6, 5], [1.65, 2.25], ['fog'], [60, 100], 30, 0, 190],
	['Herald Hunt', 150, [2.6, 1.6, 1.4], [36, 76], [2.6, 5], [1.7, 2.3], ['fog'], [70, 120], 45, [H, 30, 1.4], 'boss'],
	// 21-25 Moth Gale (Fun Pass)
	['Wingstorm', 120, [3.5, 1.2, 1], [36, 72], [2.8, 5.2], [1.6, 2.1], ['swiftmoths'], [50, 90], 0, 0, 220],
	['Dust Wings', 120, [3.5, 1.3, 1.2], [38, 74], [2.8, 5.4], [1.65, 2.2], ['swiftmoths'], [40, 80], 40, 0, 210],
	['Flutter Night', 135, [3.2, 1.4, 1.4], [38, 76], [3, 5.6], [1.65, 2.25], ['swiftmoths'], [45, 90, 120], 35, 0, 230],
	['Gale Crossing', 135, [3.2, 1.5, 1.5], [40, 80], [3, 5.8], [1.7, 2.3], ['swiftmoths'], [60, 110], 30, 0, 240],
	['Eye of Wings', 150, [3.2, 1.5, 1.5], [40, 82], [3, 6], [1.8, 2.4], ['swiftmoths'], [50, 100, 130], 30, [H, 90, 1.4], 'boss'],
	// 26-30 Glass Lantern
	['Brittle Glow', 120, [3, 1.5, 1.2], [36, 72], [2.8, 5.2], [1.6, 2.1], ['glass'], [60], 0, 0, 180],
	['Thin Flame', 120, [3, 1.5, 1.3], [38, 74], [2.8, 5.4], [1.65, 2.2], ['glass'], [45, 90], 40, 0, 200],
	['Cracked Wick', 135, [2.8, 1.6, 1.5], [38, 76], [3, 5.6], [1.7, 2.3], ['glass', 'doubleshards'], [50, 100], 35, 0, 300],
	['Shard Rain', 135, [2.8, 1.6, 1.6], [40, 78], [3, 5.8], [1.75, 2.35], ['glass', 'doubleshards'], [60, 110], 30, 0, 320],
	["Warden's Wake", 180, [2.8, 1.6, 1.5], [40, 82], [3, 6], [1.8, 2.5], ['glass'], [60, 150], 40, [W, 60, 0.22], 'boss'],
	// 31-35 Herald's Court
	['First Herald', 135, [3, 1.6, 1.4], [44, 86], [3, 5.6], [1.85, 2.5], [], [70], 40, [H, 45, 1.6], 220],
	['Twin Banners', 150, [3, 1.6, 1.5], [46, 90], [3, 5.8], [1.9, 2.55], ['embers'], [50, 110], 35, [H, 60, 1.7], 260],
	['Court of Ash', 150, [2.8, 1.7, 1.6], [48, 94], [3.2, 6], [1.95, 2.6], ['embers'], [45, 95, 130], 32, [H, 50, 1.8], 260],
	['Crown of Reeds', 165, [2.8, 1.7, 1.7], [50, 98], [3.2, 6.2], [2, 2.7], [], [60, 120], 30, [H, 70, 2], 250],
	['Throne Fen', 165, [2.8, 1.8, 1.8], [50, 100], [3.2, 6.4], [2, 2.7], [], [50, 100, 140], 30, [H, 40, 2], 'boss'],
	// 36-40 Darkest Hour
	['Starless', 150, [3.2, 1.6, 1.5], [48, 94], [3.2, 6], [2, 2.7], ['fog', 'swiftmoths'], [60, 120], 35, 0, 230],
	['Black Water', 150, [3.2, 1.7, 1.6], [50, 98], [3.2, 6.2], [2.05, 2.8], ['fog', 'swiftmoths'], [50, 100], 30, 0, 230],
	['Last Candles', 165, [3, 1.8, 1.7], [52, 102], [3.4, 6.4], [2.1, 2.9], ['fog', 'swiftmoths'], [45, 95, 140], 28, 0, 250],
	['Edge of Dawn', 165, [3, 1.8, 1.8], [54, 106], [3.4, 6.6], [2.15, 3], ['fog', 'swiftmoths'], [60, 120, 150], 26, [H, 90, 2.2], 270],
	['The Longest Night', 240, [3, 1.8, 1.8], [52, 110], [3.4, 7], [2.2, 3.2], ['fog', 'swiftmoths'], [40, 90, 140, 190], 30, [W, 120, 0.35], 'boss'],
	];

	export const NIGHTS = ROWS.map(([name, dur, mix, spawn, rate, hp, mods, swarms, elite, boss, star3], i) => {
	const n = i + 1;
	return {
	n, name, dur, mix, spawn, rate, hp, mods, swarms, elite,
	boss: boss ? { kind: boss[0], at: boss[1], hp: boss[2] } : null,
	kills: typeof star3 === 'number' ? star3 : 0,
	star3: star3 === 'boss' ? 'boss' : 'kills',
	challenge: n % 10 === 0,
	pass: n > FREE_NIGHTS,
	};
	});
	export const MAX_STARS = NIGHTS.length * 3;
	export const groupOf = (n) => { let g = GROUPS[0]; for (const x of GROUPS) if (n >= x.from) g = x; return g; };
	/** True when night n is the first of a new twist group (shown as "New twist" in game). */
	export const isTwist = (n) => GROUPS.some((g) => g.from === n);
	/** Every night has a fixed seed, so everyone plays the same hand-tuned night. */
	export const nightSeed = (n) => hash(`wispmarch:night:${n}`);

	/** The three star goals of a night, as short labels (the in-game goal line). */
	export function starGoals(N) {
	return ['Reach dawn', 'Keep half your light', N.star3 === 'boss' ? `Banish the ${N.boss.kind === 'warden' ? 'Warden' : 'Herald'}` : `${N.kills} gloom banished`];
	}
	/** Stars for a finished night: 1 = reached dawn, 2 = and at least half light left, 3 = and the kill/boss target. */
	export function starsFor(N, r) {
	if (!N \|\| !r \|\| !r.won) return 0;
	let s = 1;
	if (r.hpFrac >= 0.5) s++;
	if (N.star3 === 'boss' ? r.boss : r.kills >= N.kills) s++;
	return s;
	}

	// ---------------------------------------------------------------- progress
	export function defaultProg() { return { stars: {}, best: 0, played: 0 }; }
	export function loadProg(raw) {
	const p = defaultProg();
	if (!raw \|\| typeof raw !== 'object') return p;
	const N = NIGHTS.length, int = (x) => (Number.isFinite(x) && x >= 0 ? Math.floor(x) : 0);
	if (raw.stars && typeof raw.stars === 'object') {
	for (const k of Object.keys(raw.stars)) { const n = Number(k), s = int(raw.stars[k]); if (Number.isInteger(n) && n >= 1 && n <= N && s > 0) p.stars[n] = Math.min(3, s); }
	}
	p.best = Math.min(N, int(raw.best));
	p.played = Math.min(N, int(raw.played));
	for (const k in p.stars) p.best = Math.max(p.best, Number(k));
	return p;
	}
	/**
	* Can night n be played? 'open' \| 'locked' (clear the night before first) \| 'pass' (needs the Fun Pass).
	* Never takes away a night already reached: any night up to the highest one ever started stays open, pass or not.
	*/
	export function access(n, prog, pro) {
	if (!Number.isInteger(n) \|\| n < 1 \|\| n > NIGHTS.length) return 'locked';
	const reachable = n === 1 \|\| n <= prog.played \|\| !!prog.stars[n - 1];
	if (!reachable) return 'locked';
	if (n > FREE_NIGHTS && !pro && n > prog.played) return 'pass';
	return 'open';
	}
	/** Mark a night as started (only call when access() is 'open'). */
	export function markPlayed(prog, n) { prog.played = Math.max(prog.played, n); return prog; }
	/** Save a finished night's stars; keeps the best. Returns { stars, gained, first }. */
	export function recordNight(prog, n, stars) {
	const had = prog.stars[n] \|\| 0;
	if (stars > had) prog.stars[n] = stars;
	if (stars > 0) prog.best = Math.max(prog.best, n);
	return { stars, gained: Math.max(0, stars - had), first: had === 0 && stars > 0 };
	}
	export const totalStars = (prog) => Object.values(prog.stars).reduce((a, b) => a + b, 0);
	/** The night the Play button should start: the first open night not yet cleared, else the highest open night. */
	export function nextNight(prog, pro) {
	let hi = 1;
	for (let n = 1; n <= NIGHTS.length; n++) {
	if (access(n, prog, pro) !== 'open') continue;
	if (!prog.stars[n]) return n;
	hi = n;
	}
	return hi;
	}

	// ---------------------------------------------------------------- streak (consecutive days with a finished run)
	export function defaultStreak() { return { n: 0, best: 0, last: '' }; }
	export function loadStreak(raw) {
	const s = defaultStreak();
	if (!raw \|\| typeof raw !== 'object') return s;
	const int = (x) => (Number.isFinite(x) && x >= 0 ? Math.min(100000, Math.floor(x)) : 0);
	s.n = int(raw.n); s.best = Math.max(int(raw.best), s.n);
	if (typeof raw.last === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(raw.last)) s.last = raw.last;
	return s;
	}
	const prevDay = (iso) => dateOf(dayNumber(iso) - 1);
	/** Count today. Same day: no change. Day after the last one: +1. A gap: back to 1. */
	export function bumpStreak(s, iso) {
	if (s.last === iso) return s;
	s.n = s.last && s.last === prevDay(iso) ? s.n + 1 : 1;
	s.last = iso; s.best = Math.max(s.best, s.n);
	return s;
	}
	/** The streak as it stands today (0 if the last played day is older than yesterday). */
	export function liveStreak(s, iso) { return s.last === iso \|\| (s.last && s.last === prevDay(iso)) ? s.n : 0; }

	// ---------------------------------------------------------------- "beat my score" links: ?seed=<n>&score=<n>&lvl=<n>
	export const MAX_SCORE = 99999999;
	/** Parse a share link's query. Only plain bounded integers are kept; anything else is ignored. null if nothing usable. */
	export function parseLink(search) {
	let q;
	try { q = new URLSearchParams(typeof search === 'string' ? search : ''); } catch { return null; }
	const int = (k, lo, hi) => {
	const v = q.get(k);
	if (v == null \|\| !/^\d{1,10}$/.test(v)) return null;
	const x = Number(v);
	return x >= lo && x <= hi ? x : null;
	};
	const seed = int('seed', 0, 4294967295), score = int('score', 0, MAX_SCORE), lvl = int('lvl', 1, NIGHTS.length);
	if (seed === null && lvl === null) return null;
	return { seed, score, lvl };
	}
	/** Build the query for a link (round-trips through parseLink). */
	export function linkQuery({ seed = null, score = null, lvl = null } = {}) {
	const q = [];
	if (Number.isInteger(seed) && seed >= 0 && seed <= 4294967295) q.push(`seed=${seed}`);
	if (Number.isInteger(score) && score >= 0 && score <= MAX_SCORE) q.push(`score=${score}`);
	if (Number.isInteger(lvl) && lvl >= 1 && lvl <= NIGHTS.length) q.push(`lvl=${lvl}`);
	return q.length ? `?${q.join('&')}` : '';
	}

	// ---------------------------------------------------------------- Trials (full-game mode, games lane GM 9 Oct 2026)
	// Replay any night you have cleared at Danger 1-3 (tougher gloom, denser swarms; fog at Danger 2, fast moths at 3).
	// Clearing a Danger level earns that night's crown for it (3 per night, 120 in all) and more Embers for the shop.
	export const DANGER = [
	null,
	{ name: 'Danger 1', hp: 1.35, rate: 1.2, crowd: 1.15, mods: [], embers: 1.5 },
	{ name: 'Danger 2', hp: 1.7, rate: 1.4, crowd: 1.3, mods: ['fog'], embers: 2 },
	{ name: 'Danger 3', hp: 2.1, rate: 1.6, crowd: 1.45, mods: ['fog', 'swiftmoths'], embers: 3 },
	];
	export const MAX_DANGER = 3;
	export const MAX_CROWNS = NIGHTS.length * MAX_DANGER;
	/** Night N played at Danger d (a new object; the night table is never changed). */
	export function trialNight(N, d) {
	const D = DANGER[d];
	if (!N \|\| !D) return N;
	const mul = (a, m) => [a[0] * m, a[1] * m];
	return { ...N, hp: mul(N.hp, D.hp), rate: mul(N.rate, D.rate), spawn: mul(N.spawn, D.crowd), mods: [...new Set([...N.mods, ...D.mods])], danger: d, dangerName: D.name };
	}
	/** Clean a saved trials map { night: highest danger cleared }. */
	export function loadTrials(raw) {
	const t = {};
	if (!raw \|\| typeof raw !== 'object') return t;
	for (const k of Object.keys(raw)) { const n = Number(k), d = Math.floor(Number(raw[k])); if (Number.isInteger(n) && n >= 1 && n <= NIGHTS.length && d >= 1) t[n] = Math.min(MAX_DANGER, d); }
	return t;
	}
	export const crowns = (trials) => Object.values(trials).reduce((a, b) => a + b, 0);
	/** Trials open for night n: cleared at least once. Returns the next danger to try (1..3) or 0 when all are crowned. */
	export function nextDanger(prog, trials, n) { return prog.stars[n] ? ((trials[n] \|\| 0) < MAX_DANGER ? (trials[n] \|\| 0) + 1 : MAX_DANGER) : 0; }
	/** The trial the Play button starts: the lowest cleared night with a danger level left, else the highest cleared night. */
	export function nextTrial(prog, trials) {
	let hi = 0;
	for (let n = 1; n <= NIGHTS.length; n++) if (prog.stars[n]) { hi = n; if ((trials[n] \|\| 0) < MAX_DANGER) return n; }
	return hi;
	}