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Dune/game/truthtrance.ts
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2026-09-08 07:37:52 +10:00

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import type { ShipmentClaim } from './shipment-promises';
import { TERRITORIES } from './board';
import {
parseCardCountFact,
cardCountFactMatches,
cardCountFactText,
type CardCountFact,
} from './truthtrance-card-count';
import { richeseCards } from './richese-cards';
import {
parsePlanClaim,
planClaimText,
type PlanClaim,
} from './battle-promises';
import { territory } from './board';
import type { Action, Game, Player } from './engine';
import { treacheryDeck } from './cards';
import { CHEAP_HERO_TRAITOR } from './traitors';
import { DUKE_VIDAL_ID } from './duke-vidal';
export type TruthFact =
| CardCountFact
| { kind: 'hand'; name: string }
| { kind: 'traitor'; leader: string }
| { kind: 'spice'; compare: 'eq' | 'gte' | 'lte'; value: number }
| { kind: 'and' | 'or'; terms: TruthFact[] };
export type TruthQuestion =
| ({ kind: 'shipment'; target: string } & ShipmentClaim)
| { kind: 'battlePlan'; target: string; territory: string; claim: PlanClaim }
| { kind: 'fact'; target: string; fact: TruthFact }
| {
kind: 'freeform';
target: string;
text: string;
scope: 'fact' | 'currentTurn';
};
export type TruthAnswer = 'yes' | 'no' | 'unknown';
export type TruthWindow = {
stage: 'priority' | 'ask' | 'answer' | 'unknown';
queue: { player: string; card: string }[];
passed: string[];
question: TruthQuestion | null;
};
export type TruthRecord = {
turn: number;
phase: number;
asker: string;
question: TruthQuestion;
answer: TruthAnswer;
};
export class TruthError extends Error {}
function check(value: unknown, message: string): asserts value {
if (!value) throw new TruthError(message);
}
export const TRUTH_CARD_NAMES = [
...new Set([...treacheryDeck(['ix']), ...richeseCards()].map((c) => c.name)),
].sort();
const record = (value: unknown): Record<string, unknown> => {
check(
value && typeof value === 'object' && !Array.isArray(value),
'Choose a valid Truthtrance question.',
);
return value as Record<string, unknown>;
};
function parseFact(
g: Game,
value: unknown,
depth = 0,
budget = { remaining: 16 },
): TruthFact {
check(
depth <= 4 && budget.remaining-- > 0,
'Truthtrance supports at most 16 clauses and four levels of grouping.',
);
const v = record(value);
if (v.kind === 'handCount') {
try {
return parseCardCountFact(v, TRUTH_CARD_NAMES);
} catch (error) {
throw new TruthError(
error instanceof Error ? error.message : String(error),
);
}
}
if (v.kind === 'hand') {
check(
typeof v.name === 'string' && TRUTH_CARD_NAMES.includes(v.name),
'Choose a known treachery card name.',
);
return { kind: 'hand', name: v.name };
}
if (v.kind === 'traitor') {
check(
typeof v.leader === 'string' &&
(v.leader === CHEAP_HERO_TRAITOR ||
g.players.some((p) => p.leaders.some((l) => l.id === v.leader))),
'Choose a leader in this game.',
);
return { kind: 'traitor', leader: v.leader };
}
if (v.kind === 'spice') {
check(
v.compare === 'eq' || v.compare === 'gte' || v.compare === 'lte',
'Compare currently held spice using exactly, at least, or at most.',
);
check(
typeof v.value === 'number' &&
Number.isSafeInteger(v.value) &&
v.value >= 0,
'Choose a nonnegative whole spice amount within the safe integer range.',
);
return { kind: 'spice', compare: v.compare, value: v.value };
}
check(
(v.kind === 'and' || v.kind === 'or') &&
Array.isArray(v.terms) &&
v.terms.length >= 2 &&
v.terms.length <= 8,
'Combine two to eight fact clauses with AND or OR.',
);
return {
kind: v.kind,
terms: v.terms.map((term) => parseFact(g, term, depth + 1, budget)),
};
}
/** Shared battle discs are valid plan identities, but never expand the traitor inventory. */
function battleLeaderIdentities(g: Game) {
return [
...g.players.flatMap((player) => player.leaders),
...(g.dukeVidal?.leader.id === DUKE_VIDAL_ID ? [g.dukeVidal.leader] : []),
];
}
function parseQuestion(g: Game, asker: string, value: unknown): TruthQuestion {
const v = record(value);
check(
typeof v.target === 'string' &&
v.target !== asker &&
g.players.some((p) => p.id === v.target),
'Ask one other player.',
);
if (v.kind === 'shipment') {
check(
!g.advanced &&
!g.expansions.length &&
g.status === 'playing' &&
g.phase === 5 &&
g.active === v.target &&
!g.players.find((p) => p.id === v.target)!.shipped &&
!g.response &&
!g.decision &&
!g.phaseOpening &&
!g.pendingShipment,
'Automatic shipment promises currently support the active unused shipment in the Basic game without expansions. Finish any pending decision first.',
);
check(
typeof v.territory === 'string' &&
TERRITORIES.some((t) => t.id === v.territory),
'Choose a printed destination territory.',
);
check(
typeof v.minimum === 'number' &&
Number.isSafeInteger(v.minimum) &&
v.minimum >= 1 &&
v.minimum <= 20,
'Choose a minimum of one to twenty physical forces.',
);
return {
kind: 'shipment',
target: v.target,
territory: v.territory,
minimum: v.minimum,
};
}
if (v.kind === 'battlePlan') {
check(
g.phase === 6 &&
g.battle &&
[g.battle.attacker, g.battle.defender].includes(v.target),
'Ask a combatant about the current battle.',
);
return {
kind: 'battlePlan',
target: v.target,
territory: g.battle.territory,
claim: parsePlanClaim(
v.claim,
battleLeaderIdentities(g).map((leader) => leader.id),
),
};
}
if (v.kind === 'fact')
return { kind: 'fact', target: v.target, fact: parseFact(g, v.fact) };
check(
v.kind === 'freeform' &&
typeof v.text === 'string' &&
v.text.trim().length > 0 &&
v.text.length <= 500,
'Write a game-related yes/no question of up to 500 characters.',
);
check(
v.scope === 'fact' || v.scope === 'currentTurn',
'Commitments may only concern the current turn.',
);
return {
kind: 'freeform',
target: v.target,
text: v.text.trim(),
scope: v.scope,
};
}
/** Reparse a committed question without recomputing its answer or binding again.
* The caller supplies the unchanged parent opportunity with its controls restored. */
export function validateTruthQuestionReceipt(
g: Game,
asker: string,
question: TruthQuestion,
) {
check(
JSON.stringify(parseQuestion(g, asker, question)) ===
JSON.stringify(question),
'The completed Truthtrance question does not match its recorded opportunity.',
);
}
/** Revalidate the only new persisted future-action question before any write or projection. */
export function validateSavedShipmentQuestion(g: Game) {
const window = g.truthtrance;
if (window?.question?.kind !== 'shipment') return;
check(
(window.stage === 'answer' || window.stage === 'unknown') &&
Array.isArray(window.queue) &&
window.queue.length > 0 &&
new Set(window.queue.map((entry) => entry?.card)).size ===
window.queue.length &&
window.queue.every(
(entry) =>
entry &&
typeof entry.player === 'string' &&
typeof entry.card === 'string' &&
g.players
.find((p) => p.id === entry.player)
?.hand.filter(
(c) => c.id === entry.card && c.effect === 'truthtrance',
).length === 1,
),
'The saved shipment question must retain each physical Truthtrance in its holder’s hand.',
);
parseQuestion(g, window.queue[0].player, window.question);
}
/** A fact answer never returns which disjunct matched or any underlying private cards. */
export function truthFactAnswer(
p: Pick<Player, 'hand' | 'traitors' | 'traitorChoices' | 'spice'>,
fact: TruthFact,
): TruthAnswer {
if (fact.kind === 'handCount')
return cardCountFactMatches(p.hand, fact) ? 'yes' : 'no';
if (fact.kind === 'hand')
return p.hand.some((c) => c.name === fact.name) ? 'yes' : 'no';
if (fact.kind === 'traitor') {
if (p.traitorChoices.length) return 'unknown';
return p.traitors.includes(fact.leader) ? 'yes' : 'no';
}
if (fact.kind === 'spice') {
// A current fact reports personal custody, not transaction-specific spending power or a future promise.
const matches =
fact.compare === 'eq'
? p.spice === fact.value
: fact.compare === 'gte'
? p.spice >= fact.value
: p.spice <= fact.value;
return matches ? 'yes' : 'no';
}
const answers = fact.terms.map((term) => truthFactAnswer(p, term));
if (fact.kind === 'and')
return answers.includes('no')
? 'no'
: answers.includes('unknown')
? 'unknown'
: 'yes';
return answers.includes('yes')
? 'yes'
: answers.includes('unknown')
? 'unknown'
: 'no';
}
export function truthQuestionText(
q: TruthQuestion,
leaderName: (id: string) => string,
): string {
if (q.kind === 'freeform') return q.text;
if (q.kind === 'shipment')
return `Will you ship at least ${q.minimum} physical forces from your reserves to ${territory(q.territory).name} this turn?`;
if (q.kind === 'battlePlan')
return `In this battle in ${territory(q.territory).name}, will it be true that ${planClaimText(q.claim, leaderName)}?`;
const clause = (f: TruthFact): string => {
if (f.kind === 'handCount') return cardCountFactText(f);
if (f.kind === 'hand') return `you hold ${f.name}`;
if (f.kind === 'traitor') return `${leaderName(f.leader)} is your traitor`;
if (f.kind === 'spice')
return `you currently hold ${f.compare === 'eq' ? 'exactly' : f.compare === 'gte' ? 'at least' : 'at most'} ${f.value} spice`;
return `(${f.terms.map(clause).join(f.kind === 'and' ? ' AND ' : ' OR ')})`;
};
return `Is it true that ${clause(q.fact)}?`;
}
/** The interrupt overlays existing state. No battle/auction/response objects are moved or reconstructed. */
export function resolveTruthAction(
g: Game,
p: Player,
a: Action,
effects: {
completeDefiniteAnswer: (g: Game) => void;
log: (g: Game, text: string) => void;
shipmentAnswers: (
g: Game,
p: Player,
claim: ShipmentClaim,
) => TruthAnswer[];
bindShipment: (
g: Game,
p: Player,
claim: ShipmentClaim,
answer: boolean,
asker: string,
) => void;
battleAnswers: (g: Game, p: Player, claim: PlanClaim) => TruthAnswer[];
bindBattle: (
g: Game,
p: Player,
claim: PlanClaim,
answer: boolean,
asker: string,
) => void;
},
): boolean {
const isPlay =
a.type === 'card' &&
!a.mode &&
p.hand.some((c) => c.id === a.card && c.effect === 'truthtrance');
if (!g.truthtrance && !isPlay && !a.type.startsWith('truth')) return false;
check(
g.status === 'playing' || g.status === 'setup',
'Truthtrance requires a started game.',
);
if (isPlay) {
check(
!g.truthtrance || g.truthtrance.stage === 'priority',
'Answer the current Truthtrance before playing another card.',
);
g.truthtrance ??= {
stage: 'priority',
queue: [],
passed: [],
question: null,
};
const w = g.truthtrance;
check(
!w.passed.includes(p.id),
'You already declared or passed in this Truthtrance priority window.',
);
const extra = a.cards ?? [];
check(
Array.isArray(extra) && extra.length <= p.hand.length,
'Choose your additional Truthtrance cards.',
);
const selected: unknown[] = [a.card, ...extra];
check(
new Set(selected).size === selected.length &&
selected.every(
(id) =>
typeof id === 'string' &&
p.hand.some((c) => c.id === id && c.effect === 'truthtrance'),
),
'Each declared Truthtrance must be a different card in your hand.',
);
for (const card of selected)
w.queue.push({ player: p.id, card: card as string });
w.passed.push(p.id);
effects.log(
g,
`${p.name} declared Truthtrance. The table checks storm-order priority before a question is asked.`,
);
} else {
const w = g.truthtrance;
check(w, 'There is no pending Truthtrance.');
if (w.stage === 'priority') {
check(
a.type === 'truthPass' && !w.passed.includes(p.id),
'Declare Truthtrance or pass its priority window first.',
);
w.passed.push(p.id);
} else {
const current = w.queue[0];
check(current, 'No Truthtrance is awaiting resolution.');
if (a.type === 'truthAsk') {
check(
(w.stage === 'ask' || w.stage === 'unknown') &&
p.id === current.player,
'Waiting for the Truthtrance holder to ask a question.',
);
w.question = parseQuestion(g, p.id, a.question);
w.stage = 'answer';
const target = g.players.find(
(other) => other.id === w.question!.target,
)!;
effects.log(
g,
`${p.name} asks ${target.name}: ${truthQuestionText(w.question, (id) => (id === CHEAP_HERO_TRAITOR ? 'Cheap Hero / Heroine' : battleLeaderIdentities(g).find((leader) => leader.id === id)!.name))}`,
);
} else if (a.type === 'truthSave') {
check(
w.stage === 'unknown' && p.id === current.player,
'Truthtrance can be saved after an answer cannot be known.',
);
effects.log(g, `${p.name} saved Truthtrance for later.`);
nextQuestion(g);
} else {
check(
a.type === 'truthAnswer' &&
w.stage === 'answer' &&
w.question?.target === p.id,
'Waiting for the questioned player to answer Truthtrance.',
);
const q = w.question;
check(
a.answer === 'yes' || a.answer === 'no' || a.answer === 'unknown',
'Answer Yes, No, or I don’t know.',
);
if (q.kind === 'fact')
check(
a.answer === truthFactAnswer(p, q.fact),
'Answer this fact question truthfully.',
);
if (q.kind === 'shipment') {
check(
effects.shipmentAnswers(g, p, q).includes(a.answer),
'Choose an answer consistent with your available shipment and earlier promises.',
);
if (a.answer !== 'unknown')
effects.bindShipment(g, p, q, a.answer === 'yes', current.player);
}
if (q.kind === 'battlePlan') {
check(
effects.battleAnswers(g, p, q.claim).includes(a.answer),
'Choose an answer consistent with your legal plans and previous commitments.',
);
if (a.answer !== 'unknown')
effects.bindBattle(
g,
p,
q.claim,
a.answer === 'yes',
current.player,
);
}
// Freeform semantics cannot be certified by a deterministic engine. AI does not invent an answer.
if (q.kind === 'freeform' && p.bot)
check(
a.answer === 'unknown',
'AI cannot yet interpret freeform questions; ask a structured fact question.',
);
(g.truthHistory ??= []).push({
turn: g.turn,
phase: g.phase,
asker: current.player,
question: q,
answer: a.answer,
});
effects.log(
g,
`${p.name} answers Truthtrance: ${a.answer === 'unknown' ? 'I don’t know' : a.answer === 'yes' ? 'Yes' : 'No'}.`,
);
if (a.answer === 'unknown') w.stage = 'unknown';
else effects.completeDefiniteAnswer(g);
}
}
}
if (
g.truthtrance?.stage === 'priority' &&
g.truthtrance.passed.length === g.players.length
) {
const order = [
...g.order,
...g.players
.map((other) => other.id)
.filter((id) => !g.order.includes(id)),
];
g.truthtrance.queue.sort(
(a, b) => order.indexOf(a.player) - order.indexOf(b.player),
);
g.truthtrance.stage = 'ask';
}
return true;
}
function nextQuestion(g: Game) {
const w = g.truthtrance!;
w.queue.shift();
if (!w.queue.length) g.truthtrance = null;
else {
w.stage = 'ask';
w.question = null;
}
}