import assert from 'node:assert/strict';
import test from 'node:test';
import { applyAction, viewGame, type Game } from '../game/engine';
import { botActions } from '../game/bots';
import { DIFFICULTIES } from '../game/bot-profiles';
import { knowledgeGame, knownForecastGame, knowledgePhysical, rejectKnowledge } from './truthtrance-knowledge-fixture';

/** Native setup and prediction; the fixture stages Truthtrance acquisition. */
function ask(initial: Game, target: string, text: string, scope: 'fact' | 'currentTurn' = 'fact'): Game {
  const asker = initial.players[0];
  const card = asker.hand.find(candidate => candidate.effect === 'truthtrance'); assert.ok(card);
  let game = applyAction(initial, asker.id, { type: 'card', card: card.id });
  while (game.truthtrance?.stage === 'priority') {
    const player = game.players.find(candidate => !game.truthtrance!.passed.includes(candidate.id)); assert.ok(player);
    game = applyAction(game, player.id, { type: 'truthPass' });
  }
  return applyAction(game, asker.id, { type: 'truthAsk', question: { kind: 'freeform', target, scope, text } });
}
function question(game: Game) {
  const value = game.truthtrance?.question;
  assert.equal(value?.kind, 'freeform');
  if (value?.kind !== 'freeform') throw Error('Expected a freeform question');
  return value;
}
function assertPrivateAndBots(game: Game, target: string, answer: 'yes' | 'no' | 'unknown') {
  assert.equal(question(game).interpreted?.version, 6);
  assert.equal(viewGame(game, target).truthAnswer, answer);
  for (const observer of game.players.filter(player => player.id !== target))
    assert.equal(viewGame(game, observer.id).truthAnswer, null);
  for (const difficulty of DIFFICULTIES) {
    const view = viewGame(game, target); view.players.find(player => player.id === target)!.bot = difficulty;
    assert.deepEqual(botActions(view), [{ type: 'truthAnswer', answer }]);
  }
  for (const incorrect of (['yes', 'no', 'unknown'] as const).filter(value => value !== answer))
    rejectKnowledge(game, target, { type: 'truthAnswer', answer: incorrect });
}

void test('V6 prediction questions check private current knowledge and all bot answers', () => {
  for (const [text, answer] of [['Did you predict Guild?', 'yes'], ['Did you predict Harkonnen?', 'no']] as const) {
    const initial = knowledgeGame(), physical = knowledgePhysical(initial);
    const game = ask(initial, 'b', text); assertPrivateAndBots(game, 'b', answer);
    assert.equal('prediction' in viewGame(game, 'a').players.find(player => player.id === 'b')!, false);
    const restored = JSON.parse(JSON.stringify(game)) as Game;
    const done = applyAction(restored, 'b', { type: 'truthAnswer', answer });
    assert.equal(done.truthHistory!.at(-1)!.answer, answer);
    assert.deepEqual(knowledgePhysical(done), physical);
  }
});

void test('V6 unknown knowledge stays private and retains Truthtrance for another question', () => {
  const initial = knowledgeGame(), before = knowledgePhysical(initial);
  const game = ask(initial, 'o', 'Did you predict Harkonnen?');
  assertPrivateAndBots(game, 'o', 'unknown');
  const done = applyAction(game, 'o', { type: 'truthAnswer', answer: 'unknown' });
  assert.equal(done.truthtrance?.stage, 'unknown');
  assert.deepEqual(knowledgePhysical(done), before);
});

void test('V6 uses the native Fremen storm forecast without revealing it to other seats', () => {
  const initial = knownForecastGame(); assert.ok(initial.stormCard);
  const game = ask(initial, 'f', `Is your storm forecast exactly ${initial.stormCard}?`);
  assertPrivateAndBots(game, 'f', 'yes');
  for (const id of ['a', 'b', 'o']) assert.equal(viewGame(game, id).stormForecast, null);
  const done = applyAction(game, 'f', { type: 'truthAnswer', answer: 'yes' });
  assert.equal(done.stormCard, initial.stormCard);
});

void test('V6 reads the current Atreides Spice forecast only for its entitled owner', () => {
  const initial = knowledgeGame();
  // Stage the Movement forecast and choose an existing undealt worm without
  // changing the physical Spice deck; acquisition itself is not claimed.
  initial.phase = 5; initial.active = 'o'; initial.spicePeekKnown = true;
  const worm = initial.spiceDeck.findIndex(card => 'worm' in card && card.worm);
  assert.ok(worm >= 0);
  [initial.spiceDeck[0], initial.spiceDeck[worm]] = [initial.spiceDeck[worm], initial.spiceDeck[0]];
  const game = ask(initial, 'o', 'Is the next Spice Blow a sandworm?');
  assertPrivateAndBots(game, 'o', 'yes');
  const done = applyAction(game, 'o', { type: 'truthAnswer', answer: 'yes' });
  assert.deepEqual(done.spiceDeck, initial.spiceDeck);
});

void test('V6 checks physical reserve forces using the existing force-count fact', () => {
  const initial = knowledgeGame(), target = initial.players.find(player => player.id === 'b')!;
  assert.ok(target.reserves >= 3);
  const game = ask(initial, 'b', 'Do you have at least 3 forces in your reserves?');
  assertPrivateAndBots(game, 'b', 'yes');
  const done = applyAction(game, 'b', { type: 'truthAnswer', answer: 'yes' });
  assert.equal(done.players.find(player => player.id === 'b')!.reserves, target.reserves);
});

void test('older unstamped and current-turn questions keep their existing manual semantics', () => {
  const text = 'Did you predict Harkonnen?';
  const future = ask(knowledgeGame(), 'b', text, 'currentTurn');
  assert.equal(question(future).interpreted, undefined);
  const old = ask(knowledgeGame(), 'b', text);
  delete question(old).interpreted;
  assert.equal(viewGame(old, 'b').truthAnswer, null);
  const done = applyAction(old, 'b', { type: 'truthAnswer', answer: 'yes' });
  assert.equal(done.truthHistory!.at(-1)!.answer, 'yes');
});

void test('a modified V6 receipt cannot change the interpreted fact', () => {
  const game = ask(knowledgeGame(), 'b', 'Did you predict Harkonnen?');
  const q = question(game); assert.equal(q.interpreted?.version, 6);
  if (!q.interpreted) throw Error('Expected a recognized receipt');
  q.interpreted.fact = { kind: 'prediction', field: 'faction', faction: 'guild' };
  assert.throws(() => viewGame(game, 'b'));
  assert.throws(() => applyAction(game, 'b', { type: 'truthAnswer', answer: 'yes' }));
});