import assert from 'node:assert/strict';
import test from 'node:test';
import {
  chooseDiscoveryStorm,
  discoveryStormSaphoModes,
  discoveryStormSignature,
  finishDiscoveryStorm,
  reorderDiscoveryStorm,
  validateDiscoveryStorm,
} from '../game/discovery-storm';
import {createTestingStationContestFixture} from './fixture-testing-station-contest';

// Real revealed station, original storm source and both occupants. The helper
// tests ordering only; physical Sapho ownership and disposal belong to engine.
const source = () => createTestingStationContestFixture().game;

void test('legacy station signature stays unchanged and offers only meaningful two-seat moves', () => {
  const game = source(), frame = game.ecologicalStorm!;
  const [first, second] = frame.queue!.order;
  assert.equal(frame.signature, JSON.stringify([frame.event, frame.turn, frame.owner,
    frame.token, frame.from, frame.base, frame.delta, frame.stage,
    frame.queue!.order, frame.queue!.choices]));
  assert.deepEqual(discoveryStormSaphoModes(game, frame, first), ['last']);
  assert.deepEqual(discoveryStormSaphoModes(game, frame, second), ['first']);
  assert.deepEqual(discoveryStormSaphoModes(game, frame, 'nonoccupant'), []);
});

for (const mode of ['first', 'last'] as const) void test(
  `Sapho ${mode} binds a fresh station event and preserves both cumulative choices`, () => {
    const game = source(), original = structuredClone(game.ecologicalStorm!);
    const holder = original.queue!.order[mode === 'first' ? 1 : 0];
    const frame = reorderDiscoveryStorm(game, original,
      {holder, event: original.event, mode, nextEvent: 'sapho-fresh-event'});
    assert.deepEqual(original, game.ecologicalStorm);
    assert.deepEqual(frame.queue!.order, [...original.queue!.order].reverse());
    assert.equal(frame.owner, frame.queue!.order[0]);
    assert.deepEqual(frame.sapho, {event: original.event, nextEvent: 'sapho-fresh-event',
      originalOrder: original.queue!.order, holder, mode});
    assert.deepEqual(discoveryStormSaphoModes(game, frame, holder), []);
    assert.throws(() => chooseDiscoveryStorm(game, frame, frame.owner, original.event, 0));
    let next = chooseDiscoveryStorm(game, frame, frame.owner, frame.event, 0);
    assert.equal(next.event, 'sapho-fresh-event:1');
    validateDiscoveryStorm(game, next);
    next = chooseDiscoveryStorm(game, next, next.owner, next.event, 0);
    assert.equal(next.stage, 'traversal');
    validateDiscoveryStorm(game, next);
    next = finishDiscoveryStorm(next);
    validateDiscoveryStorm(game, next);
    assert.deepEqual(next.sapho, frame.sapho);
    assert.deepEqual(next.queue!.choices.map(choice => choice.owner), frame.queue!.order);
  },
);

void test('stale, ineffective, replayed and tampered station reorder requests fail closed', () => {
  const game = source(), frame = game.ecologicalStorm!;
  const [first, second] = frame.queue!.order, before = structuredClone(frame);
  for (const input of [
    {holder: first, event: 'stale', mode: 'last' as const, nextEvent: 'fresh'},
    {holder: first, event: frame.event, mode: 'first' as const, nextEvent: 'fresh'},
    {holder: second, event: frame.event, mode: 'first' as const, nextEvent: frame.event},
    {holder: 'other', event: frame.event, mode: 'last' as const, nextEvent: 'fresh'},
  ]) assert.throws(() => reorderDiscoveryStorm(game, frame, input));
  assert.deepEqual(frame, before);
  const reordered = reorderDiscoveryStorm(game, frame,
    {holder: first, event: frame.event, mode: 'last', nextEvent: 'fresh'});
  assert.throws(() => reorderDiscoveryStorm(game, reordered,
    {holder: second, event: 'fresh', mode: 'last', nextEvent: 'again'}));
  const changed = structuredClone(reordered);
  changed.sapho!.originalOrder.reverse();
  changed.signature = discoveryStormSignature(changed);
  assert.throws(() => validateDiscoveryStorm(game, changed));
  const afterFirst = chooseDiscoveryStorm(game, frame, first, frame.event, 0);
  assert.deepEqual(discoveryStormSaphoModes(game, afterFirst, second), []);
});