Dune/tests/reinforcements-homeworld-choice.test.ts

import test from 'node:test';
import assert from 'node:assert/strict';
import { NativeReserveError, type NativeReserveSelections } from '../game/homeworld-native-reserves';
import { type HomeworldCustody, type HomeworldCustodyContext } from '../game/homeworld-custody';
import {
  quoteReinforcementsHomeworldCost as quote,
  reinforcementsHomeworldSources as sources,
} from '../game/reinforcements-homeworld';
import { ReinforcementsError } from '../game/reinforcements';
import { combatArmy } from '../game/combat-location';
import {
  assertReinforcementsHomeworldCustody,
  createReinforcementsHomeworldFixture,
  finishReinforcementsHomeworldBattle,
  reinforcementsHomeworldPlayer as player,
  reinforcementsHomeworldPool as pool,
  sealReinforcementsHomeworldPlan,
} from './fixture-reinforcements-homeworld';

const kaitain = 'homeworld:emperor';
const salusa = 'homeworld:emperor:salusa';
const ix = 'homeworld:ixians';
const units = (normal: number, elite = 0) => ({ normal, elite });

function fixture(): { context: HomeworldCustodyContext; custody: HomeworldCustody } {
  return {
    context: { advanced: true, players: [
      { id: 'e', faction: 'emperor', reserves: 10, eliteReserves: 3 },
      { id: 'i', faction: 'ixians', reserves: 10, eliteReserves: 2 },
    ] },
    custody: { salusa: units(3, 2), visitors: {
      [kaitain]: { i: units(2) },
      [ix]: { e: units(1, 1) },
    } },
  };
}

void test('Homeworld options and costs honor the selected typed fee and preserve normal-first defaults', () => {
  const { context, custody } = fixture();
  const before = structuredClone({ context, custody });
  const defaults = sources(context, custody, 'e');
  assert.deepEqual(defaults, sources(context, custody, 'e', 0));
  assert.equal(defaults.length, 4);
  const mixed = sources(context, custody, 'e', 2);
  assert.equal(mixed.length, 4);
  for (const allocation of mixed) {
    assert.equal(allocation[kaitain].normal + allocation[salusa].normal, 1);
    assert.equal(allocation[kaitain].elite + allocation[salusa].elite, 2);
    const result = quote(context, custody, 'e', allocation, 2);
    assert.deepEqual({ normal: result.normal, elite: result.elite, bonus: result.bonus },
      { normal: 1, elite: 2, bonus: 2 });
    assert.deepEqual(result.sources, allocation);
    assert.equal(result.native.players[0].reserves, 7);
    assert.equal(result.native.players[0].eliteReserves, 1);
  }
  assert.throws(() => quote(context, custody, 'e', undefined, 2), NativeReserveError);
  const defaultResult = quote(context, custody, 'e', defaults[0]);
  assert.deepEqual({ normal: defaultResult.normal, elite: defaultResult.elite }, { normal: 3, elite: 0 });
  assert.deepEqual({ context, custody }, before);
});

void test('single native Homeworld can automatically pay an explicit elite choice', () => {
  const { context, custody } = fixture();
  assert.deepEqual(sources(context, custody, 'i', 2), [{ [ix]: units(1, 2) }]);
  const result = quote(context, custody, 'i', undefined, 2);
  assert.deepEqual(result.sources, { [ix]: units(1, 2) });
  assert.deepEqual({ normal: result.normal, elite: result.elite, bonus: result.bonus },
    { normal: 1, elite: 2, bonus: 2 });
  assert.equal(result.native.players[1].eliteReserves, 0);
});

void test('selected types and explicit native allocations are both validated', () => {
  const { context, custody } = fixture();
  const before = structuredClone({ context, custody });
  for (const choice of [-1, 4, 1.5, NaN, Infinity]) {
    assert.throws(() => sources(context, custody, 'e', choice), ReinforcementsError);
    assert.throws(() => quote(context, custody, 'e', undefined, choice), ReinforcementsError);
  }
  for (const allocation of [
    { [kaitain]: units(3) }, // valid default fee, wrong for the chosen mix
    { [ix]: units(1, 2) }, // visitor forces cannot pay the fee
    { [kaitain]: units(1, 2) }, // Kaitain has only one elite
    { [kaitain]: units(1, 1) }, // does not sum to the chosen fee
    { [kaitain]: { normal: 1, elite: 2, extra: 0 } },
  ]) {
    assert.throws(() => quote(context, custody, 'e', allocation as unknown as NativeReserveSelections, 2), NativeReserveError);
  }
  assert.deepEqual({ context, custody }, before);
});

void test('Advanced Emperor seals and pays a mixed Homeworld fee from the selected Worlds', () => {
  const allocation = { [kaitain]: units(1), [salusa]: units(1, 1) };
  const f = createReinforcementsHomeworldFixture({ advanced: true, sources: allocation });
  const before = player(f.game, f.owner);
  assert.deepEqual(pool(f.game, f.owner, kaitain), units(10));
  assert.deepEqual(pool(f.game, f.owner, salusa), units(2, 1));
  assert.deepEqual(combatArmy(f.game, f.owner, f.location), units(3, 4));
  const action = { ...f.planActions[0].action, reinforcementsElite: 1 };
  let game = sealReinforcementsHomeworldPlan(f.game, { actor: f.owner, action });
  assert.deepEqual(game.homeworlds, f.game.homeworlds, 'Sealing does not pay the fee');
  assert.equal(player(game, f.owner).elites!.reserves, before.elites!.reserves);
  game = sealReinforcementsHomeworldPlan(JSON.parse(JSON.stringify(game)), f.planActions[1]);
  const done = finishReinforcementsHomeworldBattle(game);
  const after = player(done, f.owner);
  assert.equal(done.lastBattleContext!.winner, f.opponent);
  assert.deepEqual(pool(done, f.owner, kaitain), units(9));
  assert.deepEqual(pool(done, f.owner, salusa), units(1));
  assert.deepEqual(combatArmy(done, f.owner, f.location), units(0));
  assert.equal(after.reserves, before.reserves - 3);
  assert.equal(after.elites!.reserves, before.elites!.reserves - 1);
  assert.equal(after.tanks, before.tanks + 10, 'Three fee forces and seven defeated invaders');
  assert.equal(after.elites!.tanks, before.elites!.tanks + 5, 'One fee elite and four defeated elites');
  assert.equal(after.battleLosses, before.battleLosses + 10);
  assertReinforcementsHomeworldCustody(f.game);
  assertReinforcementsHomeworldCustody(done);
});