airship-phaser/tests/dock-economy.test.mjs

import test from 'node:test';
import assert from 'node:assert/strict';

import { generateWorld } from '../src/world/world-generator.js';
import { createStarterProgression, deriveShipStats } from '../src/progression/ship-loadout.js';
import {
  acceptMission,
  bestTradeDestination,
  buyTradeGood,
  completeMission,
  marketAtPort,
  missionOffersAtPort,
  missionStatus,
  payForHullRepair,
  recordRouteTradeEvent,
  sellTradeGood,
  tradeCargoUnits,
} from '../src/progression/dock-economy.js';

test('port markets are deterministic and expose buy/sell prices', () => {
  const world = generateWorld({ seed: 'DOCK-MARKET' });
  const port = world.ports[0];
  const a = marketAtPort(world, port);
  const b = marketAtPort(world, port);
  assert.deepEqual(a, b);
  assert.ok(a.length >= 4);
  assert.ok(a.every((item) => item.buyPrice > item.sellPrice));
});

test('trade cargo respects capacity and selling returns coin', () => {
  const world = generateWorld({ seed: 'DOCK-TRADE' });
  const market = marketAtPort(world, world.ports[0]);
  const item = market[0];
  const starter = { ...createStarterProgression(), credits: 2000 };
  const stats = deriveShipStats(starter.loadout);
  const bought = buyTradeGood(starter, item, stats);
  assert.equal(bought.traded, true);
  assert.equal(tradeCargoUnits(bought), 1);
  assert.ok(bought.credits < starter.credits);

  const sold = sellTradeGood(bought, item);
  assert.equal(sold.traded, true);
  assert.equal(tradeCargoUnits(sold), 0);
  assert.ok(sold.credits > bought.credits);
});

test('delivery missions follow generated trade routes and complete at destination', () => {
  const world = generateWorld({ seed: 'DOCK-MISSIONS' });
  const origin = world.ports[0];
  const offers = missionOffersAtPort(world, origin, 0);
  const delivery = offers.find(({ type }) => type === 'delivery');
  assert.ok(delivery);
  assert.ok(world.tradeRoutes.some((route) =>
    (route.fromPortId === origin.id && route.toPortId === delivery.targetPortId)
    || (route.toPortId === origin.id && route.fromPortId === delivery.targetPortId)
  ));

  const starter = createStarterProgression();
  const stats = deriveShipStats(starter.loadout);
  const accepted = acceptMission(starter, delivery, stats, 0);
  assert.equal(accepted.missionAccepted, true);
  assert.equal(missionStatus(accepted, { portId: origin.id, defeated: 0 }).ready, false);

  const completed = completeMission(accepted, {
    portId: delivery.targetPortId,
    defeated: 0,
  });
  assert.equal(completed.missionCompleted, true);
  assert.equal(completed.activeMission, null);
  assert.equal(completed.credits, starter.credits + delivery.reward);
});

test('bounty missions advance from actual pirate kill count', () => {
  const world = generateWorld({ seed: 'DOCK-BOUNTY' });
  const offers = missionOffersAtPort(world, world.ports[0], 5);
  const bounty = offers.find(({ type }) => type === 'bounty');
  const starter = createStarterProgression();
  const stats = deriveShipStats(starter.loadout);
  const accepted = acceptMission(starter, bounty, stats, 5);
  const pending = missionStatus(accepted, {
    portId: world.ports[0].id,
    defeated: 5 + bounty.targetKills - 1,
  });
  assert.equal(pending.ready, false);
  const ready = missionStatus(accepted, {
    portId: world.ports[0].id,
    defeated: 5 + bounty.targetKills,
  });
  assert.equal(ready.ready, true);
});


test('mission boards rotate after completed contracts', () => {
  const world = generateWorld({ seed: 'DOCK-ROTATE' });
  const port = world.ports[0];
  const first = missionOffersAtPort(world, port, 0, 0);
  const next = missionOffersAtPort(world, port, 0, 1);
  assert.notDeepEqual(first.map(({ id }) => id), next.map(({ id }) => id));
});

test('merchant losses create shortages and player piracy adds wanted level', () => {
  const world = generateWorld({ seed: 'DOCK-SHORTAGE' });
  const route = world.tradeRoutes[0];
  const destinationPortId = route.toPortId;
  const starter = createStarterProgression();
  const afterLoss = recordRouteTradeEvent(
    starter,
    world,
    route,
    destinationPortId,
    { kind: 'loss', playerCaused: true },
  );
  assert.equal(afterLoss.economy.wanted, 1);
  assert.ok(afterLoss.economy.reputation < 0);
  assert.ok(Object.values(afterLoss.economy.shortages).some((value) => value > 0));

  const afterDelivery = recordRouteTradeEvent(
    afterLoss,
    world,
    route,
    destinationPortId,
    { kind: 'delivery' },
  );
  const before = Math.max(...Object.values(afterLoss.economy.shortages));
  const after = Math.max(...Object.values(afterDelivery.economy.shortages));
  assert.ok(after < before);
});

test('trade hints identify a best destination and real margin', () => {
  const world = generateWorld({ seed: 'DOCK-HINTS' });
  const port = world.ports[0];
  const item = marketAtPort(world, port)[0];
  const opportunity = bestTradeDestination(world, port, item.goodId);
  assert.ok(opportunity);
  assert.ok(Number.isFinite(opportunity.margin));
  assert.notEqual(opportunity.portId, port.id);
});

test('dock repair restores hull when the player can afford it', () => {
  const world = generateWorld({ seed: 'DOCK-REPAIR' });
  const starter = { ...createStarterProgression(), credits: 1000 };
  const result = payForHullRepair(starter, 70, 100, world.ports[0]);
  assert.equal(result.repaired, true);
  assert.equal(result.hull, 100);
  assert.ok(result.progression.credits < starter.credits);
});