airship-phaser/tests/progression.test.mjs

import test from 'node:test';
import assert from 'node:assert/strict';
import {
  bestAffordableMarketUpgrade,
  buyAndInstallModule,
  collectSalvage,
  createStarterProgression,
  deriveShipStats,
  describeInventoryEntry,
  installInventoryModule,
  installModule,
  marketForPort,
  salvageForPirate,
  scrapInventoryModule,
  upgradePathForSlot,
} from '../src/progression/ship-loadout.js';

test('starter loadout preserves current ship combat and handling values', () => {
  const progression = createStarterProgression();
  const stats = deriveShipStats(progression.loadout);
  assert.equal(stats.maxHull, 100);
  assert.equal(stats.maxSpeed, 180);
  assert.equal(stats.turnRate, 76);
  assert.equal(stats.reloadMs, 850);
  assert.equal(stats.cannonDamage, 16);
  assert.equal(stats.cargoCapacity, 4);
});

test('engine upgrades advance one tier at a time', () => {
  const starter = { ...createStarterProgression(), credits: 10000 };
  const mk1 = buyAndInstallModule(starter, 'tuned-propellers');
  assert.equal(mk1.purchased, true);
  assert.equal(mk1.loadout.engine, 'tuned-propellers');

  const skip = buyAndInstallModule(starter, 'storm-turbines');
  assert.equal(skip.purchased, false);
  assert.equal(skip.reason, 'tier-locked');

  const mk2 = buyAndInstallModule(mk1, 'corsair-overdrive');
  assert.equal(mk2.purchased, true);
  assert.equal(mk2.loadout.engine, 'corsair-overdrive');
});

test('upgrade path exposes current and next tier with price and effect', () => {
  const starter = createStarterProgression();
  const stock = marketForPort({ type: 'trade' });
  const path = upgradePathForSlot(starter.loadout, 'engine', stock);
  assert.equal(path.current.tierLabel, 'Stock');
  assert.equal(path.next.tierLabel, 'Mk I');
  assert.equal(path.next.price, 800);
  assert.match(path.next.effectSummary, /speed/);
  assert.equal(path.next.stocked, true);
});

test('installed modules derive meaningful ship stat changes', () => {
  const progression = installModule(createStarterProgression(), 'corsair-overdrive');
  const stats = deriveShipStats(progression.loadout);
  assert.equal(stats.maxSpeed, 218);
  assert.equal(stats.acceleration, 112);
  assert.equal(stats.turnRate, 74);
});

test('port purchase deducts credits and installs the module', () => {
  const starter = createStarterProgression();
  const result = buyAndInstallModule(starter, 'tuned-propellers');
  assert.equal(result.purchased, false);

  const funded = { ...starter, credits: 1000 };
  const fundedResult = buyAndInstallModule(funded, 'tuned-propellers');
  assert.equal(fundedResult.purchased, true);
  assert.equal(fundedResult.credits, funded.credits - 800);
  assert.equal(fundedResult.loadout.engine, 'tuned-propellers');
});

test('pirate salvage includes deterministic field repair and collectible module condition', () => {
  const salvageA = salvageForPirate({ seed: 'WORLD', classKey: 'captain', wave: 4, sequence: 2 });
  const salvageB = salvageForPirate({ seed: 'WORLD', classKey: 'captain', wave: 4, sequence: 2 });
  assert.deepEqual(salvageA, salvageB);
  assert.ok(salvageA.repair > 0);

  const starter = createStarterProgression();
  const collected = collectSalvage(starter, salvageA);
  assert.ok(collected.credits >= starter.credits);
  assert.ok(collected.scrap >= starter.scrap);

  if (salvageA.moduleId) {
    const details = describeInventoryEntry(collected.inventory[0]);
    assert.ok(details);
    assert.ok(details.conditionPercent >= 28);
    assert.ok(details.scrapValue >= 1);
  }
});

test('recovered modules can be converted into scrap', () => {
  const starter = createStarterProgression();
  const collected = collectSalvage(starter, {
    moduleId: 'reinforced-rudder',
    condition: 0.5,
    credits: 0,
    scrap: 0,
    repair: 6,
  });
  const result = scrapInventoryModule(collected, 0);
  assert.equal(result.scrapped, true);
  assert.equal(result.inventory.length, 0);
  assert.ok(result.scrap > collected.scrap);
});

test('market selects only a valid next-tier affordable upgrade', () => {
  const starter = createStarterProgression();
  const upgrade = bestAffordableMarketUpgrade(starter, { type: 'military' });
  assert.ok(upgrade);
  assert.ok(upgrade.price <= starter.credits);
  if (Number.isInteger(upgrade.tier)) assert.equal(upgrade.tier, 1);
});

test('rudder is stocked at every port type so its upgrade path remains actionable', () => {
  const portTypes = ['industrial', 'military', 'fuel', 'trade'];
  for (const type of portTypes) {
    const stock = marketForPort({ type });
    assert.ok(stock.some(({ id }) => id === 'reinforced-rudder'));
    assert.ok(stock.some(({ id }) => id === 'balanced-rudder'));
  }
});

test('rudder tier improves handling', () => {
  const starter = { ...createStarterProgression(), credits: 650 };
  const result = buyAndInstallModule(starter, 'reinforced-rudder');
  const stats = deriveShipStats(result.loadout);
  assert.equal(result.purchased, true);
  assert.equal(result.credits, 250);
  assert.equal(stats.turnRate, 88);
});


test('salvaged module condition scales installed effectiveness', () => {
  const starter = createStarterProgression();
  const salvaged = {
    ...starter,
    inventory: [{ moduleId: 'reinforced-rudder', condition: 0.5, source: 'salvage' }],
  };
  const installed = installInventoryModule(salvaged, 0);
  const stats = deriveShipStats(installed.loadout, installed.installedConditions);
  assert.equal(installed.installedCondition, 0.5);
  assert.ok(stats.turnRate > 76);
  assert.ok(stats.turnRate < 88);
});

test('installing a selected salvage entry removes that exact inventory item', () => {
  const starter = createStarterProgression();
  const progression = {
    ...starter,
    inventory: [
      { moduleId: 'reinforced-rudder', condition: 0.4, source: 'salvage' },
      { moduleId: 'tuned-propellers', condition: 0.9, source: 'salvage' },
    ],
  };
  const installed = installInventoryModule(progression, 1);
  assert.equal(installed.loadout.engine, 'tuned-propellers');
  assert.equal(installed.inventory.length, 1);
  assert.equal(installed.inventory[0].moduleId, 'reinforced-rudder');
});