import { describe, expect, it } from 'vitest';
import { buildRegionMap } from './map';
import { nationColor } from '../shared/protocol';
import type { GameState } from '../shared/types';

const state: GameState = {
  id: 'g',
  presetId: 'p',
  presetTitle: 'P',
  playerNationId: 'uk',
  turn: 1,
  date: '1939-09-01',
  nations: {
    uk: {
      id: 'uk',
      name: 'UK',
      type: 'major',
      stats: { military: 80, economy: 70, stability: 60, population: 50 },
      territory: ['GBR', 'IRL'],
      relations: {},
    },
    de: {
      id: 'de',
      name: 'DE',
      type: 'major',
      stats: { military: 90, economy: 70, stability: 70, population: 90 },
      territory: ['DEU'],
      relations: {},
    },
  },
  events: [],
};

describe('buildRegionMap', () => {
  it('maps each ISO_A3 region to its owner + that nation\'s stable color', () => {
    const m = buildRegionMap(state);
    expect(m.GBR).toEqual({ color: nationColor('uk'), owner: 'UK', ownerId: 'uk' });
    expect(m.IRL).toEqual({ color: nationColor('uk'), owner: 'UK', ownerId: 'uk' });
    expect(m.DEU).toEqual({ color: nationColor('de'), owner: 'DE', ownerId: 'de' });
    // a region nobody owns is simply absent
    expect(m.FRA).toBeUndefined();
  });
});

describe('nationColor', () => {
  it('is deterministic per id and distinct across different ids', () => {
    expect(nationColor('uk')).toBe(nationColor('uk'));
    expect(nationColor('uk')).not.toBe(nationColor('de'));
    // always a valid HSL string
    expect(nationColor('uk')).toMatch(/^hsl\(\d+ 58% 46%\)$/);
  });
});