import { describe, it, expect, beforeEach } from 'vitest';

// Helper pour recharger le module avec de nouvelles variables d'env
async function loadConfig() {
  const modulePath = '../src/config';
  // Vitest supporte l'invalidation via import dynamique après resetModules
  const mod = await import(modulePath);
  return (mod.loadConfig as typeof import('../src/config').loadConfig)();
}

describe('config', () => {
  const envBackup = { ...process.env };

  beforeEach(async () => {
    process.env = { ...envBackup };
    delete process.env.PORT;
    delete process.env.API_KEY;
    delete process.env.DATABASE_PATH;
    delete process.env.RELAY_URLS;
    delete process.env.AUTO_RESTART;
    delete process.env.MAX_RESTARTS;
    delete process.env.LOG_LEVEL;
    // @ts-ignore: vitest injecte resetModules via globalThis
    if (typeof vi !== 'undefined') vi.resetModules();
  });

  it('charge les valeurs par défaut', async () => {
    const cfg = await loadConfig();
    expect(cfg.port).toBe(9090);
    expect(cfg.apiKey).toBe('your-api-key-change-this');
    expect(cfg.databasePath).toBe('./data/server.db');
    expect(cfg.relayUrls).toEqual(['ws://localhost:8090']);
    expect(cfg.autoRestart).toBe(false);
    expect(cfg.maxRestarts).toBe(10);
    expect(cfg.logLevel).toBe('info');
  });

  it('lit les variables d’environnement', async () => {
    process.env.PORT = '1234';
    process.env.API_KEY = 'k';
    process.env.DATABASE_PATH = '/x.db';
    process.env.RELAY_URLS = 'ws://a:1,ws://b:2';
    process.env.AUTO_RESTART = 'true';
    process.env.MAX_RESTARTS = '7';
    process.env.LOG_LEVEL = 'debug';
    // @ts-ignore
    if (typeof vi !== 'undefined') vi.resetModules();
    const cfg = await loadConfig();
    expect(cfg.port).toBe(1234);
    expect(cfg.apiKey).toBe('k');
    expect(cfg.databasePath).toBe('/x.db');
    expect(cfg.relayUrls).toEqual(['ws://a:1', 'ws://b:2']);
    expect(cfg.autoRestart).toBe(true);
    expect(cfg.maxRestarts).toBe(7);
    expect(cfg.logLevel).toBe('debug');
  });
});