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

import { loadApiEnv } from './app-config.service';

/**
 * Regression for the Test-stage boot crash after #80: compose passes
 * optional variables as empty strings (`SETUP_DEFAULT_LOCALE: ${…:-}`),
 * and a raw parse of process.env fails on enum fields. loadApiEnv must
 * treat them as unset — in main.ts exactly like in AppConfig.
 */
describe('loadApiEnv', () => {
  const touched = [
    'SETUP_DEFAULT_LOCALE',
    'SETUP_REGISTRATION_MODE',
    'SMTP_HOST',
    'SMTP_PORT',
    'SECRETS_FILE',
    'DATABASE_URL',
  ] as const;
  const saved = Object.fromEntries(touched.map((key) => [key, process.env[key]]));

  afterEach(() => {
    for (const key of touched) {
      if (saved[key] === undefined) delete process.env[key];
      else process.env[key] = saved[key];
    }
  });

  it('treats compose-passed empty strings as unset', () => {
    process.env.DATABASE_URL = 'postgresql://user:pass@localhost:5432/db';
    process.env.SETUP_DEFAULT_LOCALE = '';
    process.env.SETUP_REGISTRATION_MODE = '';
    process.env.SMTP_HOST = '';
    process.env.SMTP_PORT = '';
    process.env.SECRETS_FILE = '';

    const env = loadApiEnv();
    expect(env.SETUP_DEFAULT_LOCALE).toBeUndefined();
    expect(env.SETUP_REGISTRATION_MODE).toBeUndefined();
    expect(env.SMTP_HOST).toBe('localhost'); // schema default, not ""
    expect(env.SMTP_PORT).toBe(1025);
    expect(env.SECRETS_FILE).toBe('./data/secrets.env');
  });
});