import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import { afterEach, describe, expect, it } from 'vitest';
import { loadEnv } from '../src/env.js';

const loadedKey = 'OPENCODE_PROXY_TEST_ENV_LOADED';
const existingKey = 'OPENCODE_PROXY_TEST_ENV_EXISTING';

afterEach(() => {
  delete process.env[loadedKey];
  delete process.env[existingKey];
});

describe('.env loading', () => {
  it('loads values without overriding the process environment', async () => {
    const directory = await fs.mkdtemp(path.join(os.tmpdir(), 'opencode-proxy-env-'));
    const envPath = path.join(directory, '.env');
    await fs.writeFile(envPath, `${loadedKey}=from-file\n${existingKey}=from-file\n`);
    process.env[existingKey] = 'from-process';

    try {
      loadEnv(envPath);
      expect(process.env[loadedKey]).toBe('from-file');
      expect(process.env[existingKey]).toBe('from-process');
    } finally {
      await fs.rm(directory, { recursive: true, force: true });
    }
  });
});