import { describe, it, beforeEach, afterEach } from 'node:test';
import assert from 'node:assert/strict';
import { getLLMConfig, getOpenCodeHttpsAgent } from './config.js';

const ENV_KEYS = [
  'OPENCODE_BASE_URL', 'OPENCODE_MODEL', 'OPENCODE_PROVIDER',
];

let saved = {};
beforeEach(() => {
  saved = {};
  for (const k of ENV_KEYS) { saved[k] = process.env[k]; delete process.env[k]; }
});
afterEach(() => {
  for (const k of ENV_KEYS) {
    if (saved[k] === undefined) delete process.env[k];
    else process.env[k] = saved[k];
  }
});

describe('getLLMConfig', () => {
  it('returns null provider when no env vars set', () => {
    const cfg = getLLMConfig();
    assert.equal(cfg.provider, null);
    assert.deepEqual(cfg.apiKeys, []);
  });

  it('detects opencode server with defaults', () => {
    process.env.OPENCODE_BASE_URL = 'http://opencode.local:4096';
    const cfg = getLLMConfig();
    assert.equal(cfg.provider, 'opencode');
    assert.deepEqual(cfg.apiKeys, ['opencode']);
    assert.equal(cfg.baseURL, 'http://opencode.local:4096');
    assert.equal(cfg.model, 'gemini-2.5-flash');
  });

  it('detects opencode server with custom model', () => {
    process.env.OPENCODE_BASE_URL = 'http://opencode.local:4096';
    process.env.OPENCODE_MODEL = 'google/gemini-2.5-pro';
    const cfg = getLLMConfig();
    assert.equal(cfg.provider, 'opencode');
    assert.equal(cfg.baseURL, 'http://opencode.local:4096');
    assert.equal(cfg.model, 'google/gemini-2.5-pro');
  });

  it('uses an insecure HTTPS agent for OpenCode', () => {
    const agent = getOpenCodeHttpsAgent();
    assert.equal(agent.options.rejectUnauthorized, false);
  });

});