/**
 * Config Route Tests
 *
 * Tests DashCaddy configuration endpoints (get, save, delete)
 */

const request = require('supertest');
const fs = require('fs');
const path = require('path');
const os = require('os');

const testServicesFile = path.join(os.tmpdir(), `config-services-${Date.now()}.json`);
const testConfigFile = path.join(os.tmpdir(), `config-config-${Date.now()}.json`);

process.env.SERVICES_FILE = testServicesFile;
process.env.CONFIG_FILE = testConfigFile;
process.env.ENABLE_HEALTH_CHECKER = 'false';
process.env.NODE_ENV = 'test';

fs.writeFileSync(testServicesFile, '[]', 'utf8');
fs.writeFileSync(testConfigFile, '{}', 'utf8');

const app = require('../server');

describe('Config Routes', () => {
  afterAll(() => {
    try { fs.unlinkSync(testServicesFile); } catch (e) { /* ignore */ }
    try { fs.unlinkSync(testConfigFile); } catch (e) { /* ignore */ }
  });

  // Reset config file before each test to avoid leaking state
  beforeEach(() => {
    fs.writeFileSync(testConfigFile, '{}', 'utf8');
  });

  describe('GET /api/config', () => {
    test('should return 200 with config object', async () => {
      const res = await request(app).get('/api/config');

      expect(res.statusCode).toBe(200);
      expect(typeof res.body).toBe('object');
    });
  });

  describe('POST /api/config', () => {
    test('should return 200 with success:true for valid config', async () => {
      const validConfig = {
        tld: 'sami',
        theme: 'dark',
        timezone: 'America/New_York'
      };

      const res = await request(app)
        .post('/api/config')
        .send(validConfig);

      expect(res.statusCode).toBe(200);
      expect(res.body.success).toBe(true);

      // Verify config was persisted
      const savedConfig = JSON.parse(fs.readFileSync(testConfigFile, 'utf8'));
      expect(savedConfig.tld).toBe('sami');
      expect(savedConfig.theme).toBe('dark');
    });

    test('should return 400 for invalid config body', async () => {
      // Send a non-object body (string) which fails the typeof check
      const res = await request(app)
        .post('/api/config')
        .set('Content-Type', 'application/json')
        .send('"not an object"');

      expect(res.statusCode).toBe(400);
    });

    test('should return 400 for config with invalid field values', async () => {
      const invalidConfig = {
        tld: 123,  // tld must be a string
        dns: 'not-an-object'  // dns must be an object
      };

      const res = await request(app)
        .post('/api/config')
        .send(invalidConfig);

      expect(res.statusCode).toBe(400);
    });
  });

  describe('DELETE /api/config', () => {
    test('should return 200 and reset config', async () => {
      // First save a config
      await request(app)
        .post('/api/config')
        .send({ tld: 'sami', theme: 'dark' });

      // Then delete it
      const res = await request(app).delete('/api/config');

      expect(res.statusCode).toBe(200);
      expect(res.body.success).toBe(true);

      // Config file should no longer exist
      expect(fs.existsSync(testConfigFile)).toBe(false);
    });

    test('should return 200 even when config does not exist', async () => {
      // Remove the config file first
      try { fs.unlinkSync(testConfigFile); } catch (e) { /* ignore */ }

      const res = await request(app).delete('/api/config');

      expect(res.statusCode).toBe(200);
      expect(res.body.success).toBe(true);
    });
  });
});