'use strict';

/**
 * Integration tests – common controller (controllers/common.js)
 *
 * Covers: getCountries_get
 */

const { connectDB, disconnectDB, clearCollection } = require('./jest.setup');
const { mockReq, mockRes } = require('./mock_data');

let Country;

beforeAll(async () => {
  await connectDB();
  Country = require('../../model/country');
});

afterAll(async () => {
  await disconnectDB();
});

const commonCtl = require('../../controllers/common');

describe('common controller – data methods', () => {
  beforeAll(async () => {
    await clearCollection(Country);
    await Country.create([
      { code: 'US', name: 'United States' },
      { code: 'CA', name: 'Canada' },
    ]);
  });

  afterAll(async () => {
    await clearCollection(Country);
  });

  describe('getCountries_get', () => {
    it('returns an array of countries with code and name', async () => {
      const req = mockReq();
      const res = mockRes();

      await commonCtl.getCountries_get(req, res);

      expect(res.json).toHaveBeenCalled();
      expect(Array.isArray(res._data)).toBe(true);
      expect(res._data.length).toBeGreaterThanOrEqual(2);
      const us = res._data.find(c => c.code === 'US');
      expect(us).toBeDefined();
      expect(us.name).toBe('United States');
      // _id should be excluded per the controller projection
      expect(us._id).toBeUndefined();
    });

    it('returns an empty array when no countries exist', async () => {
      await clearCollection(Country);

      const req = mockReq();
      const res = mockRes();

      await commonCtl.getCountries_get(req, res);

      expect(res.json).toHaveBeenCalled();
      expect(res._data).toEqual([]);
    });
  });
});