const request = require('supertest');
const express = require('express');

// Mock CouchDB service before importing routes
jest.mock('../../services/couchdbService', () => ({
  initialize: jest.fn().mockResolvedValue(true),
  create: jest.fn(),
  getById: jest.fn(),
  find: jest.fn(),
  createDocument: jest.fn(),
  updateDocument: jest.fn(),
  deleteDocument: jest.fn(),
  findByType: jest.fn(),
  findUserById: jest.fn(),
  update: jest.fn(),
}));

const postRoutes = require('../../routes/posts');
const { createTestUser, createTestPost } = require('../utils/testHelpers');
const couchdbService = require('../../services/couchdbService');

const app = express();
app.use(express.json());
app.use('/api/posts', postRoutes);

describe('Post Routes', () => {
  beforeEach(() => {
    jest.clearAllMocks();
  });

  describe('GET /api/posts', () => {
    it('should get all posts with user information', async () => {
      const { user } = await createTestUser();
      await createTestPost(user.id, { content: 'First post' });
      await createTestPost(user.id, { content: 'Second post' });

      const response = await request(app)
        .get('/api/posts')
        .expect(200);

      expect(Array.isArray(response.body)).toBe(true);
      expect(response.body.length).toBe(2);
      expect(response.body[0]).toHaveProperty('content');
      expect(response.body[0]).toHaveProperty('user');
    });

    it('should return empty array when no posts exist', async () => {
      // Mock Post.findAll and Post.countDocuments
      couchdbService.find
        .mockResolvedValueOnce([]) // For findAll
        .mockResolvedValueOnce([]); // For countDocuments

      const response = await request(app)
        .get('/api/posts')
        .expect(200);

      expect(Array.isArray(response.body.data)).toBe(true);
      expect(response.body.data.length).toBe(0);
    });
  });

  describe('POST /api/posts', () => {
    it('should create a new post with authentication', async () => {
      const { user, token } = await createTestUser();

      const postData = {
        content: 'This is my new post about street cleaning',
        imageUrl: 'https://example.com/image.jpg',
      };

      const response = await request(app)
        .post('/api/posts')
        .set('x-auth-token', token)
        .send(postData)
        .expect(200);

      expect(response.body).toHaveProperty('content', postData.content);
      expect(response.body).toHaveProperty('imageUrl', postData.imageUrl);
      expect(response.body).toHaveProperty('user', user.id);
    });

    it('should create a post with only content (no image)', async () => {
      const { token } = await createTestUser();

      const postData = {
        content: 'Just text content',
      };

      const response = await request(app)
        .post('/api/posts')
        .set('x-auth-token', token)
        .send(postData)
        .expect(200);

      expect(response.body).toHaveProperty('content', postData.content);
    });

    it('should not create post without authentication', async () => {
      const postData = {
        content: 'This should fail',
      };

      const response = await request(app)
        .post('/api/posts')
        .send(postData)
        .expect(401);

      expect(response.body).toHaveProperty('msg', 'No token, authorization denied');
    });
  });

  describe('PUT /api/posts/like/:id', () => {
    it('should like a post', async () => {
      const { user: author } = await createTestUser({ email: 'author@example.com' });
      const { user: liker, token } = await createTestUser({ email: 'liker@example.com' });
      const post = await createTestPost(author.id);

      const response = await request(app)
        .put(`/api/posts/like/${post.id}`)
        .set('x-auth-token', token)
        .expect(200);

      expect(Array.isArray(response.body)).toBe(true);
      expect(response.body.length).toBe(1);
      expect(response.body[0]).toBe(liker.id);
    });

    it('should not like a post twice', async () => {
      const { user: author } = await createTestUser({ email: 'author@example.com' });
      const { user: liker, token } = await createTestUser({ email: 'liker@example.com' });
      const post = await createTestPost(author.id);

      // Like the first time
      await request(app)
        .put(`/api/posts/like/${post.id}`)
        .set('x-auth-token', token)
        .expect(200);

      // Try to like again
      const response = await request(app)
        .put(`/api/posts/like/${post.id}`)
        .set('x-auth-token', token)
        .expect(400);

      expect(response.body).toHaveProperty('msg', 'Post already liked');
    });

    it('should return 404 for non-existent post', async () => {
      const { token } = await createTestUser();
      const fakeId = '507f1f77bcf86cd799439011';

      const response = await request(app)
        .put(`/api/posts/like/${fakeId}`)
        .set('x-auth-token', token)
        .expect(404);

      expect(response.body).toHaveProperty('msg', 'Post not found');
    });

    it('should not like post without authentication', async () => {
      const { user } = await createTestUser();
      const post = await createTestPost(user.id);

      const response = await request(app)
        .put(`/api/posts/like/${post.id}`)
        .expect(401);

      expect(response.body).toHaveProperty('msg', 'No token, authorization denied');
    });
  });
});