const mongoose = require('mongoose')
const supertest = require('supertest')
const app = require('../app')

const api = supertest(app)

const Blog = require('../models/blog')
const helper = require('./test_helper')

beforeEach(async () => {
  await Blog.deleteMany({})
  await Blog.insertMany(helper.initialBlogs)
})

test('blogs are returned as json', async () => {
  await api
    .get('/api/blogs')
    .expect(200)
    .expect('Content-Type', /application\/json/)
})

test('all blogs are returned', async () => {
  const response = await api.get('/api/blogs')
  expect(response.body).toHaveLength(helper.initialBlogs.length)
})

test('a specific blog is within the returned blogs', async () => {
  const response = await api.get('/api/blogs')
  const contents = response.body.map((r) => r.title)
  expect(contents).toContain('Another blog')
})

test('a valid blog can be added ', async () => {
  const newBlog = {
    title: 'Test',
    author: 'Tester',
    url: 'http:/test.com',
    likes: 999
  }

  await api
    .post('/api/blogs')
    .send(newBlog)
    .expect(201)
    .expect('Content-Type', /application\/json/)

  const blogsAtEnd = await helper.blogsInDb()
  expect(blogsAtEnd).toHaveLength(helper.initialBlogs.length + 1)
  const contents = blogsAtEnd.map((n) => n.title)
  expect(contents).toContain('Test')
})

test('blog without content is not added', async () => {
  const newBlog = {
    likes: 999
  }

  await api.post('/api/blogs').send(newBlog).expect(400)

  const blogsAtEnd = await helper.blogsInDb()
  expect(blogsAtEnd).toHaveLength(helper.initialBlogs.length)
})

afterAll(async () => {
  await mongoose.connection.close()
})