const UserRepository = require('src/user/userRepository');
const userRepository = new UserRepository();
 const fetch = require('node-fetch');
 const FormData = require('form-data');

function handleError(error, res) {
  let { status, message, source } = error;

  if (status && message) {
    if (status === 401) {
      message = 'Unauthorized. Please check plex credentials.',
      source = 'plex'
    }

    res.status(status).send({ success: false, message, source })
  } else {
    console.log('caught authenticate plex account controller error', error)
    res.status(500).send({
      message: 'An unexpected error occured while authenticating your account with plex',
      source
    })
  }
}

function handleResponse(response) {
  if (!response.ok) {
    throw {
      success: false,
      status: response.status,
      message: response.statusText
    }
  }

  return response.json()
}

function plexAuthenticate(username, password) {
  const url = 'https://plex.tv/api/v2/users/signin'

  const form = new FormData()
  form.append('login', username)
  form.append('password', password)
  form.append('rememberMe', 'false')

  const headers = {
    'Accept': 'application/json, text/plain, */*',
    'Content-Type': form.getHeaders()['content-type'],
    'X-Plex-Client-Identifier': 'seasonedRequest'
  }
  const options = {
    method: 'POST',
    headers,
    body: form
  }

  return fetch(url, options)
    .then(resp => handleResponse(resp))
}

function link(req, res) {
  const user = req.loggedInUser;
  const { username, password } = req.body;

  return plexAuthenticate(username, password)
    .then(plexUser => userRepository.linkPlexUserId(user.username, plexUser.id))
    .then(response => res.send({
      success: true,
      message: "Successfully authenticated and linked plex account with seasoned request."
    }))
    .catch(error => handleError(error, res))
}

function unlink(req, res) {
  const user = req.loggedInUser;

  return userRepository.unlinkPlexUserId(user.username)
    .then(response => res.send({
      success: true,
      message: "Successfully unlinked plex account from seasoned request."
    }))
    .catch(error => handleError(error, res))
}

module.exports = {
  link,
  unlink
};