const router = require('express-promise-router')()
const parseJSON = require('body-parser').json()
const db = require('../db')
const ensureAdmin = require('./middleware/ensureAdmin')
const ensureUser = require('./middleware/ensureUser')
const email = require('../utils/email')

const sendgrid = require('@sendgrid/mail')
sendgrid.setApiKey(process.env.SENDGRID_KEY)

const validate = require('./middleware/validators')

const registerValidation = [
  validate.unusedEmail('email'),
  validate.validPassword('password'),
  validate.bothPasswordsMatch,
  validate.handleApiError
]

router.post('/', parseJSON, registerValidation, async (req, res) => {
  const user = await db.user.register(
    req.body.email,
    req.body.password
  )

  if(!user){
    return res.status(422).json({errors: [{
      param: 'email',
      msg: 'Unable to complete registration'
    },{
      param: 'password',
      msg: ' '
    },{
      param: 'password2',
      msg: ' '
    }]})
  }

  await db.session.create(req, user)
  await email.sendAccountConfirmation(user)

  res.json(user)
})

router.post('/recover', parseJSON, validate.validEmail('email'), async (req, res) => {
  const user = await db.user.findByEmail(req.body.email)

  if(user)
    email.sendPasswordReset(user)
  else
    email.sendNoSuchAccount(req.body.email)

  res.end()
})

router.post('/recover/password', parseJSON,
validate.validPassword('password'),
validate.bothPasswordsMatch, async (req, res) => {
  const {password, link_uuid, link_key} = req.body

  const user = await db.user.verifyPasswordReset(link_uuid, link_key)
  if(!user){
    return res.status(422).json({errors: [{
      param: 'password',
      msg: 'Invalid reset link'
    }]})
  }

  await email.sendPasswordChanged(user)

  const updatedUser = await db.user.overwritePassword(user.uuid, password)
  await db.user.markLinkUsed(link_uuid)
  await db.session.create(req, updatedUser)

  res.json(updatedUser)
})

router.get('/', ensureAdmin, async (req, res) => {
  const users = await db.user.findAll()
  res.json(users)
})

router.get('/:uuid', ensureAdmin, async (req, res) => {
  const user = await db.user.findById(req.params.uuid)
  res.json(user)
})

router.get('/:uuid/orders', ensureAdmin, async (req, res) => {
  return res.json(await db.order.findAllForUser(req.params.uuid))
})

router.put('/:uuid/admin', ensureAdmin, async (req, res) => {
  const user = await db.user.makeAdmin(req.params.uuid)
  res.json(user)
})

router.delete('/:uuid/admin', ensureAdmin, async (req, res) => {
  const user = await db.user.removeAdmin(req.params.uuid)
  res.json(user)
})

const changePasswordValidation = [
  validate.validPassword('password'),
  validate.bothPasswordsMatch,
  validate.oldPasswordNotSame,
  validate.handleApiError
]
router.put('/current/password', parseJSON, changePasswordValidation, ensureUser, async (req, res) => {
  const user = await db.user.changePassword(
    req.user.uuid,
    req.body.oldPassword,
    req.body.password
  )

  if(!user){
    return res.status(403).json({errors: [{
      param: 'oldPassword',
      msg: 'Incorrect password'
    }]})
  }

  await email.sendPasswordChanged(user)

  res.json(user)
})

module.exports = router;