const { validateUser } = require('../data/users')

const {
  compose, curry, objOf
} = require('crocks')

module.exports = ({ config, express, jwt, knex }) => {
  const { jwtSecret } = config
  const router = express.Router()

  const setCookie = res => payload => {
    res.cookie('token', jwt.sign(payload, jwtSecret))
    res.redirect('/')
  }

  const render = curry(
    (res, locals) => res.render('login', locals)
  )

  router.get('/', (req, res) => {
    render(res, {})
  })

  router.post('/', (req, res) => {
    const { body } = req

    validateUser({ knex }, body)
      .fork(
        compose(render(res), objOf('flash')),
        setCookie(res)
      )
  })

  router.get('/logout', (req, res) => {
    res.redirect('/')
  })

  return router
}