import fetch from 'node-fetch'
import jsonwebtoken from 'jsonwebtoken'

import * as types from 'app/types'
import { session } from 'app/session'

const urls = {
  login: "/api/v1/auth/login",
}

export const login = data => dispatch => (
  fetch(urls.login, {
    method: 'POST',
    body: JSON.stringify(data),
    credentials: 'same-origin',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    }
  })
  .then(req => req.json())
  .then(res => {
    if (!res.token) {
      throw new Error(res.description)
    }
    session.set('access_token', res.token)
    load_access_token()(dispatch)
  })
)

export const load_access_token = () => dispatch => {
  const access_token = session.get('access_token') || null
  if (access_token) {
    const creds = jsonwebtoken.decode(access_token)
    return dispatch({ type: types.auth.logged_in, user: creds.sub })
  } else {
    return dispatch({ type: types.auth.logged_out })
  }
}

export const logout = (e) => dispatch => {
  e && e.preventDefault()
  session.set('access_token', '')
  return dispatch({ type: types.auth.logged_out })
}