import { IS_USER_LOGGED_IN } from '../actions/actionCreators'
import jwtDecode from 'jwt-decode'

const defaultState = {
  userLoading: false,
  username: "",
  isAdmin: false,
  isLogged: false,
};

// This actions are generated from the promise middleware

export default function userStore(state = defaultState, action) {
  switch (action.type) {
    case 'USER_LOGIN_PENDING':
      return Object.assign({}, state, {
        userLoading: true,
      })
    case 'USER_LOGIN_FULFILLED':
      if (action.payload.data.type === "error") {
        return logoutUser(state)
      }
      return updateFromToken(state, action.payload.data.token)
    case IS_USER_LOGGED_IN:
      let localToken = localStorage.getItem('token');
      if (!localToken || localToken === "") {
        return state;
      }
      return updateFromToken(state, localToken)
    default:
      return state;
  }
}

function logoutUser(state) {
  localStorage.removeItem('token');
  return Object.assign({}, state, defaultState)
}

function updateFromToken(state, token) {
  const decodedToken = jwtDecode(token);
  localStorage.setItem('token', token);
  return Object.assign({}, state, {
    userLoading: false,
    isLogged: true,
    isAdmin: decodedToken.isAdmin,
    username: decodedToken.username,
  })
}