import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css'// progress bar style
import { getToken } from '@/utils/auth' // getToken from cookie

NProgress.configure({ showSpinner: false })// NProgress Configuration

// permission judge function
function hasPermission(roles, permissionRoles) {
  if (roles.indexOf('admin') >= 0) return true // admin permission passed directly
  if (!permissionRoles) return true
  return roles.some(role => permissionRoles.indexOf(role) >= 0)
}

const whiteList = ['/login', '/auth-redirect']// no redirect whitelist

export const beforeEachRoute = (to, from, next) => {
  NProgress.start() // start progress bar
  if (getToken()) { // determine if there has token
    /* has token*/
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done() // if current page is dashboard will not trigger	afterEach hook, so manually handle it
    } else {
      if (store.getters.roles.length === 0) {
        store.dispatch('GetUserInfo').then(res => {
          const roles = res.data.rights.admin ? ['admin'] : []
          store.dispatch('GenerateRoutes', { roles }).then(() => {
            router.addRoutes(store.getters.addRouters)
            next({ ...to, replace: true })
          })
        }).catch((err) => {
          store.dispatch('FedLogOut').then(() => {
            Message.error(err)
            next({ path: '/' })
          })
        })
      } else {
        if (hasPermission(store.getters.roles, to.meta.roles)) {
          next()
        } else {
          next({ path: '/401', replace: true, query: { noGoBack: true }})
        }
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      next()
    } else {
      next(`/login?redirect=${to.path}`)
      NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
}
router.beforeEach(beforeEachRoute)

router.afterEach(() => {
  NProgress.done() // finish progress bar
})