import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '@/views/login'
import Register from '@/views/register'
import Detail from '@/views/detail'
import Layout from '@/views/layout'

import Like from '@/views/like'
import Article from '@/views/article'
import Collect from '@/views/collect'
import User from '@/views/user'

import { getToken } from '@/utils/storage'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    // { path: '/', redirect: '/layout' },
    {
      path: '/',
      component: Layout,
      redirect: '/article',
      children: [
        { path: '/article', component: Article },
        { path: '/like', component: Like },
        { path: '/collect', component: Collect },
        { path: '/user', component: User }
      ]
    },
    { path: '/detail/:id', component: Detail },
    { path: '/login', component: Login },
    { path: '/register', component: Register }

  ]
})

// 白名单
const whiteList = ['/login']

// 在每一个路由在真正被访问之前，都会经过路由前置导航守卫
// 只有前置守卫放行，才能访问对应的路由
// 每个路由被访问前，都会调用这个函数

// to 往哪去  要去的路由
// from 从哪来  从哪个路由来
// next是否放行
//   next() 直接放行
//   next(path)  拦截某路由路径
// next(路径) 拦截到某个路径页面
router.beforeEach((to, from, next) => {
  // 1.判断是否有 token，有就直接放行
  // 2.无token，判断是否访问的是白名单页面
  const token = getToken()
  if (token) {
    next('/login')
  } else {
    if (whiteList.includes(to.path)) {
      next()
    } else {
      next('/login')
    }
  }
})

export default router