import router from './router'
import {resetRouter} 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' // get token from cookie
import getPageTitle from '@/utils/get-page-title'
import Layout from '@/layout'
const _import = require('./router/_import_' + process.env.NODE_ENV) // 获取组件的方法

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

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()
  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          await store.dispatch('user/getInfo')

          // 请求获取路由表
          await store.dispatch('user/getRouter')
          if (store.getters.menus.length < 1) {
            global.antRouter = []
            next()
          }

          // 设置路由
          var newRoutes = []
          for (var route of store.getters.menus) {
            const item = buildRootRoute(route)
            newRoutes.push(item)
          }
          // newRoutes.shift();

          // 添加一项根目录重定向页面
          if(newRoutes[0].path != '/') {
            let path = newRoutes[0].path;
            if(newRoutes[0].children.length > 0) {
              path = `${path}/${newRoutes[0].children[0].path}`
            }
            if(newRoutes[0].children[0].children.length > 0) {
              path = `${path}/${newRoutes[0].children[0].children[0].path}`
            }
            newRoutes.unshift({
              path: '/',
              component: Layout,
              redirect: path
            })
          }else {
            newRoutes[0].redirect = '/dashboard'
          }

          console.log(newRoutes);
          router.addRoutes(newRoutes) // 2.动态添加路由
          global.antRouter = newRoutes // 3.将路由数据传递给全局变量，做侧边栏菜单渲染工作

          // const menus = filterAsyncRouter(store.getters.menus) // 1.过滤路由
          // console.log(menus);
          // router.addRoutes(menus) // 2.动态添加路由
          // global.antRouter = menus // 3.将路由数据传递给全局变量，做侧边栏菜单渲染工作
          next({
            ...to,
            replace: true
          })
          // next()
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

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

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap) {
  const accessedRouters = asyncRouterMap.filter(route => {
    console.log(route);
    if (route.component) {
      if (route.component === 'Layout') {
        route.component = Layout
      } else {
        route.component = _import(route.component) // 导入组件
      }
    }
    if (route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children)
    }
    return true
  })
  return accessedRouters
}

function buildRootRoute(route) {
  const { url, icon, moduleName, moduleId, code, type } = route
  var item = {}
  item.path = url
  item.component = Layout
  item.name = code
  item.meta = {
    title: moduleName,
    icon: icon
  }
  if(code == 'index') {
    item.path = '/';
    item.alwaysShow = false;
    let children = route.children;
    route.children = [];
    route.children.push(
      {
        'code': "dashboard",
        'moduleName': "首页",
        'type': 2,
        'url': '/dashboard',
        'children': children
      }
    )
  }
  if (code == 'issue') {
    let children = route.children;
    route.children = [];
    route.children.push(
      {
        'code': "issue_index",
        'moduleName': "文件下发",
        'type': 2,
        'url': '/index',
        'children': children
      }
    )
    item.alwaysShow = false;
  }
  if (code == 'notice') {
    let children = route.children;
    route.children = [];
    route.children.push(
      {
        'code': "notice_index",
        'moduleName': "系统通知",
        'type': 2,
        'url': '/index',
        'children': children
      }
    )
    item.alwaysShow = false;
  }
  item.children = []
  if ((route.hasOwnProperty('children') && type === 1) || code == 'issue' || code == 'notice' || code == 'index') {
    for (var child of route.children) {
      item.children.push(buildRoute(child, url))
    }
  }
  return item
}

function buildRoute(route, p_url) {
  const { url, moduleName, icon, moduleId, code, type, hidden } = route
  var item = {}
  if(url.substr(0, 1) == '/') {
    item.path = url.substr(1)
  }else {
    item.path = url
  }
  try {
    if(code == 'dashboard') {
      // item.component = _import(`${url}/index`)
      item.component = (resolve) => require(["@/views"+`${url}/index`], resolve)
    }
    else {
      item.component = _import(`${p_url}${url}`)
    }
  } catch (e) {
    console.log(e)
  }
  item.name = code
  item.meta = {
    title: moduleName,
    icon: icon
  }
  if((route.children && type == 2)) {
    let roles = [];
    for(var role of route.children) {
      roles.push(role.code)
    }
    item.meta.roles = roles;
  }
  item.hidden = hidden
  item.children = []
  if (route.hasOwnProperty('children') && type === 1) {
    for (var child of route.children) {
      item.children.push(buildThirdRoute(child, `${p_url}${url}`))
    }
  }
  return item
}

function buildThirdRoute(route, p_url) {
  const { url, moduleName, icon, moduleId, code, hidden, type } = route
  var item = {}
  if(url.substr(0, 1) == '/') {
    item.path = url.substr(1)
  }else {
    tem.path = url
  }
  try {
    item.component = _import(`${p_url}${url}`)
  } catch (e) {
    console.log(e)
  }
  item.name = code

  item.meta = {
    title: moduleName,
    icon: icon
  }
  if(route.children && type == 2) {
    let roles = [];
    for(var role of route.children) {
      roles.push(role.code)
    }
    item.meta.roles = roles;
  }
  item.hidden = hidden
  item.children = []
  return item
}