import React, {Component} from 'react'
import {HashRouter, Switch, Route, Redirect} from 'react-router-dom'
import moment from 'moment'
import md5 from 'md5'
import asyncComponent from '@/utils/asyncComponent'
const main = asyncComponent(() => import('@/views/main'))
const login = asyncComponent(() => import('@/views/login'))
const NotFound = asyncComponent(() => import('@/views/404'))

const routers = [
  {path: '/login', name: 'login', component: login, auth: false},
  {path: '/main', name: 'main', component: main, auth: true},
  {path: '/main/:param', name: 'pmain', component: main, auth: true}
]

export default class RouteConfig extends Component {
  controlRoute (item, props) {
    if (!item.auth) { // 不需要授权，直接跳转（登录页）
      return (<item.component {...props}/>)
    }

    if (item.name === 'pmain') { // 新窗口打开，取url参数放入sessionStorage
      let _param = window.atob(props.match.params.param)
      sessionStorage.setItem('view_param', _param)
      return (<Redirect to={{ pathname: '/main'}}/>)
    }
    
    let userId = sessionStorage.getItem('UserID') // 判断是否存在userid

    let authCode = localStorage.getItem('AuthCode') // 判断系统是否在授权期限内
    let _s = md5('mksoft' + moment().format('YYYYMMDD'))
    let isauth = authCode && authCode.includes(_s)

    if (userId && isauth) {
      return (<item.component {...props}/>)
    } else {
      let param = sessionStorage.getItem('view_param')
      if (param) {
        param = param.split('&')
        sessionStorage.setItem('UserID', param[3])
        return (<item.component {...props}/>)
      } else {
        return (<Redirect to={{ pathname: '/login', state: {from: props.location}}}/>)
      }
    }
  }

  render () {
    return (
      <HashRouter>
        <Switch>
          {
            routers.map((item, index) => {
              return (
                <Route key={index} path={item.path} name={item.name} exact render={ props => {
                  return this.controlRoute(item, props)
                }}/>
              )
            })
          }
          <Redirect exact from="/" to="login"/>
          <Route component= {NotFound}/>
        </Switch>
      </HashRouter>
    )
  }
}