import Vue from 'vue'
import VueRouter from 'vue-router'

Vue.use(VueRouter)

const _import = require('./import-' + process.env.NODE_ENV)
const routes = [
  // {
  //   path: '*',
  //   redirect: '/404'
  // },
  {
    path: '/404',
    name: '404',
    component: _import('page/404/index')
  },
  {
    path: '/',
    name: 'index',
    component: _import('views/index/index')
  }
]

const router = new VueRouter({
  mode: 'history',
  routes,
  scrollBehavior (to, from, savedPosition) {
    if (to.hash) {
      return {
        selector: to.hash
      }
    }
    // keep-alive 返回缓存页面后记录浏览位置
    if (savedPosition && to.meta.keepAlive) {
      return savedPosition
    }
    // 异步滚动操作
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve({ x: 0, y: 1 })
      }, 0)
    })
  }
})

export default router