import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'
import { getToken } from '@/utils/auth'
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false })

const whiteList = ['/login', '/auth-redirect']

router.beforeEach(async(to, from, next) => {
  NProgress.start()
  document.title = getPageTitle(to.meta.title)

  // 关键修改1：对 getToken() 返回值判空，避免 null 后续被操作
  const hasToken = getToken() || ''

  if (hasToken) {
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else {
      // 关键修改2：对 roles 判空，避免 null 调用 length
      const hasRoles = Array.isArray(store.getters.roles) && store.getters.roles.length > 0
      if (hasRoles) {
        next()
      } else {
        try {
          // 关键修改3：解构时给 roles 赋默认值，避免返回 null
          const { roles = [] } = await store.dispatch('user/getInfo')

          // 关键修改4：确保 roles 是数组再传入
          const accessRoutes = await store.dispatch('permission/generateRoutes', roles)

          // 关键修改5：对 accessRoutes 判空，避免 addRoutes 传入 null/undefined
          if (Array.isArray(accessRoutes) && accessRoutes.length) {
            router.addRoutes(accessRoutes)
          }

          next({ ...to, replace: true })
        } catch (error) {
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    if (whiteList.indexOf(to.path) !== -1) {
      try {
        const loginForm = {
          username: 'admin',
          password: '123456'
        }

        // 关键修改6：登录后再次校验 token，避免返回 null
        await store.dispatch('user/login', loginForm)
        const newToken = getToken()
        if (!newToken) {
          throw new Error('登录失败：未获取到 token')
        }

        const redirect = to.query.redirect || '/'
        const otherQuery = { ...to.query }
        delete otherQuery.redirect

        next({ path: redirect, query: otherQuery, replace: true })
      } catch (error) {
        Message.error(error.message || '登录失败，请重试')
        next()
      } finally {
        NProgress.done()
      }
    } else {
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  NProgress.done()
})