import { createRouter, createWebHistory } from 'vue-router'
import { hasValidToken, getUserInfo, logoutUser, getStoredUser } from '../utils/jwt';
import { justLoggedIn } from '../utils/authSessionState';
import EditorsMaps from '@/views/index/EditorsMaps.vue'
import mitt from 'mitt'
import { hasPrivilege, hasPrivilegeWithTemp } from '@/utils/privilege'

const routes = [
  {
    path: '/dashboard',
    redirect: '/backend/dashboard'
  },
  {
    path: '/',
    component: () => import('@/views/index.vue'),
    children: [
      {
        path: '',
        name: 'Home',
        component: () => import('@/views/index/Home.vue')
      },
      {
        path: 'demands',
        name: 'DemandList',
        component: () => import('@/views/index/DemandList.vue'),
        meta: { requiresAuth: true }
      },
      {
        path: 'maps',
        name: 'Maps',
        component: () => import('@/views/index/Maps.vue')
      },
      {
        path: 'weekly',
        name: 'WeeklyRecommend',
        component: () => import('@/views/index/WeeklyRecommend.vue')
      },
      {
        path: 'map/:id',
        name: 'MapDetail',
        component: () => import('@/views/index/MapDetail.vue')
      },
      {
        path: 'author',
        name: 'ActiveAuthor',
        component: () => import('@/views/index/ActiveAuthor.vue')
      },
      {
        path: 'weapon-match',
        name: 'WeaponMatch',
        component: () => import('@/views/weapon/WeaponMatch.vue'),
        meta: { requiresAuth: true, requiredPrivilege: ['lv-admin','lv-mod'] }
      },
      {
        path: 'configEditor',
        name: 'ConfigEditor',
        component: () => import('@/views/index/ConfigEditor.vue'),
        meta: { requiresAuth: true, requiredPrivilege: ['lv-admin','lv-mod'] }
      },
      {
        path: 'competition',
        name: 'Competition',
        component: () => import('@/views/competition/Competition.vue'),
        // meta: { requiresAuth: true, requiredPrivilege: ['lv-admin','lv-competitor'] }
        meta: { requiresAuth: true}
      },
      {
        path: 'competition/add',
        name: 'AddCompetition',
        component: () => import('@/views/competition/AddContestant.vue'),
        meta: { requiresAuth: true }
      },
      {
        path: 'competition/detail',
        name: 'CompetitionDetail',
        component: () => import('@/views/competition/CompetitionDetail.vue'),
        meta: { requiresAuth: true }
      },
      {
        path: 'competition/signup',
        name: 'CompetitionSignUp',
        component: () => import('@/views/competition/CompetitionSignUp.vue'),
        meta: { requiresAuth: true }
      },
      // {
      //   path: 'competition',
      //   name: 'Competition',
      //   component: () => import('@/views/competition/Competition.vue'),
      //   meta: { requiresAuth: true}
      // },
      {
        path: 'editors-maps',
        name: 'EditorsMaps',
        component: () => import('@/views/index/EditorsMaps.vue')
      },
      {
        path:'terrain',
        name: 'Terrain',
        component: () => import('@/views/index/TerrainList.vue')
      },
      {
        path: 'PIC2TGA',
        name: 'PIC2TGA',
        component: () => import('@/views/index/PIC2TGA.vue'),
        meta: { requiredPrivilege: ['lv-admin','lv-mod','lv-map','lv-competitor'] }
      },
      {
        path: 'terrainGenerate',
        name: 'TerrainGenerate',
        component: () => import('@/views/index/TerrainGenerate.vue'),
        meta: { requiredPrivilege: ['lv-admin','lv-mod','lv-map','lv-competitor'] }
      }
    ]
  },
  {
    path: '/backend',
    component: () => import('@/views/backend.vue'),
    children: [
      {
        path: '',
        redirect: 'dashboard'
      },
      {
        path: 'login',
        name: 'Login',
        component: () => import('@/views/backend/Login.vue')
      },
      {
        path: 'dashboard',
        name: 'Dashboard',
        component: () => import('@/views/backend/Dashboard.vue'),
        meta: { requiresAuth: true }
      }
    ]
  },
  {
    path: '/user/resetpassword/:token',
    name: 'ResetPassword',
    component: () => import('@/views/ResetPassword.vue')
  }
]

const router = createRouter({
  history: createWebHistory(),
  routes,
  linkActiveClass: 'router-link-active',
  linkExactActiveClass: 'router-link-exact-active'
})

export const eventBus = mitt()

// 路由守卫
router.beforeEach(async (to, from, next) => {
  const requiresAuth = to.matched.some(record => record.meta.requiresAuth);
  const requiredPrivilege = to.matched.find(record => record.meta.requiredPrivilege)?.meta.requiredPrivilege;

  if (!requiresAuth && !requiredPrivilege) {
    return next(); // 如果页面不需要认证和权限，直接放行
  }
  
  if (hasValidToken()) {
    try {
      await getUserInfo(); // 尝试获取用户信息，该函数会把用户信息存入SessionStorage
      // 继续检查权限
    } catch (error) {
      // 获取失败 (token无效, 网络问题等)
      logoutUser(); // 清除所有凭证
      return next({
        path: '/backend/login',
        query: { redirect: to.fullPath, sessionExpired: 'true' }
      });
      // return next('/maps')
    }
  }

  // 登录校验：如果页面需要登录但本地没有有效 token，则跳转登录页
  if (requiresAuth && !hasValidToken()) {
    return next({
      path: '/',
      query: { redirect: to.fullPath }
    })
  }

  // 权限校验
  if (requiredPrivilege) {
    const user = getStoredUser();
    if (!user || !hasPrivilegeWithTemp(user, requiredPrivilege)) {
      // 通过事件总线通知弹窗
      eventBus.emit('no-privilege')
      return next({ path: '/', replace: true })
    }
  }

  return next();
});

export default router