import { createRouter, createWebHistory, type RouteRecordRaw } from 'vue-router'

import { useUserStore } from '@/store/user'

const routes: RouteRecordRaw[] = [
  { path: '/', redirect: '/dashboard' },
  {
    path: '/login',
    name: 'login',
    component: () => import('@/views/login/index.vue'),
    meta: { public: true, title: '登录' },
  },
  {
    path: '/dashboard',
    name: 'dashboard',
    component: () => import('@/views/dashboard/index.vue'),
    meta: { title: '首页' },
  },
  // 未匹配路由回首页；若未登录会被守卫拦到登录页
  { path: '/:pathMatch(.*)*', redirect: '/dashboard' },
]

const router = createRouter({
  history: createWebHistory(),
  routes,
})

/**
 * 全局前置守卫。
 *
 * 三层判断：
 * 1. `meta.public` 标记的页面（登录页）直接放行
 * 2. 无令牌 → 跳登录页，并把原目标记在 query 里供登录后回跳
 * 3. 有令牌但内存中无用户信息（说明是刷新页面）→ 调 /me 恢复会话；
 *    失败则视为令牌已失效，清状态并跳登录页
 */
router.beforeEach(async (to) => {
  const userStore = useUserStore()

  if (to.meta.public) {
    return true
  }

  if (!userStore.token) {
    return { path: '/login', query: { redirect: to.fullPath } }
  }

  if (!userStore.userInfo) {
    try {
      await userStore.fetchUserInfo()
    } catch {
      userStore.resetAuth()
      return { path: '/login', query: { redirect: to.fullPath } }
    }
  }

  return true
})

router.afterEach((to) => {
  const title = to.meta.title as string | undefined
  document.title = title ? `${title} - ${import.meta.env.VITE_APP_TITLE}` : import.meta.env.VITE_APP_TITLE
})

export default router