import { createRouter, createWebHistory } from 'vue-router'
import { useUserStore } from '@/stores/user'
import MainLayout from '@/layout/MainLayout.vue'

// 静态路由（无需权限）
const constantRoutes = [
  {
    path: '/login',
    name: 'Login',
    component: () => import('@/views/login/LoginView.vue'),
    meta: { title: '登录', noAuth: true },
  },
  {
    path: '/register',
    name: 'Register',
    component: () => import('@/views/login/RegisterView.vue'),
    meta: { title: '注册', noAuth: true },
  },
  {
    path: '/',
    name: 'MainLayout',
    component: MainLayout,
    redirect: '/dashboard',
    children: [
      {
        path: 'dashboard',
        name: 'Dashboard',
        component: () => import('@/views/dashboard/DashboardView.vue'),
        meta: { title: '仪表盘', icon: 'Odometer' },
      },
    ],
  },
  {
    path: '/:pathMatch(.*)*',
    redirect: '/dashboard',
  },
]

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

// 动态路由映射（后端菜单 component 路径 → 页面组件）
export const componentMap = {
  'views/medicine/MedicineList': () => import('@/views/medicine/MedicineList.vue'),
  'views/category/CategoryList': () => import('@/views/category/CategoryList.vue'),
  'views/supplier/SupplierList': () => import('@/views/supplier/SupplierList.vue'),
  'views/customer/CustomerList': () => import('@/views/customer/CustomerList.vue'),
  'views/stock/StockList': () => import('@/views/stock/StockList.vue'),
  'views/stockIn/StockInList': () => import('@/views/stockIn/StockInList.vue'),
  'views/stockIn/StockInForm': () => import('@/views/stockIn/StockInForm.vue'),
  'views/stockOut/StockOutList': () => import('@/views/stockOut/StockOutList.vue'),
  'views/stockOut/StockOutForm': () => import('@/views/stockOut/StockOutForm.vue'),
  'views/user/UserList': () => import('@/views/user/UserList.vue'),
  'views/role/RoleList': () => import('@/views/role/RoleList.vue'),
  'views/menu/MenuList': () => import('@/views/menu/MenuList.vue'),
}

// 根据后端菜单数据生成路由
function generateRoutes(menus) {
  const routes = []
  menus.forEach((menu) => {
    if (menu.type === 2 && menu.path && menu.component) {
      routes.push({
        path: menu.path.toLowerCase(),
        name: menu.name,
        component: componentMap[menu.component] || null,
        meta: { title: menu.name, icon: menu.icon },
      })
    }
    if (menu.children?.length) {
      routes.push(...generateRoutes(menu.children))
    }
  })
  return routes
}

let isMenusLoaded = false

router.beforeEach(async (to, _from, next) => {
  const userStore = useUserStore()

  if (to.meta.noAuth) {
    next()
    return
  }

  if (!userStore.token) {
    next('/login')
    return
  }

  // 动态注册菜单路由（仅首次）
  if (!isMenusLoaded) {
    try {
      const menus = await userStore.getMenus()
      if (menus.length) {
        const dynamicRoutes = generateRoutes(menus)
        dynamicRoutes.forEach((route) => {
          router.addRoute('MainLayout', route)
        })
      }
    } catch {
      // 后端未启动，跳过
    }
    isMenusLoaded = true
    next({ ...to, replace: true })
    return
  }

  next()
})

export default router