import { createRouter, createWebHistory } from 'vue-router'
import { useUserStore } from '@/stores/user'
import { useTabsStore } from '@/stores/tabs'
import { resolveTable, resolveDetail, resolvePrint, resolveWorkflow, SPECIAL_PAGES } from '@/config/table-map'

// 静态路由（与权限无关）
export const constantRoutes = [
  {
    path: '/login',
    name: 'Login',
    component: () => import('@/views/login/index.vue'),
    meta: { title: '登录' }
  },
  {
    path: '/',
    name: 'root',
    component: () => import('@/layout/index.vue'),
    redirect: '/workbench',
    children: [
      {
        path: '/workbench',
        name: 'WorkBench',
        component: () => import('@/views/workbench/index.vue'),
        meta: { title: '工作台', affix: true }
      },
      {
        path: '/404',
        name: 'NotFound',
        component: () => import('@/views/error/404.vue'),
        meta: { title: '页面不存在' }
      },
      {
        path: '/process/zhuangkou-detail/:id',
        name: 'ProcessZhuangkouDetail',
        component: () => import('@/views/process/zhuangkou-detail.vue'),
        meta: { title: '工艺庄口详情', hidden: true }
      },
      {
        path: '/workflow/todo',
        name: 'WorkFlowTodo',
        component: () => import('@/views/workflow/todo.vue'),
        meta: { title: '待办中心' }
      },
      {
        path: '/workflow/my',
        name: 'WorkFlowMy',
        component: () => import('@/views/workflow/my.vue'),
        meta: { title: '我发起的' }
      },
      {
        path: '/im/monitor',
        name: 'ImMonitor',
        component: () => import('@/views/im/monitor.vue'),
        meta: { title: 'IM性能监测' }
      },
      {
        path: '/im/service',
        name: 'ImService',
        component: () => import('@/views/im/service.vue'),
        meta: { title: 'IM服务监测' }
      },
      {
        path: '/im/config',
        name: 'ImConfig',
        component: () => import('@/views/im/config.vue'),
        meta: { title: 'IM配置界面' }
      },
      {
        path: '/im/message',
        name: 'ImMessage',
        component: () => import('@/views/im/message.vue'),
        meta: { title: '消息与公告管理' }
      }
    ]
  },
  {
    path: '/:pathMatch(.*)*',
    redirect: '/404',
    meta: { hidden: true }
  }
]

const router = createRouter({
  history: createWebHistory(),
  routes: constantRoutes,
  scrollBehavior: () => ({ top: 0 })
})

// 拍平菜单树，收集页面节点
export function flattenMenus(menus, arr = []) {
  for (const m of menus || []) {
    if (m.menuType === 1 && !SPECIAL_PAGES.has(m.component)) {
      arr.push(m)
    }
    if (m.children?.length) flattenMenus(m.children, arr)
  }
  return arr
}

// 根据菜单动态注册业务路由
export function registerDynamicRoutes(menus) {
  const pages = flattenMenus(menus)
  for (const p of pages) {
    if (router.hasRoute(p.name)) continue
    const table = resolveTable(p.component)
    router.addRoute('root', {
      path: p.path,
      name: p.path || p.component,
      component: () => import('@/components/CrudPage.vue'),
      meta: {
        title: p.title || p.name,
        tableName: table,
        component: p.component,
        detailRoute: resolveDetail(p.component),
        printTemplate: resolvePrint(p.component),
        workflow: resolveWorkflow(p.component)
      }
    })
  }
}

let guardInited = false

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

  if (to.path === '/login') {
    // 退出登录/未登录跳转登录页时清空页签
    useTabsStore().reset()
    next()
    return
  }

  if (!userStore.isLogin) {
    next(`/login?redirect=${encodeURIComponent(to.fullPath)}`)
    return
  }

  // 已登录：首次进入加载菜单并注册动态路由
  if (!userStore.loaded) {
    try {
      await userStore.loadMenus()
      registerDynamicRoutes(userStore.menus)
      initAffixTabs()
      guardInited = true
      next({ ...to, replace: true })
    } catch (e) {
      userStore.logout()
      next(`/login?redirect=${encodeURIComponent(to.fullPath)}`)
    }
    return
  }

  // 刷新后路由已注册但 guard 标记未恢复（页面刷新时 addRoute 丢失）
  if (!guardInited) {
    registerDynamicRoutes(userStore.menus)
    initAffixTabs()
    guardInited = true
    next({ ...to, replace: true })
    return
  }

  next()
})

/** 初始化固定页签（工作台） */
function initAffixTabs() {
  useTabsStore().addTab({
    path: '/workbench',
    fullPath: '/workbench',
    name: 'WorkBench',
    meta: { title: '工作台', affix: true }
  })
}

// 导航完成后：记录页签、同步浏览器标题（格式与 CrudPage 保持一致）
router.afterEach((to) => {
  useTabsStore().addTab(to)
  const title = to.meta?.title
  document.title = title ? `${title} - F9智慧缫丝系统` : 'F9智慧缫丝系统'
})

export default router