// 路由配置 — 全站唯一路由声明处。
// 页面组件一律 React.lazy 懒加载；菜单（menuItems）与页面标题（findRouteMeta）
// 均由本文件派生，新增页面只需在这里加一条配置。
import { lazy } from 'react';
import {
  LayoutDashboard,
  Server,
  Monitor,
  HardDrive,
  Rocket,
  RadioTower,
  Settings,
  UsersRound,
  Wand2,
  ScrollText,
  BellRing,
  BarChart3,
  History,
  Boxes,
  ShieldCheck,
  Container,
} from 'lucide-react';
import type { AppRoute, MenuItem, RouteMeta } from '@/types/router';

const Login = lazy(() => import('@/pages/login'));
const Dashboard = lazy(() => import('@/pages/dashboard'));
const Clusters = lazy(() => import('@/pages/clusters'));
const Hosts = lazy(() => import('@/pages/hosts'));
const Storage = lazy(() => import('@/pages/storage'));
const Deployments = lazy(() => import('@/pages/deployments'));
const Collectors = lazy(() => import('@/pages/collectors'));
const SettingsPage = lazy(() => import('@/pages/settings'));
const LdapPage = lazy(() => import('@/pages/settings/ldap'));
const RegistryPage = lazy(() => import('@/pages/settings/registry'));
const NotFound = lazy(() => import('@/pages/not-found'));
const WizardPage = lazy(() => import('@/pages/wizard'));
const LogsPage = lazy(() => import('@/pages/logs'));
const AlertsPage = lazy(() => import('@/pages/alerts'));
const UsersPage = lazy(() => import('@/pages/users'));
const AnalysisPage = lazy(() => import('@/pages/analysis'));
const AuditPage = lazy(() => import('@/pages/audit'));

export const routes: AppRoute[] = [
  { path: '/login', component: Login, auth: false, meta: { title: 'menu.login', hideInMenu: true } },
  { path: '/', component: Dashboard, auth: true, meta: { title: 'menu.dashboard', icon: LayoutDashboard, order: 1, adminOnly: true } },
  { path: '/wizard', component: WizardPage, auth: true, meta: { title: 'menu.wizard', icon: Wand2, order: 2, adminOnly: true } },
  // ── 资源接入（集群 / 主机 / 存储）：装完基本不动的配置，合并为一个入口 ──
  {
    path: '/clusters', component: Clusters, auth: true,
    meta: {
      title: 'menu.clusters', icon: Server, order: 3, adminOnly: true,
      group: { key: 'resources', label: 'menu.groups.resources', icon: Boxes, order: 3 },
    },
  },
  { path: '/hosts', component: Hosts, auth: true, meta: { title: 'menu.hosts', icon: Monitor, order: 4, adminOnly: true, groupKey: 'resources' } },
  { path: '/storage', component: Storage, auth: true, meta: { title: 'menu.storage', icon: HardDrive, order: 5, adminOnly: true, groupKey: 'resources' } },

  // ── 日志服务（Loki 实例 / 采集器）：部署与采集是同一件事的两半 ──
  {
    path: '/deployments', component: Deployments, auth: true,
    meta: {
      // 组内 tab 名用「组件部署」：部署对象是基础设施组件（Loki 实例），
      // 与业务侧大量 cex-* 业务服务明确区分，避免误以为这里是发布业务服务。
      title: 'menu.deployments', icon: Rocket, order: 4, adminOnly: true,
      group: { key: 'services', label: 'menu.groups.services', icon: Rocket, order: 4 },
    },
  },
  { path: '/collectors', component: Collectors, auth: true, meta: { title: 'menu.collectors', icon: RadioTower, order: 7, adminOnly: true, groupKey: 'services' } },

  // ── 日志查询 / 日志分析：高频入口，保持独立菜单项（不折叠）──
  { path: '/logs', component: LogsPage, auth: true, meta: { title: 'menu.logs', icon: ScrollText, order: 5 } },
  { path: '/analysis', component: AnalysisPage, auth: true, meta: { title: 'menu.analysis', icon: BarChart3, order: 6, adminOnly: true } },

  // ── 告警：独立入口（要盯的，不能被折叠） ──
  // 告警仅管理员：普通用户按「查询授权」只看指定的日志（菜单只剩日志查询）。
  // 告警规则涉及阈值/通知通道等平台级配置，不属于日志查询者的职责。
  { path: '/alerts', component: AlertsPage, auth: true, meta: { title: 'menu.alerts', icon: BellRing, order: 7, adminOnly: true } },

  // ── 系统管理（用户 / 审计 / 设置）：低频管理动作 ──
  {
    path: '/users', component: UsersPage, auth: true,
    meta: {
      // 系统设置（tab 起点）/ 用户管理 / 审计日志 同属「系统设置」分组，
      // 侧栏只占一个入口，页面内用 tab 切换。
      title: 'menu.users', icon: UsersRound, order: 9, adminOnly: true,
      groupKey: 'system',
    },
  },
  { path: '/audit', component: AuditPage, auth: true, meta: { title: 'menu.audit', icon: History, order: 10, adminOnly: true, groupKey: 'system' } },
  { path: '/settings/ldap', component: LdapPage, auth: true, meta: { title: 'menu.ldap', icon: ShieldCheck, order: 11, adminOnly: true, groupKey: 'system' } },
  { path: '/settings/registry', component: RegistryPage, auth: true, meta: { title: 'menu.registry', icon: Container, order: 12, adminOnly: true, groupKey: 'system' } },
  // 系统设置放回侧栏，并作为「系统设置」分组的 tab 起点（order 最小 = 排在第一个）
  {
    path: '/settings', component: SettingsPage, auth: true,
    meta: {
      title: 'menu.settings', icon: Settings, order: 8, adminOnly: true,
      group: { key: 'system', label: 'menu.groups.system', icon: Settings, order: 8 },
    },
  },
  { path: '*', component: NotFound, auth: false, meta: { title: 'menu.notFound', hideInMenu: true } },
];

/**
 * 侧栏菜单：登录后可见的路由，按 order 排序。
 *
 * 分组规则（解决"菜单太多"的观感问题）：
 *   - 带 meta.group 的路由是一个分组的**代表入口**，菜单显示分组的 label/icon
 *   - 带 meta.groupKey 的路由说明它属于某个已有分组 → 不进菜单，只在页内 tab 出现
 * 这样 13 个路由收敛成 7 个菜单项，且 URL 全部保持不变（书签不会失效）。
 */
export const menuItems: MenuItem[] = (() => {
  const grouped = new Set<string>();
  const items: MenuItem[] = [];

  const sorted = routes
    .filter((route) => route.auth && !route.meta.hideInMenu)
    .sort((a, b) => {
      const orderA = a.meta.group?.order ?? a.meta.order ?? 0;
      const orderB = b.meta.group?.order ?? b.meta.order ?? 0;
      return orderA - orderB;
    });

  for (const route of sorted) {
    const { group, groupKey } = route.meta;
    // 属于某个分组的非代表路由：不占菜单位
    if (groupKey && !group) continue;
    if (group) {
      if (grouped.has(group.key)) continue;
      grouped.add(group.key);
      items.push({
        path: route.path,
        icon: group.icon ?? route.meta.icon,
        label: group.label,
        adminOnly: route.meta.adminOnly,
        groupKey: group.key,
      });
      continue;
    }
    items.push({
      path: route.path,
      icon: route.meta.icon,
      label: route.meta.title,
      adminOnly: route.meta.adminOnly,
    });
  }
  return items;
})();

/** 取某个分组下的所有页面（用于页内 tab 切换），按 order 排序 */
export function findGroupRoutes(groupKey: string): AppRoute[] {
  return routes
    .filter((route) => route.meta.groupKey === groupKey || route.meta.group?.key === groupKey)
    .sort((a, b) => (a.meta.order ?? 0) - (b.meta.order ?? 0));
}

/** 当前路径所属的分组标识（不在分组内返回 undefined） */
export function findGroupKey(pathname: string): string | undefined {
  const meta = findRouteMeta(pathname);
  return meta?.group?.key ?? meta?.groupKey;
}

/** 按路径查 meta（通配/未匹配返回 undefined，调用方自行兜底） */
export function findRouteMeta(pathname: string): RouteMeta | undefined {
  return routes.find((route) => route.path === pathname)?.meta;
}