import DashboardOutlined from "@mui/icons-material/DashboardOutlined";
import HistoryOutlined from "@mui/icons-material/HistoryOutlined";
import Inventory2Outlined from "@mui/icons-material/Inventory2Outlined";
import LoginOutlined from "@mui/icons-material/LoginOutlined";
import ManageAccountsOutlined from "@mui/icons-material/ManageAccountsOutlined";
import MenuOpenOutlined from "@mui/icons-material/MenuOpenOutlined";
import NotificationsNoneOutlined from "@mui/icons-material/NotificationsNoneOutlined";
import ReceiptLongOutlined from "@mui/icons-material/ReceiptLongOutlined";
import ShieldOutlined from "@mui/icons-material/ShieldOutlined";
import SettingsApplicationsOutlined from "@mui/icons-material/SettingsApplicationsOutlined";

export const navItems = [
  { id: "overview", code: "overview", label: "总览", path: "/overview", icon: DashboardOutlined },
  { id: "services", code: "services", label: "服务管理", path: "/services", icon: Inventory2Outlined },
  {
    id: "system",
    code: "system",
    label: "系统管理",
    icon: SettingsApplicationsOutlined,
    children: [
      { id: "system-users", code: "system-users", label: "用户管理", path: "/system/users", icon: ManageAccountsOutlined },
      { id: "system-roles", code: "system-roles", label: "角色配置", path: "/system/roles", icon: ShieldOutlined },
      { id: "system-menus", code: "system-menus", label: "菜单权限", path: "/system/menus", icon: MenuOpenOutlined }
    ]
  },
  {
    id: "logs",
    code: "logs",
    label: "日志审计",
    icon: HistoryOutlined,
    children: [
      { id: "logs-login", code: "logs-login", label: "登录日志", path: "/logs/login", icon: LoginOutlined },
      { id: "logs-operations", code: "logs-operations", label: "操作日志", path: "/logs/operations", icon: ReceiptLongOutlined }
    ]
  },
  {
    id: "notifications",
    code: "notifications",
    label: "通知中心",
    path: "/notifications",
    icon: NotificationsNoneOutlined
  }
];

const iconMap = {
  dashboard: DashboardOutlined,
  history: HistoryOutlined,
  inventory: Inventory2Outlined,
  login: LoginOutlined,
  menu: MenuOpenOutlined,
  notifications: NotificationsNoneOutlined,
  receipt: ReceiptLongOutlined,
  settings: SettingsApplicationsOutlined,
  shield: ShieldOutlined,
  users: ManageAccountsOutlined
};

export function mapBackendMenus(menus = []) {
  return menus.map((item) => ({
    id: item.code || String(item.id),
    code: item.code,
    label: item.label,
    path: item.path,
    icon: iconMap[item.icon] || MenuOpenOutlined,
    permissionCode: item.permissionCode,
    children: item.children?.length ? mapBackendMenus(item.children) : undefined
  }));
}

export function findNavItemById(id, items = navItems) {
  for (const item of items) {
    if (item.id === id) {
      return item;
    }

    if (item.children?.length) {
      const child = findNavItemById(id, item.children);

      if (child) {
        return child;
      }
    }
  }

  return null;
}

export function findNavItemByPath(pathname, items = navItems) {
  let fallback = null;

  for (const item of items) {
    if (item.path && pathname.startsWith(item.path)) {
      fallback = item;
    }

    if (item.children?.length) {
      const child = findNavItemByPath(pathname, item.children);
      if (child) {
        return child;
      }
    }
  }

  return fallback;
}