"use client";

/**
 * Topbar domain API
 *
 * 涵盖：useNotificationBell、useCurrentUser、useGlobalSearch
 *
 * widget 通过 `import { useNotificationBell } from "@/lib/api/topbar"` 调用，
 * 不再各自内嵌 gql/接口/手写类型。
 *
 * 注意：useNotificationBell 与 universal.useNotifications（分页通知列表）语义不同，
 * 前者是 topbar 铃铛 widget 专用（按 limit 取最近 N 条），后者是分页查询。
 *
 * 关联：spec §2.2
 */
import {
  GET_NOTIFICATIONS_DOC,
  GET_CURRENT_USER_DOC,
  SEARCH_DOC,
} from "@/lib/api/operations/topbar.graphql";
import { useWidgetQuery } from "@/lib/useWidgetQuery";
import type { UseQueryResult } from "./types";

// ===== 领域模型类型 =====

export interface NotificationItem {
  id: string;
  title: string;
}

export interface CurrentUser {
  id: string;
  name: string;
  email: string;
  role: string;
}

export interface SearchResult {
  id: string;
  type: string;
  title: string;
  subtitle: string;
}

// ===== 内部 Query 类型 =====

interface NotificationsQueryData {
  notifications: NotificationItem[];
}

type NotificationsQueryVars = {
  limit: number;
};

interface CurrentUserQueryData {
  me: CurrentUser | null;
}

type CurrentUserQueryVars = Record<string, never>;

interface SearchQueryData {
  search: SearchResult[];
}

type SearchQueryVars = {
  keyword: string;
  limit: number;
};

// ===== Hooks =====

/**
 * 查询通知列表（topbar 铃铛 widget 专用，按 limit 取最近 N 条）。
 *
 * 关联：portal-shell spec §5.6 统一 Hook
 */
export function useNotificationBell(
  limit: number,
): UseQueryResult<NotificationItem[]> {
  const result = useWidgetQuery<NotificationsQueryData, NotificationsQueryVars>(
    GET_NOTIFICATIONS_DOC,
    { limit },
  );

  return {
    data: result.data?.notifications,
    loading: result.loading,
    error: result.error,
    refetch: result.refetch,
  };
}

/**
 * 查询当前登录用户（iam 子图 me 字段）。
 *
 * 关联：portal-shell spec §5.6 统一 Hook
 */
export function useCurrentUser(): UseQueryResult<CurrentUser | null> {
  const result = useWidgetQuery<CurrentUserQueryData, CurrentUserQueryVars>(
    GET_CURRENT_USER_DOC,
    {},
  );

  return {
    data: result.data?.me,
    loading: result.loading,
    error: result.error,
    refetch: result.refetch,
  };
}

/**
 * 全局搜索。
 *
 * `keyword` 为空时不发起查询（enabled: false），避免无效请求。
 *
 * 关联：portal-shell spec §5.6 统一 Hook
 */
export function useGlobalSearch(
  keyword: string,
  limit: number,
): UseQueryResult<SearchResult[]> {
  const result = useWidgetQuery<SearchQueryData, SearchQueryVars>(
    SEARCH_DOC,
    { keyword, limit },
    { enabled: keyword.length > 0 },
  );

  return {
    data: result.data?.search,
    loading: result.loading,
    error: result.error,
    refetch: result.refetch,
  };
}