import { reactive, toRaw } from "vue";

// 分页钩子函数
interface Options {
  page?: number;
  size?: number;
  limit?: number;
  fetchFun: (_arg: any) => Promise<any>;
  params?: Record<any, any>;
  firstLoading?: boolean;
}

export function usePaging(options: Options) {
  const {
    page = 1,
    size = 15,
    fetchFun,
    params = {},
    firstLoading = false,
  } = options;
  // 记录分页初始参数
  const paramsInit: Record<any, any> = Object.assign({}, toRaw(params));
  // 分页数据
  const pager = reactive({
    page,
    size,
    loading: firstLoading,
    count: 0,
    lists: [] as any[],
    extend: {} as Record<string, any>,
  });
  // 请求分页接口
  const getLists = () => {
    pager.loading = true;
    return fetchFun({
      page_no: pager.page,
      page_size: pager.size,
      ...params,
    })
      .then((res: any) => {
        pager.count = res?.count;
        res.lists ? (pager.lists = res.lists) : (pager.lists = res.data);
        if(pager.lists==[]||pager.lists==null||pager.lists==undefined)res.list ? pager.lists = res.list: null;
        // pager.lists = res?.lists
        pager.extend = res?.extend;
        return Promise.resolve(res);
      })
      .catch((err: any) => {
        return Promise.reject(err);
      })
      .finally(() => {
        pager.loading = false;
      });
  };
  // 重置为第一页
  const resetPage = () => {
    pager.page = 1;
    getLists();
  };
  // 重置参数
  const resetParams = () => {
    Object.keys(paramsInit).forEach((item) => {
      params[item] = paramsInit[item];
    });
    getLists();
  };
  return {
    pager,
    getLists,
    resetParams,
    resetPage,
  };
}