/**
 * 岗位列表数据 hook（排序/筛选/搜索/分页均在接口层 fetchJobList 完成）
 */
import { useCallback, useMemo } from 'react';
import { fetchJobList } from '../api';
import type { Job, JobListParams } from '../types';
import { useAsyncData } from './useAsyncData';

export function useJobList(params?: Partial<JobListParams>) {
  const sortBy = params?.sortBy ?? 'comprehensive';
  const keyword = params?.keyword;
  const industry = params?.industry;
  const city = params?.city;
  const salary = params?.salary;
  const experience = params?.experience;
  const education = params?.education;
  const page = params?.page;
  const pageSize = params?.pageSize;

  // fetcher 引用需稳定：以基础类型为依赖，避免 useAsyncData 反复触发
  const fetcher = useCallback(
    () =>
      fetchJobList({
        sortBy,
        keyword,
        industry,
        city,
        salary,
        experience,
        education,
        page,
        pageSize,
      }),
    [sortBy, keyword, industry, city, salary, experience, education, page, pageSize],
  );

  const { data, loading, error, refresh } = useAsyncData(fetcher);

  const jobs = useMemo<Job[]>(() => data?.jobs ?? [], [data]);
  const total = data?.total ?? 0;
  // 空状态：加载完成且无错误、但列表为空
  const isEmpty = !loading && !error && jobs.length === 0;

  return { jobs, total, loading, error, refresh, isEmpty };
}