/**
 * 企业端人才推荐数据 hook。
 * Tab 与搜索词状态放在这里，过滤规则由接口层（filterTalentCandidates）给出，
 * 页面只把点击/输入转成 setTab / setKeyword 再渲染 candidates。
 */
import { useCallback, useState } from 'react';
import { fetchTalentRecommendation, filterTalentCandidates } from '../api';
import type { TalentCandidate, TalentRecommendation } from '../types';
import { useAsyncData } from './useAsyncData';

export function useTalentRecommendation() {
  const fetcher = useCallback(
    async (): Promise<TalentRecommendation> => fetchTalentRecommendation(),
    [],
  );
  const { data, loading, error, refresh } = useAsyncData(fetcher);

  const [activeTab, setActiveTab] = useState('all');
  const [keyword, setKeyword] = useState('');

  const recommendation = data ?? null;
  /** 按当前 Tab + 关键词过滤后的候选人 */
  const candidates: TalentCandidate[] = recommendation
    ? filterTalentCandidates(recommendation.candidates, activeTab, keyword)
    : [];

  /** 有关键词但一条没命中 */
  const isEmptySearch = recommendation !== null && keyword.trim() !== '' && candidates.length === 0;

  return {
    recommendation,
    activeTab,
    setActiveTab,
    keyword,
    setKeyword,
    candidates,
    isEmptySearch,
    loading,
    error,
    refresh,
  };
}