/**
 * 行业技能词云 hook：按行业拉取技能词数据，统一管理 loading / error / refresh。
 * 切换行业时自动重新取数（fetcher 依赖 industry）；
 * 搜索关键词的过滤规则放在接口层（filterSkillWords），这里只编排状态。
 */
import { useCallback, useState } from 'react';
import { fetchSkillCloud, filterSkillWords } from '../api';
import type { SkillCloudData, SkillWord } from '../types';
import { useAsyncData } from './useAsyncData';

export function useSkillCloud(initialIndustry = '互联网/IT') {
  const [industry, setIndustry] = useState(initialIndustry);
  const [keyword, setKeyword] = useState('');
  const fetcher = useCallback(() => fetchSkillCloud(industry), [industry]);

  const { data, loading, error, refresh } = useAsyncData(fetcher);
  const cloud = (data as SkillCloudData | null) ?? null;

  /** 按关键词过滤后的技能词；未输入关键词时即全量 */
  const words: SkillWord[] = cloud ? filterSkillWords(cloud.words, keyword) : [];

  return {
    industry,
    setIndustry,
    cloud,
    /** 搜索关键词 */
    keyword,
    setKeyword,
    /** 过滤后的技能词（渲染词云用） */
    words,
    /** 有关键词但一条没命中 */
    isEmpty: cloud !== null && words.length === 0,
    loading,
    error,
    refresh,
  };
}