import { useState, useCallback } from 'react';
import { message } from 'antd';
import type { RetrieveRecord, RetrievalModel } from '~/api/dify-dataset/type';
import { retrieveDataset } from '~/api/dify-dataset/api/segmentApi';
import { DIFY_CONFIG } from '~/config/api-config';
import type { SearchMethod } from '~/types/dify-dataset-manager/retrieve-test';

/**
 * 构建完整的 retrieval_model 参数（匹配 Dify API 规范）
 * 根据检索方式启用 Reranking（语义搜索和混合搜索需要启用）
 */
function buildRetrievalModel(
    searchMethod: SearchMethod,
    topK: number,
    scoreThresholdEnabled: boolean,
    scoreThreshold: number
): RetrievalModel {
    // 语义搜索和混合搜索需要启用 Reranking
    const needReranking = searchMethod === 'semantic_search' || searchMethod === 'hybrid_search';

    return {
        search_method: searchMethod,
        reranking_enable: needReranking,
        reranking_mode: needReranking ? null : null,
        reranking_model: {
            reranking_provider_name: DIFY_CONFIG.rerankingProviderName,
            reranking_model_name: DIFY_CONFIG.rerankingModelName,
        },
        weights: null,
        top_k: topK,
        score_threshold_enabled: scoreThresholdEnabled,
        score_threshold: scoreThresholdEnabled ? scoreThreshold : null,
    };
}

/**
 * 召回测试状态管理 Hook
 */
export function useRetrieveTest(datasetId: string) {
    const [searchQuery, setSearchQuery] = useState('');
    const [retrieveResults, setRetrieveResults] = useState<RetrieveRecord[]>([]);
    const [retrieving, setRetrieving] = useState(false);
    // 默认使用语义搜索
    const [searchMethod, setSearchMethod] = useState<SearchMethod>('semantic_search');
    const [topK, setTopK] = useState<number>(5);
    // Score 阈值相关状态
    const [scoreThresholdEnabled, setScoreThresholdEnabled] = useState(false);
    const [scoreThreshold, setScoreThreshold] = useState<number>(0.5);

    /**
     * 执行检索
     */
    const handleRetrieve = useCallback(async () => {
        if (!searchQuery.trim()) {
            message.warning('请输入检索关键词');
            return;
        }

        if (!datasetId) {
            message.warning('知识库ID不存在');
            return;
        }

        setRetrieving(true);
        try {
            const retrievalModel = buildRetrievalModel(searchMethod, topK, scoreThresholdEnabled, scoreThreshold);
            console.log('[Hook] 检索参数:', { datasetId, query: searchQuery, retrievalModel });

            const response = await retrieveDataset(datasetId, searchQuery, retrievalModel);
            setRetrieveResults(response.records || []);
            if (response.records?.length === 0) {
                message.info('未找到匹配的结果');
            }
        } catch (err: any) {
            console.error('检索失败:', err);
            message.error(err.message || '检索失败');
        } finally {
            setRetrieving(false);
        }
    }, [datasetId, searchQuery, searchMethod, topK, scoreThresholdEnabled, scoreThreshold]);

    return {
        // 状态
        searchQuery,
        setSearchQuery,
        retrieveResults,
        retrieving,
        searchMethod,
        setSearchMethod,
        topK,
        setTopK,
        scoreThresholdEnabled,
        setScoreThresholdEnabled,
        scoreThreshold,
        setScoreThreshold,

        // 方法
        handleRetrieve,
    };
}

export type UseRetrieveTestReturn = ReturnType<typeof useRetrieveTest>;