package com.supervision.service.impl;


import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.lang.Assert;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.supervision.model.GeBytearray;
import com.supervision.model.KgInfo;
import com.supervision.qanything.QanythingService;
import com.supervision.qanything.dto.ChatResult;
import com.supervision.qanything.dto.ResultWrapper;
import com.supervision.qanything.dto.SourceDTO;
import com.supervision.qanything.dto.UploadResult;
import com.supervision.service.GeBytearrayService;
import com.supervision.service.KGService;
import com.supervision.service.KgInfoService;
import com.supervision.vo.kg.ChatReqVo;
import com.supervision.vo.kg.ChatResVo;
import com.supervision.vo.kg.SourceKgInfo;
import com.supervision.vo.kg.UploadDocResVo;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.security.NoSuchAlgorithmException;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;

@Slf4j
@Service
@RequiredArgsConstructor
public class KGServiceImpl implements KGService {

    @Value("${youdao.qanthing.kbId}")
    private String kbId;

    private final QanythingService qanythingService;

    private final KgInfoService kgInfoService;

    private final GeBytearrayService geBytearrayService;


    @Override
    public ChatResVo chat(String question) throws NoSuchAlgorithmException {
        Assert.notEmpty(question, "问题不能为空");

        ArrayList<String> kbIds = CollUtil.newArrayList("KB6ada48988e694ad197af53cc0d1e4b78_240328", "KB403a6543629648a3a74b60be5707398f_240328");
        ResultWrapper<ChatResult> chat = qanythingService.chat(question, kbIds);
        if (!chat.isSuccess()) {
            log.info("Qanything 聊天失败,原因:{}",chat.getMsg());
            return ChatResVo.makeError();
        }
        ChatResult result = chat.getResult();
        if (Objects.isNull(result)){
            log.info("Qanything 聊天结果为空");
            return ChatResVo.makeError();
        }
        ChatResVo chatResVo = ChatResVo.makeSuccess(result.getResponse());
        if (CollUtil.isEmpty(result.getSource())){
            return chatResVo;
        }
        chatResVo.setSourceKgInfoList(qaSource2SourceKgInfo(result.getSource()));
        return chatResVo;
    }

    @Override
    public ChatResVo chat(ChatReqVo chatReqVo) throws NoSuchAlgorithmException {
        ChatResVo chat = this.chat(chatReqVo.getQuestion());
        if (!chat.isSuccess()
                ||CollUtil.isEmpty(chat.getSourceKgInfoList())
                || StrUtil.isBlank(chatReqVo.getLabel())){
            return chat;
        }
        List<SourceKgInfo> sourceKgInfoList = chat.getSourceKgInfoList().stream()
                .filter(sourceKgInfo -> chatReqVo.getLabel().equals(sourceKgInfo.getLabel())).collect(Collectors.toList());
        chat.setSourceKgInfoList(sourceKgInfoList);
        return  chat;
    }

    private List<SourceKgInfo> qaSource2SourceKgInfo(List<SourceDTO> sourceDTOList){
        List<SourceKgInfo> sourceKgInfoList = CollUtil.newArrayList();
        if (CollUtil.isEmpty(sourceDTOList)){
            return sourceKgInfoList;
        }
        // 根据fileId进行去重
        sourceDTOList = sourceDTOList.stream().filter(distinctPredicate(SourceDTO::getFileId)).collect(Collectors.toList());
        // qanything 中文件id与文件内容的映射
        Map<String, String> fileIdMapContent = sourceDTOList.stream().collect(Collectors.toMap(SourceDTO::getFileId, SourceDTO::getContent, (o, n) -> o));
        Set<String> qaFileId = sourceDTOList.stream().map(SourceDTO::getFileId).filter(Objects::nonNull).collect(Collectors.toSet());
        // 优先选择的文档id
        Set<String> preferFileIds = new HashSet<>();
        if (CollUtil.isNotEmpty(qaFileId)) {
            // 优先使用数据库中配置的信息
            List<KgInfo> preferKgInfoList = kgInfoService.lambdaQuery().in(KgInfo::getFileQaDocId, qaFileId).list();
            List<SourceKgInfo> sourceKgInfos = preferKgInfoList.stream().peek(kgInfo->preferFileIds.add(kgInfo.getFileQaDocId()))
                    .peek(kgInfo->{
                        if (StrUtil.isEmpty(kgInfo.getContent())){
                            kgInfo.setSummary(fileIdMapContent.get(kgInfo.getFileQaDocId()));
                        }
                    }).map(SourceKgInfo::kgInfo2SourceKgInfo)
                    .filter(source-> StrUtil.isNotEmpty(source.getSummary())).collect(Collectors.toList());
            sourceKgInfoList.addAll(sourceKgInfos);
        }
        // 数据库中未配置信息，则是使用Qanything返回的信息
        List<SourceKgInfo> candidateKgInfoList = sourceDTOList.stream().filter(source -> !preferFileIds.contains(source.getFileId()))
                .map(SourceKgInfo::sourceDTO2SourceKgInfo).collect(Collectors.toList());
        sourceKgInfoList.addAll(candidateKgInfoList);
        return sourceKgInfoList;
    }

    @Override
    public IPage<KgInfo> hotKG(Page<KgInfo> page) {

        return kgInfoService.lambdaQuery().eq(KgInfo::getHotFlag,1).page(page);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void uploadDoc(KgInfo kgInfo,String kbId, File file) throws IOException {

        // 保存到qanthing中
        try {
            ResultWrapper<List<UploadResult>> resultWrapper = qanythingService.uploadDoc(kbId, file);
            if (!resultWrapper.isSuccess() || CollUtil.isEmpty(resultWrapper.getResult())){
                log.error("Qanything 上传失败,原因:{}",resultWrapper.getMsg());
                return;
            }
            List<UploadResult> result = resultWrapper.getResult();
            if (CollUtil.size(result)>1){
                log.warn("Qanything 上传成功,但是返回结果不止一个,返回结果:{}",result);
            }
            kgInfo.setFileQaDocId(CollUtil.getFirst(result).getFileId());
        } catch (NoSuchAlgorithmException e) {
            log.error("Qanything 签名失败",e);
            throw new RuntimeException(e);
        }

        //保存到数据库中
        GeBytearray geBytearray = new GeBytearray();
        geBytearray.setFileName(file.getName());
        geBytearray.setFileSize(file.length());
        geBytearray.setContent(IoUtil.readBytes(Files.newInputStream(file.toPath())));
        geBytearrayService.save(geBytearray);

        // 保存文件信息
        kgInfo.setFileByteId(geBytearray.getId());
        kgInfoService.save(kgInfo);

    }

    @Override
    public UploadDocResVo uploadDoc(String kbId, MultipartFile multipartFile) {


        return null;

    }

    public static <K> Predicate<K> distinctPredicate(Function<K, Object> function) {
        ConcurrentHashMap<Object, Boolean> map = new ConcurrentHashMap<>();
        // 根据key进行去重,并排除为null的数据
        return t -> null == map.putIfAbsent(function.apply(t), true);

    }
}