package com.example.xiaoshiweixinback.service.common;

import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch._types.InlineScript;
import co.elastic.clients.elasticsearch._types.Script;
import co.elastic.clients.elasticsearch._types.aggregations.Aggregate;
import co.elastic.clients.elasticsearch._types.aggregations.Aggregation;
import co.elastic.clients.elasticsearch._types.aggregations.AggregationBuilders;
import co.elastic.clients.elasticsearch._types.query_dsl.Query;
import co.elastic.clients.elasticsearch._types.query_dsl.QueryBuilders;
import co.elastic.clients.elasticsearch.core.SearchRequest;
import co.elastic.clients.elasticsearch.core.SearchResponse;
import co.elastic.clients.elasticsearch.core.search.FieldCollapse;
import co.elastic.clients.elasticsearch.core.search.Hit;
import co.elastic.clients.json.JsonData;
import com.example.xiaoshiweixinback.business.common.base.Records;
import com.example.xiaoshiweixinback.business.utils.BeanUtil;
import com.example.xiaoshiweixinback.business.utils.ToolUtil;
import com.example.xiaoshiweixinback.business.utils.parseQueryToTree.expressManager;
import com.example.xiaoshiweixinback.business.utils.parseQueryToTree.operateNode;
import com.example.xiaoshiweixinback.business.utils.parseQueryToTree.treeNode;
import com.example.xiaoshiweixinback.domain.Product;
import com.example.xiaoshiweixinback.domain.es.PatentVector;
import com.example.xiaoshiweixinback.entity.dto.esPicture.EsPictureNoDTO;
import com.example.xiaoshiweixinback.entity.dto.esPicture.EsPatentVectorDTO;
import com.example.xiaoshiweixinback.entity.dto.searchRecord.AddSearchRecordDTO;
import com.example.xiaoshiweixinback.entity.product.ProductIdDTO;
import com.example.xiaoshiweixinback.entity.vo.esPicture.EsPictureNoVo;
import com.example.xiaoshiweixinback.entity.vo.esPicture.EsPatentVectorVo;
import com.example.xiaoshiweixinback.mapper.ProductMapper;
import com.example.xiaoshiweixinback.service.SearchRecordService;
import com.example.xiaoshiweixinback.service.importPatent.FormatQueryService;
import lombok.RequiredArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.io.File;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.stream.Collectors;

@Service
@RequiredArgsConstructor(onConstructor_ = {@Lazy})
public class EsDenseVectorService {

    private final ElasticsearchClient client;

    @Autowired
    private FormatQueryService formatQueryService;

    @Autowired
    private GetVectorService getVectorService;

    @Autowired
    private SearchRecordService searchRecordService;

    @Autowired
    private ProductMapper productMapper;

    /**
     * 根据图片排序获取列表
     *
     * @param dto
     * @return
     * @throws IOException
     */
    @Transactional(propagation = Propagation.REQUIRED, rollbackFor = Throwable.class)
    public Records getPatentVectors(EsPatentVectorDTO dto,File file) throws Exception {
        Long pageNum = dto.getPageNum();
        Long pageSize = dto.getPageSize();

        SearchRequest.Builder builder = new SearchRequest.Builder();
        //设置查询索引
        builder.index("patent_vector");
        Query q = null;
        String condition = this.appendCondition(dto.getProductId(), dto.getKey());
        if (StringUtils.isNotEmpty(condition)) {
            //1. 解析检索条件
            treeNode tree = expressManager.getInstance().Parse(condition, false);
            //2. 从es中检索数据
            q = formatQueryService.EsQueryToQuery((operateNode) tree, "patentVector", null);
        }
        //获取图片向量
        List<Float> imageList = new ArrayList<>();
        List<String> stringList = new ArrayList<>();
        if (file != null && file.exists() && file.length() != 0) {
            stringList = getVectorService.getVectorByFile(file);
        } else if (StringUtils.isNotEmpty(dto.getDescription())) {
            stringList = getVectorService.getVectorByText(dto.getDescription());
        }
        stringList.forEach(item -> {
            Float a = Float.parseFloat(item);
            imageList.add(a);
        });
        if (!CollectionUtils.isEmpty(imageList)) {
            String source = "cosineSimilarity(params.queryVector, 'my_vector') + 1.0";
            InlineScript inlineScript = InlineScript.of(i -> i.lang("painless").params("queryVector", JsonData.of(imageList)).source(source));
            Script script = Script.of(i -> i.inline(inlineScript));
            Query query = null;
            if (q != null) {
                Query finalQ = q;
                query = QueryBuilders.scriptScore(i -> i.script(script)
                        .query(finalQ));
            } else {
                query = QueryBuilders.scriptScore(i -> i.script(script)
                        .query(org.springframework.data.elasticsearch.client.elc.QueryBuilders.matchAllQueryAsQuery()));
            }
            builder.query(query);
        } else {
            builder.query(q);
        }
        //根据申请号去重
        FieldCollapse collapse = FieldCollapse.of(i -> i.field("app_no"));
        builder.collapse(collapse);
        //统计总数
        Aggregation aggregation = AggregationBuilders.cardinality(i -> i.field("app_no"));
        builder.aggregations("count", aggregation);

        //分页
        if (pageNum != null && pageSize != null && pageNum > 0 && pageSize > 0) {
            builder.from((pageNum.intValue() - 1) * pageSize.intValue()).size(pageSize.intValue());
        }

        //解除最大条数限制
        builder.trackTotalHits(i -> i.enabled(true));
        SearchResponse<PatentVector> response = client.search(builder.build(), PatentVector.class);
        List<Hit<PatentVector>> hits = response.hits().hits();
        List<EsPatentVectorVo> vectorVos = new ArrayList<>();
        Double fixedScore = 1.7d;
        for (Hit<PatentVector> hit : hits) {
            Double score = hit.score();
            if (score > fixedScore) {
                PatentVector vector = hit.source();
                EsPatentVectorVo vectorVo = new EsPatentVectorVo();
                BeanUtil.copy(vector, vectorVo);
                vectorVos.add(vectorVo);
            }
        }

        Aggregate aggregate = response.aggregations().get("count");
        long total = aggregate.cardinality().value();
        Records records = new Records();
        records.setCurrent(pageNum);
        records.setSize(pageSize);
        records.setData(vectorVos);
        long count = total <= vectorVos.size() ? total : vectorVos.size();
        records.setTotal(count);

        //添加检索历史
        AddSearchRecordDTO recordDTO = new AddSearchRecordDTO();
        recordDTO.setProductId(dto.getProductId());
        recordDTO.setDescription(dto.getDescription());
        recordDTO.setGuid(file.getPath());
        recordDTO.setSearchCondition(condition);
        recordDTO.setAllNum(Integer.parseInt(String.valueOf(count)));
        recordDTO.setSearchTime(new Date());
        searchRecordService.addSearchRecord(recordDTO);
        return records;
    }

    /**
     * 根据专利号获取相关图片
     * @param noDTO
     * @return
     * @throws IOException
     */
    public List<EsPictureNoVo> getPictureByNo(EsPictureNoDTO noDTO) throws Exception {
        List<EsPictureNoVo> pictureNoVos = new ArrayList<>();
        SearchRequest.Builder builder = new SearchRequest.Builder();
        //设置查询索引
        builder.index("patent_vector");
        Query query = QueryBuilders.term(i -> i.field("app_no").value(noDTO.getAppNo()));
        builder.query(query);
        builder.size(100);
        SearchResponse<PatentVector> response = client.search(builder.build(), PatentVector.class);
        List<Hit<PatentVector>> hits = response.hits().hits();
        for (Hit<PatentVector> hit : hits) {
            PatentVector vector = hit.source();
            EsPictureNoVo noVo = new EsPictureNoVo();
            noVo.setGuid(vector.getGuid());
            noVo.setImageIndex(vector.getImageIndex());
            pictureNoVos.add(noVo);
        }
        return pictureNoVos.stream().sorted(Comparator.comparing(EsPictureNoVo::getImageIndex)).collect(Collectors.toList());
    }

    /**
     * 拼接检索条件
     *
     * @param productId
     * @param keyword
     * @return
     * @throws Exception
     */
    public String appendCondition(Integer productId, String keyword) {
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat format1 = new SimpleDateFormat("yyyy");


        String condition = "";
        String searchCondition = "";
        if (productId != null) {
            Product product = productMapper.selectById(productId);
            searchCondition = product.getSearchCondition();

            Date now = new Date();
            String nowFormat = format.format(now);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(now);
            calendar.add(Calendar.YEAR, -3);
            Date beforeDate = calendar.getTime();
            String agoFormat = format1.format(beforeDate) + "0101";
            String s = agoFormat + "~" + nowFormat;
            searchCondition = searchCondition + " AND " + "AD = " + "(" + s + ")";
        }
        if (StringUtils.isNotEmpty(searchCondition)) {
            if (StringUtils.isNotEmpty(keyword)) {
                String key = keyword.replaceAll("[，。、；,./;]", " OR ");
                condition = "TI = " + "(" + key + ")" + " AND " + searchCondition;
            } else {
                condition = searchCondition;
            }
        } else {
            //获取关键词
            if (StringUtils.isNotEmpty(keyword)) {
//        String key = dto.getKey().replaceAll("[，。、；,./;\\s]"," OR ");
                String key = keyword.replaceAll("[，。、；,./;]", " OR ");
                condition = "TI = " + "(" + key + ")";
            }
        }
        return condition;
    }
}