package com.simuwang.manage.service.competition;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.collection.ListUtil;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.exceptions.ExceptionUtil;
import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.StrUtil;
import com.simuwang.base.common.conts.DateConst;
import com.simuwang.base.event.CalcFundRankEventDO;
import com.simuwang.base.mapper.*;
import com.simuwang.base.pojo.FundInitAndEndNavDTO;
import com.simuwang.base.pojo.dos.*;
import com.simuwang.base.pojo.dto.FundScoreRankDTO;
import com.smppw.common.pojo.dto.DateValue;
import com.smppw.utils.BigDecimalUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class CalcFundRankService {

    private final static Logger log = LoggerFactory.getLogger(CalcFundRankService.class);

    private final FundIndicatorMapper fundIndicatorMapper;
    private final RcCompetitionApplyMapper competitionApplyMapper;
    private final FundRatingRuleMapper fundRatingRuleMapper;
    private final FundInfoMapper fundInfoMapper;
    private final RcCompetitionResultMapper rcCompetitionResultMapper;

    public CalcFundRankService(FundIndicatorMapper fundIndicatorMapper, RcCompetitionApplyMapper competitionApplyMapper,
                               FundRatingRuleMapper fundRatingRuleMapper, FundInfoMapper fundInfoMapper,
                               RcCompetitionResultMapper rcCompetitionResultMapper) {
        this.fundIndicatorMapper = fundIndicatorMapper;
        this.competitionApplyMapper = competitionApplyMapper;
        this.fundRatingRuleMapper = fundRatingRuleMapper;
        this.fundInfoMapper = fundInfoMapper;
        this.rcCompetitionResultMapper = rcCompetitionResultMapper;
    }

    public void calFundRank(CalcFundRankEventDO calcFundRankEventDO) {
        Integer competitionId = calcFundRankEventDO.getCompetitionId();
        String period = calcFundRankEventDO.getPeriod();
        List<FundIndicatorDO> fundIndicatorList = fundIndicatorMapper.queryByPeriod(competitionId, period);
        if (CollUtil.isEmpty(fundIndicatorList)) {
            return;
        }
        // 基金策略
        List<RcCompetitionApplyDO> competitionApplyDOList = competitionApplyMapper.queryByCompetitionId(competitionId);
        Map<String, Integer> fundIdStrategyMap = competitionApplyDOList.stream().collect(Collectors.toMap(RcCompetitionApplyDO::getFundId, RcCompetitionApplyDO::getStrategy));
        // 排名规则
        List<FundRatingRuleDO> ratingRuleDOList = fundRatingRuleMapper.queryByCompetitionId(competitionId);
        Map<Integer, List<FundRatingRuleDO>> strategyRatingRuleMap = ratingRuleDOList.stream().collect(Collectors.groupingBy(FundRatingRuleDO::getStrategyId));
        // 基金按照策略进行分组
        Map<Integer, List<FundIndicatorDO>> strategyIndicatorMap = fundIndicatorList.stream().collect(Collectors.groupingBy(k -> fundIdStrategyMap.get(k.getFundId())));
        List<FundScoreRankDTO> fundScoreRankDTOList = CollUtil.newArrayList();
        for (Map.Entry<Integer, List<FundIndicatorDO>> strategyIndicatorEntry : strategyIndicatorMap.entrySet()) {
            try {
                List<FundIndicatorDO> indicatorDOList = strategyIndicatorEntry.getValue();
                Integer strategyId = strategyIndicatorEntry.getKey();
                List<FundRatingRuleDO> ruleDOList = strategyRatingRuleMap.get(strategyId);
                // 计算综合得分和排名
                List<FundScoreRankDTO> scoreRankDTOList = calculateScoreAndRank(indicatorDOList, ruleDOList);
                scoreRankDTOList.forEach(e -> e.setStrategyId(strategyId));
                fundScoreRankDTOList.addAll(scoreRankDTOList);
            } catch (Exception e) {
                log.error("计算综合得分和排名出错 -> 堆栈信息:{}", ExceptionUtil.stacktraceToString(e));
            }
        }
        if (CollUtil.isEmpty(fundScoreRankDTOList)) {
            log.info("基金综合得分和排名为空，无需绘制榜单结果表");
            return;
        }
        // 绘制榜单结果表
        try {
            saveCompetitionResult(competitionId, period, fundIndicatorList, fundScoreRankDTOList, competitionApplyDOList, calcFundRankEventDO.getFundIdNavMap());
        } catch (Exception e) {
            log.error("绘制榜单结果表出错 -> 堆栈信息:{}", ExceptionUtil.stacktraceToString(e));
        }
    }

    private void saveCompetitionResult(Integer competitionId, String period, List<FundIndicatorDO> fundIndicatorList, List<FundScoreRankDTO> fundScoreRankDTOList,
                                       List<RcCompetitionApplyDO> competitionApplyDOList, Map<String, List<DateValue>> fundIdNavMap) {
        // 基金信息和机构信息
        List<FundAndCompanyInfoDO> fundCompanyInfoDOList = fundInfoMapper.queryFundAndTrustByFundId(competitionId);
        Map<String, FundAndCompanyInfoDO> fundIdInfoMap = fundCompanyInfoDOList.stream().collect(Collectors.toMap(FundAndCompanyInfoDO::getFundId, v -> v));
        // 基金的期初期末净值信息
        Map<String, FundInitAndEndNavDTO> fundIdInitAndEndNavMap = getFundInitAndEndNav(fundIdNavMap);
        // 榜单数据
        Map<String, FundScoreRankDTO> fundIdScoreRankMap = fundScoreRankDTOList.stream().collect(Collectors.toMap(FundScoreRankDTO::getFundId, v -> v));
        Map<String, FundIndicatorDO> fundIdIndicatorMap = fundIndicatorList.stream().collect(Collectors.toMap(FundIndicatorDO::getFundId, v -> v));
        List<RcCompetitionResultDO> competitionResultDOList = convertToCompetitionResultDO(competitionId, period, fundIdIndicatorMap, fundIdInfoMap, fundIdInitAndEndNavMap, fundIdScoreRankMap);
        if (CollUtil.isNotEmpty(competitionResultDOList)) {
            List<List<RcCompetitionResultDO>> partition = ListUtil.partition(competitionResultDOList, 500);
            partition.forEach(rcCompetitionResultMapper::batchInsertOrUpdate);
        }
    }

    private List<FundScoreRankDTO> calculateScoreAndRank(List<FundIndicatorDO> indicatorDOList, List<FundRatingRuleDO> ruleDOList) {
        List<FundScoreRankDTO> scoreRankDTOList = CollUtil.newArrayList();
        if (CollUtil.isEmpty(indicatorDOList) || CollUtil.isEmpty(ruleDOList)) {
            return scoreRankDTOList;
        }
        // 1.按照规则计算综合得分
        Map<String, BigDecimal> fundIdScoreMap = MapUtil.newHashMap(indicatorDOList.size());
        List<Map<String, String>> indicatorMapList = indicatorDOList.stream().map(this::convertToMap).toList();
        for (FundRatingRuleDO ratingRuleDo : ruleDOList) {
            String indicatorId = ratingRuleDo.getIndicatorId();
            BigDecimal weight = ratingRuleDo.getWeight();
            Integer ratingType = ratingRuleDo.getRatingType();
            // 参与评分的指标总数
            int total = (int) indicatorMapList.stream().map(e -> e.get(indicatorId)).filter(StrUtil::isNotBlank).count();
            if (total == 0) {
                continue;
            }
            for (Map<String, String> indicatorMap : indicatorMapList) {
                String fundId = indicatorMap.get("fundId");
                String indicatorValue = indicatorMap.get(indicatorId);
                if (StrUtil.isBlank(indicatorValue)) {
                    continue;
                }
                // 计算单个指标排名(从小到大 或 从大到小 排名)
                int rank;
                if (ratingType == 1) {
                    rank = (int) indicatorMapList.stream().map(e -> e.get(indicatorId))
                            .filter(StrUtil::isNotBlank).map(Double::valueOf).filter(e -> e.compareTo(Double.valueOf(indicatorValue)) > 0).count() + 1;
                } else {
                    rank = (int) indicatorMapList.stream().map(e -> e.get(indicatorId))
                            .filter(StrUtil::isNotBlank).map(Double::valueOf).filter(e -> e.compareTo(Double.valueOf(indicatorValue)) < 0).count() + 1;
                }
                // 排名得分 = [100-100*(绝对排名-1)/(总数-1)] * 权重
                double indicatorRank = total == 1 ? 100 : 100 - (100.0 * (rank - 1) / (total - 1));
                BigDecimal score = BigDecimalUtils.multiply(BigDecimal.valueOf(indicatorRank), weight);
                if (fundIdScoreMap.containsKey(fundId)) {
                    score = BigDecimalUtils.add(fundIdScoreMap.get(fundId), score);
                }
                fundIdScoreMap.put(fundId, score);
            }
        }

        // 2.计算排名
        List<Map.Entry<String, BigDecimal>> list = new ArrayList<>(fundIdScoreMap.entrySet());
        // 按照BigDecimal值降序排序
        list.sort((o1, o2) -> o2.getValue().compareTo(o1.getValue()));
        int rank = 1;
        for (Map.Entry<String, BigDecimal> entry : list) {
            FundScoreRankDTO dto = new FundScoreRankDTO(entry.getKey(), null, entry.getValue(), rank++);
            scoreRankDTOList.add(dto);
        }
        return scoreRankDTOList;
    }

    private Map<String, FundInitAndEndNavDTO> getFundInitAndEndNav(Map<String, List<DateValue>> fundIdNavMap) {
        Map<String, FundInitAndEndNavDTO> fundIdInitAndEndNavMap = MapUtil.newHashMap();
        for (Map.Entry<String, List<DateValue>> fundIdNavEntry : fundIdNavMap.entrySet()) {
            String fundId = fundIdNavEntry.getKey();
            List<DateValue> dateValueList = fundIdNavEntry.getValue();
            if (CollUtil.isEmpty(dateValueList) || dateValueList.size() == 1) {
                continue;
            }
            FundInitAndEndNavDTO initAndEndNavDTO = new FundInitAndEndNavDTO();
            initAndEndNavDTO.setFundId(fundId);
            DateValue maxNav = dateValueList.stream().max(Comparator.comparing(DateValue::getDate)).orElse(null);
            DateValue minNav = dateValueList.stream().min(Comparator.comparing(DateValue::getDate)).orElse(null);
            if (minNav != null) {
                initAndEndNavDTO.setStartDate(minNav.getDate());
                initAndEndNavDTO.setStartCumulativeNavWithdrawal(minNav.getCumulativeNavWithdrawal());
            }
            if (maxNav != null) {
                initAndEndNavDTO.setEndDate(maxNav.getDate());
                initAndEndNavDTO.setEndCumulativeNavWithdrawal(maxNav.getCumulativeNavWithdrawal());
            }
            fundIdInitAndEndNavMap.put(fundId, initAndEndNavDTO);
        }
        return fundIdInitAndEndNavMap;
    }

    private List<RcCompetitionResultDO> convertToCompetitionResultDO(Integer competitionId, String period, Map<String, FundIndicatorDO> fundIdIndicatorMap, Map<String, FundAndCompanyInfoDO> fundIdInfoMap,
                                                                     Map<String, FundInitAndEndNavDTO> fundIdInitAndEndNavMap, Map<String, FundScoreRankDTO> fundIdScoreRankMap) {
        List<RcCompetitionResultDO> competitionResultDOList = CollUtil.newArrayList();
        for (Map.Entry<String, FundAndCompanyInfoDO> fundCompanyInfoEntry : fundIdInfoMap.entrySet()) {
            String fundId = fundCompanyInfoEntry.getKey();
            RcCompetitionResultDO resultDO = new RcCompetitionResultDO();
            resultDO.setCompetitionId(competitionId);
            resultDO.setPriod(period);
            FundAndCompanyInfoDO fundAndCompanyInfoDO = fundCompanyInfoEntry.getValue();
            resultDO.setFundId(fundId);
            resultDO.setStrategy(fundAndCompanyInfoDO.getStrategyId());
            resultDO.setFundRegisterNumber(fundAndCompanyInfoDO.getRegisterNumber());
            resultDO.setFundName(fundAndCompanyInfoDO.getFundName());
            resultDO.setFundShortName(fundAndCompanyInfoDO.getFundShortName());
            resultDO.setCompanyId(fundAndCompanyInfoDO.getCompanyId());
            resultDO.setCompanyName(fundAndCompanyInfoDO.getCompanyName());
            resultDO.setCompanyShortName(fundAndCompanyInfoDO.getCompanyShortName());
            resultDO.setCompanyRegisterNumber(fundAndCompanyInfoDO.getCompanyRegisterNumber());
            resultDO.setCompanyScale(fundAndCompanyInfoDO.getCompanyScale());
            resultDO.setIsOpenAccount(fundAndCompanyInfoDO.getIsOpenAccount());
            resultDO.setIsOpenAccount2(fundAndCompanyInfoDO.getIsOpenAccount2());

            FundScoreRankDTO fundScoreRankDTO = fundIdScoreRankMap.get(fundId);
            if (fundScoreRankDTO != null) {
                resultDO.setRank(fundScoreRankDTO.getRank());
                resultDO.setScore(fundScoreRankDTO.getScore());
            } else {
                resultDO.setRank(999999);
                resultDO.setScore(null);
            }
            FundInitAndEndNavDTO initAndEndNavDTO = fundIdInitAndEndNavMap.get(fundId);
            if (initAndEndNavDTO != null) {
                resultDO.setPrePriceDate(StrUtil.isNotBlank(initAndEndNavDTO.getStartDate()) ? DateUtil.parse(initAndEndNavDTO.getStartDate(), DateConst.YYYY_MM_DD) : null);
                resultDO.setPreCumulativeNavWithdrawal(initAndEndNavDTO.getStartCumulativeNavWithdrawal());
                resultDO.setPriceDate(StrUtil.isNotBlank(initAndEndNavDTO.getEndDate()) ? DateUtil.parse(initAndEndNavDTO.getEndDate(), DateConst.YYYY_MM_DD) : null);
                resultDO.setCumulativeNavWithdrawal(initAndEndNavDTO.getEndCumulativeNavWithdrawal());
            }
            FundIndicatorDO fundIndicatorDO = fundIdIndicatorMap.get(fundId);
            if (fundIndicatorDO != null) {
                resultDO.setRet(fundIndicatorDO.getRet());
                resultDO.setRetA(fundIndicatorDO.getRetA());
                resultDO.setMaxdrawdown(fundIndicatorDO.getMaxdrawdown());
                resultDO.setCalmarratio(fundIndicatorDO.getCalmarratio());
                resultDO.setSortinoratio(fundIndicatorDO.getSortinoratio());
                resultDO.setSharperatio(fundIndicatorDO.getSharperatio());
                resultDO.setAlpha(fundIndicatorDO.getAlpha());
                resultDO.setWinrate(fundIndicatorDO.getWinrate());
                resultDO.setInfoRatio(fundIndicatorDO.getInfoRatio());
                resultDO.setExcessWinrate(fundIndicatorDO.getExcessWinrate());
                resultDO.setExcessRet(fundIndicatorDO.getExcessGeometry());
                resultDO.setExcessMaxdown(fundIndicatorDO.getExcessMaxdrawdown());
                resultDO.setExcessCalmarratio(fundIndicatorDO.getExcessCalmarratio());
                resultDO.setExcessSharperatio(fundIndicatorDO.getExcessSharperatio());
                resultDO.setExcessStddev(fundIndicatorDO.getExcessStddev());
                resultDO.setProductScale(fundIndicatorDO.getProductScale());
            } else {
                resultDO.setRank(999999);
                resultDO.setScore(null);
            }
            resultDO.setIsvalid(1);
            resultDO.setCreateTime(new Date());
            resultDO.setCreatorId(999999);
            resultDO.setUpdaterId(999999);
            resultDO.setUpdateTime(new Date());
            competitionResultDOList.add(resultDO);
        }
        return competitionResultDOList;
    }

    public Map<String, String> convertToMap(FundIndicatorDO indicatorDO) {
        Map<String, String> indicatorMap = MapUtil.newHashMap();
        Field[] fields = FundIndicatorDO.class.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            Object value = null;
            try {
                value = field.get(indicatorDO);
            } catch (Exception e) {
                indicatorMap.put(field.getName(), null);
            }
            indicatorMap.put(field.getName(), value != null ? value.toString() : null);
        }
        return indicatorMap;
    }

}