package com.doumee.service.business.impl;

import com.doumee.core.constants.ResponseStatus;
import com.doumee.core.exception.BusinessException;
import com.doumee.core.model.LoginUserInfo;
import com.doumee.core.model.PageData;
import com.doumee.core.model.PageWrap;
import com.doumee.core.utils.Constants;
import com.doumee.core.utils.DateUtil;
import com.doumee.core.utils.ListUtil;
import com.doumee.core.utils.Utils;
import com.doumee.dao.business.*;
import com.doumee.dao.business.model.*;
import com.doumee.dao.web.dto.CouponDTO;
import com.doumee.dao.web.dto.MemberCouponDTO;
import com.doumee.dao.web.request.PayDetailRequest;
import com.doumee.dao.web.response.goods.OrderGoodsCalculateResponse;
import com.doumee.service.business.MemberCouponService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.github.yulichang.wrapper.MPJLambdaWrapper;
import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.SecurityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 用户优惠券关联表Service实现
 * @author 江蹄蹄
 * @date 2023/03/21 15:48
 */
@Service
public class MemberCouponServiceImpl implements MemberCouponService {

    @Autowired
    private MemberCouponMapper memberCouponMapper;

    @Autowired
    private GoodsMapper goodsMapper;

    @Autowired
    private GoodsSkuMapper goodsSkuMapper;

    @Autowired
    private MemberCouponJoinMapper memberCouponJoinMapper;

    @Autowired
    private CouponMapper couponMapper;

    @Autowired
    private MemberMapper memberMapper;
    @Override
    public Integer create(MemberCoupon memberCoupon) {
        LoginUserInfo loginUserInfo = (LoginUserInfo)SecurityUtils.getSubject().getPrincipal();

        Coupon coupon = couponMapper.selectById(memberCoupon.getCouponId());
        if(Objects.isNull(coupon)){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "未查询到优惠券信息");
        }

        if(coupon.getStatus().equals(Constants.ONE)){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "该优惠券已禁用,无法兑换！");
        }
        //查询已兑换数量
        QueryWrapper queryWrapper = new QueryWrapper<MemberCoupon>();
        queryWrapper.eq("COUPON_ID",coupon.getId());
        Long exchangeNum = memberCouponMapper.selectCount(queryWrapper);
        if(exchangeNum.compareTo(coupon.getNum()) >= Constants.ZERO){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "该优惠券已兑换完,无法兑换！");
        }
        //是否已兑换
        queryWrapper.eq("MEMBER_ID",coupon.getId());
        if(memberCouponMapper.selectCount(queryWrapper) > Constants.ZERO){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "已兑换该优惠券,无法兑换！");
        };

        MemberCoupon insert = new MemberCoupon();
        Date now = new Date();
        insert.setCreator(loginUserInfo.getId());
        insert.setCreateDate(now);
        insert.setEditor(loginUserInfo.getId());
        insert.setEditDate(now);
        insert.setIsdeleted(Constants.ZERO);
        insert.setRemark(memberCoupon.getRemark());
        insert.setMemberId(loginUserInfo.getMemberId());
        insert.setShopId(coupon.getShopId());
        insert.setType(coupon.getType());
        insert.setLimitPrice(coupon.getLimitPrice());
        insert.setPrice(coupon.getPrice());
        insert.setStartDate(now);
        //推迟天数
        LocalDateTime localDateTime = LocalDateTime.now().minusDays(coupon.getValidDays());
        insert.setEndDate(DateUtil.toDate(localDateTime));
        insert.setGetMethod(Constants.ONE);
        insert.setIntegral(coupon.getIntegral());
        insert.setStatus(Constants.ZERO);
        insert.setInfo(coupon.getInfo());
//        insert.setBackIntegral(coupon.getB);
        insert.setName(coupon.getName());
        insert.setCouponId(coupon.getId());
        memberCouponMapper.insert(insert);
        return memberCoupon.getId();
    }

    @Override
    public void deleteById(Integer id) {
        memberCouponMapper.deleteById(id);
    }

    @Override
    public void delete(MemberCoupon memberCoupon) {
        UpdateWrapper<MemberCoupon> deleteWrapper = new UpdateWrapper<>(memberCoupon);
        memberCouponMapper.delete(deleteWrapper);
    }

    @Override
    public void deleteByIdInBatch(List<Integer> ids) {
        if (CollectionUtils.isEmpty(ids)) {
            return;
        }
        memberCouponMapper.deleteBatchIds(ids);
    }

    @Override
    public void updateById(MemberCoupon memberCoupon) {
        memberCouponMapper.updateById(memberCoupon);
    }

    @Override
    public void updateByIdInBatch(List<MemberCoupon> memberCoupons) {
        if (CollectionUtils.isEmpty(memberCoupons)) {
            return;
        }
        for (MemberCoupon memberCoupon: memberCoupons) {
            this.updateById(memberCoupon);
        }
    }

    @Override
    public MemberCoupon findById(Integer id) {
        return memberCouponMapper.selectById(id);
    }

    @Override
    public MemberCoupon findOne(MemberCoupon memberCoupon) {
        QueryWrapper<MemberCoupon> wrapper = new QueryWrapper<>(memberCoupon);
        return memberCouponMapper.selectOne(wrapper);
    }

    @Override
    public List<MemberCoupon> findList(MemberCoupon memberCoupon) {
        QueryWrapper<MemberCoupon> wrapper = new QueryWrapper<>(memberCoupon);
        return memberCouponMapper.selectList(wrapper);
    }
  
    @Override
    public PageData<MemberCoupon> findPage(PageWrap<MemberCoupon> pageWrap) {
        IPage<MemberCoupon> page = new Page<>(pageWrap.getPage(), pageWrap.getCapacity());
        MPJLambdaWrapper<MemberCoupon> queryWrapper = new MPJLambdaWrapper<>();
        Utils.MP.blankToNull(pageWrap.getModel());

        queryWrapper.selectAll(MemberCoupon.class);
        queryWrapper.selectAs(Member::getNickname,MemberCoupon::getNikeName);

        queryWrapper.leftJoin(Member.class,Member::getId,MemberCoupon::getMemberId);

        queryWrapper.eq(MemberCoupon::getIsdeleted, Constants.ZERO);
        queryWrapper.eq(pageWrap.getModel().getStatus()!=null,MemberCoupon::getStatus, pageWrap.getModel().getStatus());
        queryWrapper.eq(pageWrap.getModel().getGetMethod()!=null,MemberCoupon::getGetMethod, pageWrap.getModel().getGetMethod());
        queryWrapper.and(StringUtils.isNotBlank(pageWrap.getModel().getNikeName()),ms -> ms.like( Member::getNickname,  pageWrap.getModel().getNikeName()).
                or().eq( Member::getName, pageWrap.getModel().getNikeName()).
                or().eq( Member::getPhone, pageWrap.getModel().getNikeName()));
        queryWrapper.orderByDesc(MemberCoupon::getCreateDate);
        IPage<MemberCoupon> result = memberCouponJoinMapper.selectJoinPage(page, MemberCoupon.class, queryWrapper);
        return PageData.from(result);
    }

    @Override
    public long count(MemberCoupon memberCoupon) {
        QueryWrapper<MemberCoupon> wrapper = new QueryWrapper<>(memberCoupon);
        return memberCouponMapper.selectCount(wrapper);
    }

    /****************************************移动端接口开始********************************************************************/


    /**
     * 优惠券列表
     * @param pages
     * @param price
     * @param memberId
     * @param couponType
     * @return
     */
    @Override
    public IPage<CouponDTO> memberCouponPage(IPage pages, BigDecimal price, Integer memberId,Integer couponType) {
        IPage<CouponDTO> page = memberCouponMapper.memberCouponPage(pages,new QueryWrapper<CouponDTO>()
                .eq("m.MEMBER_ID",memberId)
                .eq("m.TYPE",Constants.ONE)
                .eq("m.STATUS",Constants.ZERO)
                .eq("TYPE",couponType)
                .apply(!Objects.isNull(price)," m.LIMIT_PRICE >= "+price+" ")
                .apply("   now() between m.START_DATE and m.END_DATE ")
                .orderByDesc(" m.PRICE ")
        );
        return page;
    }





    /**
     * 优惠券数量
     * @param price
     * @param memberId
     * @param couponType
     * @return
     */
    @Override
    public long memberCouponNum( BigDecimal price, Integer memberId,Integer couponType) {
        long count = memberCouponMapper.selectCount(new QueryWrapper<MemberCoupon>()
                .eq("MEMBER_ID",memberId)
                .eq("STATUS",Constants.ZERO)
                .eq("TYPE",couponType)
                .apply("LIMIT_PRICE >= "+price+" ")
                .apply("   now() between START_DATE and  END_DATE ")
                .orderByDesc(" PRICE ")
        );
        return count;
    }

    @Override
    public PageData<MemberCouponDTO> findMemberCouponDTO(PageWrap<MemberCouponDTO> pageWrap) {
        IPage<MemberCoupon> page = new Page<>(pageWrap.getPage(), pageWrap.getCapacity());
        MPJLambdaWrapper<MemberCoupon> queryWrapper = new MPJLambdaWrapper<>();
        Utils.MP.blankToNull(pageWrap.getModel());
        queryWrapper.selectAs(MemberCoupon::getId,MemberCouponDTO::getId);
        queryWrapper.selectAs(Member::getId,MemberCouponDTO::getMemberId);
        queryWrapper.selectAs(Member::getImgurl,MemberCouponDTO::getImgurl);
        queryWrapper.selectAs(MemberCoupon::getShopId,MemberCouponDTO::getShopId);
        queryWrapper.selectAs(MemberCoupon::getType,MemberCouponDTO::getType);
        queryWrapper.selectAs(MemberCoupon::getLimitPrice,MemberCouponDTO::getLimitPrice);
        queryWrapper.selectAs(MemberCoupon::getPrice,MemberCouponDTO::getPrice);
        queryWrapper.selectAs(MemberCoupon::getStartDate,MemberCouponDTO::getStartDate);
        queryWrapper.selectAs(MemberCoupon::getEndDate,MemberCouponDTO::getEndDate);
        queryWrapper.selectAs(MemberCoupon::getUseDate,MemberCouponDTO::getUseDate);
        queryWrapper.selectAs(MemberCoupon::getStatus,MemberCouponDTO::getStatus);
        queryWrapper.leftJoin(MemberCoupon.class,MemberCoupon::getMemberId,Member::getId);
        queryWrapper.eq(MemberCoupon::getCouponId,pageWrap.getModel().getCouponId())
                    .like(StringUtils.isNotBlank(pageWrap.getModel().getNikeName()),Member::getNickname,pageWrap.getModel().getNikeName())
                    .eq(MemberCoupon::getStatus,pageWrap.getModel().getStatus());
        IPage<MemberCouponDTO> result = memberCouponJoinMapper.selectJoinPage(page, MemberCouponDTO.class, queryWrapper);

        if (CollectionUtils.isEmpty(result.getRecords())){
            return PageData.from(new Page<>());
        }
        result.getRecords().stream().filter(s->Constants.equalsInteger(Constants.ZERO,s.getStatus()))
                .forEach(s->{
                    s.setStatus(s.getEndDate().before(new Date()) ? -1 : 0);
                });
        return PageData.from(result);
    }

    public void exchangeCoupon(Integer couponId, Integer memberId){
        Coupon coupon = couponMapper.selectById(couponId);
        if(Objects.isNull(coupon)){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "未查询到优惠券信息");
        }
        if(!coupon.getType().equals(Constants.ONE)){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "非平台优惠券,无法兑换！");
        }
        if(coupon.getStatus().equals(Constants.ONE)){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "该优惠券已禁用,无法兑换！");
        }
        //查询已兑换数量
        QueryWrapper queryWrapper = new QueryWrapper<MemberCoupon>();
        queryWrapper.eq("COUPON_ID",couponId);
        Long exchangeNum = memberCouponMapper.selectCount(queryWrapper);
        if(exchangeNum.compareTo(coupon.getNum())>=Constants.ZERO){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "该优惠券已兑换完,无法兑换！");
        }
        //是否已兑换
        queryWrapper.eq("MEMBER_ID",memberId);
        if(memberCouponMapper.selectCount(queryWrapper)>Constants.ZERO){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "已兑换该优惠券,无法兑换！");
        };
        //查询剩余咖豆是否足够购买
        Member member = memberMapper.selectById(memberId);
        if(member.getIntegral().compareTo(coupon.getIntegral())<Constants.ZERO){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(), "咖豆不足,无法兑换！");
        }
        MemberCoupon memberCoupon = new MemberCoupon();
        memberCoupon.setCreator(memberId);
        memberCoupon.setCreateDate(new Date());
        memberCoupon.setIsdeleted(Constants.ZERO);
        memberCoupon.setMemberId(memberId);
        memberCoupon.setType(coupon.getType());
        memberCoupon.setLimitPrice(coupon.getLimitPrice());
        memberCoupon.setPrice(coupon.getPrice());
        memberCoupon.setStartDate(new Date());
        //推迟天数
        LocalDateTime localDateTime = LocalDateTime.now().minusDays(coupon.getValidDays());
        memberCoupon.setEndDate(DateUtil.toDate(localDateTime));
        memberCoupon.setGetMethod(Constants.ONE);
        memberCoupon.setIntegral(coupon.getIntegral());
        memberCoupon.setStatus(Constants.ZERO);
        memberCoupon.setInfo(coupon.getInfo());
        memberCoupon.setCouponId(couponId);
        memberCoupon.setBackIntegral(BigDecimal.ZERO);
        memberCoupon.setName(coupon.getName());
        memberCouponMapper.insert(memberCoupon);
        //TODO 添加积分变动记录

        //更新用户积分
        memberMapper.subtractIntegral(memberId,memberCoupon.getIntegral());
    }


    /**
     * 根据商品信息获取适用的优惠券
     */
    @Override
    public List<MemberCoupon> getApplyCoupon(List<PayDetailRequest> requestList,Integer memberId){
        List<MemberCoupon> memberCouponList = new ArrayList<>();
        List<GoodsSku> goodsSkuList = goodsSkuMapper.selectList(new QueryWrapper<GoodsSku>()
                .lambda()
                .eq(GoodsSku::getIsdeleted,Constants.ZERO)
                .in(GoodsSku::getId,requestList.stream().map(i->i.getGoodsSkuId()).collect(Collectors.toList()))
        );
        if(CollectionUtils.isEmpty(goodsSkuList)||!Constants.equalsInteger(goodsSkuList.size(),requestList.size())){
            throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(),"商品SKU信息错误,请刷新重试");
        }

        //查询商品列表
        List<Goods> goodsList = goodsMapper.selectJoinList(Goods.class,
                new MPJLambdaWrapper<Goods>()
                        .selectAs(GoodsSku::getPrice,Goods::getSkuPrice)
                        .selectAs(GoodsSku::getId,Goods::getSkuId)
                        .leftJoin(GoodsSku.class,GoodsSku::getGoodsId,Goods::getId)
                .in(GoodsSku::getId,requestList.stream().map(i->i.getGoodsSkuId()).collect(Collectors.toList())));

        if(Objects.isNull(goodsList)){
            return memberCouponList;
        }

        //获取选择的商品总金额 与 单个商品金额
        BigDecimal totalAmount = BigDecimal.ZERO;
        for (Goods goods:goodsList) {
            List<PayDetailRequest> request = requestList.stream().filter(i->Constants.equalsInteger(i.getGoodsSkuId(), goods.getSkuId())).collect(Collectors.toList());
            if(CollectionUtils.isNotEmpty(request)){
                goods.setSkuAmount(goods.getSkuPrice().multiply(new BigDecimal(request.get(Constants.ZERO).getGoodsNum()+"")));
                totalAmount = totalAmount.add(goods.getSkuAmount());
            }
        }
        List<OrderGoodsCalculateResponse> goodsCalculateList = ListUtil.copyProperties(goodsList,OrderGoodsCalculateResponse::new);
        //获取所有满足金额且可用的优惠券
        List<MemberCoupon> allCoupon =  memberCouponMapper.selectList(new QueryWrapper<MemberCoupon>().lambda()
                        .eq(MemberCoupon::getIsdeleted,Constants.ZERO)
                        .eq(MemberCoupon::getStatus,Constants.ZERO)
                        .apply("  LIMIT_PRICE <= " + totalAmount)
                        .apply("  now() between START_DATE and  END_DATE "));

        if(CollectionUtils.isNotEmpty(allCoupon)){
            for (MemberCoupon memberCoupon:allCoupon) {
                //适用类型：0=全场;1=品类；2=指定商品
                 if(Constants.equalsInteger(memberCoupon.getApplyType(),Constants.ZERO)){
                     memberCoupon.setValidAmount(memberCoupon.getPrice());
                 }else{
                     List<String> applyIdList = Arrays.asList(memberCoupon.getApplyIds().split(","));
                     //获取有效可以使用优惠券的数据
                     isVaildUse(applyIdList,goodsCalculateList,
                             Constants.equalsInteger(memberCoupon.getApplyType(),Constants.ONE)?Constants.ONE:Constants.ZERO);
                     BigDecimal skuAmount = goodsCalculateList.stream().filter(i->i.getUseCoupon()).map(i->i.getSkuAmount()).reduce(BigDecimal.ZERO,BigDecimal::add);
                     if(skuAmount.compareTo(memberCoupon.getLimitPrice())>=Constants.ZERO){
                         //根据金额计算实际折扣金额
                         BigDecimal couponPrice = skuAmount.multiply(memberCoupon.getPrice()).divide(new BigDecimal("100"),2, RoundingMode.HALF_UP);
                         //折扣金额大于最大可折扣金额  则使用最大可折扣金额
                         memberCoupon.setValidAmount(couponPrice.compareTo(memberCoupon.getMaxPrice())>Constants.ZERO?memberCoupon.getMaxPrice():couponPrice);
                         memberCouponList.add(memberCoupon);
                     }
                 }
            }
        }
        // 使用 Stream 排序  reversed() 表示倒序
        memberCouponList = memberCouponList.stream().sorted(Comparator.comparing(MemberCoupon::getValidAmount,Comparator.nullsFirst(BigDecimal::compareTo)).reversed())
                .collect(Collectors.toList());
        return memberCouponList;
    }


    /**
     * 计算当前已选择优惠券每个商品占比金额
     * @param coupon 优惠券信息
     * @param goodsCalculateList 商品集合
     * @param totalAmount 订单总金额
     */
    public void  calculateCouponRata(MemberCoupon coupon,List<OrderGoodsCalculateResponse> goodsCalculateList,BigDecimal totalAmount){
        //总余额
        BigDecimal validAmount = coupon.getValidAmount();
        //剩余可分配金额
        BigDecimal surplusValidAmount = validAmount;
        //已用占比比例值
        BigDecimal rata = BigDecimal.ZERO;
        //根据优惠券类型 计算可以使用优惠券的商品信息 适用类型：0=全场;1=品类；2=指定商品
        if(!Constants.equalsInteger(coupon.getApplyType(),Constants.ZERO)){
            List<String> applyIdList = Arrays.asList(coupon.getApplyIds().split(","));
            isVaildUse(applyIdList,goodsCalculateList,
                    Constants.equalsInteger(coupon.getApplyType(),Constants.ONE)?Constants.ONE:Constants.ZERO);
        }
        //使用了优惠券的商品数量
        Integer countCouponNum = goodsCalculateList.stream().filter(i->i.getUseCoupon()).collect(Collectors.toList()).size();
        Integer useCouponNum = Constants.ZERO;
        for (int i = 0; i < goodsCalculateList.size(); i++) {
            if(!goodsCalculateList.get(i).getUseCoupon()){
                goodsCalculateList.get(i).setCouponDeductCash(BigDecimal.ZERO);
                continue;
            }
            if(Constants.equalsInteger(useCouponNum+1,countCouponNum)){
                goodsCalculateList.get(i).setOrderCouponRata(new BigDecimal("1").subtract(rata));
                goodsCalculateList.get(i).setCouponDeductCash(surplusValidAmount);
                break;
            }
            goodsCalculateList.get(i).setOrderCouponRata(goodsCalculateList.get(i).getSkuAmount().divide(totalAmount,2,BigDecimal.ROUND_DOWN));
            goodsCalculateList.get(i).setCouponDeductCash(validAmount.multiply(goodsCalculateList.get(i).getOrderCouponRata()));
            surplusValidAmount = surplusValidAmount.subtract(goodsCalculateList.get(i).getCouponDeductCash());
            rata = rata.add(goodsCalculateList.get(i).getOrderCouponRata());
            useCouponNum = useCouponNum + 1;
        }
    }





    /**
     * 判断是否可以有效使用
     * @param idList
     * @param goodsList
     * @param vaildType 0=商品；1=品类
     * @return
     */
    public void isVaildUse(List<String> idList,List<OrderGoodsCalculateResponse> goodsList,Integer vaildType){
        for (OrderGoodsCalculateResponse response:goodsList) {
            response.setUseCoupon(idList.contains(Constants.equalsInteger(vaildType,Constants.ZERO)?response.getId().toString():response.getCategoryId().toString())?true:false);
        }
    }
//    public Set<Integer> isVaildUse(List<String> idList,List<OrderGoodsCalculateResponse> goodsList,Integer vaildType){
//        List<OrderGoodsCalculateResponse> resultList = new ArrayList<>();
//        for (String id:idList) {
//            if(Constants.equalsInteger(vaildType,Constants.ZERO)){
//                resultList.addAll(goodsList.stream().filter(i->i.getId().toString().equals(id)).collect(Collectors.toList()));
//            }else{
//                resultList.addAll(goodsList.stream().filter(i->i.getCategoryId().toString().equals(id)).collect(Collectors.toList()));
//            }
//        }
//        if(CollectionUtils.isNotEmpty(resultList)){
//            return new HashSet<>(resultList.stream().map(i->i.getId()).collect(Collectors.toList()));
//        }
//        return new HashSet<>();
//    }






}