package com.mzl.flower.service.impl.coupon;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mzl.flower.config.exception.ValidationException;
import com.mzl.flower.config.security.SecurityUtils;
import com.mzl.flower.dto.request.coupon.CreateCouponRecordDTO;
import com.mzl.flower.dto.request.coupon.QueryCouponRecordDTO;
import com.mzl.flower.dto.request.coupon.QueryCouponStatisticsBO;
import com.mzl.flower.dto.request.coupon.QueryExistCouponDTO;
import com.mzl.flower.dto.response.coupon.CouponRecordVO;
import com.mzl.flower.entity.coupon.CouponRecordDO;
import com.mzl.flower.entity.coupon.CouponTemplateDO;
import com.mzl.flower.entity.customer.Customer;
import com.mzl.flower.entity.system.User;
import com.mzl.flower.enums.*;
import com.mzl.flower.mapper.coupon.CouponRecordMapper;
import com.mzl.flower.mapper.coupon.CouponRecordMapperCustom;
import com.mzl.flower.mapper.customer.CustomerMapper;
import com.mzl.flower.service.coupon.CouponRecordService;
import com.mzl.flower.service.coupon.CouponTemplateService2;
import com.mzl.flower.service.system.UserService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.time.temporal.TemporalAdjusters;
import java.util.List;
import java.util.stream.Collectors;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author @TaoJie
 * @since 2024-08-27
 */
@Slf4j
@Service
public class CouponRecordServiceImpl extends ServiceImpl<CouponRecordMapper, CouponRecordDO> implements CouponRecordService {

    @Autowired
    private CouponRecordMapperCustom couponRecordMapperCustom;

    @Autowired
    private CouponTemplateService2 couponTemplateService;

    @Autowired
    private UserService userService;

    @Autowired
    private CustomerMapper customerMapper;

    @Override
    public List<CouponRecordVO> getList(QueryCouponRecordDTO dto) {
        return couponRecordMapperCustom.getList(dto);
    }

    @Override
    public boolean createCouponRecord(CreateCouponRecordDTO dto) {

        final Customer customer = customerMapper.selectById(dto.getCustomerId());
        if(null==customer){
            throw new ValidationException("商户信息不存在");
        }

        final CouponTemplateDO couponTemplateDO = couponTemplateService.getById(dto.getCouponId());

        // TODO  活动优惠券和积分优惠券需要根据库存来控制- 根据优惠券的发放数量来控制有没有超发


        // TODO 根据用户领取设置的getLimit 查看当前用户是否已经超领优惠券


        CouponRecordDO couponRecordDO=new CouponRecordDO();
        BeanUtils.copyProperties(dto,couponRecordDO);
        couponRecordDO.create(SecurityUtils.getUserId());
        // 设置为待使用状态
        couponRecordDO.setStatus(CouponUsedStatusEnum.UNUSED.getType());

        // 根据商户设置用户id
        if(StringUtils.isBlank(dto.getUserId()) && StringUtils.isNotBlank(customer.getUserId())){
            couponRecordDO.setUserId(customer.getUserId());
        }

        // 优惠券字段冗余

        if(null!=couponTemplateDO){
            couponRecordDO.setCategory(couponTemplateDO.getGetUserType());
            couponRecordDO.setCouponCode(couponTemplateDO.getCouponCode());
            couponRecordDO.setCouponName(couponTemplateDO.getCouponName());
            couponRecordDO.setCouponDiscountValue(couponTemplateDO.getCouponDiscountValue());
            couponRecordDO.setMinOrderAmount(couponTemplateDO.getMinOrderAmount());
            couponRecordDO.setGetType(couponTemplateDO.getGetType());
            couponRecordDO.setCouponDiscountType(couponTemplateDO.getCouponDiscountType());
            couponRecordDO.setGetUserType(couponTemplateDO.getGetUserType());
            couponRecordDO.setPoint(couponTemplateDO.getPoint());


            // 根据优惠券模板来计算优惠券的生效开始时间和结束时间
            if(StringUtils.isNotBlank(couponTemplateDO.getCategory()) && couponTemplateDO.getCategory().equals(CouponCategoryEnum.MEMBER.getStatus())){
                // 如果是会员优惠券的话，则设置为优惠券的使用条件为优惠券的时间
                couponRecordDO.setEffectiveStart(couponTemplateDO.getUsageStartDate());
                couponRecordDO.setEffectiveEnd(couponTemplateDO.getUsageEndDate());
            }else{
                // 非会员的根据领取时间类型来计算优惠券的时间
                if(StringUtils.isNotBlank(couponTemplateDO.getUsageType()) && couponTemplateDO.getUsageType().equals(CouponUsageTypeEnum.GET.getType())){
                    // 与领取时间一致
                    couponRecordDO.setEffectiveStart(couponTemplateDO.getGetStartDate());
                    couponRecordDO.setEffectiveEnd(couponTemplateDO.getGetEndDate());
                }
                if(StringUtils.isNotBlank(couponTemplateDO.getUsageType()) && couponTemplateDO.getUsageType().equals(CouponUsageTypeEnum.FIXED.getType())){
                    // 固定时间
                    couponRecordDO.setEffectiveStart(couponTemplateDO.getUsageStartDate());
                    couponRecordDO.setEffectiveEnd(couponTemplateDO.getUsageEndDate());
                }
                if(StringUtils.isNotBlank(couponTemplateDO.getUsageType()) && couponTemplateDO.getUsageType().equals(CouponUsageTypeEnum.GET_AFTER_TIME.getType())){
                    // 领取后有段时间 领取后有效时间
                    // 根据发放后有效期来设置时间
                    if (couponTemplateDO.getUsageTimeNum() == null || couponTemplateDO.getUsageTimeNum() <= 0) {
                        throw new IllegalArgumentException("使用时间数量必须为正整数");
                    }
                    LocalDateTime currentTime = LocalDateTime.now();
                    couponRecordDO.setEffectiveStart(currentTime);
                    if (couponTemplateDO.getUsageTimeType().equals(CouponUsageTimeTypeEnum.DAY.getType())) {
                        // 天
                        couponRecordDO.setEffectiveEnd(currentTime.plusDays(couponTemplateDO.getUsageTimeNum()));
                    }
                    if (couponTemplateDO.getUsageTimeType().equals(CouponUsageTimeTypeEnum.HOUR.getType())) {
                        // 小时
                        couponRecordDO.setEffectiveEnd(currentTime.plusHours(couponTemplateDO.getUsageTimeNum()));
                    }
                    if (couponTemplateDO.getUsageTimeType().equals(CouponUsageTimeTypeEnum.MINUTE.getType())) {
                        // 分钟
                        couponRecordDO.setEffectiveEnd(currentTime.plusMinutes(couponTemplateDO.getUsageTimeNum()));
                    }

                }
            }

        }


        return baseMapper.insert(couponRecordDO)>0;
    }

    @Override
    public boolean updateCouponRecord(CreateCouponRecordDTO dto) {
        CouponRecordDO couponRecordDO=baseMapper.selectById(dto.getId());
        BeanUtils.copyProperties(dto,couponRecordDO);
        couponRecordDO.update(SecurityUtils.getUserId());

        // 优惠券字段冗余
        final CouponTemplateDO couponTemplateDO = couponTemplateService.getById(dto.getCouponId());
        if(null!=couponTemplateDO){
            couponRecordDO.setCategory(couponTemplateDO.getGetUserType());
            couponRecordDO.setCouponCode(couponTemplateDO.getCouponCode());
            couponRecordDO.setCouponName(couponTemplateDO.getCouponName());
            couponRecordDO.setCouponDiscountValue(couponTemplateDO.getCouponDiscountValue());
            couponRecordDO.setMinOrderAmount(couponTemplateDO.getMinOrderAmount());
        }


        return baseMapper.updateById(couponRecordDO)>0;
    }

    @Override
    public boolean deleteCouponRecord(String id) {
        return baseMapper.deleteById(id)>0;
    }

    @Override
    public CouponRecordVO getCouponRecordById(String id) {
        QueryCouponRecordDTO dto=new QueryCouponRecordDTO();
        dto.setId(id);
        final List<CouponRecordVO> list = couponRecordMapperCustom.getList(dto);
        if(CollectionUtils.isNotEmpty(list)){
            return list.get(0);
        }
        return null;
    }

    @Override
    public Page<CouponRecordVO> getPage(Page page, QueryCouponRecordDTO dto) {
        List<CouponRecordVO> result=couponRecordMapperCustom.getPage(page,dto);
        return page.setRecords(result);
    }

    @Transactional
    @Override
    public boolean grantVipCouponRecordList() {

        try{
            LocalDateTime now = LocalDateTime.now();
            LocalDateTime firstDayStart = now.with(TemporalAdjusters.firstDayOfMonth()).withHour(0).withMinute(0).withSecond(0).withNano(0);
            LocalDateTime lastDayEnd = now.with(TemporalAdjusters.lastDayOfMonth()).withHour(23).withMinute(59).withSecond(59).withNano(0);

            // 获取所有会员模版列表
            List<CouponTemplateDO> vipTemplateList= couponTemplateService.getVipCouponTemplate();

            // 遍历所有相同等级用户信息，并根据优惠券设置的规则构造优惠券
            final List<CouponTemplateDO> updateCouponTemplateList = vipTemplateList.stream().map(couponTemplateDO -> {
                final List<User> vipGradeUserList = userService.getVipGradeUserList(couponTemplateDO.getVipGrade());
                final List<CouponRecordDO> gradeCouponRecordList = vipGradeUserList.stream().map(user -> {
                    CouponRecordDO couponRecordDO = new CouponRecordDO();
                    BeanUtils.copyProperties(couponTemplateDO, couponRecordDO);
                    couponRecordDO.setId(IdUtil.simpleUUID());
                    couponRecordDO.setCouponId(couponTemplateDO.getId());
                    couponRecordDO.setUserId(user.getId());
                    couponRecordDO.setStatus(CouponUsedStatusEnum.UNUSED.getType());
                    couponRecordDO.setEffectiveStart(firstDayStart);
                    couponRecordDO.setEffectiveEnd(lastDayEnd);

                    // 创建信息
                    couponRecordDO.create();
                    return couponRecordDO;
                }).collect(Collectors.toList());

                // 批量保存等级下的优惠券信息
                saveBatch(gradeCouponRecordList);

                couponTemplateDO.setUsageStartDate(firstDayStart);
                couponTemplateDO.setUsageEndDate(lastDayEnd);
                couponTemplateDO.setGetStartDate(firstDayStart);
                couponTemplateDO.setGetEndDate(lastDayEnd);

                // 设置默认类型固定
                couponTemplateDO.setUsageType(CouponUsageTypeEnum.FIXED.getType());

                return couponTemplateDO;

            }).collect(Collectors.toList());

            // 批量更新原模版时间
            couponTemplateService.updateBatchById(updateCouponTemplateList);

            return true;
        }catch (Exception e){
            // 报错日志信息报错
            log.error(e.getMessage());
            return false;
        }
    }

    @Override
    public boolean expiredCouponRecordByListCurMonth() {

        try{
            LocalDateTime now = LocalDateTime.now();
            LocalDateTime firstDayStart = now.with(TemporalAdjusters.firstDayOfMonth()).withHour(0).withMinute(0).withSecond(0).withNano(0);
            LocalDateTime lastDayEnd = now.with(TemporalAdjusters.lastDayOfMonth()).withHour(23).withMinute(59).withSecond(59).withNano(0);

            // 只要找出时间小于当月的首天的设置成过期就可以

            QueryWrapper<CouponRecordDO> queryWrapper=new QueryWrapper<>();
            queryWrapper.lambda().eq(CouponRecordDO::getOrderId,"")
                    .lt(CouponRecordDO::getEffectiveEnd,firstDayStart);

            final List<CouponRecordDO> couponRecordDOS = baseMapper.selectList(queryWrapper);

            final List<CouponRecordDO> expiredCouponRecordList = couponRecordDOS.stream().map(couponRecordDO -> {
                couponRecordDO.setStatus(CouponUsedStatusEnum.EXPIRED.getType());
                return couponRecordDO;
            }).collect(Collectors.toList());

            //更新
            updateBatchById(expiredCouponRecordList);

            return true;
        }catch (Exception e){
            log.error(e.getMessage());
            return false;
        }


    }

    @Override
    public Integer statisCouponTemplateCount(QueryCouponStatisticsBO queryCouponStatisticsBO) {
        return couponRecordMapperCustom.statisCouponTemplateCount(queryCouponStatisticsBO);
    }
    @Override
    public Integer statisCouponTemplateCurMonCount(QueryCouponStatisticsBO queryCouponStatisticsBO) {
        return couponRecordMapperCustom.statisCouponTemplateCurMonCount(queryCouponStatisticsBO);
    }

    @Override
    public Integer statisCouponPointCurMonPontAmonut(QueryCouponStatisticsBO queryCouponStatisticsBO) {
        return couponRecordMapperCustom.statisCouponPointCurMonPointAmonut(queryCouponStatisticsBO);
    }

    @Override
    public int getExistCouponAmount(QueryExistCouponDTO dto) {
        QueryWrapper<CouponRecordDO> queryWrapper=new QueryWrapper<>();
        queryWrapper.lambda().eq(CouponRecordDO::getDeleted, TrueOrFalseEnum.FALSE.isFlag())
                .eq(StringUtils.isNotBlank(dto.getCouponId()), CouponRecordDO::getCouponId,dto.getCouponId())
                .eq(StringUtils.isNotBlank(dto.getCustomerId()),CouponRecordDO::getCustomerId,dto.getCustomerId())
                .eq(StringUtils.isNotBlank(dto.getCategory()),CouponRecordDO::getCategory,dto.getCategory());

        return baseMapper.selectCount(queryWrapper);
    }
}