package com.mzl.flower.service.point;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.mzl.flower.config.exception.ValidationException;
import com.mzl.flower.config.security.SecurityUtils;
import com.mzl.flower.constant.Constants;
import com.mzl.flower.dto.request.point.*;
import com.mzl.flower.dto.response.point.PointGoodsDTO;
import com.mzl.flower.dto.response.point.PointGoodsListDTO;
import com.mzl.flower.dto.response.point.PointGoodsRecordDTO;
import com.mzl.flower.entity.point.CustomerPoint;
import com.mzl.flower.entity.point.CustomerPointDetail;
import com.mzl.flower.entity.point.PointGoods;
import com.mzl.flower.entity.point.PointGoodsRecord;
import com.mzl.flower.mapper.point.CustomerPointDetailMapper;
import com.mzl.flower.mapper.point.CustomerPointMapper;
import com.mzl.flower.mapper.point.PointGoodsMapper;
import com.mzl.flower.mapper.point.PointGoodsRecordMapper;
import com.mzl.flower.service.BaseService;
import com.mzl.flower.service.payment.RedisLockService;
import com.mzl.flower.utils.DateUtils;
import com.mzl.flower.utils.UUIDGenerator;
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.LocalDate;
import java.time.LocalDateTime;
import java.util.List;

@Service
@Transactional
public class PointGoodsService extends BaseService {

    @Autowired
    private PointGoodsMapper pointGoodsMapper;

    @Autowired
    private PointGoodsRecordMapper pointGoodsRecordMapper;

    @Autowired
    private CustomerPointMapper customerPointMapper;

    @Autowired
    private CustomerPointDetailMapper customerPointDetailMapper;


    @Autowired
    private RedisLockService lockService;

    public Long addPointGoods(PointGoodsCreateDTO dto){
        PointGoods p = new PointGoods();
        BeanUtils.copyProperties(dto, p);
        p.setPictures(toJSONString(dto.getPictureList()));
        p.setStatus(Constants.POINT_GOODS_STATUS.I.name());

        p.create(SecurityUtils.getUserId());
        pointGoodsMapper.insert(p);

        return p.getId();
    }

    public Long updatePointGoods(PointGoodsUpdateDTO dto){
        PointGoods p = pointGoodsMapper.selectById(dto.getId());
        if(p == null){
            throw new ValidationException("商品未找到");
        }

        BeanUtils.copyProperties(dto, p);
        p.setPictures(toJSONString(dto.getPictureList()));

        p.update(SecurityUtils.getUserId());
        pointGoodsMapper.updateById(p);

        return p.getId();
    }

    public void deletePointGoods(String idStr){
        List<String> ids = splitParam(idStr);
        if (ids != null && ids.size() > 0) {
            for(String idd : ids) {
                Long id = Long.parseLong(idd);
                pointGoodsMapper.deleteById(id);
            }
        }
    }

    public Page<PointGoodsListDTO> selectGoodsList(Page page, PointGoodsQueryDTO dto){
        List<PointGoodsListDTO> ls = pointGoodsMapper.selectGoodsList(page, dto);

        page.setRecords(ls);
        return page;
    }

    public PointGoodsDTO getGoodsInfo(Long id){
        PointGoods p = pointGoodsMapper.selectById(id);
        if(p == null){
            throw new ValidationException("商品未找到");
        }
        PointGoodsDTO dto = new PointGoodsDTO();
        BeanUtils.copyProperties(p, dto);
        dto.setPictureList(parseArray(p.getPictures(), String.class));

        return dto;
    }

    public void updateStatus(String idStr, String status){
        List<String> ids = splitParam(idStr);
        if(ids != null && ids.size() > 0) {
            for(String idd : ids) {
                Long id = Long.parseLong(idd);
                PointGoods p = pointGoodsMapper.selectById(id);
                if (p == null) {
                    continue;
                }

                if(Constants.POINT_GOODS_STATUS.A.name().equals(status)){
                    if(p.getStock() == null || p.getStock() <= 0){
                        throw new ValidationException("商品" + p.getName() + "库存为0不能上架");
                    }
                }

                p.setStatus(status);
                p.update(SecurityUtils.getUserId());
                pointGoodsMapper.updateById(p);
            }
        }
    }

    public void exchangeGoods(ExchangeGoodsDTO dto) {
        String key="EXCHANGE_GOODS:"+dto.getGoodsId()+":"+SecurityUtils.getUserId();
        boolean lock = lockService.getObjectLock(key, "");
        if(!lock){
            throw new ValidationException("系统操作频繁，请稍后重试");
        }
        try {
            PointGoods p = pointGoodsMapper.selectById(dto.getGoodsId());
            if(p == null){
                throw new ValidationException("商品未找到");
            }
            if(!Constants.POINT_GOODS_STATUS.A.name().equals(p.getStatus())){
                throw new ValidationException("商品未上架");
            }
            if(p.getStock()< dto.getNum()){
                throw new ValidationException("商品库存不足");
            }
            CustomerPoint cp = customerPointMapper.selectOne(new LambdaQueryWrapper<CustomerPoint>()
                    .eq(CustomerPoint::getUserId, SecurityUtils.getUserId()));
            if(cp == null || (cp.getTotalPoint()-cp.getUsedPoint()-cp.getExpiredPoint()-cp.getDeductionPoint()) < p.getPoint() * dto.getNum()){
                throw new ValidationException("积分不足");
            }
            //记录兑换记录
            PointGoodsRecord record = new PointGoodsRecord();
            record.setUserId(SecurityUtils.getUserId());
            record.setCustomerId(getCustomerByUserId(SecurityUtils.getUserId()).getId());
            record.setGoodsId(dto.getGoodsId());
            record.setNum(dto.getNum());
            record.setPoint(p.getPoint());
            record.setName(p.getName());
            record.setPictures(p.getCover());
            record.setDescription(p.getDescription());
            record.setTotalPoint(p.getPoint() * dto.getNum());
            record.setCover(p.getCover());
            record.setRedeemCode(UUIDGenerator.getUUID());
            record.setStatus(Constants.POINT_GOODS_RECORD_STATUS.A.name());//未使用
            LocalDate expireDate = LocalDate.now().plusYears(1);
            String expireDateStr = DateUtils.toString(expireDate,"yyyy-MM-dd");
            record.setExpireTime(DateUtils.dateToLocalDateTime(expireDateStr,false));
            record.create(SecurityUtils.getUserId());
            pointGoodsRecordMapper.insert(record);

            //更新积分汇总
            cp.setUsedPoint(cp.getUsedPoint()+record.getTotalPoint());
            customerPointMapper.updateById(cp);

            //记录积分明细
            CustomerPointDetail detail = new CustomerPointDetail();
            detail.setUserId(SecurityUtils.getUserId());
            detail.setCustomerId(record.getCustomerId());
            detail.setPoint(record.getTotalPoint());
            detail.setChangeType(Constants.POINT_CHANGE_TYPE.reduce.name());
            detail.setType(Constants.POINT_TYPE.exchange.name());
            detail.setRecordDate(LocalDate.now());
            detail.setRemarks(record.getName());
            detail.create(SecurityUtils.getUserId());
            customerPointDetailMapper.insert(detail);

            //更新库存
            p.setStock(p.getStock()- dto.getNum());
            pointGoodsMapper.updateById(p);
        }catch (Exception e){
            throw new ValidationException("兑换失败");
        }finally {
            lockService.releaseObjectLock(key,"");
        }

    }

    public Page<PointGoodsRecordDTO> myExchangeGoods(QueryExchangeGoodsDTO dto, Page page) {
        dto.setUserId(SecurityUtils.getUserId());
        List<PointGoodsRecordDTO> list = pointGoodsRecordMapper.selectMyExchangeGoods(dto,page);
        page.setRecords(list);
        return page;
    }

    public void useExchangeGoods(Long recordId,String orderId) {
        PointGoodsRecord record = pointGoodsRecordMapper.selectById(recordId);
        if(record == null){
            throw new ValidationException("兑换券不存在");
        }
        if(!Constants.POINT_GOODS_RECORD_STATUS.A.name().equals(record.getStatus())){
            throw new ValidationException("兑换券已使用或过期");
        }
        if(!SecurityUtils.getUserId().equals(record.getUserId())){
            throw new ValidationException("兑换券不属于当前用户");
        }
        record.setStatus(Constants.POINT_GOODS_RECORD_STATUS.U.name());
        record.setOrderId(orderId);
        pointGoodsRecordMapper.updateById(record);
    }

    public void revertExchangeGoods(Long recordId) {
        PointGoodsRecord record = pointGoodsRecordMapper.selectById(recordId);
        if(record == null){
            throw new ValidationException("兑换券不存在");
        }
        if(!Constants.POINT_GOODS_RECORD_STATUS.U.name().equals(record.getStatus())){
            throw new ValidationException("兑换券未使用或过期");
        }
        if(SecurityUtils.getUserId() != null && !SecurityUtils.getUserId().equals(record.getUserId())){
            throw new ValidationException("兑换券不属于当前用户");
        }
        record.setStatus(Constants.POINT_GOODS_RECORD_STATUS.A.name());
        record.setOrderId(null);
        pointGoodsRecordMapper.updateById(record);
    }
}