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.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.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;


    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(Long id){
        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(Long id, String status){
        PointGoods p = pointGoodsMapper.selectById(id);
        if(p == null){
            throw new ValidationException("商品未找到");
        }

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

    public synchronized void exchangeGoods(ExchangeGoodsDTO dto) {
        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()) < 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.getPictures());
        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
        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.create(SecurityUtils.getUserId());
        customerPointDetailMapper.insert(detail);

        //更新库存
        p.setStock(p.getStock()- dto.getNum());
        pointGoodsMapper.updateById(p);
    }

    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");
        }
        record.setStatus(Constants.POINT_GOODS_RECORD_STATUS.U.name());
        record.setOrderId(orderId);
        pointGoodsRecordMapper.updateById(record);
    }
}