package cc.mrbird.febs.mall.service.impl;

import cc.mrbird.febs.common.exception.FebsException;
import cc.mrbird.febs.common.utils.LoginUserUtil;
import cc.mrbird.febs.mall.conversion.MallShoppingCartConversion;
import cc.mrbird.febs.mall.dto.AddCartDto;
import cc.mrbird.febs.mall.entity.MallGoodsSku;
import cc.mrbird.febs.mall.entity.MallShoppingCart;
import cc.mrbird.febs.mall.mapper.MallGoodsSkuMapper;
import cc.mrbird.febs.mall.mapper.MallShoppingCartMapper;
import cc.mrbird.febs.mall.service.IApiMallShoppingCartService;
import cc.mrbird.febs.mall.vo.ShoppingCartGoodsVo;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @author wzy
 * @date 2021-09-17
 **/
@Slf4j
@Service
@RequiredArgsConstructor
public class ApiMallShoppingCartServiceImpl extends ServiceImpl<MallShoppingCartMapper, MallShoppingCart> implements IApiMallShoppingCartService {

    private final MallGoodsSkuMapper mallGoodsSkuMapper;

    @Override
    public List<ShoppingCartGoodsVo> findCartGoodsList() {
        Long memberId = LoginUserUtil.getLoginUser().getId();
        List<MallShoppingCart> carts = this.baseMapper.selectCartGoodsList(memberId);

        return MallShoppingCartConversion.INSTANCE.entityListToVoList(carts);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void addGoodsToCart(List<AddCartDto> addCartDtoList) {
        for (AddCartDto addCartDto : addCartDtoList) {
            MallGoodsSku sku = mallGoodsSkuMapper.selectById(addCartDto.getSkuId());

            if (sku == null) {
                throw new FebsException("sku不存在");
            }
            Long memberId = LoginUserUtil.getLoginUser().getId();

            MallShoppingCart cartGoods = this.baseMapper.selectCartGoodsBySkuId(sku.getId(), memberId);
            if (cartGoods == null) {
                cartGoods = new MallShoppingCart();
                cartGoods.setGoodsId(sku.getGoodsId());
                cartGoods.setSkuId(sku.getId());
                cartGoods.setStyleId(sku.getStyleId());
                cartGoods.setCnt(addCartDto.getCnt());
                cartGoods.setMemberId(memberId);

                this.baseMapper.insert(cartGoods);
            } else {
                cartGoods.setCnt(cartGoods.getCnt() + addCartDto.getCnt());
                this.baseMapper.updateById(cartGoods);
            }
        }
    }
}