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

import cc.mrbird.febs.common.exception.FebsException;
import cc.mrbird.febs.common.exception.GeneratorException;
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.MallGoods;
import cc.mrbird.febs.mall.entity.MallGoodsSku;
import cc.mrbird.febs.mall.entity.MallShoppingCart;
import cc.mrbird.febs.mall.mapper.MallGoodsMapper;
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.core.conditions.query.LambdaQueryWrapper;
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;
    private final MallGoodsMapper mallGoodsMapper;

    @Override
    public List<ShoppingCartGoodsVo> findCartGoodsList(Integer type) {
        if (type == null) {
            type = 1;
        }
        Long memberId = LoginUserUtil.getLoginUser().getId();
        List<MallShoppingCart> carts = this.baseMapper.selectCartGoodsList(memberId, type);

        return MallShoppingCartConversion.INSTANCE.entityListToVoList(carts);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void addGoodsToCart(List<AddCartDto> addCartDtoList) {
        Long memberId = LoginUserUtil.getLoginUser().getId();
        for (AddCartDto addCartDto : addCartDtoList) {
            Long goodsId = null;
            Long skuId = null;
            Long styleId = null;
            MallShoppingCart cartGoods = null;

            if (addCartDto.getType() == null) {
                addCartDto.setType(1);
            }

            if (addCartDto.getType() == 1) {
                MallGoodsSku sku = mallGoodsSkuMapper.selectById(addCartDto.getSkuId());

                if (sku == null) {
                    throw new FebsException("sku不存在");
                }

                goodsId = sku.getGoodsId();
                skuId = sku.getId();
                styleId = sku.getStyleId();

                cartGoods = this.baseMapper.selectCartGoodsBySkuId(addCartDto.getSkuId(), memberId);
            } else {
                MallGoods mallGoods = mallGoodsMapper.selectById(addCartDto.getSkuId());
                if (mallGoods == null) {
                    throw new FebsException("积分商品不存在");
                }

                goodsId = mallGoods.getId();

                LambdaQueryWrapper<MallShoppingCart> cartQuery = new LambdaQueryWrapper<>();
                cartQuery.eq(MallShoppingCart::getGoodsId, goodsId)
                        .eq(MallShoppingCart::getMemberId, memberId)
                        .last("limit 1");
                cartGoods = this.baseMapper.selectOne(cartQuery);
            }

            if (cartGoods == null) {
                cartGoods = new MallShoppingCart();
                cartGoods.setGoodsId(goodsId);
                cartGoods.setSkuId(skuId);
                cartGoods.setStyleId(styleId);
                cartGoods.setCnt(addCartDto.getCnt());
                cartGoods.setMemberId(memberId);
                cartGoods.setType(addCartDto.getType());

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