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

import cc.mrbird.febs.common.enumerates.OrderStatusEnum;
import cc.mrbird.febs.common.exception.FebsException;
import cc.mrbird.febs.common.utils.LoginUserUtil;
import cc.mrbird.febs.common.utils.MallUtils;
import cc.mrbird.febs.mall.dto.AddOrderDto;
import cc.mrbird.febs.mall.dto.AddOrderItemDto;
import cc.mrbird.febs.mall.entity.*;
import cc.mrbird.febs.mall.mapper.*;
import cc.mrbird.febs.mall.service.IApiMallOrderInfoService;
import cn.hutool.core.collection.CollUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

/**
 * @author wzy
 * @date 2021-09-18
 **/
@Slf4j
@Service
@RequiredArgsConstructor
public class ApiMallOrderInfoServiceImpl extends ServiceImpl<MallOrderInfoMapper, MallOrderInfo> implements IApiMallOrderInfoService {

    private final MallGoodsMapper mallGoodsMapper;
    private final MallGoodsSkuMapper mallGoodsSkuMapper;
    private final MallAddressInfoMapper mallAddressInfoMapper;
    private final MallOrderItemMapper mallOrderItemMapper;

    @Override
    public Long createOrder(AddOrderDto addOrderDto) {
        MallMember member = LoginUserUtil.getLoginUser();

        MallAddressInfo address = mallAddressInfoMapper.selectById(addOrderDto.getAddressId());
        if (address == null) {
            throw new FebsException("地址不存在");
        }

        String orderNo = MallUtils.getOrderNum();
        MallOrderInfo orderInfo = new MallOrderInfo();
        orderInfo.setOrderNo(orderNo);
        orderInfo.setOrderTime(new Date());
        orderInfo.setMemberId(member.getId());
        orderInfo.setStatus(OrderStatusEnum.WAIT_PAY.getValue());
        orderInfo.setName(address.getName());
        orderInfo.setAddress(address.getArea() + address.getAddress());
        orderInfo.setPhone(address.getPhone());
        orderInfo.setLatitude(address.getLatitude());
        orderInfo.setLongitude(address.getLongitude());
        orderInfo.setRemark(addOrderDto.getRemark());

        if (CollUtil.isEmpty(addOrderDto.getItems())) {
            throw new FebsException("参数错误");
        }

        this.baseMapper.insert(orderInfo);
        BigDecimal total = BigDecimal.ZERO;
        for (AddOrderItemDto item : addOrderDto.getItems()) {
            MallGoodsSku sku = mallGoodsSkuMapper.selectSkuInfoById(item.getSkuId());
            if (sku == null) {
                throw new FebsException("购买商品或sku不存在");
            }

            if (sku.getStock() < item.getCnt()) {
                throw new FebsException("库存不足");
            }

            MallOrderItem orderItem = new MallOrderItem();
            BigDecimal amount = sku.getPresentPrice().multiply(BigDecimal.valueOf(item.getCnt()));
            orderItem.setAmount(amount);
            orderItem.setCnt(item.getCnt());
            orderItem.setOrderId(orderInfo.getId());
            orderItem.setPrice(sku.getPresentPrice());
            orderItem.setGoodsId(sku.getGoodsId());
            orderItem.setGoodsName(sku.getGoodsName());
            orderItem.setSkuId(sku.getId());
            orderItem.setStyleName(sku.getStyleName());

            total = total.add(amount);
            mallOrderItemMapper.insert(orderItem);

            sku.setStock(sku.getStock() - item.getCnt());
            mallGoodsSkuMapper.updateById(sku);
        }


        return orderInfo.getId();
    }

    @Override
    public void cancelOrder(Long id) {
        MallMember member = LoginUserUtil.getLoginUser();
        MallOrderInfo orderInfo = this.baseMapper.selectOrderByMemberIdAndId(member.getId(), id);
        if (orderInfo == null) {
            throw new FebsException("订单不存在");
        }

        if (OrderStatusEnum.WAIT_PAY.getValue() != orderInfo.getStatus()) {
            throw new FebsException("订单不是待付款, 无法取消");
        }

        orderInfo.setStatus(OrderStatusEnum.CANCEL.getValue());
        orderInfo.setCancelType(MallOrderInfo.CANCEL_BY_SELF);
        this.baseMapper.updateById(orderInfo);
    }
}