package com.ruoyi.procurementrecord.utils;

import com.ruoyi.procurementrecord.mapper.ProcurementRecordMapper;
import com.ruoyi.procurementrecord.mapper.ProcurementRecordOutMapper;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;

import java.math.BigDecimal;

@Component
@RequiredArgsConstructor
public class StockUtils {
    private final ProcurementRecordOutMapper procurementRecordOutMapper;
    private final ProcurementRecordMapper procurementRecordMapper;

    // 获取商品剩余库存
    public  BigDecimal getStockQuantity(Long productModelId) {
        // 入库数量
        BigDecimal sumQuantity = procurementRecordMapper.getSumQuantity(productModelId);
        // 出库数量
        BigDecimal outQuantity = procurementRecordOutMapper.getSumQuantity(productModelId);
        return outQuantity.compareTo(sumQuantity) > 0 ? BigDecimal.ZERO : sumQuantity.subtract(outQuantity);
    }
}