package cn.iocoder.yudao.module.mdm.service.unit;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.mdm.controller.admin.unit.vo.MdmUnitMeasurePageReqVO;
import cn.iocoder.yudao.module.mdm.controller.admin.unit.vo.MdmUnitMeasureSaveReqVO;
import cn.iocoder.yudao.module.mdm.dal.dataobject.unit.MdmUnitMeasureDO;
import cn.iocoder.yudao.module.mdm.dal.mysql.item.MdmItemMapper;
import cn.iocoder.yudao.module.mdm.dal.mysql.unit.MdmUnitMeasureMapper;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;

import java.util.*;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.module.mdm.enums.ErrorCodeConstants.*;

/**
 * MDM 计量单位 Service 实现类
 *
 * @author 芋道源码
 */
@Service
@Validated
public class MdmUnitMeasureServiceImpl implements MdmUnitMeasureService {

    @Resource
    private MdmUnitMeasureMapper unitMeasureMapper;

    @Resource
    private MdmItemMapper itemMapper;

    @Override
    public Long createUnitMeasure(MdmUnitMeasureSaveReqVO createReqVO) {
        // 校验数据
        validateUnitMeasureSaveData(createReqVO);

        // 插入
        MdmUnitMeasureDO unitMeasure = BeanUtils.toBean(createReqVO, MdmUnitMeasureDO.class);
        unitMeasureMapper.insert(unitMeasure);
        return unitMeasure.getId();
    }

    @Override
    public void updateUnitMeasure(MdmUnitMeasureSaveReqVO updateReqVO) {
        // 校验存在
        validateUnitMeasureExists(updateReqVO.getId());
        // 校验数据
        validateUnitMeasureSaveData(updateReqVO);

        // 更新
        MdmUnitMeasureDO updateObj = BeanUtils.toBean(updateReqVO, MdmUnitMeasureDO.class);
        unitMeasureMapper.updateById(updateObj);
    }

    @Override
    public void updateUnitMeasureStatus(Long id, Integer status) {
        // 校验存在
        validateUnitMeasureExists(id);
        // 更新状态
        unitMeasureMapper.updateById(new MdmUnitMeasureDO().setId(id).setStatus(status));
    }

    @Override
    public void deleteUnitMeasure(Long id) {
        // 校验存在
        validateUnitMeasureExists(id);
        // 校验是否被物料使用（直接使用 Mapper 避免循环依赖）
        if (itemMapper.selectCountByUnitMeasureId(id) > 0) {
            throw exception(MDM_UNIT_MEASURE_EXISTS_ITEM);
        }
        // 删除
        unitMeasureMapper.deleteById(id);
    }

    @Override
    public MdmUnitMeasureDO validateUnitMeasureExists(Long id) {
        MdmUnitMeasureDO unitMeasure = unitMeasureMapper.selectById(id);
        if (unitMeasure == null) {
            throw exception(MDM_UNIT_MEASURE_NOT_EXISTS);
        }
        return unitMeasure;
    }

    private void validateUnitMeasureSaveData(MdmUnitMeasureSaveReqVO reqVO) {
        // 校验编码唯一
        MdmUnitMeasureDO unit = unitMeasureMapper.selectByCode(reqVO.getCode());
        if (unit != null && ObjUtil.notEqual(unit.getId(), reqVO.getId())) {
            throw exception(MDM_UNIT_MEASURE_CODE_DUPLICATE);
        }
        // 校验名称唯一
        MdmUnitMeasureDO sameName = unitMeasureMapper.selectByName(reqVO.getName());
        if (sameName != null && ObjUtil.notEqual(sameName.getId(), reqVO.getId())) {
            throw exception(MDM_UNIT_MEASURE_NAME_DUPLICATE);
        }
    }

    @Override
    public MdmUnitMeasureDO getUnitMeasure(Long id) {
        return unitMeasureMapper.selectById(id);
    }

    @Override
    public PageResult<MdmUnitMeasureDO> getUnitMeasurePage(MdmUnitMeasurePageReqVO pageReqVO) {
        return unitMeasureMapper.selectPage(pageReqVO);
    }

    @Override
    public List<MdmUnitMeasureDO> getUnitMeasureList(Collection<Long> ids) {
        if (CollUtil.isEmpty(ids)) {
            return Collections.emptyList();
        }
        return unitMeasureMapper.selectBatchIds(ids);
    }

    @Override
    public MdmUnitMeasureDO getUnitMeasureByCode(String code) {
        return unitMeasureMapper.selectByCode(code);
    }

}