package com.ebts.system.service.impl;

import com.ebts.common.constant.UserConstants;
import com.ebts.common.core.entity.entity.DictData;
import com.ebts.common.core.entity.entity.DictType;
import com.ebts.common.exception.CustomException;
import com.ebts.common.utils.DictUtils;
import com.ebts.common.utils.StringUtils;
import com.ebts.system.dao.DictDataDao;
import com.ebts.system.dao.DictTypeDao;
import com.ebts.system.service.DictTypeService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import java.util.List;

/**
 * 字典 业务层处理
 *
 * @author binlin
 */
@Service
public class DictTypeServiceImpl implements DictTypeService {

    @Resource
    private DictTypeDao dictTypeMapper;

    @Resource
    private DictDataDao dictDataMapper;

    /**
     * 项目启动时，初始化字典到缓存
     */
    @PostConstruct
    @Transactional(propagation = Propagation.SUPPORTS)
    public void init() {
        List<DictType> dictTypeList = dictTypeMapper.selectDictTypeAll();
        for (DictType dictType : dictTypeList) {
            List<DictData> dictDatas = dictDataMapper.selectDictDataByType(dictType.getDictType());
            DictUtils.setDictCache(dictType.getDictType(), dictDatas);
        }
    }

    /**
     * 根据条件分页查询字典类型
     *
     * @param dictType 字典类型信息
     * @return 字典类型集合信息
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public List<DictType> selectDictTypeList(DictType dictType) {
        return dictTypeMapper.selectDictTypeList(dictType);
    }

    /**
     * 根据所有字典类型
     *
     * @return 字典类型集合信息
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public List<DictType> selectDictTypeAll() {
        return dictTypeMapper.selectDictTypeAll();
    }

    /**
     * 根据字典类型查询字典数据
     *
     * @param dictType 字典类型
     * @return 字典数据集合信息
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public List<DictData> selectDictDataByType(String dictType) {
        List<DictData> dictDatas = DictUtils.getDictCache(dictType);
        if (StringUtils.isNotEmpty(dictDatas)) {
            return dictDatas;
        }
        dictDatas = dictDataMapper.selectDictDataByType(dictType);
        if (StringUtils.isNotEmpty(dictDatas)) {
            DictUtils.setDictCache(dictType, dictDatas);
            return dictDatas;
        }
        return null;
    }

    /**
     * 根据字典类型ID查询信息
     *
     * @param dictId 字典类型ID
     * @return 字典类型
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public DictType selectDictTypeById(Long dictId) {
        return dictTypeMapper.selectDictTypeById(dictId);
    }

    /**
     * 根据字典类型查询信息
     *
     * @param dictType 字典类型
     * @return 字典类型
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public DictType selectDictTypeByType(String dictType) {
        return dictTypeMapper.selectDictTypeByType(dictType);
    }

    /**
     * 批量删除字典类型信息
     *
     * @param dictIds 需要删除的字典ID
     * @return 结果
     */
    @Override
    @Transactional(propagation = Propagation.REQUIRED,rollbackFor = Exception.class)
    public int deleteDictTypeByIds(Long[] dictIds) {
        for (Long dictId : dictIds) {
            DictType dictType = selectDictTypeById(dictId);
            if (dictDataMapper.countDictDataByType(dictType.getDictType()) > 0) {
                throw new CustomException(String.format("%1$s已分配,不能删除", dictType.getDictName()));
            }
        }
        int count = dictTypeMapper.deleteDictTypeByIds(dictIds);
        if (count > 0) {
            DictUtils.clearDictCache();
        }
        return count;
    }

    /**
     * 清空缓存数据
     */
    @Override
    public void clearCache() {
        DictUtils.clearDictCache();
    }

    /**
     * 新增保存字典类型信息
     *
     * @param dictType 字典类型信息
     * @return 结果
     */
    @Override
    @Transactional(propagation = Propagation.REQUIRED,rollbackFor = Exception.class)
    public int insertDictType(DictType dictType) {
        int row = dictTypeMapper.insertDictType(dictType);
        if (row > 0) {
            DictUtils.clearDictCache();
        }
        return row;
    }

    /**
     * 修改保存字典类型信息
     *
     * @param dictType 字典类型信息
     * @return 结果
     */
    @Override
    @Transactional(propagation = Propagation.REQUIRED,rollbackFor = Exception.class)
    public int updateDictType(DictType dictType) {
        DictType oldDict = dictTypeMapper.selectDictTypeById(dictType.getDictId());
        dictDataMapper.updateDictDataType(oldDict.getDictType(), dictType.getDictType());
        int row = dictTypeMapper.updateDictType(dictType);
        if (row > 0) {
            DictUtils.clearDictCache();
        }
        return row;
    }

    /**
     * 校验字典类型称是否唯一
     *
     * @param dict 字典类型
     * @return 结果
     */
    @Override
    @Transactional(propagation = Propagation.SUPPORTS)
    public String checkDictTypeUnique(DictType dict) {
        Long dictId = StringUtils.isNull(dict.getDictId()) ? -1L : dict.getDictId();
        DictType dictType = dictTypeMapper.checkDictTypeUnique(dict.getDictType());
        if (StringUtils.isNotNull(dictType) && dictType.getDictId().longValue() != dictId.longValue()) {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }
}
