package com.gkhy.exam.system.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gkhy.exam.common.api.CommonPage;
import com.gkhy.exam.common.constant.UserConstant;
import com.gkhy.exam.common.domain.entity.SysDictData;
import com.gkhy.exam.common.domain.entity.SysDictType;
import com.gkhy.exam.common.exception.ApiException;
import com.gkhy.exam.common.utils.DictUtils;
import com.gkhy.exam.common.utils.PageUtils;
import com.gkhy.exam.common.utils.SecurityUtils;
import com.gkhy.exam.system.mapper.SysDictDataMapper;
import com.gkhy.exam.system.mapper.SysDictTypeMapper;
import com.gkhy.exam.system.service.SysDictTypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * <p>
 * 字典类型表 服务实现类
 * </p>
 *
 * @author kzy
 * @since 2023-11-01 15:37:51
 */
@Service
public class SysDictTypeServiceImpl extends ServiceImpl<SysDictTypeMapper, SysDictType> implements SysDictTypeService {
    @Autowired
    private SysDictDataMapper dictDataMapper;

    @PostConstruct
    public void init(){
        loadingDictCache();
    }

    @Override
    public CommonPage<SysDictType> selectDictTypeList(SysDictType dict) {
        PageUtils.startPage();
        List<SysDictType> dictTypeList= baseMapper.selectDictTypeList(dict);
        return CommonPage.restPage(dictTypeList);
    }

    @Override
    public List<SysDictType> selectDictTypeAll() {
        return list();
    }

    @Override
    public List<SysDictData> selectDictDataByType(String dictType) {
        List<SysDictData> dictDatas= DictUtils.getDictCache(dictType);
        if(!Objects.isNull(dictDatas)&&dictDatas.size()>0){
            return dictDatas;
        }
        dictDatas=dictDataMapper.selectDictDataByType(dictType);
        if(!Objects.isNull(dictDatas)){
            DictUtils.setDictCache(dictType,dictDatas);
            return dictDatas;
        }
        return null;
    }

    @Override
    public SysDictType selectDictTypeById(Long dictId) {
        return getById(dictId);
    }

    @Override
    public SysDictType selectDictTypeByType(String dictType) {
        return baseMapper.selectDictTypeByType(dictType);
    }

    @Override
    public void deleteDictTypeByIds(Long[] dictIds) {
        for (Long dictId : dictIds)
        {
            SysDictType dictType = selectDictTypeById(dictId);
            if (dictDataMapper.countDictDataByType(dictType.getDictType()) > 0)
            {
                throw new ApiException(String.format("%1$s已分配,不能删除", dictType.getName()));
            }
            removeById(dictId);
            DictUtils.removeDictCache(dictType.getDictType());
        }
    }

    @Override
    public void loadingDictCache() {
        SysDictData dictData = new SysDictData();
        dictData.setStatus(0);
        List<SysDictData> sysDictDataList = dictDataMapper.selectDictDataList(dictData);
        Map<String, List<SysDictData>> dictDataMap = sysDictDataList.stream().collect(Collectors.groupingBy(SysDictData::getDictType));
        for (Map.Entry<String, List<SysDictData>> entry : dictDataMap.entrySet())
        {
            DictUtils.setDictCache(entry.getKey(), entry.getValue().stream().sorted(Comparator.comparing(SysDictData::getSort)).collect(Collectors.toList()));
        }
    }

    @Override
    public void clearDictCache() {
        DictUtils.clearDictCache();
    }

    @Override
    public void resetDictCache() {
        clearDictCache();
        loadingDictCache();
    }

    @Override
    public int insertDictType(SysDictType dict) {
        if(!checkDictTypeUnique(dict)){
            throw new ApiException("新增字典类型已存在");
        }
        dict.setCreateBy(SecurityUtils.getUsername());
        int row = baseMapper.insert(dict);
        if (row > 0)
        {
            DictUtils.setDictCache(dict.getDictType(), null);
        }
        return row;
    }

    @Override
    public int updateDictType(SysDictType dict) {
        if(!checkDictTypeUnique(dict)){
            throw new ApiException("新增字典类型已存在");
        }
        SysDictType oldDict = selectDictTypeById(dict.getId());
        dictDataMapper.updateDictDataType(oldDict.getDictType(), dict.getDictType());
        dict.setUpdateBy(SecurityUtils.getUsername());
        int row = baseMapper.updateById(dict);
        if (row > 0)
        {
            List<SysDictData> dictDatas = dictDataMapper.selectDictDataByType(dict.getDictType());
            DictUtils.setDictCache(dict.getDictType(), dictDatas);
        }
        return row;
    }

    @Override
    public boolean checkDictTypeUnique(SysDictType dict) {
        Long dictId =dict.getId()==null ? -1L : dict.getId();
        SysDictType dictType = baseMapper.checkDictTypeUnique(dict.getDictType());
        if (!Objects.isNull(dictType) && dictType.getId().longValue() != dictId.longValue())
        {
            return UserConstant.NOT_UNIQUE;
        }
        return UserConstant.UNIQUE;
    }
}