package com.ycl.service.depart.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ycl.api.CommonResult;
import com.ycl.entity.depart.SccgDepart;
import com.ycl.enums.common.ResultCode;
import com.ycl.exception.ApiException;
import com.ycl.mapper.depart.SccgDepartMapper;
import com.ycl.service.depart.SccgDepartService;
import com.ycl.vo.depart.DepartVO;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import javax.xml.transform.Result;
import java.util.List;
import java.util.stream.Collectors;

/**
 * <p>
 * 部门表 服务实现类
 * </p>
 *
 * @author lyq
 * @since 2022-09-07
 */
@Service
public class SccgDepartServiceImpl extends ServiceImpl<SccgDepartMapper, SccgDepart> implements SccgDepartService {
    @Resource
    private SccgDepartMapper sccgDepartMapper;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void create(DepartVO.AddDepartVO addDepartVO) {
        SccgDepart sccgDepart = this.queryByName(addDepartVO.getDepartName());
        if (null != sccgDepart) {
            throw new ApiException(ResultCode.RECORD_ALREADY_EXISTS);
        }
        SccgDepart depart = new SccgDepart();
        BeanUtils.copyProperties(addDepartVO, depart);
        if (sccgDepartMapper.insert(depart) <= 0) {
            throw new ApiException(ResultCode.RECORD_SAVE_FAIL);
        }
    }

    @Override
    public SccgDepart loadDepartById(long id) {
        SccgDepart sccgDepart = sccgDepartMapper.selectById(id);
        if (null == sccgDepart) {
            throw new ApiException(ResultCode.RECORD_NOT_EXISTS);
        }
        return sccgDepart;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(DepartVO.UpdateDepartVO updateDepartVO) {
        SccgDepart sccgDepart = this.queryByName(updateDepartVO.getDepartName());
        if (null != sccgDepart && sccgDepart.getId() != updateDepartVO.getId()) {
            throw new ApiException(ResultCode.RECORD_ALREADY_EXISTS);
        }
        BeanUtils.copyProperties(updateDepartVO, sccgDepart);
        if (sccgDepartMapper.updateById(sccgDepart) <= 0) {
            throw new ApiException(ResultCode.RECORD_UPDATE_FAIL);
        }
    }

    @Override
    public void delete(long id) {
        if (sccgDepartMapper.deleteById(id) <= 0) {
            throw new ApiException(ResultCode.RECORD_DELETE_FAIL);
        }
    }

    @Override
    public List<SccgDepart> tree() {
        // 1.查出所有网格
        List<SccgDepart> list = list();

        // 2.组装成父子的树型结构
        // 2.1、找到所有的一级网格:使用jdk8的stream流进行过滤
        List<SccgDepart> collect = list.stream().filter(griddingEntity -> {
            //分类父id为0就表示该网格为 一级网格
            return griddingEntity.getParentId() == 0;
        }).map(item -> {
            // 找到子网格 set进children属性中
            item.setChildren(getChildrens(item, list));
            return item;
        }).collect(Collectors.toList());
        List<SccgDepart> treeData = getTreeData(collect);
        return treeData;
    }

    @Override
    public IPage<SccgDepart> pageDepart(DepartVO.PageDepartVO params) {
        return null;
    }

    @Override
    public void updateStatus(DepartVO.StatusDepartVO params) {
        SccgDepart sccgDepart = this.loadDepartById(params.getId());
        BeanUtils.copyProperties(params, sccgDepart);
        if (sccgDepartMapper.updateById(sccgDepart) <= 0) {
            throw new ApiException(ResultCode.RECORD_UPDATE_FAIL);
        }
    }

    /**
     * 利用递归将最后一级空集合变为null，前端联级选择器最后才不会出现 暂无数据的bug
     *
     * @return
     */
    public List<SccgDepart> getTreeData(List<SccgDepart> griddingEntities) {
        for (int i = 0; i < griddingEntities.size(); i++) {
            //如果Children的size小于1就说明为空，设置为null
            if (griddingEntities.get(i).getChildren().size() < 1) {
                griddingEntities.get(i).setChildren(null);
            } else {
                //子网格有数据就递归
                getTreeData(griddingEntities.get(i).getChildren());
            }
        }
        return griddingEntities;
    }

    /**
     * 递归查找所有网格的子网格
     *
     * @param root 当前网格
     * @param all  所有网格
     * @return
     */
    public List<SccgDepart> getChildrens(SccgDepart root, List<SccgDepart> all) {
        List<SccgDepart> collect = all.stream().filter(griddingEntity -> {
            return griddingEntity.getParentId().equals(root.getId());
        }).map(item -> {
            item.setChildren(getChildrens(item, all));
            return item;
        }).collect(Collectors.toList());
        return collect;
    }


    /**
     * 根据名字查询
     *
     * @param name
     * @return
     */
    private SccgDepart queryByName(String name) {
        LambdaQueryWrapper<SccgDepart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SccgDepart::getDepartName, name);
        SccgDepart sccgDepart = this.sccgDepartMapper.selectOne(queryWrapper);
        return sccgDepart;
    }
}