package com.yuanchu.mom.service.impl;

import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yuanchu.mom.dto.DepartmentDto;
import com.yuanchu.mom.mapper.DepartmentMapper;
import com.yuanchu.mom.pojo.Department;
import com.yuanchu.mom.service.DepartmentService;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * <p>
 * 部门明细 服务实现类
 * </p>
 *
 * @author 江苏鵷雏网络科技有限公司
 * @since 2024-04-15 04:01:48
 */
@Service
@AllArgsConstructor
@Transactional(rollbackFor = Exception.class)
@Slf4j
public class DepartmentServiceImpl extends ServiceImpl<DepartmentMapper, Department> implements DepartmentService {

    DepartmentMapper departmentMapper;




    //添加部门
    @Override
    public int addDepartment(Department department) {
        departmentMapper.insert(department);
        return department.getId();
    }

    //获取部门树
    @Override
    public List<DepartmentDto> selectDepartment() {
        List<DepartmentDto> departments = departmentMapper.selectDepartment();
        //获取父节点
        List<DepartmentDto> collect = departments.stream().filter(m -> m.getFatherId() == null).peek(
                (m) -> m.setChildren(getChildren(m, departments))
        ).collect(Collectors.toList());
        return collect;
    }

    /**
     * 递归查询子节点
     * @param root  根节点
     * @param all   所有节点
     * @return 根节点信息
     */
    private List<DepartmentDto> getChildren(DepartmentDto root, List<DepartmentDto> all) {
        return all.stream().filter(m -> Objects.equals(m.getFatherId(), root.getId())).peek(
                (m) -> m.setChildren(getChildren(m, all))
        ).collect(Collectors.toList());
    }

    //删除部门
    @Override
    public boolean delDepartment(Integer id) {
        //判断是否有子类,直到没有为止
        List<Department> department = getDepartment(id);
        return removeBatchByIds(department);
    }

    //判断是否有子类,直到没有为止
    public List<Department> getDepartment(Integer id) {
        List<Department> list = new ArrayList<>();
        Department depart = baseMapper.selectById(id);
        list.add(depart);
        List<Department> departments = baseMapper.selectList(Wrappers.<Department>lambdaQuery().eq(Department::getFatherId, id));
        if (ObjectUtils.isNotEmpty(departments)) {
            list.addAll(departments);
            for (Department department : departments) {
                list.addAll(getDepartment(department.getId()));
            }
        }
        return list;
    }

}