package com.boman.system.service.impl;

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

import com.boman.common.core.utils.obj.ObjectUtils;
import com.google.common.collect.Lists;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.boman.domain.constant.UserConstants;
import com.boman.common.core.exception.CustomException;
import com.boman.common.core.utils.StringUtils;
import com.boman.common.datascope.annotation.DataScope;
import com.boman.domain.SysDept;
import com.boman.domain.SysRole;
import com.boman.system.domain.vo.TreeSelect;
import com.boman.system.mapper.SysDeptMapper;
import com.boman.system.mapper.SysRoleMapper;
import com.boman.system.service.ISysDeptService;

/**
 * 部门管理 服务实现
 * 
 * @author ruoyi
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService
{
    @Autowired
    private SysDeptMapper deptMapper;

    @Autowired
    private SysRoleMapper roleMapper;

    /**
     * 查询部门管理数据
     * 
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept)
    {
        return deptMapper.selectDeptList(dept);
    }

    /**
     * 构建前端所需要树结构
     * 
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts)
    {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = new ArrayList<Long>();
        for (SysDept dept : depts)
        {
            tempList.add(dept.getId());
        }
        for (Iterator<SysDept> iterator = depts.iterator(); iterator.hasNext();)
        {
            SysDept dept = (SysDept) iterator.next();
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId()))
            {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty())
        {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     * 
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts)
    {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     * 
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Integer> selectDeptListByRoleId(Long roleId)
    {
        SysRole role = roleMapper.selectRoleById(roleId);
        return deptMapper.selectDeptListById(roleId, role.isDeptCheckStrictly());
    }

    /**
     * 根据部门ID查询信息
     * 
     * @param id 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long id)
    {
        return deptMapper.selectDeptById(id);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     * 
     * @param id 部门ID
     * @return 子部门数
     */
    @Override
    public int selectNormalChildrenDeptById(Long id)
    {
        return deptMapper.selectNormalChildrenDeptById(id);
    }

    /**
     * 是否存在子节点
     * 
     * @param id 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildById(Long id)
    {
        int result = deptMapper.hasChildById(id);
        return result > 0 ? true : false;
    }

    /**
     * 查询部门是否存在用户
     * 
     * @param id 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long id)
    {
        int result = deptMapper.checkDeptExistUser(id);
        return result > 0 ? true : false;
    }

    /**
     * 校验部门名称是否唯一
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public String checkDeptNameUnique(SysDept dept)
    {
        Long id = StringUtils.isNull(dept.getId()) ? -1L : dept.getId();
        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getId().longValue() != id.longValue())
        {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 新增保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept)
    {
        SysDept info = deptMapper.selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus()))
        {
            throw new CustomException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return deptMapper.insertDept(dept);
    }

    /**
     * 修改保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDept dept)
    {
        SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
        SysDept oldDept = deptMapper.selectDeptById(dept.getId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
        {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()))
        {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatus(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     * 
     * @param dept 当前部门
     */
    private void updateParentDeptStatus(SysDept dept)
    {
        String updateBy = dept.getUpdateBy();
        dept = deptMapper.selectDeptById(dept.getId());
        dept.setUpdateBy(updateBy);
        deptMapper.updateDeptStatus(dept);
    }

    /**
     * 修改子元素关系
     * 
     * @param id 被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long id, String newAncestors, String oldAncestors)
    {
        List<SysDept> children = deptMapper.selectChildrenDeptById(id);
        for (SysDept child : children)
        {
            child.setAncestors(child.getAncestors().replace(oldAncestors, newAncestors));
        }
        if (children.size() > 0)
        {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     * 
     * @param id 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long id)
    {
        return deptMapper.deleteDeptById(id);
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t)
    {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList)
        {
            if (hasChild(list, tChild))
            {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t)
    {
        List<SysDept> tlist = new ArrayList<SysDept>();
        Iterator<SysDept> it = list.iterator();
        while (it.hasNext())
        {
            SysDept n = (SysDept) it.next();
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getId().longValue())
            {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t)
    {
        return getChildList(list, t).size() > 0;
    }

    /**
     * 功能描述: 根据deptId查找部门下的所有部门
     *
     * @param deptId deptId
     * @return com.boman.domain.dto.AjaxResult
     */
    @Override
    public List<SysDept> listChildrenDepts(Long deptId) {
        List<SysDept> allDepts = selectDeptList(new SysDept());
        SysDept sysDept = ObjectUtils.filterOne(allDepts, dept -> deptId.equals(dept.getId()));
        List<SysDept> returnData = Lists.newArrayListWithCapacity(16);
        List<SysDept> sysDepts = recursionChildrenDepts(allDepts, sysDept, returnData);
        SysDept selfDept = new SysDept();
        selfDept.setId(deptId);
        sysDepts.add(selfDept);
        return sysDepts;
    }

    private List<SysDept> recursionChildrenDepts(List<SysDept> allDepts, SysDept sysDept, List<SysDept> returnData) {
        // 得到子节点列表
        List<SysDept> childList = getChildList(allDepts, sysDept);
        returnData.addAll(childList);
        for (SysDept tChild : childList) {
            if (hasChild(allDepts, tChild)) {
                recursionChildrenDepts(allDepts, tChild, returnData);
            }
        }

        return returnData;
    }

}
