package com.muyu.system.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.muyu.common.core.constant.UserConstants;
import com.muyu.common.core.exception.ServiceException;
import com.muyu.common.core.text.Convert;
import com.muyu.common.core.utils.SpringUtils;
import com.muyu.common.core.utils.StringUtils;
import com.muyu.common.datascope.annotation.DataScope;
import com.muyu.common.security.utils.SecurityUtils;
import com.muyu.common.system.domain.SysDept;
import com.muyu.common.system.domain.SysRole;
import com.muyu.common.system.domain.SysUser;
import com.muyu.common.system.domain.vo.SysDeptList;
import com.muyu.system.domain.vo.TreeSelect;
import com.muyu.system.mapper.SysDeptMapper;
import com.muyu.system.mapper.SysRoleMapper;
import com.muyu.system.service.SysDeptService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

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

/**
 * 部门管理 服务实现
 *
 * @author muyu
 */
@Service
public class SysDeptServiceImpl extends ServiceImpl<SysDeptMapper, SysDept> implements SysDeptService {
    @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);
    }

    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     *
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList (SysDept dept) {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 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 = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        for (SysDept dept : depts) {
            // 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<Long> selectDeptListByRoleId (Long roleId) {
        SysRole role = roleMapper.selectRoleById(roleId);
        return deptMapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
    }

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

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

    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     *
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId (Long deptId) {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }

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

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

    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope (Long deptId) {
        if (!SysUser.isAdmin(SecurityUtils.getUserId())) {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (StringUtils.isEmpty(depts)) {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 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 ServiceException("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.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept)) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors())) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal (SysDept dept) {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       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 deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDept child : children) {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (children.size() > 0) {
            deptMapper.updateDeptChildren(children);
        }
    }

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

    @Override
    public List<SysDeptList> cascaderDept() {
        List<SysDept> sysDepts = deptMapper.selectDeptList(new SysDept());
        List<SysDeptList> deptList = findDeptList(0L,sysDepts);
        return deptList;
    }

    private static List<SysDeptList> findDeptList(Long id,List<SysDept> sysDepts) {
        List<SysDeptList> collect = sysDepts.stream().filter(sysDept -> sysDept.getParentId().equals(id)).map(
                sysDept -> {
                    SysDeptList sysDeptList = new SysDeptList();
                    BeanUtils.copyProperties(sysDept, sysDeptList);
                    List<SysDeptList> deptList = findDeptList(sysDept.getDeptId(), sysDepts);
                    sysDeptList.setList(CollectionUtils.isEmpty(deptList)?null:deptList);
                    return sysDeptList;
                }
        ).collect(Collectors.toList());
        return collect;
    }


    /**
     * 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.getDeptId().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 ? true : false;
    }
}