package com.railway.system.service.impl;

import com.railway.common.annotation.DataScope;
import com.railway.common.constant.UserConstants;
import com.railway.common.core.domain.TreeSelect;
import com.railway.common.core.domain.entity.SysDept;
import com.railway.common.core.domain.entity.SysRole;
import com.railway.common.core.domain.entity.SysUser;
import com.railway.common.core.text.Convert;
import com.railway.common.exception.ServiceException;
import com.railway.common.utils.SecurityUtils;
import com.railway.common.utils.StringUtils;
import com.railway.common.utils.TreeSelectUtil;
import com.railway.common.utils.spring.SpringUtils;
import com.railway.system.mapper.SysDeptMapper;
import com.railway.system.mapper.SysRoleMapper;
import com.railway.system.mapper.SysUserMapper;
import com.railway.system.service.ISysDeptService;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.stereotype.Service;

/**
 * 部门管理 服务实现
 *
 * @author railway
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService {

  private final SysDeptMapper deptMapper;
  private final SysRoleMapper roleMapper;
  private final SysUserMapper userMapper;

  public SysDeptServiceImpl(SysDeptMapper deptMapper,
      SysRoleMapper roleMapper, SysUserMapper userMapper) {
    this.deptMapper = deptMapper;
    this.roleMapper = roleMapper;
    this.userMapper = userMapper;
  }

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

  /**
   * 查询部门管理数据
   *
   * @return 部门信息集合
   */
  @Override
  public List<SysDept> selectLabDeptList() {
    SysDept dept = new SysDept();
    dept.setStatus(UserConstants.DEPT_NORMAL);
    String deptType = "lab";
    dept.setDeptType(deptType);
    return deptMapper.selectDeptList(dept);
  }

  /**
   * 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<>();
    List<Long> tempList = new ArrayList<>();
    for (SysDept dept : depts) {
      tempList.add(dept.getDeptId());
    }
    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);
    List<TreeSelect> tree = deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    TreeSelectUtil.setTreeSelect(tree);
    return tree;
  }

  /**
   * 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 String 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() != deptId) {
      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);
  }

  /**
   * 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<>();
    for (SysDept n : list) {
      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;
  }
}
