package com.sundot.airport.system.service.impl;

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

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.sundot.airport.common.config.LevelConfig;
import com.sundot.airport.common.dto.DeptInfo;
import com.sundot.airport.common.enums.DeptType;
import com.sundot.airport.common.enums.DeptTypeEnum;
import com.sundot.airport.common.enums.RoleTypeEnum;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.sundot.airport.common.annotation.DataScope;
import com.sundot.airport.common.constant.UserConstants;
import com.sundot.airport.common.core.domain.TreeSelect;
import com.sundot.airport.common.core.domain.DeptUserTreeSelect;
import com.sundot.airport.common.core.domain.entity.SysDept;
import com.sundot.airport.common.core.domain.entity.SysRole;
import com.sundot.airport.common.core.domain.entity.SysUser;
import com.sundot.airport.common.core.text.Convert;
import com.sundot.airport.common.exception.ServiceException;
import com.sundot.airport.common.utils.SecurityUtils;
import com.sundot.airport.common.utils.StringUtils;
import com.sundot.airport.common.utils.spring.SpringUtils;
import com.sundot.airport.system.mapper.SysDeptMapper;
import com.sundot.airport.system.mapper.SysRoleMapper;
import com.sundot.airport.system.mapper.SysUserMapper;
import com.sundot.airport.system.service.ISysDeptService;

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

    @Autowired
    private SysDeptMapper deptMapper;

    @Autowired
    private SysRoleMapper roleMapper;

    @Autowired
    private SysUserMapper userMapper;

    /**
     * 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);
    }

    /**
     * 查询部门及用户树结构信息
     *
     * @param dept 部门信息
     * @return 部门及用户树信息集合
     */
    @Override
    public List<DeptUserTreeSelect> selectDeptUserTreeList(SysDept dept) {
        List<SysDept> depts;
        // 如果指定了部门ID，则查询该部门及其所有子部门
        if (dept.getDeptId() != null && dept.getDeptId() != 0) {
            SysDept targetDept = deptMapper.selectDeptById(dept.getDeptId());
            if (targetDept != null) {
                // 查询所有部门
                SysDept queryDept = new SysDept();
                List<SysDept> allDepts = SpringUtils.getAopProxy(this).selectDeptList(queryDept);
                // 构建完整的部门树
                List<SysDept> deptTree = buildCompleteDeptTree(allDepts);
                // 查找目标部门及其所有子部门
                SysDept foundDept = findDeptWithChildren(deptTree, dept.getDeptId());
                if (foundDept != null) {
                    List<SysDept> targetList = new ArrayList<>();
                    targetList.add(foundDept);
                    depts = targetList;
                } else {
                    // 如果没找到，返回只包含目标部门的列表
                    List<SysDept> singleList = new ArrayList<>();
                    singleList.add(targetDept);
                    depts = singleList;
                }
            } else {
                // 如果部门不存在，返回空列表
                depts = new ArrayList<>();
            }
        } else {
            // 如果没有指定部门ID，查询所有部门
            depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        }
        return buildDeptUserTreeSelect(depts);
    }

    /**
     * 查找部门及其所有子部门
     *
     * @param depts  部门树
     * @param deptId 部门ID
     * @return 包含指定部门及其所有子部门的树
     */
    private SysDept findDeptWithChildren(List<SysDept> depts, Long deptId) {
        for (SysDept dept : depts) {
            if (dept.getDeptId().equals(deptId)) {
                return dept;
            }
            if (dept.getChildren() != null && !dept.getChildren().isEmpty()) {
                SysDept found = findDeptWithChildren(dept.getChildren(), deptId);
                if (found != null) {
                    return found;
                }
            }
        }
        return null;
    }

    /**
     * 构建完整的部门树（不丢失任何节点）
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    private List<SysDept> buildCompleteDeptTree(List<SysDept> depts) {
        // 先建立ID到部门的映射
        java.util.Map<Long, SysDept> deptMap = new java.util.HashMap<>();
        for (SysDept dept : depts) {
            deptMap.put(dept.getDeptId(), dept);
        }

        // 构建父子关系
        List<SysDept> rootDepts = new ArrayList<>();
        for (SysDept dept : depts) {
            SysDept parent = deptMap.get(dept.getParentId());
            if (parent != null) {
                // 有父节点，添加到父节点的子节点列表中
                if (parent.getChildren() == null) {
                    parent.setChildren(new ArrayList<>());
                }
                parent.getChildren().add(dept);
            } else {
                // 没有父节点，作为根节点
                rootDepts.add(dept);
            }
        }

        return rootDepts;
    }

    /**
     * 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());
    }

    /**
     * 构建前端所需要下拉树结构（包含用户）
     *
     * @param depts 部门列表
     * @return 下拉树结构列表（包含用户）
     */
    public List<DeptUserTreeSelect> buildDeptUserTreeSelect(List<SysDept> depts) {
        List<SysDept> deptTrees = buildCompleteDeptTree(depts);
        return deptTrees.stream().map(this::convertDeptToDeptUserTreeSelect).collect(Collectors.toList());
    }

    /**
     * 将部门转换为包含用户的树节点
     *
     * @param dept 部门信息
     * @return 树节点
     */
    private DeptUserTreeSelect convertDeptToDeptUserTreeSelect(SysDept dept) {
        DeptUserTreeSelect treeSelect = new DeptUserTreeSelect(dept);

        List<DeptUserTreeSelect> children = new ArrayList<>();

        // 处理子部门
        if (dept.getChildren() != null && !dept.getChildren().isEmpty()) {
            children.addAll(dept.getChildren().stream()
                    .map(this::convertDeptToDeptUserTreeSelect)
                    .collect(Collectors.toList()));
        }

        // 如果是班组类型，则添加用户节点
        if (DeptTypeEnum.TEAMS.getCode().equals(dept.getDeptType())) {
            List<SysUser> users = userMapper.selectUsersByDeptId(dept.getDeptId());
            if (users != null && !users.isEmpty()) {
                List<DeptUserTreeSelect> userChildren = users.stream()
                        .map(DeptUserTreeSelect::new)
                        .collect(Collectors.toList());
                children.addAll(userChildren);
            }
        }

        if (!children.isEmpty()) {
            treeSelect.setChildren(new ArrayList<>(children));
        }

        return treeSelect;
    }

    /**
     * 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()) && StringUtils.isNotNull(deptId)) {
            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) {
        if (ObjectUtil.isEmpty(dept.getParentId()) || dept.getParentId().equals(0L)) {
            dept.setAncestors("0");
        } else {
            SysDept info = deptMapper.selectDeptById(dept.getParentId());
            if (ObjectUtil.isEmpty(info)) {
                throw new ServiceException("操作失败,父部门不存在");
            }
            // 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());
        }
        verifyData(dept);
        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);
        }
        verifyData(dept);
        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));
            verifyData(child);
        }
        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<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;
    }

    /**
     * 查询部们数据，包含所有上级
     *
     * @param deptId 部门信息 id
     * @return 部们信息集合
     */
    @Override
    public List<SysDept> selectAllDept(Long deptId) {
        return deptMapper.selectAllDept(deptId);
    }

    /**
     * 验证数据
     */
    private void verifyData(SysDept sysDept) {
        int level = sysDept.getAncestors().split(",").length;
        if (level > levelConfig.getSysDeptLevel()) {
            throw new ServiceException("操作失败,层级超过限制" + levelConfig.getSysDeptLevel() + "级");
        }
        if (!StringUtils.equals(sysDept.getDeptType(), levelConfig.getSysDeptLevelMap().get(level))) {
            throw new ServiceException("操作失败,层级与部门类型不匹配");
        }
    }

    /**
     * 查询部门负责人
     *
     * @param deptId 部门ID
     * @return 负责人信息
     */
    @Override
    public SysUser deptLeader(Long deptId) {
        SysDept sysDept = deptMapper.selectDeptById(deptId);
        if (ObjectUtil.isNull(sysDept)) {
            throw new ServiceException("操作失败,部门ID【" + deptId + "】不存在");
        }
        List<SysUser> result = Collections.emptyList();
        if (StringUtils.equals(DeptTypeEnum.STATION.getCode(), sysDept.getDeptType())) {
            result = deptMapper.deptLeader(deptId, RoleTypeEnum.test.getCode());
        } else if (StringUtils.equals(DeptTypeEnum.BRIGADE.getCode(), sysDept.getDeptType())) {
            result = deptMapper.deptLeader(deptId, RoleTypeEnum.jingli.getCode());
        } else if (StringUtils.equals(DeptTypeEnum.MANAGER.getCode(), sysDept.getDeptType())) {
            result = deptMapper.deptLeader(deptId, RoleTypeEnum.kezhang.getCode());
        } else if (StringUtils.equals(DeptTypeEnum.TEAMS.getCode(), sysDept.getDeptType())) {
            result = deptMapper.deptLeader(deptId, RoleTypeEnum.banzuzhang.getCode());
        } else {
            return null;
        }
        if (CollUtil.isEmpty(result)) {
            return null;
        }
        return result.get(0);
    }

    /**
     * 获取部门下所有部门信息(包含父部门)
     *
     * @param dept 参数
     * @return 用户信息集合
     */
    @Override
    public List<SysDept> selectDeptInfo(SysDept dept) {
        List<SysDept> result = deptMapper.selectDeptInfo(dept);
        return result;
    }

    /**
     * 根据部门ID列表查询信息
     *
     * @param list 部门ID列表
     * @return 部门信息
     */
    @Override
    public List<SysDept> selectDeptByIdList(List<Long> list) {
        return deptMapper.selectDeptByIdList(list);
    }

    @Override
    public List<SysDept> selectDeptInfoAll(SysDept dept) {
        return deptMapper.selectDeptList(dept);
    }

    /**
     * 查询部门指定角色人员
     *
     * @param deptId 部门ID
     * @return 指定角色人员
     */
    @Override
    public List<SysUser> deptRole(Long deptId, List<String> roleKeyList) {
        SysDept sysDept = deptMapper.selectDeptById(deptId);
        if (ObjectUtil.isNull(sysDept)) {
            throw new ServiceException("操作失败,部门ID【" + deptId + "】不存在");
        }
        List<SysUser> result = deptMapper.deptRole(deptId, roleKeyList);
        return result;
    }

    /**
     * 查询指定部门的上级部门信息
     *
     * @param deptId 部门ID
     * @return 上级部门信息
     */
    @Override
    public DeptInfo getDeptInfoByDeptId(Long deptId) {
        DeptInfo result = new DeptInfo();
        List<SysDept> deptList = selectAllDept(deptId);
        if (CollectionUtil.isEmpty(deptList)) {
            return result;
        }
        Collections.reverse(deptList);
        SysDept teams = deptList.stream().filter(x -> StrUtil.equals(DeptType.TEAMS.getCode(), x.getDeptType())).findFirst().orElse(new SysDept());
        SysDept department = deptList.stream().filter(x -> StrUtil.equals(DeptType.MANAGER.getCode(), x.getDeptType())).findFirst().orElse(new SysDept());
        SysDept brigade = deptList.stream().filter(x -> StrUtil.equals(DeptType.BRIGADE.getCode(), x.getDeptType())).findFirst().orElse(new SysDept());
        SysDept station = deptList.stream().filter(x -> StrUtil.equals(DeptType.STATION.getCode(), x.getDeptType())).findFirst().orElse(new SysDept());
        result.setTeamId(teams.getDeptId());
        result.setTeamName(teams.getDeptName());
        result.setDepartmentId(department.getDeptId());
        result.setDepartmentName(department.getDeptName());
        result.setBrigadeId(brigade.getDeptId());
        result.setBrigadeName(brigade.getDeptName());
        result.setStationId(station.getDeptId());
        result.setStationName(station.getDeptName());
        return result;
    }

    /**
     * 根据ID查询所有子部门
     *
     * @param deptId 部门ID
     * @return 部门列表
     */
    @Override
    public List<SysDept> selectChildrenDeptById(Long deptId) {
        return deptMapper.selectUseChildrenDeptById(deptId);
    }
}