package cn.iocoder.yudao.module.bpm.service.definition;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
import cn.iocoder.yudao.framework.common.exception.ServiceException;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.group.BpmUserGroupImportExcelVO;
import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.group.BpmUserGroupImportReqVO;
import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.group.BpmUserGroupImportRespVO;
import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.group.BpmUserGroupPageReqVO;
import cn.iocoder.yudao.module.bpm.controller.admin.definition.vo.group.BpmUserGroupSaveReqVO;
import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmUserGroupDO;
import cn.iocoder.yudao.module.bpm.dal.mysql.definition.BpmUserGroupMapper;
import cn.iocoder.yudao.module.system.api.user.AdminUserApi;
import cn.iocoder.yudao.module.system.api.user.dto.AdminUserRespDTO;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertMap;
import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.filterList;
import static cn.iocoder.yudao.module.bpm.enums.ErrorCodeConstants.USER_GROUP_IMPORT_EXISTS;
import static cn.iocoder.yudao.module.bpm.enums.ErrorCodeConstants.USER_GROUP_IMPORT_LIST_IS_EMPTY;
import static cn.iocoder.yudao.module.bpm.enums.ErrorCodeConstants.USER_GROUP_IMPORT_USER_NOT_EXISTS;
import static cn.iocoder.yudao.module.bpm.enums.ErrorCodeConstants.USER_GROUP_IS_DISABLE;
import static cn.iocoder.yudao.module.bpm.enums.ErrorCodeConstants.USER_GROUP_NOT_EXISTS;

/**
 * 用户组 Service 实现类
 *
 * @author 超级管理员
 */
@Service
@Validated
public class BpmUserGroupServiceImpl implements BpmUserGroupService {

    @Resource
    private BpmUserGroupMapper userGroupMapper;
    @Resource
    private AdminUserApi adminUserApi;

    @Override
    public Long createUserGroup(BpmUserGroupSaveReqVO createReqVO) {
        BpmUserGroupDO userGroup = BeanUtils.toBean(createReqVO, BpmUserGroupDO.class);
        userGroupMapper.insert(userGroup);
        return userGroup.getId();
    }

    @Override
    public void updateUserGroup(BpmUserGroupSaveReqVO updateReqVO) {
        // 校验存在
        validateUserGroupExists(updateReqVO.getId());
        // 更新
        BpmUserGroupDO updateObj = BeanUtils.toBean(updateReqVO, BpmUserGroupDO.class);
        userGroupMapper.updateById(updateObj);
    }

    @Override
    public void deleteUserGroup(Long id) {
        // 校验存在
        this.validateUserGroupExists(id);
        // 删除
        userGroupMapper.deleteById(id);
    }

    private void validateUserGroupExists(Long id) {
        if (userGroupMapper.selectById(id) == null) {
            throw exception(USER_GROUP_NOT_EXISTS);
        }
    }

    @Override
    public BpmUserGroupDO getUserGroup(Long id) {
        return userGroupMapper.selectById(id);
    }

    @Override
    public List<BpmUserGroupDO> getUserGroupList(Collection<Long> ids) {
        return userGroupMapper.selectByIds(ids);
    }


    @Override
    public List<BpmUserGroupDO> getUserGroupListByStatus(Integer status) {
        return userGroupMapper.selectListByStatus(status);
    }

    @Override
    public PageResult<BpmUserGroupDO> getUserGroupPage(BpmUserGroupPageReqVO pageReqVO) {
        return userGroupMapper.selectPage(pageReqVO);
    }

    @Override
    public void validUserGroups(Collection<Long> ids) {
        if (CollUtil.isEmpty(ids)) {
            return;
        }
        // 获得用户组信息
        List<BpmUserGroupDO> userGroups = userGroupMapper.selectByIds(ids);
        Map<Long, BpmUserGroupDO> userGroupMap = convertMap(userGroups, BpmUserGroupDO::getId);
        // 校验
        ids.forEach(id -> {
            BpmUserGroupDO userGroup = userGroupMap.get(id);
            if (userGroup == null) {
                throw exception(USER_GROUP_NOT_EXISTS);
            }
            if (!CommonStatusEnum.ENABLE.getStatus().equals(userGroup.getStatus())) {
                throw exception(USER_GROUP_IS_DISABLE, userGroup.getName());
            }
        });
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public BpmUserGroupImportRespVO importUserGroupList(List<BpmUserGroupImportExcelVO> importUserGroups,
                                                       BpmUserGroupImportReqVO importReqVO) {
        // 1. 校验非空
        importUserGroups = filterList(importUserGroups, item -> StrUtil.isNotBlank(item.getName()));
        if (CollUtil.isEmpty(importUserGroups)) {
            throw exception(USER_GROUP_IMPORT_LIST_IS_EMPTY);
        }
        // 2. 逐条处理
        BpmUserGroupImportRespVO respVO = BpmUserGroupImportRespVO.builder()
                .createUserGroupNames(new ArrayList<>())
                .updateUserGroupNames(new ArrayList<>())
                .failureUserGroupNames(new LinkedHashMap<>())
                .build();
        importUserGroups.forEach(importUserGroup -> {
            try {
                // 2.1 解析成员
                Set<Long> userIds = parseUserIds(importUserGroup.getUserNames());
                // 2.2 按名字匹配已存在记录
                BpmUserGroupDO existUserGroup = userGroupMapper.selectOne(
                        BpmUserGroupDO::getName, importUserGroup.getName());
                if (existUserGroup == null) {
                    BpmUserGroupDO userGroup = BeanUtils.toBean(importUserGroup, BpmUserGroupDO.class);
                    userGroup.setUserIds(userIds);
                    userGroupMapper.insert(userGroup);
                    respVO.getCreateUserGroupNames().add(importUserGroup.getName());
                    return;
                }
                // 2.3 已存在，判断是否允许更新
                if (!importReqVO.getUpdateSupport()) {
                    respVO.getFailureUserGroupNames().put(importUserGroup.getName(),
                            StrUtil.format(USER_GROUP_IMPORT_EXISTS.getMsg(), importUserGroup.getName()));
                    return;
                }
                BpmUserGroupDO updateUserGroup = BeanUtils.toBean(importUserGroup, BpmUserGroupDO.class)
                        .setId(existUserGroup.getId());
                updateUserGroup.setUserIds(userIds);
                userGroupMapper.updateById(updateUserGroup);
                respVO.getUpdateUserGroupNames().add(importUserGroup.getName());
            } catch (ServiceException ex) {
                respVO.getFailureUserGroupNames().put(importUserGroup.getName(), ex.getMessage());
            }
        });
        return respVO;
    }

    /**
     * 解析成员姓名，转换为用户编号数组
     *
     * @param userNames 成员姓名，多个以英文逗号、中文逗号或顿号分隔
     * @return 用户编号数组
     */
    private Set<Long> parseUserIds(String userNames) {
        Set<Long> userIds = new LinkedHashSet<>();
        if (StrUtil.isBlank(userNames)) {
            return userIds;
        }
        for (String name : userNames.split("[,，、]")) {
            String trimmedName = name.trim();
            if (StrUtil.isBlank(trimmedName)) {
                continue;
            }
            List<AdminUserRespDTO> users = adminUserApi.getUserListByNickname(trimmedName);
            AdminUserRespDTO match = users.stream()
                    .filter(user -> Objects.equals(user.getNickname(), trimmedName))
                    .findFirst().orElse(null);
            if (match == null) {
                throw exception(USER_GROUP_IMPORT_USER_NOT_EXISTS, trimmedName);
            }
            userIds.add(match.getId());
        }
        return userIds;
    }

}