package cn.iocoder.yudao.module.ums.service.member;

import cn.hutool.core.util.StrUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.archive.api.document.ArchiveDocumentApi;
import cn.iocoder.yudao.module.archive.api.document.dto.ArchiveDocumentCreateReqDTO;
import cn.iocoder.yudao.module.archive.api.document.dto.ArchiveDocumentRespDTO;
import cn.iocoder.yudao.module.system.api.storage.StorageAttachmentApi;
import cn.iocoder.yudao.module.system.api.storage.dto.StorageBlobRespDTO;
import cn.iocoder.yudao.module.system.api.user.AdminUserApi;
import cn.iocoder.yudao.module.system.api.user.dto.AdminUserCreateReqDTO;
import cn.iocoder.yudao.module.ums.controller.admin.member.vo.UmsMemberPageReqVO;
import cn.iocoder.yudao.module.ums.controller.admin.member.vo.UmsMemberSaveReqVO;
import cn.iocoder.yudao.module.ums.dal.dataobject.application.UmsApplicationDO;
import cn.iocoder.yudao.module.ums.dal.dataobject.member.UmsMemberDO;
import cn.iocoder.yudao.module.ums.dal.mysql.member.UmsMemberMapper;
import cn.iocoder.yudao.module.ums.dal.redis.UmsNoRedisDAO;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.time.LocalDate;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.module.ums.enums.ErrorCodeConstants.*;

@Service
@Validated
@Slf4j
public class UmsMemberServiceImpl implements UmsMemberService {

    /**
     * 会员系统账号默认部门 ID（system_dept 中「学会会员」）
     */
    private static final Long MEMBER_DEPT_ID = 129L;

    public static final String MEMBER_RECORD_TYPE = "ums_member";

    /** 会员状态：正常（可归档） */
    private static final Integer MEMBER_STATUS_NORMAL = 1;

    /** 归档来源类型：3-会员（对应 archive 模块 source_type） */
    private static final Integer ARCHIVE_SOURCE_TYPE_MEMBER = 3;

    /** 归档密级：2-内部 */
    private static final Integer ARCHIVE_SECRET_LEVEL_INTERNAL = 2;

    /** 会员档案分类编码（对应 archive_category.code） */
    private static final String ARCHIVE_CATEGORY_CODE_MEMBER = "member";

    @Resource
    private UmsMemberMapper memberMapper;

    @Resource
    private UmsNoRedisDAO noRedisDAO;

    @Resource
    private AdminUserApi adminUserApi;

    @Resource
    private StorageAttachmentApi storageAttachmentApi;

    @Resource
    private ArchiveDocumentApi archiveDocumentApi;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public UmsMemberDO createMemberFromApplication(UmsApplicationDO application) {
        // 1. 生成会员编号
        String no = noRedisDAO.generate(UmsNoRedisDAO.MEMBER_NO_PREFIX);
        if (memberMapper.selectByNo(no) != null) {
            throw exception(MEMBER_NO_EXISTS);
        }

        // 2. 创建系统用户账号
        Long userId = createSystemUser(application);

        // 3. 创建会员记录
        UmsMemberDO member = UmsMemberDO.builder()
                .no(no)
                .userId(userId)
                .applicationId(application.getId())
                .memberType(application.getMemberType())
                .memberGrade(application.getMemberGrade())
                .name(application.getApplicantName())
                .contactPhone(application.getContactPhone())
                .contactEmail(application.getContactEmail())
                .legalPerson(application.getLegalPerson())
                .organizationCode(application.getOrganizationCode())
                .researchDirection(application.getResearchDirection())
                .workUnit(application.getWorkUnit())
                .title(application.getTitle())
                .regionCode(application.getRegionCode())
                .industry(application.getIndustry())
                .joinDate(LocalDate.now())
                .status(1) // 正常
                .build();
        memberMapper.insert(member);

        return member;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Long createMember(UmsMemberSaveReqVO createReqVO) {
        String no = noRedisDAO.generate(UmsNoRedisDAO.MEMBER_NO_PREFIX);
        if (memberMapper.selectByNo(no) != null) {
            throw exception(MEMBER_NO_EXISTS);
        }

        // 会员等级与类型匹配校验
        validateMemberGrade(createReqVO.getMemberType(), createReqVO.getMemberGrade());

        UmsMemberDO member = BeanUtils.toBean(createReqVO, UmsMemberDO.class, in -> in
                .setNo(no)
                .setStatus(createReqVO.getStatus() != null ? createReqVO.getStatus() : 1)
                .setJoinDate(createReqVO.getJoinDate() != null ? createReqVO.getJoinDate() : LocalDate.now()));
        memberMapper.insert(member);

        storageAttachmentApi.bindAttachments("file", MEMBER_RECORD_TYPE,
                member.getId(), createReqVO.getBlobIds());

        return member.getId();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateMember(UmsMemberSaveReqVO updateReqVO) {
        validateMemberExists(updateReqVO.getId());
        validateMemberGrade(updateReqVO.getMemberType(), updateReqVO.getMemberGrade());

        UmsMemberDO updateObj = BeanUtils.toBean(updateReqVO, UmsMemberDO.class);
        memberMapper.updateById(updateObj);

        storageAttachmentApi.updateAttachments("file", MEMBER_RECORD_TYPE,
                updateReqVO.getId(), updateReqVO.getBlobIds());
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteMember(Long id) {
        validateMemberExists(id);
        memberMapper.deleteById(id);
        storageAttachmentApi.deleteAttachmentsByRecord(MEMBER_RECORD_TYPE, id);
    }

    @Override
    public UmsMemberDO getMember(Long id) {
        return memberMapper.selectById(id);
    }

    @Override
    public UmsMemberDO getMemberByUserId(Long userId) {
        return memberMapper.selectByUserId(userId);
    }

    @Override
    public PageResult<UmsMemberDO> getMemberPage(UmsMemberPageReqVO pageReqVO) {
        return memberMapper.selectPage(pageReqVO);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public String archiveMember(Long id) {
        // 1.1 校验会员存在
        UmsMemberDO member = validateMemberExists(id);
        // 1.2 只有「正常」状态的会员才能归档
        if (!MEMBER_STATUS_NORMAL.equals(member.getStatus())) {
            throw exception(MEMBER_ARCHIVE_FAIL_STATUS, member.getNo(), memberStatusName(member.getStatus()));
        }
        // 1.3 重复归档校验
        if (member.getArchiveDocumentId() != null) {
            throw exception(MEMBER_ALREADY_ARCHIVED, member.getNo(),
                    StrUtil.blankToDefault(archiveNo(id), "未知"));
        }

        // 2. 带入会员材料附件，按来源单据归档
        List<Long> blobIds = storageAttachmentApi.listAttachments(MEMBER_RECORD_TYPE, id).stream()
                .map(StorageBlobRespDTO::getId).collect(Collectors.toList());
        Long archiveDocumentId = archiveDocumentApi.archiveBySource(new ArchiveDocumentCreateReqDTO()
                .setSourceType(ARCHIVE_SOURCE_TYPE_MEMBER)
                .setSourceId(id)
                .setSourceNo(member.getNo())
                .setSourceTitle(member.getName())
                .setCategoryCode(ARCHIVE_CATEGORY_CODE_MEMBER)
                .setSecretLevel(ARCHIVE_SECRET_LEVEL_INTERNAL)
                .setSummary("会员材料归档")
                .setBlobIds(blobIds)).getCheckedData();

        // 3. 回写归档档案 ID（作为已归档硬标记）
        memberMapper.updateById(new UmsMemberDO().setId(id).setArchiveDocumentId(archiveDocumentId));
        return StrUtil.blankToDefault(archiveNo(id), "未知");
    }

    // =================== 内部方法 ===================

    private Long createSystemUser(UmsApplicationDO application) {
        // 手机号可作为用户名/密码（参考 HRM 员工模式）
        String mobile = StrUtil.blankToDefault(application.getContactPhone(), "unknown");
        String username = mobile;
        String nickname = application.getApplicantName();

        try {
            return adminUserApi.createUser(new AdminUserCreateReqDTO()
                    .setUsername(username)
                    .setNickname(nickname)
                    .setDeptId(MEMBER_DEPT_ID)
                    .setPostIds(Collections.emptySet())
                    .setMobile(mobile)
                    .setPassword(mobile) // 默认密码为手机号
                    .setEmail(application.getContactEmail())
                    .setRemark("由入会申请自动创建：" + application.getNo()));
        } catch (Exception e) {
            log.error("[createSystemUser] 创建会员系统账号失败，申请单={}", application.getId(), e);
            // 如果手机号重复，给出明确提示
            if (e.getMessage() != null && e.getMessage().contains("手机号")) {
                throw exception(MEMBER_USER_MOBILE_EXISTS);
            }
            throw exception(MEMBER_USER_CREATE_FAIL);
        }
    }

    /**
     * 校验会员等级与类型匹配：单位会员（type=2）不可选个人专有等级「5-理事长」
     */
    private void validateMemberGrade(Integer memberType, String memberGrade) {
        if (memberType == null || StrUtil.isBlank(memberGrade)) {
            return;
        }
        if (memberType == 2 && "5".equals(memberGrade)) {
            throw exception(MEMBER_GRADE_NOT_MATCH_TYPE);
        }
    }

    private UmsMemberDO validateMemberExists(Long id) {
        UmsMemberDO member = memberMapper.selectById(id);
        if (member == null) {
            throw exception(MEMBER_NOT_EXISTS);
        }
        return member;
    }

    /** 会员状态中文名：1-正常 0-暂停（用于归档失败提示） */
    private String memberStatusName(Integer status) {
        if (status == null) {
            return "未知";
        }
        return MEMBER_STATUS_NORMAL.equals(status) ? "正常" : "暂停";
    }

    /** 查询来源单据已生成的档案编号（未归档时返回 null） */
    private String archiveNo(Long memberId) {
        ArchiveDocumentRespDTO archive = archiveDocumentApi
                .getBySource(ARCHIVE_SOURCE_TYPE_MEMBER, memberId).getCheckedData();
        return archive != null ? archive.getNo() : null;
    }

}