backend/internal/dto/dto.go

package dto

import (
	"time"
	"with_you/internal/model"
)

// ==================== User DTOs ====================

// UserResponse 用户公开信息响应（不包含敏感信息）
type UserResponse struct {
	ID             string `json:"id"`
	Username       string `json:"username"`
	Nickname       string `json:"nickname"`
	EmailVerified  bool   `json:"email_verified"`
	Avatar         string `json:"avatar"`
	CoverURL       string `json:"cover_url"`
	Bio            string `json:"bio"`
	Website        string `json:"website"`
	Location       string `json:"location"`
	PostsCount     int    `json:"posts_count"`
	FollowersCount int    `json:"followers_count"`
	FollowingCount int    `json:"following_count"`
	IsFollowing    bool   `json:"is_following"`
	IsFollowingMe  bool   `json:"is_following_me"`
	CreatedAt      string `json:"created_at"`
}

// UserSelfResponse 用户自身信息响应（包含敏感信息，仅本人可见）
type UserSelfResponse struct {
	ID             string  `json:"id"`
	Username       string  `json:"username"`
	Nickname       string  `json:"nickname"`
	Email          *string `json:"email,omitempty"`
	Phone          *string `json:"phone,omitempty"`
	EmailVerified  bool    `json:"email_verified"`
	Avatar         string  `json:"avatar"`
	CoverURL       string  `json:"cover_url"`
	Bio            string  `json:"bio"`
	Website        string  `json:"website"`
	Location       string  `json:"location"`
	PostsCount     int     `json:"posts_count"`
	FollowersCount int     `json:"followers_count"`
	FollowingCount int     `json:"following_count"`
	IsVerified     bool    `json:"is_verified"`
	CreatedAt      string  `json:"created_at"`
	// 隐私设置
	PrivacySettings *PrivacySettingsResponse `json:"privacy_settings,omitempty"`
}

// UserDetailResponse 用户详情响应（仅本人可见，包含敏感信息）
type UserDetailResponse struct {
	ID             string  `json:"id"`
	Username       string  `json:"username"`
	Nickname       string  `json:"nickname"`
	Email          *string `json:"email,omitempty"`
	EmailVerified  bool    `json:"email_verified"`
	Phone          *string `json:"phone,omitempty"`
	Avatar         string  `json:"avatar"`
	CoverURL       string  `json:"cover_url"`
	Bio            string  `json:"bio"`
	Website        string  `json:"website"`
	Location       string  `json:"location"`
	PostsCount     int     `json:"posts_count"`
	FollowersCount int     `json:"followers_count"`
	FollowingCount int     `json:"following_count"`
	IsVerified     bool    `json:"is_verified"`
	IsFollowing    bool    `json:"is_following"`
	IsFollowingMe  bool    `json:"is_following_me"`
	CreatedAt      string  `json:"created_at"`
	// 隐私设置
	PrivacySettings *PrivacySettingsResponse `json:"privacy_settings,omitempty"`
}

// ==================== Admin User DTOs ====================

// AdminUserListResponse 管理端用户列表响应
type AdminUserListResponse struct {
	ID             string  `json:"id"`
	Username       string  `json:"username"`
	Nickname       string  `json:"nickname"`
	Email          *string `json:"email,omitempty"`
	Phone          *string `json:"phone,omitempty"`
	EmailVerified  bool    `json:"email_verified"`
	Avatar         string  `json:"avatar"`
	Status         string  `json:"status"`
	PostsCount     int     `json:"posts_count"`
	FollowersCount int     `json:"followers_count"`
	FollowingCount int     `json:"following_count"`
	LastLoginAt    string  `json:"last_login_at,omitempty"`
	LastLoginIP    string  `json:"last_login_ip,omitempty"`
	CreatedAt      string  `json:"created_at"`
}

// AdminUserDetailResponse 管理端用户详情响应
type AdminUserDetailResponse struct {
	ID             string  `json:"id"`
	Username       string  `json:"username"`
	Nickname       string  `json:"nickname"`
	Email          *string `json:"email"`
	Phone          *string `json:"phone"`
	EmailVerified  bool    `json:"email_verified"`
	Avatar         string  `json:"avatar"`
	CoverURL       string  `json:"cover_url"`
	Bio            string  `json:"bio"`
	Website        string  `json:"website"`
	Location       string  `json:"location"`
	IsVerified     bool    `json:"is_verified"`
	Status         string  `json:"status"`
	PostsCount     int     `json:"posts_count"`
	CommentsCount  int64   `json:"comments_count"`
	FollowersCount int     `json:"followers_count"`
	FollowingCount int     `json:"following_count"`
	LastLoginAt    string  `json:"last_login_at,omitempty"`
	LastLoginIP    string  `json:"last_login_ip,omitempty"`
	CreatedAt      string  `json:"created_at"`
	UpdatedAt      string  `json:"updated_at"`
}

// AdminUpdateUserStatusRequest 更新用户状态请求
type AdminUpdateUserStatusRequest struct {
	Status string `json:"status" binding:"required,oneof=active banned"`
}

// ==================== Post DTOs ====================

// PostChannelBrief 帖子所属频道（列表/详情卡片展示）
type PostChannelBrief struct {
	ID   string `json:"id"`
	Name string `json:"name"`
}

// PostImageResponse 帖子图片响应
type PostImageResponse struct {
	ID              string `json:"id"`
	URL             string `json:"url"`
	ThumbnailURL    string `json:"thumbnail_url"`
	PreviewURL      string `json:"preview_url"`       // 列表/网格预览图
	PreviewURLLarge string `json:"preview_url_large"` // 详情页预览图
	Width           int    `json:"width"`
	Height          int    `json:"height"`
}

// PostResponse 帖子响应（列表用）
type PostResponse struct {
	ID              string                `json:"id"`
	UserID          string                `json:"user_id"`
	ChannelID       *string               `json:"channel_id,omitempty"`
	Title           string                `json:"title"`
	Content         string                `json:"content"`
	Segments        model.MessageSegments `json:"segments,omitempty"`
	Images          []PostImageResponse   `json:"images"`
	Status          string                `json:"status,omitempty"`
	LikesCount      int                   `json:"likes_count"`
	CommentsCount   int                   `json:"comments_count"`
	FavoritesCount  int                   `json:"favorites_count"`
	SharesCount     int                   `json:"shares_count"`
	ViewsCount      int                   `json:"views_count"`
	IsPinned        bool                  `json:"is_pinned"`
	IsLocked        bool                  `json:"is_locked"`
	IsVote          bool                  `json:"is_vote"`
	CreatedAt       string                `json:"created_at"`
	UpdatedAt       string                `json:"updated_at"`
	ContentEditedAt string                `json:"content_edited_at,omitempty"`
	Author          *UserResponse         `json:"author"`
	IsLiked         bool                  `json:"is_liked"`
	IsFavorited     bool                  `json:"is_favorited"`
	Channel         *PostChannelBrief     `json:"channel,omitempty"`
}

// PostDetailResponse 帖子详情响应
type PostDetailResponse struct {
	ID              string                `json:"id"`
	UserID          string                `json:"user_id"`
	ChannelID       *string               `json:"channel_id,omitempty"`
	Title           string                `json:"title"`
	Content         string                `json:"content"`
	Segments        model.MessageSegments `json:"segments,omitempty"`
	Images          []PostImageResponse   `json:"images"`
	Status          string                `json:"status"`
	LikesCount      int                   `json:"likes_count"`
	CommentsCount   int                   `json:"comments_count"`
	FavoritesCount  int                   `json:"favorites_count"`
	SharesCount     int                   `json:"shares_count"`
	ViewsCount      int                   `json:"views_count"`
	IsPinned        bool                  `json:"is_pinned"`
	IsLocked        bool                  `json:"is_locked"`
	IsVote          bool                  `json:"is_vote"`
	CreatedAt       string                `json:"created_at"`
	UpdatedAt       string                `json:"updated_at"`
	ContentEditedAt string                `json:"content_edited_at,omitempty"`
	Author          *UserResponse         `json:"author"`
	IsLiked         bool                  `json:"is_liked"`
	IsFavorited     bool                  `json:"is_favorited"`
	Channel         *PostChannelBrief     `json:"channel,omitempty"`
}

// ==================== Comment DTOs ====================

// CommentImageResponse 评论图片响应
type CommentImageResponse struct {
	URL string `json:"url"`
}

// CommentResponse 评论响应（扁平化结构，类似B站/抖音）
// 第一层级正常展示，第二三四五层级在第一层级的评论区扁平展示
type CommentResponse struct {
	ID           string                 `json:"id"`
	PostID       string                 `json:"post_id"`
	UserID       string                 `json:"user_id"`
	ParentID     *string                `json:"parent_id"`
	RootID       *string                `json:"root_id"`
	Content      string                 `json:"content"`
	Segments     model.MessageSegments  `json:"segments,omitempty"`
	Images       []CommentImageResponse `json:"images"`
	LikesCount   int                    `json:"likes_count"`
	RepliesCount int                    `json:"replies_count"`
	CreatedAt    string                 `json:"created_at"`
	Author       *UserResponse          `json:"author"`
	IsLiked      bool                   `json:"is_liked"`
	TargetID     *string                `json:"target_id,omitempty"` // 被回复的评论ID，前端根据此ID找到被回复用户的昵称
	Replies      []*CommentResponse     `json:"replies,omitempty"`   // 子回复列表（扁平化，所有层级都在这里）
}

// ==================== Notification DTOs ====================

// NotificationResponse 通知响应
type NotificationResponse struct {
	ID        string `json:"id"`
	UserID    string `json:"user_id"`
	Type      string `json:"type"`
	Title     string `json:"title"`
	Content   string `json:"content"`
	Data      string `json:"data"`
	IsRead    bool   `json:"is_read"`
	CreatedAt string `json:"created_at"`
}

// ==================== Message Segment DTOs ====================

// SegmentType Segment类型
type SegmentType string

const (
	SegmentTypeText  SegmentType = "text"
	SegmentTypeImage SegmentType = "image"
	SegmentTypeVoice SegmentType = "voice"
	SegmentTypeVideo SegmentType = "video"
	SegmentTypeFile  SegmentType = "file"
	SegmentTypeAt    SegmentType = "at"
	SegmentTypeReply SegmentType = "reply"
	SegmentTypeFace  SegmentType = "face"
	SegmentTypeLink   SegmentType = "link"
	SegmentTypeVote   SegmentType = "vote"
	SegmentTypePostRef SegmentType = "post_ref"
)

// TextSegmentData 文本数据
type TextSegmentData struct {
	Text string `json:"text"`
}

// ImageSegmentData 图片数据
type ImageSegmentData struct {
	URL          string `json:"url"`
	Width        int    `json:"width,omitzero"`
	Height       int    `json:"height,omitzero"`
	ThumbnailURL string `json:"thumbnail_url,omitempty"`
	FileSize     int64  `json:"file_size,omitzero"`
}

// VoiceSegmentData 语音数据
type VoiceSegmentData struct {
	URL      string `json:"url"`
	Duration int    `json:"duration,omitzero"` // 秒
	FileSize int64  `json:"file_size,omitzero"`
}

// VideoSegmentData 视频数据
type VideoSegmentData struct {
	URL          string `json:"url"`
	Width        int    `json:"width,omitzero"`
	Height       int    `json:"height,omitzero"`
	Duration     int    `json:"duration,omitzero"` // 秒
	ThumbnailURL string `json:"thumbnail_url,omitempty"`
	FileSize     int64  `json:"file_size,omitzero"`
}

// FileSegmentData 文件数据
type FileSegmentData struct {
	URL      string `json:"url"`
	Name     string `json:"name"`
	Size     int64  `json:"size,omitzero"`
	MimeType string `json:"mime_type,omitempty"`
}

// AtSegmentData @数据
type AtSegmentData struct {
	UserID   string `json:"user_id"` // "all" 表示@所有人
	Nickname string `json:"nickname,omitempty"`
}

// ReplySegmentData 回复数据
type ReplySegmentData struct {
	ID string `json:"id"` // 被回复消息的ID
}

// FaceSegmentData 表情数据
type FaceSegmentData struct {
	ID   int    `json:"id,omitzero"`
	Name string `json:"name,omitempty"`
	URL  string `json:"url,omitempty"`
}

// LinkSegmentData 链接数据
type LinkSegmentData struct {
	URL         string `json:"url"`
	Title       string `json:"title,omitempty"`
	Description string `json:"description,omitempty"`
	Image       string `json:"image,omitempty"`
}

// VoteOptionData 投票选项数据
type VoteOptionData struct {
	ID      string `json:"id"`
	Content string `json:"content"`
}

// PostRefSegmentData 帖子内链Segment数据
type PostRefSegmentData struct {
	PostID     string        `json:"post_id"`
	Title      string        `json:"title,omitempty"`
	Author     *UserResponse `json:"author,omitempty"`
	Status     string        `json:"status,omitempty"`
	Accessible bool          `json:"accessible"`
	ClickCount int           `json:"click_count,omitzero"`
}

// PostRefBrief 帖子内链简要信息 (用于搜索联想)
type PostRefBrief struct {
	ID      string `json:"id"`
	Title   string `json:"title"`
	Channel string `json:"channel,omitempty"`
}

// VoteSegmentData 投票Segment数据
type VoteSegmentData struct {
	Options       []VoteOptionData `json:"options"`
	MaxChoices    int              `json:"max_choices,omitempty"`
	IsMultiChoice bool             `json:"is_multi_choice,omitempty"`
}

// ==================== Message DTOs ====================

// MessageResponse 消息响应
type MessageResponse struct {
	ID             string                `json:"id"`
	ConversationID string                `json:"conversation_id"`
	SenderID       string                `json:"sender_id"`
	Seq            int64                 `json:"seq"`
	Segments       model.MessageSegments `json:"segments"`              // 消息链（必须）
	ReplyToID      *string               `json:"reply_to_id,omitempty"` // 被回复消息的ID（用于关联查找）
	Status         string                `json:"status"`
	Category       string                `json:"category,omitempty"` // 消息类别：chat, notification, announcement
	CreatedAt      string                `json:"created_at"`
	Sender         *UserResponse         `json:"sender"`
}

// ConversationResponse 会话响应
type ConversationResponse struct {
	ID                string           `json:"id"`
	Type              string           `json:"type"`
	IsPinned          bool             `json:"is_pinned"`
	NotificationMuted bool             `json:"notification_muted"`
	Group             *GroupResponse   `json:"group,omitempty"`
	LastSeq           int64            `json:"last_seq"`
	LastMessage       *MessageResponse `json:"last_message"`
	LastMessageAt     string           `json:"last_message_at"`
	UnreadCount       int              `json:"unread_count"`
	Participants      []*UserResponse  `json:"participants,omitempty"` // 私聊时使用
	MemberCount       int              `json:"member_count,omitempty"` // 群聊时使用
	CreatedAt         string           `json:"created_at"`
	UpdatedAt         string           `json:"updated_at"`
}

// ConversationParticipantResponse 会话参与者响应
type ConversationParticipantResponse struct {
	UserID            string `json:"user_id"`
	LastReadSeq       int64  `json:"last_read_seq"`
	NotificationMuted bool   `json:"notification_muted"`
	IsPinned          bool   `json:"is_pinned"`
}

// ==================== Auth DTOs ====================

// LoginResponse 登录响应
type LoginResponse struct {
	User         *UserResponse `json:"user"`
	AccessToken  string        `json:"access_token"`
	RefreshToken string        `json:"refresh_token"`
}

// RegisterResponse 注册响应
type RegisterResponse struct {
	User         *UserResponse `json:"user"`
	AccessToken  string        `json:"access_token"`
	RefreshToken string        `json:"refresh_token"`
}

// RefreshTokenResponse 刷新Token响应
type RefreshTokenResponse struct {
	AccessToken  string `json:"access_token"`
	RefreshToken string `json:"refresh_token"`
}

// ==================== Common DTOs ====================

// SuccessResponse 通用成功响应
type SuccessResponse struct {
	Success bool   `json:"success"`
	Message string `json:"message"`
}

// AvailableResponse 可用性检查响应
type AvailableResponse struct {
	Available bool `json:"available"`
}

// CountResponse 数量响应
type CountResponse struct {
	Count int `json:"count"`
}

// URLResponse URL响应
type URLResponse struct {
	URL string `json:"url"`
}

// ==================== Chat Request DTOs ====================

// CreateConversationRequest 创建会话请求
type CreateConversationRequest struct {
	UserID string `json:"user_id" binding:"required"` // 目标用户ID (UUID格式)
}

// SendMessageRequest 发送消息请求
type SendMessageRequest struct {
	Segments  model.MessageSegments `json:"segments" binding:"required"` // 消息链（必须）
	ReplyToID *string               `json:"reply_to_id,omitempty"`       // 回复的消息ID (string类型)
}

// MarkReadRequest 标记已读请求
type MarkReadRequest struct {
	LastReadSeq int64 `json:"last_read_seq" binding:"required"` // 已读到的seq位置
}

// SetConversationPinnedRequest 设置会话置顶请求
type SetConversationPinnedRequest struct {
	ConversationID string `json:"conversation_id" binding:"required"`
	IsPinned       bool   `json:"is_pinned"`
}

// ==================== Chat Response DTOs ====================

// ConversationListResponse 会话列表响应
type ConversationListResponse struct {
	Conversations []*ConversationResponse `json:"list"`
	Total         int64                   `json:"total"`
	Page          int                     `json:"page"`
	PageSize      int                     `json:"page_size"`
}

// ConversationDetailResponse 会话详情响应
type ConversationDetailResponse struct {
	ID                string           `json:"id"`
	Type              string           `json:"type"`
	IsPinned          bool             `json:"is_pinned"`
	NotificationMuted bool             `json:"notification_muted"`
	LastSeq           int64            `json:"last_seq"`
	LastMessage       *MessageResponse `json:"last_message"`
	LastMessageAt     string           `json:"last_message_at"`
	UnreadCount       int64            `json:"unread_count"`
	Participants      []*UserResponse  `json:"participants"`
	MyLastReadSeq     int64            `json:"my_last_read_seq"`    // 当前用户的已读位置
	OtherLastReadSeq  int64            `json:"other_last_read_seq"` // 对方用户的已读位置
	CreatedAt         string           `json:"created_at"`
	UpdatedAt         string           `json:"updated_at"`
}

// UnreadCountResponse 未读数响应
type UnreadCountResponse struct {
	TotalUnreadCount int64 `json:"total_unread_count"` // 所有会话的未读总数
}

// ConversationUnreadCountResponse 单个会话未读数响应
type ConversationUnreadCountResponse struct {
	ConversationID string `json:"conversation_id"`
	UnreadCount    int64  `json:"unread_count"`
}

// MessageListResponse 消息列表响应
type MessageListResponse struct {
	Messages []*MessageResponse `json:"messages"`
	Total    int64              `json:"total"`
	Page     int                `json:"page"`
	PageSize int                `json:"page_size"`
}

// MessageSyncResponse 消息同步响应（增量同步）
type MessageSyncResponse struct {
	Messages []*MessageResponse `json:"messages"`
	HasMore  bool               `json:"has_more"`
}

// ==================== 设备Token DTOs ====================

// RegisterDeviceRequest 注册设备请求
type RegisterDeviceRequest struct {
	DeviceID   string `json:"device_id" binding:"required"`
	DeviceType string `json:"device_type" binding:"required,oneof=ios android web"`
	PushToken  string `json:"push_token"`
	DeviceName string `json:"device_name"`
}

// DeviceTokenResponse 设备Token响应
type DeviceTokenResponse struct {
	ID         int64     `json:"id"`
	DeviceID   string    `json:"device_id"`
	DeviceType string    `json:"device_type"`
	IsActive   bool      `json:"is_active"`
	DeviceName string    `json:"device_name"`
	LastUsedAt time.Time `json:"last_used_at,omitzero"`
	CreatedAt  time.Time `json:"created_at"`
}

// ==================== 推送记录 DTOs ====================

// PushRecordResponse 推送记录响应
type PushRecordResponse struct {
	ID          int64     `json:"id"`
	MessageID   string    `json:"message_id"`
	PushChannel string    `json:"push_channel"`
	PushStatus  string    `json:"push_status"`
	RetryCount  int       `json:"retry_count,omitzero"`
	PushedAt    time.Time `json:"pushed_at,omitzero"`
	DeliveredAt time.Time `json:"delivered_at,omitzero"`
	CreatedAt   time.Time `json:"created_at"`
}

// PushRecordListResponse 推送记录列表响应
type PushRecordListResponse struct {
	Records []*PushRecordResponse `json:"records"`
	Total   int64                 `json:"total"`
}

// ==================== 系统消息 DTOs ====================

// SystemMessageResponse 系统消息响应
type SystemMessageResponse struct {
	ID         string         `json:"id"`
	SenderID   string         `json:"sender_id"`
	ReceiverID string         `json:"receiver_id"`
	Content    string         `json:"content"`
	Category   string         `json:"category"`
	SystemType string         `json:"system_type"`
	ExtraData  map[string]any `json:"extra_data,omitempty"`
	IsRead     bool           `json:"is_read"`
	CreatedAt  time.Time      `json:"created_at"`
}

// SystemMessageListResponse 系统消息列表响应
type SystemMessageListResponse struct {
	Messages []*SystemMessageResponse `json:"messages"`
	Total    int64                    `json:"total"`
	Page     int                      `json:"page"`
	PageSize int                      `json:"page_size"`
}

// SystemUnreadCountResponse 系统消息未读数响应
type SystemUnreadCountResponse struct {
	UnreadCount int64 `json:"unread_count"`
}

// SystemMessageCursorPageResponse 系统消息游标分页响应
type SystemMessageCursorPageResponse struct {
	Items      []*SystemMessageResponse `json:"list"`
	NextCursor string                   `json:"next_cursor"`
	PrevCursor string                   `json:"prev_cursor"`
	HasMore    bool                     `json:"has_more"`
}

// ==================== 时间格式化 ====================

// FormatTime 格式化时间
func FormatTime(t time.Time) string {
	if t.IsZero() {
		return ""
	}
	return t.Format("2006-01-02T15:04:05Z07:00")
}

// FormatTimePointer 格式化时间指针
func FormatTimePointer(t *time.Time) string {
	if t == nil {
		return ""
	}
	return FormatTime(*t)
}

// ==================== Group DTOs ====================

// CreateGroupRequest 创建群组请求
type CreateGroupRequest struct {
	Name        string   `json:"name" binding:"required,max=50"`
	Description string   `json:"description" binding:"max=500"`
	MemberIDs   []string `json:"member_ids"`
}

// UpdateGroupRequest 更新群组请求
type UpdateGroupRequest struct {
	Name        string `json:"name" binding:"omitempty,max=50"`
	Description string `json:"description" binding:"omitempty,max=500"`
	Avatar      string `json:"avatar" binding:"omitempty,url"`
}

// InviteMembersRequest 邀请成员请求
type InviteMembersRequest struct {
	MemberIDs []string `json:"member_ids" binding:"required,min=1"`
}

// TransferOwnerRequest 转让群主请求
type TransferOwnerRequest struct {
	NewOwnerID string `json:"new_owner_id" binding:"required"`
}

// SetRoleRequest 设置角色请求
type SetRoleRequest struct {
	Role string `json:"role" binding:"required,oneof=admin member"`
}

// SetNicknameRequest 设置昵称请求
type SetNicknameRequest struct {
	Nickname string `json:"nickname" binding:"max=50"`
}

// MuteMemberRequest 禁言成员请求
type MuteMemberRequest struct {
	Muted bool `json:"muted"`
}

// SetMuteAllRequest 设置全员禁言请求
type SetMuteAllRequest struct {
	MuteAll bool `json:"mute_all"`
}

// SetJoinTypeRequest 设置加群方式请求
type SetJoinTypeRequest struct {
	JoinType int `json:"join_type" binding:"min=0,max=2"`
}

// CreateAnnouncementRequest 创建群公告请求
type CreateAnnouncementRequest struct {
	Content string `json:"content" binding:"required,max=2000"`
}

// GroupResponse 群组响应
type GroupResponse struct {
	ID          string `json:"id"`
	Name        string `json:"name"`
	Avatar      string `json:"avatar"`
	Description string `json:"description"`
	OwnerID     string `json:"owner_id"`
	MemberCount int    `json:"member_count"`
	MaxMembers  int    `json:"max_members"`
	JoinType    int    `json:"join_type"`
	MuteAll     bool   `json:"mute_all"`
	CreatedAt   string `json:"created_at"`
}

// GroupMemberResponse 群成员响应
type GroupMemberResponse struct {
	ID       string        `json:"id"`
	GroupID  string        `json:"group_id"`
	UserID   string        `json:"user_id"`
	Role     string        `json:"role"`
	Nickname string        `json:"nickname"`
	Muted    bool          `json:"muted"`
	JoinTime string        `json:"join_time"`
	User     *UserResponse `json:"user,omitempty"`
}

// GroupAnnouncementResponse 群公告响应
type GroupAnnouncementResponse struct {
	ID        string `json:"id"`
	GroupID   string `json:"group_id"`
	Content   string `json:"content"`
	AuthorID  string `json:"author_id"`
	IsPinned  bool   `json:"is_pinned"`
	CreatedAt string `json:"created_at"`
}

// GroupListResponse 群组列表响应
type GroupListResponse struct {
	List     []*GroupResponse `json:"list"`
	Total    int64            `json:"total"`
	Page     int              `json:"page"`
	PageSize int              `json:"page_size"`
}

// GroupMemberListResponse 群成员列表响应
type GroupMemberListResponse struct {
	List     []*GroupMemberResponse `json:"list"`
	Total    int64                  `json:"total"`
	Page     int                    `json:"page"`
	PageSize int                    `json:"page_size"`
}

// GroupAnnouncementListResponse 群公告列表响应
type GroupAnnouncementListResponse struct {
	List     []*GroupAnnouncementResponse `json:"list"`
	Total    int64                        `json:"total"`
	Page     int                          `json:"page"`
	PageSize int                          `json:"page_size"`
}

// ==================== WebSocket Event DTOs ====================

// WSEventResponse WebSocket事件响应结构体
// 用于后端推送消息给前端的标准格式
type WSEventResponse struct {
	ID             string                `json:"id"`              // 事件唯一ID (UUID)
	Time           int64                 `json:"time"`            // 时间戳 (毫秒)
	Type           string                `json:"type"`            // 事件类型 (message, notification, system等)
	DetailType     string                `json:"detail_type"`     // 详细类型 (private, group, like, comment等)
	ConversationID string                `json:"conversation_id"` // 会话ID
	Seq            string                `json:"seq"`             // 消息序列号
	Segments       model.MessageSegments `json:"segments"`        // 消息段数组
	SenderID       string                `json:"sender_id"`       // 发送者用户ID
}

// ==================== WebSocket Request DTOs ====================

// SendMessageParams 发送消息参数（用于 REST API）
type SendMessageParams struct {
	DetailType     string                `json:"detail_type"`           // 消息类型: private, group
	ConversationID string                `json:"conversation_id"`       // 会话ID
	Segments       model.MessageSegments `json:"segments"`              // 消息内容（消息段数组）
	ReplyToID      *string               `json:"reply_to_id,omitempty"` // 回复的消息ID
}

// DeleteMsgParams 撤回消息参数
type DeleteMsgParams struct {
	MessageID string `json:"message_id"` // 消息ID
}

// ==================== Group Action Params ====================

// SetGroupKickParams 群组踢人参数
type SetGroupKickParams struct {
	GroupID          string `json:"group_id"`           // 群组ID
	UserID           string `json:"user_id"`            // 被踢用户ID
	RejectAddRequest bool   `json:"reject_add_request"` // 是否拒绝再次加群
}

// SetGroupBanParams 群组单人禁言参数
type SetGroupBanParams struct {
	GroupID  string `json:"group_id"` // 群组ID
	UserID   string `json:"user_id"`  // 被禁言用户ID
	Duration int64  `json:"duration"` // 禁言时长（秒），0表示解除禁言
}

// SetGroupWholeBanParams 群组全员禁言参数
type SetGroupWholeBanParams struct {
	GroupID string `json:"group_id"` // 群组ID
	Enable  bool   `json:"enable"`   // 是否开启全员禁言
}

// SetGroupAdminParams 群组设置管理员参数
type SetGroupAdminParams struct {
	GroupID string `json:"group_id"` // 群组ID
	UserID  string `json:"user_id"`  // 被设置的用户ID
	Enable  bool   `json:"enable"`   // 是否设置为管理员
}

// SetGroupNameParams 设置群名参数
type SetGroupNameParams struct {
	GroupID   string `json:"group_id"`   // 群组ID
	GroupName string `json:"group_name"` // 新群名
}

// SetGroupAvatarParams 设置群头像参数
type SetGroupAvatarParams struct {
	GroupID string `json:"group_id"` // 群组ID
	Avatar  string `json:"avatar"`   // 头像URL
}

// SetGroupLeaveParams 退出群组参数
type SetGroupLeaveParams struct {
	GroupID string `json:"group_id"` // 群组ID
}

// SetGroupAddRequestParams 处理加群请求参数
type SetGroupAddRequestParams struct {
	Flag    string `json:"flag"`    // 加群请求的flag标识
	Approve bool   `json:"approve"` // 是否同意
	Reason  string `json:"reason"`  // 拒绝理由（当approve为false时）
}

// GetConversationListParams 获取会话列表参数
type GetConversationListParams struct {
	Page     int `json:"page"`      // 页码
	PageSize int `json:"page_size"` // 每页数量
}

// GetGroupInfoParams 获取群信息参数
type GetGroupInfoParams struct {
	GroupID string `json:"group_id"` // 群组ID
}

// GetGroupMemberListParams 获取群成员列表参数
type GetGroupMemberListParams struct {
	GroupID  string `json:"group_id"`  // 群组ID
	Page     int    `json:"page"`      // 页码
	PageSize int    `json:"page_size"` // 每页数量
}

// ==================== Conversation Action Params ====================

// CreateConversationParams 创建会话参数
type CreateConversationParams struct {
	UserID string `json:"user_id"` // 目标用户ID（私聊）
}

// MarkReadParams 标记已读参数
type MarkReadParams struct {
	ConversationID string `json:"conversation_id"` // 会话ID
	LastReadSeq    int64  `json:"last_read_seq"`   // 最后已读消息序号
}

// SetConversationPinnedParams 设置会话置顶参数
type SetConversationPinnedParams struct {
	ConversationID string `json:"conversation_id"` // 会话ID
	IsPinned       bool   `json:"is_pinned"`       // 是否置顶
}

// ==================== Group Action Params (Additional) ====================

// CreateGroupParams 创建群组参数
type CreateGroupParams struct {
	Name        string   `json:"name"`                  // 群名
	Description string   `json:"description,omitempty"` // 群描述
	MemberIDs   []string `json:"member_ids,omitempty"`  // 初始成员ID列表
}

// GetUserGroupsParams 获取用户群组列表参数
type GetUserGroupsParams struct {
	Page     int `json:"page"`      // 页码
	PageSize int `json:"page_size"` // 每页数量
}

// TransferOwnerParams 转让群主参数
type TransferOwnerParams struct {
	GroupID    string `json:"group_id"`     // 群组ID
	NewOwnerID string `json:"new_owner_id"` // 新群主ID
}

// InviteMembersParams 邀请成员参数
type InviteMembersParams struct {
	GroupID   string   `json:"group_id"`   // 群组ID
	MemberIDs []string `json:"member_ids"` // 被邀请的用户ID列表
}

// JoinGroupParams 加入群组参数
type JoinGroupParams struct {
	GroupID string `json:"group_id"` // 群组ID
}

// SetNicknameParams 设置群内昵称参数
type SetNicknameParams struct {
	GroupID  string `json:"group_id"` // 群组ID
	Nickname string `json:"nickname"` // 群内昵称
}

// SetJoinTypeParams 设置加群方式参数
type SetJoinTypeParams struct {
	GroupID  string `json:"group_id"`  // 群组ID
	JoinType int    `json:"join_type"` // 加群方式：0-允许任何人加入，1-需要审批，2-不允许加入
}

// CreateAnnouncementParams 创建群公告参数
type CreateAnnouncementParams struct {
	GroupID string `json:"group_id"` // 群组ID
	Content string `json:"content"`  // 公告内容
}

// GetAnnouncementsParams 获取群公告列表参数
type GetAnnouncementsParams struct {
	GroupID  string `json:"group_id"`  // 群组ID
	Page     int    `json:"page"`      // 页码
	PageSize int    `json:"page_size"` // 每页数量
}

// DeleteAnnouncementParams 删除群公告参数
type DeleteAnnouncementParams struct {
	GroupID        string `json:"group_id"`        // 群组ID
	AnnouncementID string `json:"announcement_id"` // 公告ID
}

// DissolveGroupParams 解散群组参数
type DissolveGroupParams struct {
	GroupID string `json:"group_id"` // 群组ID
}

// GetMyMemberInfoParams 获取我在群组中的成员信息参数
type GetMyMemberInfoParams struct {
	GroupID string `json:"group_id"` // 群组ID
}

// ==================== Vote DTOs ====================

// CreateVotePostRequest 创建投票帖子请求
type CreateVotePostRequest struct {
	Title       string   `json:"title" binding:"required,max=200"`
	Content     string   `json:"content" binding:"max=2000"`
	ChannelID   *string  `json:"channel_id,omitempty"`
	Images      []string `json:"images"`
	VoteOptions []string `json:"vote_options" binding:"required,min=2,max=10"`
}

// CreatePostWithSegmentsRequest 创建帖子请求（含 segments）
type CreatePostWithSegmentsRequest struct {
	Title     string                `json:"title" binding:"required,max=200"`
	Content   string                `json:"content"`
	Segments  model.MessageSegments `json:"segments"`
	Images    []string              `json:"images"`
	ChannelID *string               `json:"channel_id,omitempty"`
}

// VoteOptionDTO 投票选项DTO
type VoteOptionDTO struct {
	ID         string `json:"id"`
	Content    string `json:"content"`
	VotesCount int    `json:"votes_count"`
}

// VoteResultDTO 投票结果DTO
type VoteResultDTO struct {
	Options       []VoteOptionDTO `json:"options"`
	TotalVotes    int             `json:"total_votes"`
	HasVoted      bool            `json:"has_voted"`
	VotedOptionID string          `json:"voted_option_id,omitzero"`
}

// ==================== WebSocket Response DTOs ====================

// WSResponse WebSocket响应结构体
type WSResponse struct {
	Success bool   `json:"success"`         // 是否成功
	Action  string `json:"action"`          // 响应原action
	Data    any    `json:"data,omitempty"`  // 响应数据
	Error   string `json:"error,omitempty"` // 错误信息
}

// ==================== Admin Post DTOs ====================

// AdminPostListResponse 管理端帖子列表响应
type AdminPostListResponse struct {
	ID              string              `json:"id"`
	UserID          string              `json:"user_id"`
	Title           string              `json:"title"`
	Content         string              `json:"content"`
	Images          []PostImageResponse `json:"images"`
	Status          string              `json:"status"`
	LikesCount      int                 `json:"likes_count,omitzero"`
	CommentsCount   int                 `json:"comments_count,omitzero"`
	FavoritesCount  int                 `json:"favorites_count,omitzero"`
	ViewsCount      int                 `json:"views_count,omitzero"`
	IsPinned        bool                `json:"is_pinned"`
	IsFeatured      bool                `json:"is_featured"`
	IsLocked        bool                `json:"is_locked"`
	RejectReason    string              `json:"reject_reason,omitempty"`
	ReviewedAt      string              `json:"reviewed_at,omitempty"`
	ReviewedBy      string              `json:"reviewed_by,omitempty"`
	CreatedAt       string              `json:"created_at"`
	UpdatedAt       string              `json:"updated_at"`
	ContentEditedAt string              `json:"content_edited_at,omitempty"`
	Author          *UserResponse       `json:"author"`
}

// AdminPostDetailResponse 管理端帖子详情响应
type AdminPostDetailResponse struct {
	ID              string                `json:"id"`
	UserID          string                `json:"user_id"`
	ChannelID       *string               `json:"channel_id,omitempty"`
	Title           string                `json:"title"`
	Content         string                `json:"content"`
	Segments        model.MessageSegments `json:"segments,omitempty"`
	Images          []PostImageResponse   `json:"images"`
	Status          string                `json:"status"`
	LikesCount      int                   `json:"likes_count,omitzero"`
	CommentsCount   int                   `json:"comments_count,omitzero"`
	FavoritesCount  int                   `json:"favorites_count,omitzero"`
	SharesCount     int                   `json:"shares_count,omitzero"`
	ViewsCount      int                   `json:"views_count,omitzero"`
	IsPinned        bool                  `json:"is_pinned"`
	IsFeatured      bool                  `json:"is_featured"`
	IsLocked        bool                  `json:"is_locked"`
	IsVote          bool                  `json:"is_vote"`
	RejectReason    string                `json:"reject_reason,omitempty"`
	ReviewedAt      string                `json:"reviewed_at,omitempty"`
	ReviewedBy      string                `json:"reviewed_by,omitempty"`
	CreatedAt       string                `json:"created_at"`
	UpdatedAt       string                `json:"updated_at"`
	ContentEditedAt string                `json:"content_edited_at,omitempty"`
	Author          *UserResponse         `json:"author"`
}

// AdminModeratePostRequest 审核帖子请求
type AdminModeratePostRequest struct {
	Status string `json:"status" binding:"required,oneof=published rejected"`
	Reason string `json:"reason"` // 拒绝理由（当status为rejected时）
}

// AdminBatchDeletePostsRequest 批量删除帖子请求
type AdminBatchDeletePostsRequest struct {
	IDs []string `json:"ids" binding:"required,min=1,max=100,dive,required"`
}

// AdminBatchModeratePostsRequest 批量审核帖子请求
type AdminBatchModeratePostsRequest struct {
	IDs    []string `json:"ids" binding:"required,min=1,max=100,dive,required"`
	Status string   `json:"status" binding:"required,oneof=published rejected"`
}

// AdminSetPostPinRequest 置顶帖子请求
type AdminSetPostPinRequest struct {
	IsPinned bool `json:"is_pinned"`
}

// AdminSetPostFeatureRequest 加精帖子请求
type AdminSetPostFeatureRequest struct {
	IsFeatured bool `json:"is_featured"`
}

// AdminBatchOperationResponse 批量操作响应
type AdminBatchOperationResponse struct {
	Success bool     `json:"success"`
	Message string   `json:"message"`
	Failed  []string `json:"failed,omitempty"` // 失败的ID列表
}

// ==================== Admin Comment DTOs ====================

// AdminCommentListResponse 管理端评论列表响应
type AdminCommentListResponse struct {
	ID           string                 `json:"id"`
	PostID       string                 `json:"post_id"`
	UserID       string                 `json:"user_id"`
	ParentID     *string                `json:"parent_id"`
	RootID       *string                `json:"root_id"`
	Content      string                 `json:"content"`
	Images       []CommentImageResponse `json:"images"`
	Status       string                 `json:"status"`
	RejectReason string                 `json:"reject_reason,omitempty"`
	ReviewedAt   string                 `json:"reviewed_at,omitempty"`
	ReviewedBy   string                 `json:"reviewed_by,omitempty"`
	LikesCount   int                    `json:"likes_count"`
	RepliesCount int                    `json:"replies_count"`
	CreatedAt    string                 `json:"created_at"`
	UpdatedAt    string                 `json:"updated_at"`
	Author       *UserResponse          `json:"author"`
	Post         *AdminCommentPostInfo  `json:"post"`
}

// AdminCommentPostInfo 评论关联的帖子简要信息
type AdminCommentPostInfo struct {
	ID    string `json:"id"`
	Title string `json:"title"`
}

// AdminCommentDetailResponse 管理端评论详情响应
type AdminCommentDetailResponse struct {
	ID           string                 `json:"id"`
	PostID       string                 `json:"post_id"`
	UserID       string                 `json:"user_id"`
	ParentID     *string                `json:"parent_id"`
	RootID       *string                `json:"root_id"`
	Content      string                 `json:"content"`
	Images       []CommentImageResponse `json:"images"`
	Status       string                 `json:"status"`
	RejectReason string                 `json:"reject_reason,omitempty"`
	ReviewedAt   string                 `json:"reviewed_at,omitempty"`
	ReviewedBy   string                 `json:"reviewed_by,omitempty"`
	LikesCount   int                    `json:"likes_count"`
	RepliesCount int                    `json:"replies_count"`
	CreatedAt    string                 `json:"created_at"`
	UpdatedAt    string                 `json:"updated_at"`
	Author       *UserResponse          `json:"author"`
	Post         *AdminCommentPostInfo  `json:"post"`
	ReplyToUser  *UserResponse          `json:"reply_to_user,omitempty"`
}

// AdminBatchDeleteCommentsRequest 批量删除评论请求
type AdminBatchDeleteCommentsRequest struct {
	IDs []string `json:"ids" binding:"required,min=1,max=100,dive,required"`
}

// AdminModerateCommentRequest 审核评论请求
type AdminModerateCommentRequest struct {
	Status string `json:"status" binding:"required,oneof=published rejected"`
	Reason string `json:"reason"`
}

// AdminBatchModerateCommentsRequest 批量审核评论请求
type AdminBatchModerateCommentsRequest struct {
	IDs    []string `json:"ids" binding:"required,min=1,max=100,dive,required"`
	Status string   `json:"status" binding:"required,oneof=published rejected"`
}

// ==================== Admin Group DTOs ====================

// AdminGroupListResponse 管理端群组列表响应
type AdminGroupListResponse struct {
	ID          string        `json:"id"`
	Name        string        `json:"name"`
	Avatar      string        `json:"avatar"`
	Description string        `json:"description"`
	OwnerID     string        `json:"owner_id"`
	Owner       *UserResponse `json:"owner"`
	MemberCount int           `json:"member_count"`
	MaxMembers  int           `json:"max_members"`
	JoinType    int           `json:"join_type"`
	MuteAll     bool          `json:"mute_all"`
	Status      string        `json:"status"`
	PostCount   int64         `json:"post_count"`
	CreatedAt   string        `json:"created_at"`
	UpdatedAt   string        `json:"updated_at"`
}

// AdminGroupDetailResponse 管理端群组详情响应
type AdminGroupDetailResponse struct {
	ID           string                     `json:"id"`
	Name         string                     `json:"name"`
	Avatar       string                     `json:"avatar"`
	Description  string                     `json:"description"`
	OwnerID      string                     `json:"owner_id"`
	Owner        *UserResponse              `json:"owner"`
	MemberCount  int                        `json:"member_count"`
	MaxMembers   int                        `json:"max_members"`
	JoinType     int                        `json:"join_type"`
	MuteAll      bool                       `json:"mute_all"`
	Status       string                     `json:"status"`
	PostCount    int64                      `json:"post_count"`
	Announcement *GroupAnnouncementResponse `json:"announcement,omitempty"`
	IsPublic     bool                       `json:"is_public"`
	CreatedAt    string                     `json:"created_at"`
	UpdatedAt    string                     `json:"updated_at"`
}

// AdminGroupMemberResponse 管理端群组成员响应
type AdminGroupMemberResponse struct {
	ID       string        `json:"id"`
	UserID   string        `json:"user_id"`
	Username string        `json:"username"`
	Nickname string        `json:"nickname"`
	Avatar   string        `json:"avatar"`
	Role     string        `json:"role"`
	Muted    bool          `json:"muted"`
	JoinedAt string        `json:"joined_at"`
	User     *UserResponse `json:"user,omitempty"`
}

// AdminGroupMemberListResponse 管理端群组成员列表响应
type AdminGroupMemberListResponse struct {
	List     []*AdminGroupMemberResponse `json:"list"`
	Total    int64                       `json:"total"`
	Page     int                         `json:"page"`
	PageSize int                         `json:"page_size"`
}

// AdminUpdateGroupStatusRequest 更新群组状态请求
type AdminUpdateGroupStatusRequest struct {
	Status string `json:"status" binding:"required,oneof=active dissolved"`
}

// AdminTransferGroupOwnerRequest 转让群主请求
type AdminTransferGroupOwnerRequest struct {
	NewOwnerID string `json:"new_owner_id" binding:"required"`
}

// ==================== Admin Dashboard DTOs ====================

// DashboardStatsResponse 仪表盘统计数据响应
type DashboardStatsResponse struct {
	TotalUsers        int64 `json:"total_users"`            // 总用户数
	TodayNewUsers     int64 `json:"today_new_users"`        // 今日新增用户
	ActiveUsersToday  int64 `json:"active_users_today"`     // 今日活跃用户 (DAU)
	ActiveUsersWeek   int64 `json:"active_users_week"`      // 本周活跃用户 (WAU)
	ActiveUsersMonth  int64 `json:"active_users_month"`     // 本月活跃用户 (MAU)
	Retention1Day     int64 `json:"retention_1_day"`        // 次日留存率 (百分比 0-100)
	Retention7Day     int64 `json:"retention_7_day"`        // 7日留存率 (百分比 0-100)
	Retention30Day    int64 `json:"retention_30_day"`       // 30日留存率 (百分比 0-100)
	TotalPosts        int64 `json:"total_posts"`            // 总帖子数
	TodayPosts        int64 `json:"today_posts"`            // 今日帖子数
	PendingPosts      int64 `json:"pending_posts"`          // 待审核帖子数
	TotalComments     int64 `json:"total_comments"`         // 总评论数
	TodayComments     int64 `json:"today_comments"`         // 今日评论数
	TotalGroups       int64 `json:"total_groups"`           // 总群组数
	TodayNewGroups    int64 `json:"today_new_groups"`       // 今日新建群组
	PendingReview     int64 `json:"pending_review"`         // 待审核总数
	PendingPostsCount int64 `json:"pending_posts_count"`    // 待审核帖子数
	PendingComments   int64 `json:"pending_comments_count"` // 待审核评论数
	PendingAvatars    int64 `json:"pending_avatars"`        // 待审核头像数
	PendingCovers     int64 `json:"pending_covers"`         // 待审核背景图数
	PendingBios       int64 `json:"pending_bios"`           // 待审核签名数
}

// UserActivityTrendResponse 用户活跃度趋势响应
type UserActivityTrendResponse struct {
	Date        string `json:"date"`         // 日期
	NewUsers    int64  `json:"new_users"`    // 新增用户数
	ActiveUsers int64  `json:"active_users"` // 活跃用户数
	Posts       int64  `json:"posts"`        // 帖子数
	Comments    int64  `json:"comments"`     // 评论数
}

// ContentStatsResponse 内容统计响应
type ContentStatsResponse struct {
	ContentDistribution    []ContentDistributionItem    `json:"content_distribution"`     // 内容分布
	PostStatusDistribution []PostStatusDistributionItem `json:"post_status_distribution"` // 帖子状态分布
	UserGrowth             []UserGrowthItem             `json:"user_growth"`              // 用户增长趋势
}

// ContentDistributionItem 内容分布项
type ContentDistributionItem struct {
	Type  string `json:"type"`  // 类型：posts, comments, groups
	Name  string `json:"name"`  // 名称
	Count int64  `json:"count"` // 数量
}

// PostStatusDistributionItem 帖子状态分布项
type PostStatusDistributionItem struct {
	Status string `json:"status"` // 状态
	Name   string `json:"name"`   // 名称
	Count  int64  `json:"count"`  // 数量
}

// UserGrowthItem 用户增长项
type UserGrowthItem struct {
	Date     string `json:"date"`      // 日期
	NewUsers int64  `json:"new_users"` // 新增用户数
}

// PendingContentResponse 待审核内容响应
type PendingContentResponse struct {
	ID        string                `json:"id"`         // 内容ID
	Type      string                `json:"type"`       // 内容类型（post/comment）
	Title     string                `json:"title"`      // 标题（帖子有，评论可能为空）
	Content   string                `json:"content"`    // 内容
	Author    *PendingContentAuthor `json:"author"`     // 作者信息
	CreatedAt string                `json:"created_at"` // 创建时间
}

// PendingContentAuthor 待审核内容作者信息
type PendingContentAuthor struct {
	ID       string `json:"id"`       // 用户ID
	Username string `json:"username"` // 用户名
	Nickname string `json:"nickname"` // 昵称
	Avatar   string `json:"avatar"`   // 头像
}

// OnlineUsersResponse 在线用户数响应
type OnlineUsersResponse struct {
	Count int64 `json:"count"` // 在线用户数
}

// ==================== Cursor Pagination DTOs ====================

// CursorPageRequest 游标分页请求
type CursorPageRequest struct {
	Cursor    string `json:"cursor" form:"cursor"`       // 游标（首次请求为空）
	Direction string `json:"direction" form:"direction"` // forward | backward
	PageSize  int    `json:"page_size" form:"page_size"` // 每页数量
}

// CursorPageResponse 游标分页响应（泛型版本）
// 注意：由于 Go 的限制，这里使用 any 作为 Items 类型
// 实际使用时可以创建特定类型的响应结构体
type CursorPageResponse struct {
	Items      any    `json:"list"`
	NextCursor string `json:"next_cursor,omitempty"` // 下一页游标
	PrevCursor string `json:"prev_cursor,omitempty"` // 上一页游标（可选）
	HasMore    bool   `json:"has_more"`              // 是否有更多数据
}

// CursorPageMeta 分页元信息
type CursorPageMeta struct {
	PageSize  int    `json:"page_size"`
	Direction string `json:"direction"`
}

// PostCursorPageResponse 帖子游标分页响应
type PostCursorPageResponse struct {
	Items      []*PostResponse `json:"list"`
	NextCursor string          `json:"next_cursor,omitempty"`
	PrevCursor string          `json:"prev_cursor,omitempty"`
	HasMore    bool            `json:"has_more"`
	IsBlocked  bool            `json:"is_blocked,omitempty"`
}

// CommentCursorPageResponse 评论游标分页响应
type CommentCursorPageResponse struct {
	Items      []*CommentResponse `json:"list"`
	NextCursor string             `json:"next_cursor,omitempty"`
	PrevCursor string             `json:"prev_cursor,omitempty"`
	HasMore    bool               `json:"has_more"`
}

// MessageCursorPageResponse 消息游标分页响应
type MessageCursorPageResponse struct {
	Items      []*MessageResponse `json:"list"`
	NextCursor string             `json:"next_cursor,omitempty"`
	PrevCursor string             `json:"prev_cursor,omitempty"`
	HasMore    bool               `json:"has_more"`
}

// ConversationCursorPageResponse 会话游标分页响应
type ConversationCursorPageResponse struct {
	Items      []*ConversationResponse `json:"list"`
	NextCursor string                  `json:"next_cursor,omitempty"`
	PrevCursor string                  `json:"prev_cursor,omitempty"`
	HasMore    bool                    `json:"has_more"`
}

// GroupCursorPageResponse 群组游标分页响应
type GroupCursorPageResponse struct {
	Items      []*GroupResponse `json:"list"`
	NextCursor string           `json:"next_cursor,omitempty"`
	PrevCursor string           `json:"prev_cursor,omitempty"`
	HasMore    bool             `json:"has_more"`
}

// NotificationCursorPageResponse 通知游标分页响应
type NotificationCursorPageResponse struct {
	Items      []*NotificationResponse `json:"list"`
	NextCursor string                  `json:"next_cursor,omitempty"`
	PrevCursor string                  `json:"prev_cursor,omitempty"`
	HasMore    bool                    `json:"has_more"`
}

// GroupMemberCursorPageResponse 群成员游标分页响应
type GroupMemberCursorPageResponse struct {
	Items      []*GroupMemberResponse `json:"list"`
	NextCursor string                 `json:"next_cursor,omitempty"`
	PrevCursor string                 `json:"prev_cursor,omitempty"`
	HasMore    bool                   `json:"has_more"`
}

// GroupAnnouncementCursorPageResponse 群公告游标分页响应
type GroupAnnouncementCursorPageResponse struct {
	Items      []*GroupAnnouncementResponse `json:"list"`
	NextCursor string                       `json:"next_cursor,omitempty"`
	PrevCursor string                       `json:"prev_cursor,omitempty"`
	HasMore    bool                         `json:"has_more"`
}

// ==================== Verification DTOs ====================

// VerificationStatus 审核状态
type VerificationStatusDTO string

const (
	VerificationStatusNotSubmittedDTO VerificationStatusDTO = "not_submitted"
	VerificationStatusPendingDTO      VerificationStatusDTO = "pending"
	VerificationStatusApprovedDTO     VerificationStatusDTO = "approved"
	VerificationStatusRejectedDTO     VerificationStatusDTO = "rejected"
)

// UserIdentityDTO 用户身份类型
type UserIdentityDTO string

const (
	UserIdentityGeneralDTO  UserIdentityDTO = "general"
	UserIdentityStudentDTO  UserIdentityDTO = "student"
	UserIdentityTeacherDTO  UserIdentityDTO = "teacher"
	UserIdentityStaffDTO    UserIdentityDTO = "staff"
	UserIdentityAlumniDTO   UserIdentityDTO = "alumni"
	UserIdentityExternalDTO UserIdentityDTO = "external"
)

// SubmitVerificationRequest 提交认证申请请求
type SubmitVerificationRequest struct {
	Identity       UserIdentityDTO `json:"identity" binding:"required,oneof=student teacher staff alumni"`
	RealName       string          `json:"real_name" binding:"required,max=100"`
	StudentID      string          `json:"student_id" binding:"omitempty,max=50"`
	EmployeeID     string          `json:"employee_id" binding:"omitempty,max=50"`
	Department     string          `json:"department" binding:"omitempty,max=200"`
	ProofMaterials string          `json:"proof_materials" binding:"required"`
}

// VerificationRecordResponse 认证记录响应
type VerificationRecordResponse struct {
	ID             string `json:"id"`
	UserID         string `json:"user_id"`
	Identity       string `json:"identity"`
	Status         string `json:"status"`
	RealName       string `json:"real_name"`
	StudentID      string `json:"student_id,omitempty"`
	EmployeeID     string `json:"employee_id,omitempty"`
	Department     string `json:"department,omitempty"`
	ProofMaterials string `json:"proof_materials"`
	ReviewedAt     string `json:"reviewed_at,omitempty"`
	ReviewedBy     string `json:"reviewed_by,omitempty"`
	RejectReason   string `json:"reject_reason,omitempty"`
	CreatedAt      string `json:"created_at"`
	UpdatedAt      string `json:"updated_at"`
}

// VerificationStatusResponse 认证状态响应
type VerificationStatusResponse struct {
	Identity           string                      `json:"identity"`
	VerificationStatus string                      `json:"verification_status"`
	HasPendingRequest  bool                        `json:"has_pending_request"`
	LatestRecord       *VerificationRecordResponse `json:"latest_record,omitempty"`
}

// AdminVerificationListRequest 管理端认证列表请求
type AdminVerificationListRequest struct {
	Page     int    `form:"page" binding:"omitempty,min=1"`
	PageSize int    `form:"page_size" binding:"omitempty,min=1,max=100"`
	Status   string `form:"status" binding:"omitempty,oneof=pending approved rejected"`
	Keyword  string `form:"keyword" binding:"omitempty,max=100"`
}

// AdminVerificationListResponse 管理端认证列表响应
type AdminVerificationListResponse struct {
	ID           string `json:"id"`
	UserID       string `json:"user_id"`
	Username     string `json:"username"`
	Nickname     string `json:"nickname"`
	Avatar       string `json:"avatar"`
	Identity     string `json:"identity"`
	Status       string `json:"status"`
	RealName     string `json:"real_name"`
	StudentID    string `json:"student_id,omitempty"`
	EmployeeID   string `json:"employee_id,omitempty"`
	Department   string `json:"department,omitempty"`
	CreatedAt    string `json:"created_at"`
	ReviewedAt   string `json:"reviewed_at,omitempty"`
	ReviewerName string `json:"reviewer_name,omitempty"`
}

// AdminVerificationDetailResponse 管理端认证详情响应
type AdminVerificationDetailResponse struct {
	ID             string `json:"id"`
	UserID         string `json:"user_id"`
	Username       string `json:"username"`
	Nickname       string `json:"nickname"`
	Avatar         string `json:"avatar"`
	Identity       string `json:"identity"`
	Status         string `json:"status"`
	RealName       string `json:"real_name"`
	StudentID      string `json:"student_id,omitempty"`
	EmployeeID     string `json:"employee_id,omitempty"`
	Department     string `json:"department,omitempty"`
	ProofMaterials string `json:"proof_materials"`
	CreatedAt      string `json:"created_at"`
	ReviewedAt     string `json:"reviewed_at,omitempty"`
	ReviewedBy     string `json:"reviewed_by,omitempty"`
	ReviewerName   string `json:"reviewer_name,omitempty"`
	RejectReason   string `json:"reject_reason,omitempty"`
}

// AdminReviewVerificationRequest 管理端审核认证请求
type AdminReviewVerificationRequest struct {
	Approve      bool   `json:"approve"`
	RejectReason string `json:"reject_reason" binding:"omitempty,max=500"`
}

// ==================== Privacy & Account Deletion DTOs ====================

// PrivacySettingsRequest 隐私设置请求
type PrivacySettingsRequest struct {
	FollowersVisibility *string `json:"followers_visibility" binding:"omitempty,oneof=everyone following self"`
	FollowingVisibility *string `json:"following_visibility" binding:"omitempty,oneof=everyone following self"`
	PostsVisibility     *string `json:"posts_visibility" binding:"omitempty,oneof=everyone following self"`
	FavoritesVisibility *string `json:"favorites_visibility" binding:"omitempty,oneof=everyone following self"`
}

// PrivacySettingsResponse 隐私设置响应
type PrivacySettingsResponse struct {
	FollowersVisibility string `json:"followers_visibility"`
	FollowingVisibility string `json:"following_visibility"`
	PostsVisibility     string `json:"posts_visibility"`
	FavoritesVisibility string `json:"favorites_visibility"`
}

// RequestDeletionRequest 申请注销请求
type RequestDeletionRequest struct {
	Password string `json:"password" binding:"required"`
}

// DeletionStatusResponse 注销状态响应
type DeletionStatusResponse struct {
	IsPendingDeletion   bool   `json:"is_pending_deletion"`
	DeletionRequestedAt string `json:"deletion_requested_at,omitempty"`
	CoolDownDays        int    `json:"cool_down_days,omitempty"`
}