/**
 * @rajeev02/app-shell — Chat Module
 * Real-time messaging with offline queue, typing indicators, media messages, read receipts
 */
export type MessageType = "text" | "image" | "video" | "audio" | "document" | "location" | "contact" | "sticker";
export type MessageStatus = "sending" | "sent" | "delivered" | "read" | "failed";
export interface ChatMessage {
    id: string;
    roomId: string;
    senderId: string;
    type: MessageType;
    content: string;
    mediaUrl?: string;
    thumbnailUrl?: string;
    mediaSizeBytes?: number;
    replyTo?: string;
    forwardedFrom?: string;
    status: MessageStatus;
    timestamp: number;
    editedAt?: number;
    deletedAt?: number;
    reactions?: Record<string, string[]>;
    metadata?: Record<string, unknown>;
}
export interface ChatRoom {
    id: string;
    name?: string;
    type: "direct" | "group" | "channel" | "support";
    participants: string[];
    lastMessage?: ChatMessage;
    unreadCount: number;
    muted: boolean;
    pinned: boolean;
    createdAt: number;
    updatedAt: number;
}
export interface TypingIndicator {
    roomId: string;
    userId: string;
    isTyping: boolean;
    timestamp: number;
}
/**
 * Chat Engine — manages rooms, messages, offline queue
 */
export declare class ChatEngine {
    private rooms;
    private messages;
    private offlineQueue;
    private typingUsers;
    private listeners;
    private currentUserId;
    constructor(userId: string);
    /** Send a text message */
    sendMessage(roomId: string, content: string, type?: MessageType, replyTo?: string): ChatMessage;
    /** Receive a message (from server/websocket) */
    receiveMessage(message: ChatMessage): void;
    /** Mark a message as delivered/read */
    updateMessageStatus(messageId: string, roomId: string, status: MessageStatus): void;
    /** Mark all messages in room as read */
    markRoomAsRead(roomId: string): void;
    /** Delete a message (soft delete) */
    deleteMessage(messageId: string, roomId: string): void;
    /** Add reaction */
    addReaction(messageId: string, roomId: string, emoji: string): void;
    /** Set typing indicator */
    setTyping(roomId: string, isTyping: boolean): void;
    /** Handle remote typing indicator */
    onRemoteTyping(roomId: string, userId: string, isTyping: boolean): void;
    /** Get typing users in a room */
    getTypingUsers(roomId: string): string[];
    /** Get messages for a room */
    getMessages(roomId: string, limit?: number, before?: number): ChatMessage[];
    /** Get all rooms sorted by last activity */
    getRooms(): ChatRoom[];
    /** Get total unread count */
    getTotalUnread(): number;
    /** Get offline queue for syncing */
    getOfflineQueue(): ChatMessage[];
    /** Clear offline queue after successful sync */
    clearOfflineQueue(): void;
    /** Search messages across rooms */
    search(query: string, limit?: number): ChatMessage[];
    /** Subscribe to room events */
    onRoomEvent(roomId: string, listener: (event: ChatEvent) => void): () => void;
    private addMessage;
    private updateRoom;
    private emit;
}
export type ChatEvent = {
    type: "message_sent";
    message: ChatMessage;
} | {
    type: "message_received";
    message: ChatMessage;
} | {
    type: "message_deleted";
    messageId: string;
} | {
    type: "status_update";
    messageId: string;
    status: MessageStatus;
} | {
    type: "typing";
    userId: string;
    isTyping: boolean;
} | {
    type: "room_read";
    roomId: string;
};
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