import { PostgreSQLAdapter } from '../PostgreSQLAdapter';
/**
 * Payload types for real-time events
 */
export interface RealtimePayload {
    schema: string;
    table: string;
    commit_timestamp: string;
    eventType: 'INSERT' | 'UPDATE' | 'DELETE';
    new: Record<string, unknown>;
    old: Record<string, unknown>;
    errors: string[] | null;
}
/**
 * Callbacks for real-time subscriptions
 */
export interface RealtimeCallbacks {
    onInsert?: (payload: RealtimePayload) => void;
    onUpdate?: (payload: RealtimePayload) => void;
    onDelete?: (payload: RealtimePayload) => void;
}
/**
 * Presence data for collaborative editing
 */
export interface PresenceData {
    userId: string;
    cursorPosition?: {
        line: number;
        column: number;
    };
    timestamp: number;
}
/**
 * Manages Supabase real-time subscriptions for collaborative editing
 */
export declare class RealtimeManager {
    private adapter;
    private channels;
    private logger?;
    constructor(adapter: PostgreSQLAdapter);
    /**
     * Subscribe to table changes for collaborative editing
     */
    subscribeToContent(contentId: string, callbacks: RealtimeCallbacks): () => void;
    /**
     * Subscribe to generic table changes
     */
    subscribeToTable(table: string, filter: string | null, callbacks: RealtimeCallbacks): () => void;
    /**
     * Broadcast presence for collaborative editing
     */
    broadcastPresence(contentId: string, userId: string, cursorPosition?: {
        line: number;
        column: number;
    }): Promise<void>;
    /**
     * Get current presence state for a channel
     */
    getPresence(contentId: string): Record<string, PresenceData[]> | null;
    /**
     * Unsubscribe from a specific channel
     */
    unsubscribe(contentId: string): Promise<void>;
    /**
     * Unsubscribe from all channels
     */
    unsubscribeAll(): Promise<void>;
    /**
     * Get active channel count
     */
    getActiveChannelCount(): number;
    /**
     * Check if a channel is active
     */
    isChannelActive(contentId: string): boolean;
}