import type { ExecutionOptions, ExecutionResult } from '../types';
/**
 * Message handler for incoming transport messages
 */
export declare type MessageHandler<T = any> = (message: T) => Promise<any> | any;
/**
 * Transport connection status
 */
export declare enum TransportStatus {
    disconnected = "disconnected",
    connecting = "connecting",
    connected = "connected",
    error = "error"
}
/**
 * Transport events
 */
export interface TransportEvents {
    statusChange: (status: TransportStatus) => void;
    error: (error: Error) => void;
    message: (message: any) => void;
}
/**
 * Transport configuration options
 */
export interface TransportConfig {
    timeout?: number;
    spawnTimeout?: number;
    readyTimeout?: number;
    retryAttempts?: number;
    retryDelay?: number;
}
/**
 * Abstract Transport interface for communication between JSExecutor and execution environment
 */
export interface Transport {
    /**
     * Current transport status
     */
    readonly status: TransportStatus;
    /**
     * Initialize the transport connection
     * @param config - Transport configuration
     */
    initialize: (config?: TransportConfig) => Promise<void>;
    /**
     * Send a message through the transport
     * @param message - Message to send
     * @returns Promise resolving to response
     */
    send: <TRequest, TResponse>(message: TRequest) => Promise<TResponse>;
    /**
     * Register a message handler for incoming messages
     * @param handler - Message handler function
     */
    onMessage: <T>(handler: MessageHandler<T>) => void;
    /**
     * Execute code using this transport
     * @param code - JavaScript code to execute
     * @param args - Arguments to pass to the code
     * @param skdsEndpointUrl - SKDS endpoint URL
     * @param options - Execution options
     */
    execute?: (code: string, args: Record<string, any>, skdsEndpointUrl: string, options: Required<ExecutionOptions>) => Promise<ExecutionResult>;
    /**
     * Close the transport connection
     */
    close: () => Promise<void>;
    /**
     * Check if the transport is ready for communication
     */
    isReady: () => boolean;
}
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