import { SDKClient, grpcChannel } from '@browserstack/wdio-browserstack-service';
import type { TestFrameworkEventRequest, TestSessionEventRequest, LogCreatedEventRequest, DriverInitRequest, FetchDriverExecuteParamsEventRequest, ConnectBinSessionResponse, StartBinSessionResponse, TestFrameworkEventResponse, TestSessionEventResponse, LogCreatedEventResponse, DriverInitResponse, FetchDriverExecuteParamsEventResponse } from '@browserstack/wdio-browserstack-service';
import { BStackLogger } from './cliLogger.js';
/**
 * GrpcClient - Singleton class for managing gRPC client connections
 *
 * This class uses the singleton pattern to ensure only one gRPC client instance exists
 * throughout the application lifecycle.
 */
export declare class GrpcClient {
    #private;
    binSessionId: string | undefined;
    listenAddress: string | undefined;
    channel: grpcChannel | null;
    client: SDKClient | null;
    logger: typeof BStackLogger;
    constructor();
    /**
     * Get the singleton instance of GrpcClient
     * @returns {GrpcClient} The singleton instance
     */
    static getInstance(): GrpcClient;
    /**
     * Initialize the gRPC client connection
     * @param {string} host The gRPC server host
     * @param {number} port The gRPC server port
     */
    init(params: Record<string, string>): void;
    /**
     * Connect to the gRPC server
     * @returns {void}
     */
    connect(): void;
    startBinSession(wdioConfig: string): Promise<StartBinSessionResponse>;
    /**
     * Connect to the bin session
     * @returns {Promise<Object>} The response from the gRPC call
     */
    connectBinSession(): Promise<ConnectBinSessionResponse>;
    /**
     * Stop the bin session
     * @returns {Promise<void>}
     * @private
     */
    stopBinSession(): Promise<unknown>;
    testSessionEvent(data: Omit<TestSessionEventRequest, 'binSessionId'>): Promise<TestSessionEventResponse>;
    /**
     *
     * Send TestFrameworkEvent
     */
    testFrameworkEvent(data: Omit<TestFrameworkEventRequest, 'binSessionId'>): Promise<TestFrameworkEventResponse>;
    /**
     *
     * Send driverInitEvent
     */
    driverInitEvent(data: Omit<DriverInitRequest, 'binSessionId'>): Promise<DriverInitResponse>;
    logCreatedEvent(data: Omit<LogCreatedEventRequest, 'binSessionId'>): Promise<LogCreatedEventResponse>;
    fetchDriverExecuteParamsEvent(data: Omit<FetchDriverExecuteParamsEventRequest, 'binSessionId'>): Promise<FetchDriverExecuteParamsEventResponse>;
    /**
     * Get the gRPC channel
     * @returns {grpc.Channel} The gRPC channel
     */
    getClient(): SDKClient | null;
    /**
     * Get the gRPC channel
     * @returns {grpc.Channel} The gRPC channel
     */
    getChannel(): grpcChannel | null;
}
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