import { Client } from 'ssh2';
import { EventEmitter } from 'events';
export interface DeviceCredentials {
    host: string;
    port: number;
    username: string;
    password?: string;
    authMethod: 'password' | 'privateKey';
    privateKey?: string;
    passphrase?: string;
    deviceType: string;
    timeout?: number;
    keepAlive?: boolean;
    fastMode?: boolean;
    commandTimeout?: number;
    reuseConnection?: boolean;
    connectionPooling?: boolean;
}
export interface CommandResult {
    command: string;
    output: string;
    success: boolean;
    error?: string;
}
export declare class BaseConnection extends EventEmitter {
    protected client: Client;
    protected credentials: DeviceCredentials;
    protected isConnected: boolean;
    protected currentChannel: any;
    protected basePrompt: string;
    protected enabledPrompt: string;
    protected configPrompt: string;
    protected timeout: number;
    protected encoding: string;
    protected newline: string;
    protected returnChar: string;
    protected fastMode: boolean;
    protected commandTimeout: number;
    protected reuseConnection: boolean;
    protected connectionPooling: boolean;
    protected lastActivity: number;
    private static connectionPool;
    private static poolCleanupInterval;
    constructor(credentials: DeviceCredentials);
    private setupEventHandlers;
    connect(): Promise<void>;
    private validateCredentials;
    private tryConnect;
    disconnect(): Promise<void>;
    protected sessionPreparation(): Promise<void>;
    private createShellChannel;
    protected setBasePrompt(): Promise<void>;
    protected disablePaging(): Promise<void>;
    protected setTerminalWidth(): Promise<void>;
    protected writeChannel(data: string): Promise<void>;
    protected readChannel(timeout?: number): Promise<string>;
    protected readUntilPrompt(expectedPrompt?: string, timeout?: number): Promise<string>;
    sendCommand(command: string): Promise<CommandResult>;
    sendConfig(configCommands: string[]): Promise<CommandResult>;
    protected enterConfigMode(): Promise<void>;
    protected exitConfigMode(): Promise<void>;
    protected sanitizeOutput(output: string, command: string): string;
    getCurrentConfig(): Promise<CommandResult>;
    saveConfig(): Promise<CommandResult>;
    rebootDevice(): Promise<CommandResult>;
    isAlive(): boolean;
    healthCheck(): Promise<boolean>;
    getDeviceType(): string;
    getHost(): string;
    getConnectionInfo(): {
        host: string;
        port: number;
        deviceType: string;
        connected: boolean;
    };
    private setupConnectionPooling;
    private cleanupConnectionPool;
    private getConnectionKey;
    private getOptimizedAlgorithms;
    static forceCleanupConnectionPool(): void;
    static getConnectionPoolStatus(): {
        totalConnections: number;
        connections: string[];
    };
}