import { Handlers } from '../helper/handlers'
import { Handler, HandlerResolve } from '../helper/handler'
import { AuthMethod } from '../helper/authMethod'
import { ObfsBuilder } from '../obfs/obfs'
/**
 *  The Client class is responsible for creating a TCP socket connection,
 *  and communicate with a standard SOCKS server
 */
export declare class Client {
  /**
   * SOCKS server host
   */
  private readonly host
  /**
   * SOCKS server port
   */
  private readonly port
  /**
   * The object which contains all default handlers
   */
  private readonly handlers
  /**
   * The main event object
   */
  private readonly event
  /**
   * Server protocol version
   */
  private readonly version
  /**
   * userId for identification in v4
   */
  private readonly userId?
  private readonly tls?
  obfs: ObfsBuilder
  constructor(
    port: number,
    host: string,
    version: 4 | 5,
    obfs: ObfsBuilder,
    userId?: string,
    tls?: boolean
  )
  /**
   * The connector method establishes a TCP connection to the proxy server
   * @param port - Proxy server port
   * @param host - Proxy server host
   * @param cmd - Request command
   * @param resolve - This function fires after the server response
   * @param reject - This function fires after the server response if any error occurs
   * @param version - SOCKS version
   * @param userId - UserId for identification in SOCKS4
   */
  private connector
  /**
   * Sends a bind request
   * @param port - Target port
   * @param host - Target host address
   * @param version - Server protocol version
   * @returns void
   */
  bind(
    port: number,
    host: string,
    version?: 4 | 5,
    userId?: string
  ): Promise<HandlerResolve>
  /**
   * Sends an associate request
   * @param port - Target port
   * @param host - Target host address
   * @param version - Server protocol version
   * @returns void
   */
  associate(
    port: number,
    host: string,
    version?: 4 | 5
  ): Promise<HandlerResolve>
  /**
   * Sends a connect request
   * @param port - Target port
   * @param host - Target host address
   * @param version - Server protocol version
   * @param userId - userId for identification in v4
   * @returns void
   */
  connect(
    port: number,
    host: string,
    version?: 4 | 5,
    userId?: string
  ): Promise<HandlerResolve>
  /**
   * Get the handler function, and push it into this.handlers.req
   * @param handler - Emitted when the socks5 client sends an authentication request
   * @returns Client
   */
  useAuth(handler: AuthMethod): Client
  /**
   * Get the handler function, and update this.handlers.req
   * @param cmd - Specify handler type (connect | associate | bind)
   * @param handler - Emitted when new request appears
   * @returns Server
   */
  useReq(cmd: keyof Handlers['req'], handler: Handler): Client
  /**
   * Get the handler function, and update this.handlers.obfs
   * @param handler - Emitted when new request appears
   * @returns Server
   */
  useObfs(handler: ObfsBuilder): Client
}
/**
 * Open new connection and connect to server
 * @param port - Server port
 * @param host - Server address
 * @param version - Server protocol version
 * @param obfs - Obfuscation Method
 * @param userId - userId for identification in v4
 * @returns void
 */
export declare const connect: (
  port: number,
  host: string,
  version: 4 | 5,
  userId?: string,
  tls?: boolean
) => Client