/**
 * SMTP Client Command Handler
 * SMTP command sending and response parsing
 */
import { EventEmitter } from 'node:events';
import type { ISmtpConnection, ISmtpResponse, ISmtpClientOptions, ISmtpCapabilities } from './interfaces.js';
export declare class CommandHandler extends EventEmitter {
    private options;
    private responseBuffer;
    private pendingCommand;
    private commandTimeout;
    constructor(options: ISmtpClientOptions);
    /**
     * Send EHLO command and parse capabilities
     */
    sendEhlo(connection: ISmtpConnection, domain?: string): Promise<ISmtpCapabilities>;
    /**
     * Send MAIL FROM command
     */
    sendMailFrom(connection: ISmtpConnection, fromAddress: string): Promise<ISmtpResponse>;
    /**
     * Send RCPT TO command
     */
    sendRcptTo(connection: ISmtpConnection, toAddress: string): Promise<ISmtpResponse>;
    /**
     * Send DATA command
     */
    sendData(connection: ISmtpConnection): Promise<ISmtpResponse>;
    /**
     * Send email data content
     */
    sendDataContent(connection: ISmtpConnection, emailData: string): Promise<ISmtpResponse>;
    /**
     * Send RSET command
     */
    sendRset(connection: ISmtpConnection): Promise<ISmtpResponse>;
    /**
     * Send NOOP command
     */
    sendNoop(connection: ISmtpConnection): Promise<ISmtpResponse>;
    /**
     * Send QUIT command
     */
    sendQuit(connection: ISmtpConnection): Promise<ISmtpResponse>;
    /**
     * Send STARTTLS command
     */
    sendStartTls(connection: ISmtpConnection): Promise<ISmtpResponse>;
    /**
     * Send AUTH command
     */
    sendAuth(connection: ISmtpConnection, method: string, credentials?: string): Promise<ISmtpResponse>;
    /**
     * Send a generic SMTP command
     */
    sendCommand(connection: ISmtpConnection, command: string): Promise<ISmtpResponse>;
    /**
     * Send raw data without command formatting
     */
    sendRawData(connection: ISmtpConnection, data: string): Promise<ISmtpResponse>;
    /**
     * Wait for server greeting
     */
    waitForGreeting(connection: ISmtpConnection): Promise<ISmtpResponse>;
    private handleIncomingData;
    private isCompleteResponse;
}