/// <reference types="node" />

import { EventEmitter } from 'events';
import { Readable } from 'stream';

import { Transport, TransportOptions } from '..';

import * as shared from './shared';

import Mail = require('./mailer');
import MailMessage = require('./mailer/mail-message');
import MimeNode = require('./mime-node');

declare namespace StreamTransport {
    type MailOptions = Mail.Options;

    interface Options extends MailOptions, TransportOptions {
        streamTransport: true;
        /** if true, then returns the message as a Buffer object instead of a stream */
        buffer?: boolean;
        /** either ‘windows’ or ‘unix’ (default). Forces all newlines in the output to either use Windows syntax <CR><LF> or Unix syntax <LF> */
        newline?: string;
    }

    interface SentMessageInfo {
        /** an envelope object {from:‘address’, to:[‘address’]} */
        envelope: MimeNode.Envelope;
        /** the Message-ID header value */
        messageId: string;
        /** either stream (default) of buffer depending on the options */
        message: Buffer | Readable;
    }
}

declare class StreamTransport implements Transport {
    options: StreamTransport.Options;

    logger: shared.Logger;
    mailer: Mail;

    name: string;
    version: string;

    winbreak: boolean;

    constructor(options: StreamTransport.Options);

    /** Compiles a mailcomposer message and forwards it to handler that sends it */
    send(mail: MailMessage, callback: (err: Error | null, info: StreamTransport.SentMessageInfo) => void): void;
}

export = StreamTransport;