import { BaseChannel } from './index';
/**
 * Email Channel — v1.0.0
 *
 * Supports two modes:
 * - webhook: Receives emails via HTTP POST (works with email forwarding services)
 * - imap: TODO - Full IMAP polling (complex, requires raw socket IMAP protocol)
 *
 * Sends via SMTP with STARTTLS support using Node.js built-in tls module.
 * No external dependencies (no nodemailer).
 */
export interface EmailChannelConfig {
    /** Mode: 'webhook' (recommended) or 'imap' (TODO) */
    mode?: 'webhook' | 'imap';
    smtp?: {
        host: string;
        port: number;
        user: string;
        pass: string;
        from?: string;
    };
    imap?: {
        host: string;
        port: number;
        user: string;
        password: string;
        tls?: boolean;
        mailbox?: string;
        pollInterval?: number;
    };
    /** Webhook server port (default: 8082) */
    webhookPort?: number;
    /** Filter: only process emails from these addresses */
    filters?: {
        from?: string[];
        subject?: string[];
    };
}
export interface EmailMessage {
    messageId: string;
    from: string;
    to: string[];
    cc?: string[];
    subject: string;
    body: string;
    html?: string;
    date: Date;
    inReplyTo?: string;
    references?: string[];
    threadId?: string;
}
export declare class EmailChannel extends BaseChannel {
    type: string;
    private config;
    private server;
    private processedIds;
    constructor(config: EmailChannelConfig);
    start(): Promise<void>;
    stop(): Promise<void>;
    /** Start webhook HTTP server */
    private startWebhook;
    /** Parse webhook payload into EmailMessage */
    static parseWebhookPayload(payload: any): EmailMessage | null;
    /** Convert email to internal Message */
    private emailToMessage;
    /** Check if email matches configured filters */
    matchesFilters(email: EmailMessage): boolean;
    /** Send email via SMTP with STARTTLS */
    sendEmail(to: string, subject: string, body: string, inReplyTo?: string): Promise<void>;
    /** Raw SMTP send with STARTTLS */
    private smtpSend;
    /** Read request body */
    private readBody;
}
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