/**
 * IMAP IDLE Watcher — real-time email monitoring.
 *
 * Maintains dedicated IMAP connections per account using IDLE to detect
 * new emails in real-time. Emits events on the shared event bus.
 *
 * Key design decisions:
 * - Separate ImapFlow connections from ConnectionManager (IDLE holds lock)
 * - Auto-reconnect with exponential backoff on connection failures
 * - Tracks last-seen UID per folder to detect genuinely new messages
 */
import type { AccountConfig, WatcherConfig } from '../types/index.js';
import type OAuthService from './oauth.service.js';
export interface WatcherStatus {
    account: string;
    folder: string;
    connected: boolean;
    lastSeenUid: number;
}
export default class WatcherService {
    private idleStates;
    private config;
    private accounts;
    private oauthService?;
    constructor(config: WatcherConfig, accounts: AccountConfig[], oauthService?: OAuthService);
    /**
     * IMAP credentials for an account, exchanging the refresh token for an
     * access token when the account uses OAuth2.
     *
     * The watcher builds its own connections rather than borrowing the pooled
     * ones, because IDLE holds the mailbox lock — so it also has to do its own
     * auth. It previously passed `account.password` as the access token, which
     * is undefined for an OAuth account, so IDLE could never authenticate and
     * the verification catcher and hooks were silently dead for exactly the
     * users Google and Microsoft are moving onto OAuth.
     */
    private static buildAuth;
    start(): Promise<void>;
    stop(): Promise<void>;
    getStatus(): WatcherStatus[];
    private static stateKey;
    private updateState;
    private startIdle;
    private connectIdle;
    private scheduleReconnect;
    private handleNewEmails;
}
//# sourceMappingURL=watcher.service.d.ts.map