import { IOAuthProvider, OAuthOptions, TokenData, ITokenStorage, OAuthCallbackHandler } from './interfaces.js';
/**
 * Service to manage OAuth flows for different email providers
 */
export declare class OAuthService {
    private oauthProvider;
    private tokenStorage;
    private server;
    private pendingCallbacks;
    /**
     * Create a new OAuthService
     * @param provider - The OAuth provider to use (Google, Outlook, etc.)
     * @param tokenStorage - Optional storage mechanism for tokens
     */
    constructor(provider?: IOAuthProvider, tokenStorage?: ITokenStorage);
    /**
     * Start the OAuth flow by opening a browser window to the authorization URL
     * Returns the authorization URL that was opened
     */
    startOAuthFlow(options: OAuthOptions, userId?: string, callbackPath?: string, port?: number): Promise<string>;
    /**
     * Handle the OAuth callback manually (without running a local server)
     * This is useful for server-side applications or when the callback is handled externally
     */
    handleCallback(code: string, options: OAuthOptions, userId?: string): Promise<TokenData>;
    /**
     * Refresh an access token using a refresh token
     */
    refreshToken(refreshToken: string, options: OAuthOptions, userId?: string): Promise<TokenData>;
    /**
     * Get tokens for a user from storage
     */
    getTokens(userId: string): Promise<TokenData | null>;
    /**
     * Revoke a token
     */
    revokeToken(token: string, options: OAuthOptions, userId?: string): Promise<boolean>;
    /**
     * Register a callback function to be called when the OAuth flow completes
     * Can be used instead of running a local server
     */
    registerCallback(state: string, callback: OAuthCallbackHandler): void;
    /**
     * Start a local server to handle the OAuth callback
     * @private
     */
    private startCallbackServer;
    /**
     * Stop the callback server if it's running
     * @private
     */
    private stopCallbackServer;
}