import * as _backstage_backend_plugin_api from '@backstage/backend-plugin-api';
import { HttpAuthService, AuthService, DiscoveryService, BackstagePrincipalTypes, BackstageCredentials } from '@backstage/backend-plugin-api';
import { Request, Response } from 'express';

/**
 * @public
 * Options for creating a DefaultHttpAuthService.
 */
interface DefaultHttpAuthServiceOptions {
    auth: AuthService;
    discovery: DiscoveryService;
    pluginId: string;
    /**
     * Optionally override logic for extracting the token from the request.
     */
    getTokenFromRequest?: (req: Request) => {
        token?: string;
    };
}
/**
 * @public
 * DefaultHttpAuthService is the default implementation of the HttpAuthService
 */
declare class DefaultHttpAuthService implements HttpAuthService {
    #private;
    private constructor();
    static create(options: DefaultHttpAuthServiceOptions): DefaultHttpAuthService;
    credentials<TAllowed extends keyof BackstagePrincipalTypes = 'unknown'>(req: Request, options?: {
        allow?: Array<TAllowed>;
        allowLimitedAccess?: boolean;
    }): Promise<BackstageCredentials<BackstagePrincipalTypes[TAllowed]>>;
    issueUserCookie(res: Response, options?: {
        credentials?: BackstageCredentials;
    }): Promise<{
        expiresAt: Date;
    }>;
}
/**
 * Authentication of HTTP requests.
 *
 * See {@link @backstage/code-plugin-api#HttpAuthService}
 * and {@link https://backstage.io/docs/backend-system/core-services/http-auth | the service docs}
 * for more information.
 *
 * @public
 */
declare const httpAuthServiceFactory: _backstage_backend_plugin_api.ServiceFactory<HttpAuthService, "plugin", "singleton">;

export { DefaultHttpAuthService, httpAuthServiceFactory };
export type { DefaultHttpAuthServiceOptions };