import { App } from 'firebase-admin/app';
import { Database } from 'firebase-admin/database';
import { StreamManager, ActionStreamInput, ActionStreamSubscriber } from 'genkit/beta';

/**
 * Copyright 2025 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

interface RtdbStreamManagerOptions {
    firebaseApp?: App;
    db?: Database;
    refPrefix?: string;
    timeout?: number;
}
declare class RtdbStreamManager implements StreamManager {
    private db;
    private refRoot;
    private timeout;
    constructor(opts: RtdbStreamManagerOptions);
    open<S, O>(streamId: string): Promise<ActionStreamInput<S, O>>;
    subscribe<S, O>(streamId: string, callbacks: ActionStreamSubscriber<S, O>): Promise<{
        unsubscribe: () => void;
    }>;
}

export { RtdbStreamManager, type RtdbStreamManagerOptions };