import { Storage } from "@google-cloud/storage";
import { Document } from "@langchain/core/documents";
import { Docstore } from "langchain/stores/doc/base";
/**
 * Interface that defines the configuration for the
 * GoogleCloudStorageDocstore. It includes the bucket name and an optional
 * prefix.
 */
export interface GoogleCloudStorageDocstoreConfiguration {
    /** The identifier for the GCS bucket */
    bucket: string;
    /**
     * An optional prefix to prepend to each object name.
     * Often used to create a pseudo-hierarchy.
     */
    prefix?: string;
}
/**
 * Class that provides an interface for interacting with Google Cloud
 * Storage (GCS) as a document store. It extends the Docstore class and
 * implements methods to search, add, and add a document to the GCS
 * bucket.
 */
export declare class GoogleCloudStorageDocstore extends Docstore {
    bucket: string;
    prefix: string;
    storage: Storage;
    constructor(config: GoogleCloudStorageDocstoreConfiguration);
    /**
     * Searches for a document in the GCS bucket and returns it as a Document
     * instance.
     * @param search The name of the document to search for in the GCS bucket
     * @returns A Promise that resolves to a Document instance representing the found document
     */
    search(search: string): Promise<Document>;
    /**
     * Adds multiple documents to the GCS bucket.
     * @param texts An object where each key is the name of a document and the value is the Document instance to be added
     * @returns A Promise that resolves when all documents have been added
     */
    add(texts: Record<string, Document>): Promise<void>;
    /**
     * Adds a single document to the GCS bucket.
     * @param name The name of the document to be added
     * @param document The Document instance to be added
     * @returns A Promise that resolves when the document has been added
     */
    addDocument(name: string, document: Document): Promise<void>;
    /**
     * Gets a file from the GCS bucket.
     * @param name The name of the file to get from the GCS bucket
     * @returns A File instance representing the fetched file
     */
    private getFile;
}