import { ZepClient } from "@getzep/zep-js";
import { BaseRetriever, BaseRetrieverInput } from "@langchain/core/retrievers";
import { Document } from "@langchain/core/documents";
/**
 * Configuration interface for the ZepRetriever class. Extends the
 * BaseRetrieverInput interface.
 *
 * @argument {string} sessionId - The ID of the Zep session.
 * @argument {string} url - The URL of the Zep API.
 * @argument {number} [topK] - The number of results to return.
 * @argument {string} [apiKey] - The API key for the Zep API.
 * @argument [searchScope] [searchScope] - The scope of the search: "messages" or "summary".
 * @argument [searchType] [searchType] - The type of search to perform: "similarity" or "mmr".
 * @argument {number} [mmrLambda] - The lambda value for the MMR search.
 * @argument {Record<string, unknown>} [filter] - The metadata filter to apply to the search.
 */
export interface ZepRetrieverConfig extends BaseRetrieverInput {
    sessionId: string;
    url: string;
    topK?: number;
    apiKey?: string;
    searchScope?: "messages" | "summary";
    searchType?: "similarity" | "mmr";
    mmrLambda?: number;
    filter?: Record<string, unknown>;
}
/**
 * Class for retrieving information from a Zep long-term memory store.
 * Extends the BaseRetriever class.
 * @example
 * ```typescript
 * const retriever = new ZepRetriever({
 *   url: "http:
 *   sessionId: "session_exampleUUID",
 *   topK: 3,
 * });
 * const query = "Can I drive red cars in France?";
 * const docs = await retriever.getRelevantDocuments(query);
 * ```
 */
export declare class ZepRetriever extends BaseRetriever {
    static lc_name(): string;
    lc_namespace: string[];
    get lc_secrets(): {
        [key: string]: string;
    } | undefined;
    get lc_aliases(): {
        [key: string]: string;
    } | undefined;
    zepClientPromise: Promise<ZepClient>;
    private sessionId;
    private topK?;
    private searchScope?;
    private searchType?;
    private mmrLambda?;
    private filter?;
    constructor(config: ZepRetrieverConfig);
    /**
     *  Converts an array of message search results to an array of Document objects.
     *  @param {MemorySearchResult[]} results - The array of search results.
     *  @returns {Document[]} An array of Document objects representing the search results.
     */
    private searchMessageResultToDoc;
    /**
     *  Converts an array of summary search results to an array of Document objects.
     *  @param {MemorySearchResult[]} results - The array of search results.
     *  @returns {Document[]} An array of Document objects representing the search results.
     */
    private searchSummaryResultToDoc;
    /**
     *  Retrieves the relevant documents based on the given query.
     *  @param {string} query - The query string.
     *  @returns {Promise<Document[]>} A promise that resolves to an array of relevant Document objects.
     */
    _getRelevantDocuments(query: string): Promise<Document[]>;
}