import { SessionInterface as Session } from '../sessions/types';
import { BaseMemoryService, SearchMemoryResponse } from './BaseMemoryService';
/**
 * Configuration for the Vertex AI RAG memory service.
 */
export interface VertexAiRagConfig {
    /** The Vertex AI project */
    project: string;
    /** The location of the Vertex AI service */
    location: string;
    /** The RAG corpus name */
    ragCorpus: string;
    /** The number of contexts to retrieve */
    similarityTopK?: number;
    /** Only returns contexts with vector distance smaller than the threshold */
    vectorDistanceThreshold?: number;
}
/**
 * A memory service that uses Vertex AI RAG capabilities for semantic search.
 *
 * This implementation uses the Vertex AI embedding models to compute
 * embeddings for memory entries and perform semantic searches.
 */
export declare class VertexAiRagMemoryService implements BaseMemoryService {
    private config;
    private vertexRagStore;
    private vertexAi;
    private baseUrl;
    private auth;
    private memoryStore;
    /**
     * Creates a new VertexAiRagMemoryService
     * @param config The configuration for the service
     */
    constructor(config: VertexAiRagConfig);
    /**
     * Adds a session to the memory service.
     * @param session The session to add
     */
    addSessionToMemory(session: Session): Promise<void>;
    /**
     * Uploads a file to the Vertex AI RAG corpus.
     *
     * @param corpusName The name of the corpus
     * @param filePath The path to the file
     * @param displayName The display name to store session info
     */
    private uploadFile;
    /**
     * Searches for sessions that match the query.
     * @param appName The name of the application
     * @param userId The id of the user
     * @param query The query to search for
     * @returns A SearchMemoryResponse containing the matching memories
     */
    searchMemory(appName: string, userId: string, query: string): Promise<SearchMemoryResponse>;
    /**
     * Calls Vertex AI RAG retrieval query.
     *
     * @param text The text to search for
     * @returns The retrieval query response
     */
    private retrieveContexts;
    /**
     * Formats the RAG corpus name to include project and location if not already included.
     *
     * @param corpusName The corpus name to format
     * @returns The formatted corpus name
     */
    private formatRagCorpusName;
    /**
     * Merges event lists that have overlapping timestamps.
     *
     * @param eventLists Lists of events to merge
     * @returns Merged event lists
     */
    private mergeEventLists;
    /**
     * Stores a memory entry.
     * @param appName The application name
     * @param userId The user ID
     * @param key The memory key
     * @param value The memory value
     */
    store(appName: string, userId: string, key: string, value: any): Promise<void>;
    /**
     * Retrieves a memory entry.
     * @param appName The application name
     * @param userId The user ID
     * @param key The memory key
     * @returns The memory value, or undefined if not found
     */
    retrieve(appName: string, userId: string, key: string): Promise<any | undefined>;
    /**
     * Deletes a memory entry.
     * @param appName The application name
     * @param userId The user ID
     * @param key The memory key
     */
    delete(appName: string, userId: string, key: string): Promise<void>;
}