import { BaseRetrievalTool, RetrievalToolOptions } from './BaseRetrievalTool';
import { ToolContext } from '../ToolContext';
/**
 * RAG resource interface (placeholder)
 * In a real implementation, this would match the Vertex AI RAG SDK types
 */
export interface RagResource {
    name: string;
    [key: string]: any;
}
/**
 * Options for creating a Vertex AI RAG retrieval tool
 */
export interface VertexAiRagRetrievalOptions extends RetrievalToolOptions {
    /**
     * RAG corpora to retrieve from
     */
    ragCorpora?: string[];
    /**
     * RAG resources to retrieve from
     */
    ragResources?: RagResource[];
    /**
     * Maximum number of top results to return
     */
    similarityTopK?: number;
    /**
     * Threshold for vector distance to filter results
     */
    vectorDistanceThreshold?: number;
}
/**
 * LLM request interface (simplified)
 */
interface LlmRequest {
    model?: string;
    config?: any;
}
/**
 * Retrieval tool that uses Vertex AI RAG to retrieve information
 */
export declare class VertexAiRagRetrieval extends BaseRetrievalTool {
    /**
     * Configuration for Vertex AI RAG
     */
    private vertexRagStore;
    /**
     * Create a new Vertex AI RAG retrieval tool
     *
     * @param options Options for the Vertex AI RAG retrieval tool
     */
    constructor(options: VertexAiRagRetrievalOptions);
    /**
     * Process an LLM request to add RAG capabilities
     *
     * @param options The options for processing
     * @returns Nothing
     */
    processLlmRequest(options: {
        toolContext: ToolContext;
        llmRequest: LlmRequest;
    }): Promise<void>;
    /**
     * Retrieve information from Vertex AI RAG
     *
     * @param query The query to retrieve information for
     * @param maxResults Maximum number of results to return
     * @param context The context for the retrieval
     * @returns The retrieved information
     */
    protected retrieve(query: string, maxResults: number, context: ToolContext): Promise<string | string[]>;
    /**
     * Placeholder implementation of the Vertex AI RAG API
     *
     * @param options Options for the retrieval query
     * @returns A mock response
     */
    private retrievalQuery;
}
export {};