import { Event, SessionInterface as Session, SessionsList } from './types';
import { BaseSessionService, ListEventsResponse } from './BaseSessionService';
interface VertexAiClient {
    request(options: {
        httpMethod: string;
        path: string;
        requestDict: Record<string, any>;
    }): Promise<any>;
}
interface GenAiClient {
    _apiClient: VertexAiClient;
}
/**
 * Connects to the managed Vertex AI Session Service
 */
export declare class VertexAiSessionService extends BaseSessionService {
    private project;
    private location;
    private apiClient;
    /**
     * Creates a new VertexAiSessionService
     *
     * @param project - The Google Cloud project ID
     * @param location - The Google Cloud location/region
     * @param client - Optional GenAi client to use for API calls
     */
    constructor(options: {
        project?: string;
        location?: string;
        client?: GenAiClient;
    });
    /**
     * Creates a new session in Vertex AI
     */
    createSession(options: {
        appName: string;
        userId: string;
        sessionId?: string;
        state?: Record<string, any>;
    }): Promise<Session>;
    /**
     * Gets a session by its ID
     */
    getSession(options: {
        appName: string;
        userId: string;
        sessionId: string;
    }): Promise<Session | null>;
    /**
     * Lists all sessions for a user in an app
     */
    listSessions(options: {
        appName: string;
        userId: string;
    }): Promise<SessionsList>;
    /**
     * Deletes a session
     */
    deleteSession(options: {
        appName: string;
        userId: string;
        sessionId: string;
    }): Promise<void>;
    /**
     * Lists events in a session
     */
    listEvents(options: {
        appName: string;
        userId: string;
        sessionId: string;
    }): Promise<ListEventsResponse>;
    /**
     * Appends an event to a session
     */
    appendEvent(options: {
        session: Session;
        event: Event;
    }): Promise<void>;
    /**
     * Updates a session's state.
     */
    updateSessionState(appName: string, userId: string, sessionId: string, stateDelta: Record<string, any>): Promise<Session>;
    /**
     * Parses a reasoning engine ID from an app name
     */
    private parseReasoningEngineId;
    /**
     * Converts an Event object to a JSON object for the API
     */
    private convertEventToJson;
    /**
     * Converts a Content object to a JSON object for the API
     */
    private convertContentToJson;
    /**
     * Converts a Part object to a JSON object for the API
     */
    private convertPartToJson;
    /**
     * Converts an API event to an Event object
     */
    private fromApiEvent;
    /**
     * Parses content from the API
     */
    private parseContent;
}
export {};