/**
 * HTTP client for making requests to the RecallrAI API.
 */
import { AxiosResponse } from "axios";
import { RecallStrategy } from "../models";
/**
 * HTTP client for making requests to the RecallrAI API.
 */
export declare class HTTPClient {
    private client;
    private apiKey;
    private projectId;
    private baseUrl;
    private timeout;
    private _systemPromptCacheByStrategy;
    private _systemPromptCacheExpiresAt;
    /**
     * Initialize the HTTP client.
     *
     * @param apiKey - Your RecallrAI API key.
     * @param projectId - Your project ID.
     * @param baseUrl - The base URL for the RecallrAI API.
     * @param timeout - Request timeout in seconds.
     */
    constructor(apiKey: string, projectId: string, baseUrl: string, timeout?: number);
    /**
     * Filter out null and undefined values from params.
     */
    private filterParams;
    /**
     * Filter out null and undefined values from data.
     */
    private filterData;
    /**
     * Make a request to the RecallrAI API.
     *
     * @param method - HTTP method (GET, POST, PUT, DELETE).
     * @param path - API endpoint path.
     * @param params - Query parameters.
     * @param data - Request body data.
     * @returns The parsed JSON response.
     */
    request(method: string, path: string, params?: Record<string, any>, data?: Record<string, any>): Promise<AxiosResponse>;
    /**
     * Make a GET request.
     */
    get(path: string, params?: Record<string, any>): Promise<AxiosResponse>;
    /**
     * Make a POST request.
     */
    post(path: string, data?: Record<string, any>): Promise<AxiosResponse>;
    /**
     * Make a PUT request.
     */
    put(path: string, data?: Record<string, any>): Promise<AxiosResponse>;
    /**
     * Make a DELETE request.
     */
    delete(path: string, params?: Record<string, any>): Promise<AxiosResponse>;
    /**
     * Stream Server-Sent Events (SSE) from the API.
     */
    streamLines(path: string, params?: Record<string, any>): AsyncGenerator<string>;
    /**
     * Fetch the strategy-specific system prompt, caching it per strategy for one hour.
     */
    getCachedSystemPrompt(recallStrategy?: RecallStrategy): Promise<string>;
}