import ButtonStateManager from './states/ButtonStateManager';
import FrontendToolExecutor from './tools/FrontendToolExecutor';
import BackendToolExecutor from './tools/BackendToolExecutor';
import AllToolsRegistry from './tools/AllToolsRegistry';
import { VoiceFunction } from './_types/sharedTypes';
import { UrlStartupHandler } from './init/UrlStartupHandler';
declare class SistaAiEngine extends ButtonStateManager {
    private static singletonInstance;
    private readonly apiKey;
    private readonly apiUrl;
    private readonly scrapeContent;
    private readonly sdkVersion;
    readonly frontendToolExecutor: FrontendToolExecutor;
    readonly backendToolExecutor: BackendToolExecutor;
    readonly allToolsRegistry: AllToolsRegistry;
    private readonly scraper;
    private readonly user;
    private readonly audioPlayer;
    private readonly functionAggregator;
    private readonly navigationObserver;
    private readonly urlStart;
    private readonly autoStart;
    private readonly namespace;
    private sistaAiRealTimeSession;
    private openAiConnection;
    private audioElement;
    private heartbeatInterval;
    private isDisconnecting;
    private socket;
    private readonly sessionStateManager;
    private promptTokenSizes;
    voice: string | undefined;
    private cachedSessionId;
    readonly urlStarter: UrlStartupHandler;
    private static sharedUrlStarter;
    constructor(apiKey: string, apiUrl: string | undefined, userId: string | null | undefined, scrapeContent: boolean | undefined, debug: string | undefined, urlStart: boolean | undefined, autoStart: boolean | undefined, namespace: string);
    startProcessing(silent?: boolean, sessionId?: string): Promise<void>;
    private initializeWebSocketWithSistaAi;
    private createSistaAiSession;
    private initializeWebRTCWithOpenAi;
    private startHeartbeat;
    private handleHeartbeatError;
    disconnect(reason: 'user_disconnected' | 'rate_limited' | 'singleton' | 'error', silent?: boolean): Promise<void>;
    registerFunctions(voiceFunctions: VoiceFunction[]): void;
    private _resetEngine;
    static getInstance(): SistaAiEngine | null;
    getSessionId(): string | null;
    isDisconnectingState(): boolean;
    isScrapeContentEnabled(): boolean;
    private customerFacingErrorHandler;
    savePromptTokenSize(size: number): void;
    getAndClearPromptTokenSizes(): number[];
}
export default SistaAiEngine;