import SessionsRequest from '../SessionsRequest';
/**
 * SessionsRequestHandler - Orchestrates request queuing and processing
 */
export default class SessionsRequestHandler {
    private _core;
    private _coreStorage;
    private _expirationManager;
    private _queue;
    private _sendabilityPolicy;
    private _retryPolicy;
    private _flushController;
    private _expirationRecovery;
    private _requestProcessor;
    onRequestQueued: ((sessionRequest: SessionsRequest) => void)[];
    onWillSendRequest: ((sessionRequest: SessionsRequest) => void)[];
    onRequestSent: ((sessionRequest: SessionsRequest) => void)[];
    /**
     * Constructor
     * @param options - Optional configuration options
     */
    constructor(options?: any);
    /**
     * Destroy the request handler
     */
    destroy(): void;
    /**
     * Update the maximum waiting requests limit
     * @param maxWaitingRequests - New maximum limit
     */
    setMaxWaitingRequests(maxWaitingRequests: number): void;
    /**
     * Enqueue a request
     * @param request - Request to be enqueued
     * @returns true if queued, false if dropped
     */
    queueRequest(request: SessionsRequest): boolean;
    /**
     * Flush the request queue
     * @param timeoutMs - Timeout in milliseconds
     * @returns Promise that resolves when the request queue is flushed
     */
    flush(timeoutMs: number): Promise<unknown>;
    /**
     * Destroy the current session synchronously without firing SESSION_EXPIRE
     * and without auto-recovery. Drops any queued requests. After this call the
     * handler is still usable — the host app can start a new session right away.
     */
    destroySession(): void;
    /**
     * Check if session has expired
     * @returns true if expired
     */
    hasExpired(): boolean;
    /**
     * Check whether the session is active (can queue events)
     * @returns true if active
     */
    isActive(): boolean;
    /**
     * Check whether session can accept events
     * @returns true if queueable
     */
    private _queueableEvent;
    /**
     * Get the last start and stop indices in the request array
     * @returns Object containing the last start and stop indices
     */
    private _getLastStartStopIndices;
    /**
     * Check if should send stats (for compatibility)
     * @returns true if session is started
     */
    shouldSendStats(): boolean;
}