import { SessionCheckResponse } from "../Dto";
export type SessionCheckResult = (Omit<SessionCheckResponse, "expiration_time"> & {
    expiration: number;
}) | null;
/**
 * Callback type for performing a session check.
 * @ignore
 */
type SessionCheckCallback = () => Promise<SessionCheckResult>;
/**
 * Callback type for handling session timeout events.
 * @ignore
 */
type SessionExpiredCallback = () => void;
/**
 * Manages scheduling for periodic and timeout-based session checks.
 *
 * @category SDK
 * @subcategory Internal
 * @param {number} checkInterval - The interval in milliseconds between periodic session checks.
 * @param {SessionCheckCallback} checkSession - The callback function to perform a session check.
 * @param {SessionExpiredCallback} onSessionExpired - The callback function to handle session timeout events.
 */
export declare class Scheduler {
    private intervalID;
    private timeoutID;
    private readonly checkInterval;
    private readonly checkSession;
    private readonly onSessionExpired;
    constructor(checkInterval: number, checkSession: SessionCheckCallback, onSessionExpired: SessionExpiredCallback);
    /**
     * Handles the session expiration when it is about to expire soon.
     * Stops any ongoing checks and schedules a timeout for the expiration.
     *
     * @param {number} timeToExpiration - The time in milliseconds until the session expires.
     */
    scheduleSessionExpiry(timeToExpiration: number): void;
    /**
     * Starts the session check process.
     * Determines when the next check should run based on the last known check time and session expiration.
     * If the session is expiring soon, schedules an expiration event instead of starting periodic checks.
     *
     * @param {number} lastCheck - The timestamp (in milliseconds) of the last session check.
     * @param {number} expiration - The timestamp (in milliseconds) of when the session expires.
     */
    start(lastCheck?: number, expiration?: number): void;
    /**
     * Stops the session check process and clears all timers.
     */
    stop(): void;
    /**
     * Checks if the scheduler is currently running.
     * @returns {boolean} True if the scheduler is running; otherwise, false.
     */
    isRunning(): boolean;
    /**
     * Checks if the session is about to expire.
     * @param {number} expiration - Timestamp when the session will expire.
     * @returns {boolean} True if the session is about to expire; otherwise, false.
     */
    sessionExpiresSoon(expiration: number): boolean;
    /**
     * Calculates the time until the next session check should occur.
     *
     * @param {number} lastCheck - The timestamp (in milliseconds) of the last session check.
     * @returns {number} The time in milliseconds until the next check should be performed.
     */
    calcTimeToNextCheck(lastCheck: number): number;
}
export {};