import { EventName, EventProperties } from '../../types/pixelEventsFormat';
export interface IQueueEventItem {
    id: string;
    name: EventName;
    properties: EventProperties;
    size: number;
    timestamp: number;
}
interface IEventQueueState {
    maxQueueCount: number;
    maxQueueSize: number;
    processInterval: number;
}
export declare class EventQueue {
    private static instance;
    private isDestroyed;
    private queues;
    private currentQueueIndex;
    private queueSizes;
    private state;
    private processTimer;
    private isFlushingLock;
    private readonly MAX_QUEUES;
    constructor(state?: IEventQueueState);
    private initializeEventListeners;
    private handleNetworkChange;
    private handleVisibilityChange;
    private startProcessTimer;
    private stopProcessTimer;
    private judgeCurrentQueueFull;
    enqueue: (eventName: EventName, eventProperties: EventProperties) => Promise<void>;
    private processQueues;
    private flush;
    private reEnqueueFailedEvents;
    destroy: () => Promise<void>;
    private ensureQueueConsistency;
    private validateState;
    private flushAll;
}
export declare const pixelEventQueue: EventQueue;
export {};