/**
 * Queue Manager - Offline queue with localStorage persistence
 */
import { BaseEvent } from '../types';
import { Logger } from '../utils/logger';
interface QueuedBatch {
    id: string;
    events: BaseEvent[];
    timestamp: number;
    attempts: number;
}
export declare class QueueManager {
    private queue;
    private maxQueueSize;
    private persistToStorage;
    private storageKey;
    private logger;
    constructor(maxQueueSize: number | undefined, persistToStorage: boolean | undefined, logger: Logger);
    /**
     * Enqueue a batch of events
     */
    enqueue(events: BaseEvent[]): string;
    /**
     * Dequeue next batch
     */
    dequeue(): QueuedBatch | null;
    /**
     * Peek at next batch without removing
     */
    peek(): QueuedBatch | null;
    /**
     * Re-queue a batch (for retry)
     */
    requeue(batch: QueuedBatch): void;
    /**
     * Remove a specific batch by ID
     */
    remove(batchId: string): void;
    /**
     * Get queue size
     */
    getSize(): number;
    /**
     * Get total event count in queue
     */
    getEventCount(): number;
    /**
     * Clear entire queue
     */
    clear(): void;
    /**
     * Save queue to localStorage
     */
    private saveToStorage;
    /**
     * Load queue from localStorage
     */
    private loadFromStorage;
    /**
     * Generate unique batch ID
     */
    private generateId;
}
export {};
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