import { IndexedDBService, IQueueOperation } from './IndexedDBService';
/**
 * Operation Queue Manager
 * Handles FIFO queue of pending sync operations
 */
export declare class OperationQueue {
    private indexedDB;
    constructor(indexedDB: IndexedDBService);
    /**
     * Add operation to the end of the queue
     */
    enqueue(operation: Omit<IQueueOperation, 'id'>): Promise<void>;
    /**
     * Get the first operation from the queue (without removing it)
     * Returns null if queue is empty
     */
    peek(): Promise<IQueueOperation | null>;
    /**
     * Get all operations in the queue (sorted by timestamp FIFO)
     */
    getAll(): Promise<IQueueOperation[]>;
    /**
     * Remove a specific operation from the queue
     */
    remove(operationId: string): Promise<void>;
    /**
     * Remove the first operation from the queue and return it
     * Returns null if queue is empty
     */
    dequeue(): Promise<IQueueOperation | null>;
    /**
     * Clear all operations from the queue
     */
    clear(): Promise<void>;
    /**
     * Get the number of operations in the queue
     */
    size(): Promise<number>;
    /**
     * Check if queue is empty
     */
    isEmpty(): Promise<boolean>;
    /**
     * Get operations for a specific event ID
     */
    getOperationsForEvent(eventId: string): Promise<IQueueOperation[]>;
    /**
     * Remove all operations for a specific event ID
     */
    removeOperationsForEvent(eventId: string): Promise<void>;
    /**
     * Update retry count for an operation
     */
    incrementRetryCount(operationId: string): Promise<void>;
}