/**
 * Priority-based Request Queue
 * Processes high-priority requests first
 */
export declare enum Priority {
    LOW = 0,
    NORMAL = 1,
    HIGH = 2,
    CRITICAL = 3
}
export declare class PriorityRequestQueue {
    private queues;
    private processing;
    private maxConcurrent;
    private activeRequests;
    constructor(maxConcurrent?: number);
    /**
     * Add request with priority
     */
    add<T>(requestFn: () => Promise<T>, priority?: Priority): Promise<T>;
    /**
     * Process queue by priority
     */
    private processQueue;
    /**
     * Get next request by priority
     */
    private getNextRequest;
    /**
     * Check if there are pending requests
     */
    private hasPendingRequests;
    /**
     * Get queue statistics
     */
    getStats(): {
        totalPending: number;
        byPriority: {
            critical: number;
            high: number;
            normal: number;
            low: number;
        };
        activeRequests: number;
    };
    /**
     * Clear all queues
     */
    clear(): void;
    /**
     * Clear specific priority queue
     */
    clearPriority(priority: Priority): void;
}
export default PriorityRequestQueue;
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