import type { IAsyncTaskQueue } from '../../shared/interfaces/async-task-queue.interface.js';
import type { QueueStats, Task, TaskResult } from './async-optimizer.types.js';
export declare class AsyncTaskQueue implements IAsyncTaskQueue {
    private queue;
    private processing;
    private completed;
    private failed;
    private workers;
    private maxWorkers;
    private maxQueueSize;
    private running;
    private stats;
    constructor(maxWorkers?: number, maxQueueSize?: number | null);
    addTask<T>(task: Omit<Task<T>, 'id' | 'createdAt' | 'retryCount'> & {
        id?: string;
    }): string | false;
    start(): Promise<boolean>;
    stop(): Promise<boolean>;
    private processNext;
    private processNextBatch;
    getResult(taskId: string): TaskResult | null;
    getTaskStatus(taskId: string): 'pending' | 'processing' | 'completed' | 'failed' | null;
    getStats(): QueueStats;
    private updateStats;
    onTaskCompleted(taskId: string, result: TaskResult): void;
    onTaskFailed(taskId: string, result: TaskResult): void;
    getNextTask(): Task | null;
    isRunning(): boolean;
    cancelTask(taskId: string): boolean;
    clear(): void;
    getCompletedTasks(): TaskResult[];
    getFailedTasks(): TaskResult[];
    retryTask(taskId: string): boolean;
    getQueueLength(): number;
    isQueueEmpty(): boolean;
    getProcessingTasks(): Task[];
    getTaskById(taskId: string): Task | null;
    getTasksByType(type: string): Task[];
    getTasksByPriority(priority: number): Task[];
}
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