import { DequeueLoopConfig } from './types.js';

declare const QueueType: {
    readonly AUTODETECT: "AUTODETECT";
    readonly IN_MEMORY: "IN_MEMORY";
    readonly PERSISTENT: "PERSISTENT";
};
declare class Queue {
    private queue;
    startDequeueLoop: (config: DequeueLoopConfig) => Promise<void>;
    constructor(queueName: string, { queueType }?: {
        queueType?: string | undefined;
    });
    enqueue(item: unknown): void;
    /** Cumulative ack: delete every leased item with seq <= uptoSeq. */
    confirm(uptoSeq: number): void;
    /** Reset the lease cursor so unconfirmed items are re-handed (resend). */
    rewind(): void;
    /** Count of enqueued-but-unconfirmed items (drives the unsaved warning). */
    unconfirmedCount(): Promise<number> | number;
    /**
     * This function starts a loop to continually
     * dequeue items and process them appropriately
     * based on provided functions.
     */
    private _startDequeueLoop;
}

export { Queue, QueueType };