import { Metric } from "../../Metrics/Metric.cjs";
import { RequestFormatter } from "./types.cjs";

//#region src/Plugins/Reporter/ProcessingQueue.d.ts
/**
 * Processing Queue
 *
 * A scheduler for sending batches of metrics to a specified endpoint
 *
 * ```typescript
 * import { ProcessingQueue } from "@ui-perf/metrics";
 *
 * const Queue = new ProcessingQueue("https://my-analytics-service", metrics => {
 *   // optionally format outgoing data
 *   return JSON.stringify(metrics);
 * });
 * ```
 */
declare class ProcessingQueue<T extends Metric<any, any> = Metric<any, any>> {
  readonly url: string;
  readonly formatRequest: RequestFormatter;
  readonly queue: Map<string, T>;
  private readonly IDs;
  private scheduler;
  constructor(url: string, formatRequest?: RequestFormatter);
  /**
   * Enqueue
   *
   * Adds an item to the queue and schedules a request to the provided
   * destination
   */
  enqueue(item: T): Promise<boolean>;
  /**
   * Beacon
   *
   * Sends a request with the currently enqueued items to the server.
   * Resets the queue.
   */
  private beacon;
  /**
   * Schedule
   *
   * Schedules a request to the provided endpoint containing the
   * currently enqueued items
   */
  private schedule;
  /**
   * Cancel
   *
   * Cancels a currently scheduled request
   */
  private cancel;
  /**
   * Listen For Session End
   *
   * If the document is ever moved to the background or is closed, a request is
   * immediately sent to the provided destination containing the contents of
   * the queue
   */
  private readonly listenForSessionEnd;
  /**
   * Default Formatter
   *
   * Returns a stringified queue
   */
  private static readonly defaultFormatter;
}
//#endregion
export { ProcessingQueue };