import { Metric } from "../../Metrics/Metric.mjs";
import { Plugin } from "../../Plugin/Plugin.mjs";

//#region src/Plugins/CriticalResources/CriticalResourcePlugin.d.ts
/**
 * Critical Resource Plugin
 *
 * A plugin designed to record Critical Path and Cache attributes
 * for a given metric. This plugin accepts a list of file extensions
 * and returns the underlying weight of collective resources required
 * to serve the metric to the browser. The aforementioned resources
 * are then calculated against any cache-hits producing a cache-
 * rate percentage
 *
 * ```typescript
 * const metric = new Metric("My Metric", {
 *   resources: new CriticalResourcePlugin(["js", "css"])
 * });
 * ```
 */
declare class CriticalResourcePlugin<T extends Metric<any, any> = Metric<any, any>> extends Plugin<T> {
  cacheRate: number;
  criticalSize: number;
  extensions: Set<string>;
  private static readonly browserSupport;
  constructor(extensions?: string[]);
  /**
   * Reset
   *
   * Resets the Metric's `cacheRate` and `criticalSize` back
   * to zero
   */
  protected reset(): void;
  /**
   * Stop
   *
   * Records the `criticalSize` and `cacheRate` of resources loaded
   * between the Metric's `start()` and `stop()` events
   */
  protected stop({
    startTime,
    stopTime
  }: T): void;
  /**
   * Iterate Resources
   *
   * Filters all loaded resources for those loaded within the
   * duration of the metric. Returns the total size (`criticalSize`)
   * and `cacheRate`
   */
  private iterateResources;
  /**
   * Parse Extension
   *
   * Returns a file extension associated with a given resource
   */
  private parseExtension;
  /**
   * To JSON
   *
   * Modifies the return value of the `CriticalResourcePlugin` interface
   * when passed to `JSON.stringify`
   */
  toJSON(): {
    cacheRate: number;
    criticalSize: number;
    extensions: string[];
    browserSupport: boolean;
  };
}
//#endregion
export { CriticalResourcePlugin };