/**
 * @author Martin Karkowski
 * @email m.karkowski@zema.de
 * @create date 2020-11-06 14:20:32
 * @modify date 2021-08-11 19:59:47
 * @desc [description]
 */

import { getSingleton } from "../helpers/singletonMethod";
import { INopeDispatcherOptions } from "../types/nope/nopeDispatcher.interface";
import { generateNopeBasicPackage } from "./generateNopeBasicPackage";
import { NopePackageLoader } from "./nopePackageLoader";

/**
 * Function to extract a Singleton Dispatcher
 * @param options The provided options for the Dispatcher
 */
export function getPackageLoader(options: INopeDispatcherOptions, singleton = true) {
  const create = () => {
    // Create a loader
    const loader = new NopePackageLoader();

    // load the default Package:
    loader.addPackage(generateNopeBasicPackage(options, singleton)).catch((e) => {
      throw e;
    });

    return loader;
  };

  if (singleton) {
    // Create a singaleton if required.
    // use the container to receive the
    // singleton object
    const container = getSingleton("nopeBackendPackageLoader.instance", create);

    return container.instance;
  }

  // No singleton is required => 
  // create a new instance.
  return create();
}