Namespace.ts

import { WindowWrapper } from './WindowWrapper';

let _namespace: Namespace | undefined;

export class Namespace {
  private readonly key: string;

  static fromName(key: string): Namespace {
    if (!_namespace) {
      _namespace = new Namespace(key);
    }
    return _namespace;
  }

  static getInstance(): Namespace {
    if (!_namespace) {
      throw new Error('Create the instance by fromKeyname method before calling getInstance method');
    }
    return _namespace;
  }

  static removeInstance(): void {
    _namespace = void 0;
  }

  private constructor(key: string) {
    this.key = key;
  }

  namespace: () => any = () => {
    const window = WindowWrapper.getInstance().window;
    return window[this.key];
  }
}