export abstract class Config {
  // TODO use Map !!!! (like simi did in EventEmitter.ts)
  /** The config object. */
  private config: {
    [key: string]: Object;
  } = {};

  /** This method is a getter and setter for configurations. The key stands for the config (e.g. model).
   * The property is a sub property if the config (e.g. fields => model.fields).
   * If no config is given, the method just returns the configuration for the given property.
   * If a config is given, the property config is merged via Object.assign. */
  public configure?(key: string, property: string, config?: Object) {
    if (!this.config[key]) {
      this.config[key] = {};
    }
    if (!config) {
      return this.config[key][property];
    }
    if (!this.config[key][property]) {
      this.config[key][property] = {};
    }
    Object.assign(this.config[key][property], config);
    return this;
  }
}