import { DfFormAndFields, DfFormLayout, DfFormWithLayout } from './form-layout.model';

const EMPTY_FORMS: DfFormWithLayout[] = [
  {
    layout: DfFormLayout.OneColumn,
    fields: []
  }
];

export class DfFormLayoutUtils {
  /**
   * Get the forms or the field with the default layout from the config.
   * @param config Config, is not needed the whole config only a component that extends the configuration
   * A form that extends the forms
   * @return A list of forms with layout
   */
  public static getFormsWithLayout(config: DfFormAndFields): DfFormWithLayout[] {
    if (config?.fields && config?.forms) {
      console.error(
        'DfFormLayoutUtils: `fields` and `forms` was provided. Returning an empty form'
      );
      return EMPTY_FORMS;
    } else if (config?.fields) {
      return [
        {
          layout: config.defaultLayout || DfFormLayout.OneColumn,
          fields: config.fields
        }
      ];
    } else if (config?.forms) {
      return config.forms;
    } else {
      console.error(
        'DfFormLayoutUtils: Neither `fields` or `forms` was provided. Returning an empty form'
      );
      return EMPTY_FORMS;
    }
  }
}