import {DropdownProvider} from '../DropdownProvider';
import ValidationUtil from '../../../definitions/validation/ValidationUtil';

/**
 * This class validates an instance of DropdownProvider. This is intended to be used by consumers of this library in
 * their tests to validate their implementations. Knowing products have incorporated this into their test suite will
 * allow breaking changes to be introduced in the library.
 */
export class DropdownProviderValidator {

  public static validate(dropdownProvider: DropdownProvider): void {
    DropdownProviderValidator.validateFunctions(dropdownProvider);
    DropdownProviderValidator.validateDropdownCreation(dropdownProvider);
    DropdownProviderValidator.validateDropdownShowingAndHiding(dropdownProvider);
    DropdownProviderValidator.validateDropdownItemShowingAndHiding(dropdownProvider);
  }

  private static validateFunctions(dropdownProvider: DropdownProvider): void {
    ValidationUtil.checkFunctionExists('dropdownProvider', dropdownProvider, 'create');
    ValidationUtil.checkFunctionExists('dropdownProvider', dropdownProvider, 'showAt');
    ValidationUtil.checkFunctionExists('dropdownProvider', dropdownProvider, 'hide');
    ValidationUtil.checkFunctionExists('dropdownProvider', dropdownProvider, 'disableItem');
    ValidationUtil.checkFunctionExists('dropdownProvider', dropdownProvider, 'enableItem');
  }

  private static validateDropdownCreation(dropdownProvider: DropdownProvider) {
    // TODO
  }

  private static validateDropdownShowingAndHiding(dropdownProvider: DropdownProvider) {
    // TODO
  }

  private static validateDropdownItemShowingAndHiding(dropdownProvider: DropdownProvider) {
    // TODO
  }

}