/**
 * @file
 * JavaScript behaviors for webforms.
 */

(function ($, Drupal) {

  'use strict';

  /**
   * Remove single submit event listener.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches the behavior for removing single submit event listener.
   *
   * @see Drupal.behaviors.formSingleSubmit
   */
  Drupal.behaviors.weformRemoveFormSingleSubmit = {
    attach: function attach() {
      function onFormSubmit(e) {
        var $form = $(e.currentTarget);
        $form.removeAttr('data-drupal-form-submit-last');
      }
      $('body')
        .once('webform-single-submit')
        .on('submit.singleSubmit', 'form.webform-remove-single-submit:not([method~="GET"])', onFormSubmit);
    }
  };

  /**
   * Autofocus first input.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches the behavior for the webform autofocusing.
   */
  Drupal.behaviors.webformAutofocus = {
    attach: function (context) {
      $(context).find('.webform-submission-form.js-webform-autofocus :input:visible:enabled:first').focus();
    }
  };

  /**
   * Prevent webform autosubmit on wizard pages.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches the behavior for disabling webform autosubmit.
   *   Wizard pages need to be progressed with the Previous or Next buttons, not by pressing Enter.
   */
  Drupal.behaviors.webformDisableAutoSubmit = {
    attach: function (context) {
      // @see http://stackoverflow.com/questions/11235622/jquery-disable-form-submit-on-enter
      $(context).find('.webform-submission-form.js-webform-disable-autosubmit input')
        .not(':button, :submit, :reset, :image, :file')
        .once('webform-disable-autosubmit')
        .on('keyup keypress', function (e) {
          var keyCode = e.keyCode || e.which;
          if (keyCode === 13) {
            e.preventDefault();
            return false;
          }
        });
    }
  };

  /**
   * Skip client-side validation when submit button is pressed.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches the behavior for the skipping client-side validation.
   */
  Drupal.behaviors.webformSubmitNoValidate = {
    attach: function (context) {
      $(context).find(':submit.js-webform-novalidate').once('webform-novalidate').on('click', function () {
        $(this.form).attr('novalidate', 'novalidate');
      });
    }
  };

  /**
   * Attach behaviors to trigger submit button from input onchange.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches form trigger submit events.
   */
  Drupal.behaviors.webformSubmitTrigger = {
    attach: function (context) {
      $('[data-webform-trigger-submit]').once('webform-trigger-submit').on('change', function () {
        var submit = $(this).attr('data-webform-trigger-submit');
        $(submit).mousedown();
      });
    }
  };

  /**
   * Custom required error message.
   *
   * @type {Drupal~behavior}
   *
   * @prop {Drupal~behaviorAttach} attach
   *   Attaches the behavior for the webform custom required error message.
   *
   * @see http://stackoverflow.com/questions/5272433/html5-form-required-attribute-set-custom-validation-message
   */
  Drupal.behaviors.webformRequiredError = {
    attach: function (context) {
      $(context).find(':input[data-webform-required-error]').once('webform-required-error')
        .on('invalid', function () {
          this.setCustomValidity('');
          if (!this.valid) {
            this.setCustomValidity($(this).attr('data-webform-required-error'));
          }
        })
        .on('input, change', function () {
          // Find all related elements by name and reset custom validity.
          // This specifically applies to required radios and checkboxes.
          var name = $(this).attr('name');
          $(this.form).find(':input[name="' + name + '"]').each(function () {
            this.setCustomValidity('');
          });
        });
    }
  };

  // When #state:required is triggered we need to reset the target elements
  // custom validity.
  $(document).on('state:required', function (e) {
    $(e.target).filter('[data-webform-required-error]')
      .each(function () {this.setCustomValidity('');});
  });

  if (window.imceInput) {
    window.imceInput.processUrlInput = function (i, el) {
      var button = imceInput.createUrlButton(el.id, el.getAttribute('data-imce-type'));
      el.parentNode.insertAfter(button, el);
    };
  }

})(jQuery, Drupal);
