(function($) {

/**
 * Drupal FieldGroup object.
 */
Drupal.FieldGroup = Drupal.FieldGroup || {};
Drupal.FieldGroup.Effects = Drupal.FieldGroup.Effects || {};
Drupal.FieldGroup.groupWithfocus = null;

Drupal.FieldGroup.setGroupWithfocus = function(element) {
  element.css({display: 'block'});
  Drupal.FieldGroup.groupWithfocus = element;
}

/**
 * Implements Drupal.FieldGroup.processHook().
 */
Drupal.FieldGroup.Effects.processFieldset = {
  execute: function (context, settings, type) {
    if (type == 'form') {
      // Add required fields mark to any fieldsets containing required fields
      $('fieldset.fieldset').each(function(i){
        if ($(this).is('.required-fields') && $(this).find('.form-required').length > 0) {
          $('legend span.fieldset-legend', $(this)).eq(0).append(' ').append($('.form-required').eq(0).clone());
        }
        if ($('.error', $(this)).length) {
          $('legend span.fieldset-legend', $(this)).eq(0).addClass('error');
          Drupal.FieldGroup.setGroupWithfocus($(this));
        }
      });
    }
  }
}

/**
 * Implements Drupal.FieldGroup.processHook().
 */
Drupal.FieldGroup.Effects.processAccordion = {
  execute: function (context, settings, type) {
    var accordions = $('div.field-group-accordion-wrapper', context).accordion({
      autoHeight: false,
      active: 0,
      collapsible: true
    });
    if (type == 'form') {
      // Add required fields mark to any element containing required fields
      $('div.accordion-item').each(function(i){
        if ($(this).is('.required-fields') && $(this).find('.form-required').length > 0) {
          $('h3.ui-accordion-header').eq(i).append(' ').append($('.form-required').eq(0).clone());
        }
        if ($('.error', $(this)).length) {
          $('h3.ui-accordion-header').eq(i).addClass('error');
          var activeOne = $(this).parent().accordion("activate" , i);
          $('.ui-accordion-content-active', activeOne).css({height: 'auto', width: 'auto', display: 'block'});
        }
      });
    }
  }
}

/**
 * Implements Drupal.FieldGroup.processHook().
 */
Drupal.FieldGroup.Effects.processHtabs = {
  execute: function (context, settings, type) {
    if (type == 'form') {
      // Add required fields mark to any element containing required fields
      $('fieldset.horizontal-tabs-pane').each(function(i){
        if ($(this).is('.required-fields') && $(this).find('.form-required').length > 0) {
          $(this).data('horizontalTab').link.find('strong:first').after($('.form-required').eq(0).clone()).after(' ');
        }
        if ($('.error', $(this)).length) {
          $(this).data('horizontalTab').link.parent().addClass('error');
          Drupal.FieldGroup.setGroupWithfocus($(this));
          $(this).data('horizontalTab').focus();
        }
      });
    }
  }
}

/**
 * Implements Drupal.FieldGroup.processHook().
 */
Drupal.FieldGroup.Effects.processTabs = {
  execute: function (context, settings, type) {
    if (type == 'form') {
      // Add required fields mark to any fieldsets containing required fields
      $('fieldset.vertical-tabs-pane').each(function(i){
        if ($(this).is('.required-fields') && $(this).find('.form-required').length > 0) {
          $(this).data('verticalTab').link.find('strong:first').after($('.form-required').eq(0).clone()).after(' ');
        }
        if ($('.error', $(this)).length) {
          $(this).data('verticalTab').link.parent().addClass('error');
          Drupal.FieldGroup.setGroupWithfocus($(this));
          $(this).data('verticalTab').focus();
        }
      });
    }
  }
}

/**
 * Implements Drupal.FieldGroup.processHook().
 * 
 * TODO clean this up meaning check if this is really 
 *      necessary.
 */
Drupal.FieldGroup.Effects.processDiv = {
  execute: function (context, settings, type) {

    $('div.collapsible', context).each(function() {
      var $wrapper = $(this);

      // Turn the legend into a clickable link, but retain span.field-group-format-toggler
      // for CSS positioning.
      var $toggler = $('span.field-group-format-toggler:first', $wrapper);
      var $link = $('<a class="field-group-format-title" href="#"></a>');
      $link.prepend($toggler.contents()).appendTo($toggler);
      
      // .wrapInner() does not retain bound events.
      $link.click(function () {
        var wrapper = $wrapper.get(0);
        // Don't animate multiple times.
        if (!wrapper.animating) {
          wrapper.animating = true;
          var speed = $wrapper.hasClass('speed-fast') ? 300 : 1000;
          if ($wrapper.hasClass('effect-none') && $wrapper.hasClass('speed-none')) {
            $('> .field-group-format-wrapper', wrapper).toggle();
          }
          else if ($wrapper.hasClass('effect-blind')) {
            $('> .field-group-format-wrapper', wrapper).toggle('blind', {}, speed);
          }
          else {
            $('> .field-group-format-wrapper', wrapper).toggle(speed);
          }
          wrapper.animating = false;
        }
        $wrapper.toggleClass('collapsed');
        return false;
      });
      
    });
  }
};

/**
 * Behaviors.
 */
Drupal.behaviors.fieldGroup = {
  attach: function (context, settings) {
    if (settings.field_group == undefined) {
      return;
    }
    $('body', context).once('fieldgroup-effects', function () {
      // Execute all of them.
      $.each(Drupal.FieldGroup.Effects, function (func) {
        // We check for a wrapper function in Drupal.field_group as 
        // alternative for dynamic string function calls.
        var type = func.toLowerCase().replace("process", "");
        if (settings.field_group[type] != undefined && $.isFunction(this.execute)) {
          this.execute(context, settings, settings.field_group[type]);
        }
      });
    });

    // Fixes css for fieldgroups under vertical tabs.
    $('.fieldset-wrapper .fieldset > legend').css({display: 'block'});
    $('.vertical-tabs fieldset.fieldset').addClass('default-fallback');
    
  }
};

})(jQuery);;