//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
//++

// TODO move to UI components
angular.module('openproject.uiComponents')

.constant('FOCUSABLE_SELECTOR', 'a, button, :input, [tabindex], select')

.service('FocusHelper', ['$timeout', 'FOCUSABLE_SELECTOR', function($timeout, FOCUSABLE_SELECTOR) {
  FocusHelper = {
    getFocusableElement: function(element) {
      var focusable = element;

      if (!element.is(FOCUSABLE_SELECTOR)) {
        focusable = element.find(FOCUSABLE_SELECTOR);
      }

      return focusable[0];
    },

    focus: function(element) {
      var focusable = FocusHelper.getFocusableElement(element);

      focusable.focus();
    },

    focusElement: function(element) {
      $timeout(function() {
        FocusHelper.focus(element);
      });
    },

    focusSelect2Element: function(element) {
      var focusSelect2ElementRecursiv = function(retries) {
        $timeout(function() {
          element.select2('focus');

          var isSelect2Focused = angular.element(document.activeElement).hasClass('select2-input');

          if (!isSelect2Focused && retries > 0) {
            focusSelect2ElementRecursiv(--retries);
          }
        });
      }

      focusSelect2ElementRecursiv(3);
    }
  };

  return FocusHelper;
}]);