(function () {
    "use strict";

    angular.module("shared")
        .service("scrollService", ["$document", "$q", function ($document, $q) {

            return {
                scrollToSelector: scrollToSelector,
                scrollToTopOfElement: scrollToTopOfElement,
                scrollToTopOfPage: scrollToTopOfPage
            };

            function scrollToSelector(selector, duration, easing, complete) {
                var elmnt = angular.element(selector);
                return $q.when(
                    angular.element($document[0].documentElement).animate({scrollTop: elmnt.offset().top}, duration, easing, complete)
                        .promise());
            }

            function scrollToTopOfElement(elementId, duration, easing, complete) {
                return scrollToSelector('#' + elementId, duration, easing, complete);
            }

            function scrollToTopOfPage(duration) {
                var elmnt = angular.element($document[0].body);
                return $q.when(
                    angular.element($document[0].documentElement).animate({scrollTop: elmnt.offset().top}, duration)
                        .promise());
            }

        }]);
})();