define(['angular'], function (angular) {
    var ClaimsInfo = angular.module('claimsinfo', []);

    ClaimsInfo.controller('ClaimsInfoController', ['$scope', function ($scope) {
        function currentYPosition() {
            // Firefox, Chrome, Opera, Safari
            if (self.pageYOffset)
                return self.pageYOffset;

            // Internet Explorer 6 - standards mode
            if (document.documentElement && document.documentElement.scrollTop)
                return document.documentElement.scrollTop;

            // Internet Explorer 6, 7 and 8
            if (document.body.scrollTop)
                return document.body.scrollTop;

            return 0;
        }

        function elmYPosition(eID) {
            var elm = document.getElementById(eID),
                y = elm.offsetTop,
                node = elm;

            while (node.offsetParent && node.offsetParent != document.body) {
                node = node.offsetParent;
                y += node.offsetTop;
            }

            if (window.innerWidth >= 768) 
                y -= 78;

            return y;
        }

        $scope.scrollToAnchor = function (eID) {
            var startY = currentYPosition(),
                stopY = elmYPosition(eID);

            var distance = stopY > startY ? stopY - startY : startY - stopY;
            var speed = Math.round(distance / 100);

            if (speed >= 20)
                speed = 20;

            var step = Math.round(distance / 25),
                leapY = stopY > startY ? startY + step : startY - step,
                timer = 0;

            if (stopY > startY) {
                for (var i = startY; i < stopY; i += step) {
                    setTimeout("window.scrollTo(0, " + leapY + ")", timer * speed);
                    leapY += step;

                    if (leapY > stopY)
                        leapY = stopY;

                    timer++;
                }

                return;
            }

            for (var i = startY; i > stopY; i -= step) {
                setTimeout("window.scrollTo(0, " + leapY + ")", timer * speed);
                leapY -= step;

                if (leapY < stopY)
                    leapY = stopY;

                timer++;
            }
        };
    }]);

    return ClaimsInfo;
});