(function () {
    /** @namespace */
    itm.Util = itm.Util || {};
    itm.Util.Point = itm.Class(
    /** @lends itm.Util.Point# */
    {
        /**
         * @class
         * @constructs
         *
         * @param {number|{x:number,y:number}|{top:number,left:number}}param
         * @param {number} [y]
         */
        init: function (param, y) {
            this.set(param, y);
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {itm.Util.Point} this
         */
        set: function (point, y) {
            if (typeof point == "number") {
                this.x = point;
                this.y = y != null ? y : point;
            }
            else {
                point = point || {};
                this.x = point.x != null ? point.x : point.left != null ? point.left : 0;
                this.y = point.y != null ? point.y : point.top != null ? point.top : 0;
            }
            this.synch();
            return this;
        },
        /**
         * update top and left properties from y and x
         * @returns {itm.Util.Point} this
         */
        synch: function () {
            this.top = this.y;
            this.left = this.x;
            return this;
        },
        /**
         * @returns {itm.Util.Point} clone
         */
        clone: function () {
            return new itm.Util.Point({x: this.x, y: this.y});
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {itm.Util.Point} this
         */
        add: function (point, y) {
            if (typeof point == "number") {
                this.x += point;
                this.y += y != null ? y : point;
            }
            else {
                this.x += point.x != null ? point.x : point.left;
                this.y += point.y != null ? point.y : point.top;
            }
            this.synch();
            return this;
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {itm.Util.Point} this
         */
        sub: function (point, y) {
            if (typeof point == "number") {
                this.x -= point;
                this.y -= y != null ? y : point;
            }
            else {
                this.x -= point.x != null ? point.x : point.left;
                this.y -= point.y != null ? point.y : point.top;
            }
            this.synch();
            return this;
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {itm.Util.Point} this
         */
        mul: function (point, y) {
            if (typeof point == "number") {
                this.x *= point;
                this.y *= y != null ? y : point;
            }
            else {
                this.x *= point.x != null ? point.x : point.left;
                this.y *= point.y != null ? point.y : point.top;
            }
            this.synch();
            return this;
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {itm.Util.Point} this
         */
        div: function (point, y) {
            if (typeof point == "number") {
                this.x /= point;
                this.y /= y != null ? y : point;
            }
            else {
                this.x /= point.x != null ? point.x : point.left;
                this.y /= point.y != null ? point.y : point.top;
            }
            this.synch();
            return this;
        },
        /**
         * @returns {itm.Util.Point} this
         */
        negate: function () {
            this.x = -this.x;
            this.y = -this.y;
            this.synch();
            return this;
        },
        /**
         * @returns {itm.Util.Point} this
         */
        invert: function () {
            this.x = 1 / this.x;
            this.y = 1 / this.y;
            this.synch();
            return this;
        },
        /**
         * @returns {{x: number, y: number}}
         */
        getXY: function () {
            return {x: this.x, y: this.y};
        },
        /**
         * @returns {{top: number, left: number}}
         */
        getTopLeft: function () {
            this.synch();
            return {top: this.top, left: this.left};
        },
        /**
         * @param {number|{x:number,y:number}|{top:number,left:number}}point
         * @param {number} [y]
         * @returns {boolean}
         */
        equals: function (point, y) {
            if (point instanceof itm.Util.Point) {
                return this.x == point.x && this.y == point.y;
            }
            else {
                return this.equals(new itm.Util.Point(point, y));
            }
        },
        /**
         * @param {function} fn
         * @returns {itm.Util.Point} this
         */
        doMath: function (fn) {
            this.x = fn(this.x);
            this.y = fn(this.y);
            this.synch();
            return this;
        },
        /**
         * @returns {itm.Util.Point} this
         */
        floor: function () {
            return this.doMath(Math.floor);
        },
        /**
         * @returns {itm.Util.Point} this
         */
        round: function () {
            return this.doMath(Math.round);
        },
        /**
         * @returns {itm.Util.Point} this
         */
        ceil: function () {
            return this.doMath(Math.ceil);
        },
        /**
         * @returns {itm.Util.Point} this
         */
        abs: function () {
            return this.doMath(Math.abs);
        },
        /**
         * @returns {number}
         */
        length: function () {
            return Math.sqrt(this.x * this.x + this.y * this.y);
        }
    });
})();