var Clamp = require('../math/Clamp'); 
var Class = require('../utils/Class'); 
var SnapFloor = require('../math/snap/SnapFloor'); 
var Vector2 = require('../math/Vector2'); 
var Size = new Class({ 
initialize: function Size(width, height, aspectMode, parent){ 
if (width === undefined) { 
width = 0; 
} 
if (height === undefined) { 
height = width; 
} 
if (aspectMode === undefined) { 
aspectMode = 0; 
} 
if (parent === undefined) { 
parent = null ; 
} 
this._width = width; 
this._height = height; 
this._parent = parent; 
this.aspectMode = aspectMode; 
this.aspectRatio = (height === 0)? 1: width / height; 
this.minWidth = 0; 
this.minHeight = 0; 
this.maxWidth = Number.MAX_VALUE; 
this.maxHeight = Number.MAX_VALUE; 
this.snapTo = new Vector2(); 
} 
,
setAspectMode: function (value){ 
if (value === undefined) { 
value = 0; 
} 
this.aspectMode = value; 
return this.setSize(this._width, this._height); 
} 
,
setSnap: function (snapWidth, snapHeight){ 
if (snapWidth === undefined) { 
snapWidth = 0; 
} 
if (snapHeight === undefined) { 
snapHeight = snapWidth; 
} 
this.snapTo.set(snapWidth, snapHeight); 
return this.setSize(this._width, this._height); 
} 
,
setParent: function (parent){ 
this._parent = parent; 
return this.setSize(this._width, this._height); 
} 
,
setMin: function (width, height){ 
if (width === undefined) { 
width = 0; 
} 
if (height === undefined) { 
height = width; 
} 
this.minWidth = Clamp(width, 0, this.maxWidth); 
this.minHeight = Clamp(height, 0, this.maxHeight); 
return this.setSize(this._width, this._height); 
} 
,
setMax: function (width, height){ 
if (width === undefined) { 
width = Number.MAX_VALUE; 
} 
if (height === undefined) { 
height = width; 
} 
this.maxWidth = Clamp(width, this.minWidth, Number.MAX_VALUE); 
this.maxHeight = Clamp(height, this.minHeight, Number.MAX_VALUE); 
return this.setSize(this._width, this._height); 
} 
,
setSize: function (width, height){ 
if (width === undefined) { 
width = 0; 
} 
if (height === undefined) { 
height = width; 
} 
switch (this.aspectMode){ 
case Size.NONE: this._width = this.getNewWidth(SnapFloor(width, this.snapTo.x)); 
this._height = this.getNewHeight(SnapFloor(height, this.snapTo.y)); 
this.aspectRatio = (this._height === 0)? 1: this._width / this._height; 
break ; 
case Size.WIDTH_CONTROLS_HEIGHT: this._width = this.getNewWidth(SnapFloor(width, this.snapTo.x)); 
this._height = this.getNewHeight(this._width * (1 / this.aspectRatio), false ); 
break ; 
case Size.HEIGHT_CONTROLS_WIDTH: this._height = this.getNewHeight(SnapFloor(height, this.snapTo.y)); 
this._width = this.getNewWidth(this._height * this.aspectRatio, false ); 
break ; 
case Size.FIT: this.constrain(width, height, true ); 
break ; 
case Size.ENVELOP: this.constrain(width, height, false ); 
break ; 
} 
return this; 
} 
,
setAspectRatio: function (ratio){ 
this.aspectRatio = ratio; 
return this.setSize(this._width, this._height); 
} 
,
resize: function (width, height){ 
this._width = this.getNewWidth(SnapFloor(width, this.snapTo.x)); 
this._height = this.getNewHeight(SnapFloor(height, this.snapTo.y)); 
this.aspectRatio = (this._height === 0)? 1: this._width / this._height; 
return this; 
} 
,
getNewWidth: function (value, checkParent){ 
if (checkParent === undefined) { 
checkParent = true ; 
} 
value = Clamp(value, this.minWidth, this.maxWidth); 
if (checkParent && this._parent && value > this._parent.width) { 
value = Math.max(this.minWidth, this._parent.width); 
} 
return value; 
} 
,
getNewHeight: function (value, checkParent){ 
if (checkParent === undefined) { 
checkParent = true ; 
} 
value = Clamp(value, this.minHeight, this.maxHeight); 
if (checkParent && this._parent && value > this._parent.height) { 
value = Math.max(this.minHeight, this._parent.height); 
} 
return value; 
} 
,
constrain: function (width, height, fit){ 
if (width === undefined) { 
width = 0; 
} 
if (height === undefined) { 
height = width; 
} 
if (fit === undefined) { 
fit = true ; 
} 
width = this.getNewWidth(width); 
height = this.getNewHeight(height); 
var snap = this.snapTo; 
var newRatio = (height === 0)? 1: width / height; 
if ((fit && this.aspectRatio > newRatio) || (!fit && this.aspectRatio < newRatio)) { 
width = SnapFloor(width, snap.x); 
height = width / this.aspectRatio; 
if (snap.y > 0) { 
height = SnapFloor(height, snap.y); 
width = height * this.aspectRatio; 
} 
} 
 else if ((fit && this.aspectRatio < newRatio) || (!fit && this.aspectRatio > newRatio)) { 
height = SnapFloor(height, snap.y); 
width = height * this.aspectRatio; 
if (snap.x > 0) { 
width = SnapFloor(width, snap.x); 
height = width * (1 / this.aspectRatio); 
} 
} 
this._width = width; 
this._height = height; 
return this; 
} 
,
fitTo: function (width, height){ 
return this.constrain(width, height, true ); 
} 
,
envelop: function (width, height){ 
return this.constrain(width, height, false ); 
} 
,
setWidth: function (value){ 
return this.setSize(value, this._height); 
} 
,
setHeight: function (value){ 
return this.setSize(this._width, value); 
} 
,
toString: function (){ 
return '[{ Size (width=' + this._width + ' height=' + this._height + ' aspectRatio=' + this.aspectRatio + ' aspectMode=' + this.aspectMode + ') }]'; 
} 
,
copy: function (destination){ 
destination.setAspectMode(this.aspectMode); 
destination.aspectRatio = this.aspectRatio; 
return destination.setSize(this.width, this.height); 
} 
,
destroy: function (){ 
this._parent = null ; 
this.snapTo = null ; 
} 
,
width: { 
get: function (){ 
return this._width; 
} 
,
set: function (value){ 
this.setSize(value, this._height); 
} 
}
,
height: { 
get: function (){ 
return this._height; 
} 
,
set: function (value){ 
this.setSize(this._width, value); 
} 
}
}
); 
Size.NONE = 0; 
Size.WIDTH_CONTROLS_HEIGHT = 1; 
Size.HEIGHT_CONTROLS_WIDTH = 2; 
Size.FIT = 3; 
Size.ENVELOP = 4; 
module.exports = Size;