var Class = require('../../utils/Class'); 
var GetValue = require('../../utils/object/GetValue'); 
var SmoothedKeyControl = new Class({ 
initialize: function SmoothedKeyControl(config){ 
this.camera = GetValue(config, 'camera', null ); 
this.left = GetValue(config, 'left', null ); 
this.right = GetValue(config, 'right', null ); 
this.up = GetValue(config, 'up', null ); 
this.down = GetValue(config, 'down', null ); 
this.zoomIn = GetValue(config, 'zoomIn', null ); 
this.zoomOut = GetValue(config, 'zoomOut', null ); 
this.zoomSpeed = GetValue(config, 'zoomSpeed', 0.01); 
var accel = GetValue(config, 'acceleration', null ); 
if (typeof accel === 'number') { 
this.accelX = accel; 
this.accelY = accel; 
} 
 else { 
this.accelX = GetValue(config, 'acceleration.x', 0); 
this.accelY = GetValue(config, 'acceleration.y', 0); 
} 
var drag = GetValue(config, 'drag', null ); 
if (typeof drag === 'number') { 
this.dragX = drag; 
this.dragY = drag; 
} 
 else { 
this.dragX = GetValue(config, 'drag.x', 0); 
this.dragY = GetValue(config, 'drag.y', 0); 
} 
var maxSpeed = GetValue(config, 'maxSpeed', null ); 
if (typeof maxSpeed === 'number') { 
this.maxSpeedX = maxSpeed; 
this.maxSpeedY = maxSpeed; 
} 
 else { 
this.maxSpeedX = GetValue(config, 'maxSpeed.x', 0); 
this.maxSpeedY = GetValue(config, 'maxSpeed.y', 0); 
} 
this._speedX = 0; 
this._speedY = 0; 
this._zoom = 0; 
this.active = (this.camera !== null ); 
} 
,
start: function (){ 
this.active = (this.camera !== null ); 
return this; 
} 
,
stop: function (){ 
this.active = false ; 
return this; 
} 
,
setCamera: function (camera){ 
this.camera = camera; 
return this; 
} 
,
update: function (delta){ 
if (!this.active) { 
return ; 
} 
if (delta === undefined) { 
delta = 1; 
} 
var cam = this.camera; 
if (this._speedX > 0) { 
this._speedX -= this.dragX * delta; 
if (this._speedX < 0) { 
this._speedX = 0; 
} 
} 
 else if (this._speedX < 0) { 
this._speedX += this.dragX * delta; 
if (this._speedX > 0) { 
this._speedX = 0; 
} 
} 
if (this._speedY > 0) { 
this._speedY -= this.dragY * delta; 
if (this._speedY < 0) { 
this._speedY = 0; 
} 
} 
 else if (this._speedY < 0) { 
this._speedY += this.dragY * delta; 
if (this._speedY > 0) { 
this._speedY = 0; 
} 
} 
if (this.up && this.up.isDown) { 
this._speedY += this.accelY; 
if (this._speedY > this.maxSpeedY) { 
this._speedY = this.maxSpeedY; 
} 
} 
 else if (this.down && this.down.isDown) { 
this._speedY -= this.accelY; 
if (this._speedY < - this.maxSpeedY) { 
this._speedY = - this.maxSpeedY; 
} 
} 
if (this.left && this.left.isDown) { 
this._speedX += this.accelX; 
if (this._speedX > this.maxSpeedX) { 
this._speedX = this.maxSpeedX; 
} 
} 
 else if (this.right && this.right.isDown) { 
this._speedX -= this.accelX; 
if (this._speedX < - this.maxSpeedX) { 
this._speedX = - this.maxSpeedX; 
} 
} 
if (this.zoomIn && this.zoomIn.isDown) { 
this._zoom = - this.zoomSpeed; 
} 
 else if (this.zoomOut && this.zoomOut.isDown) { 
this._zoom = this.zoomSpeed; 
} 
 else { 
this._zoom = 0; 
} 
if (this._speedX !== 0) { 
cam.scrollX -= ((this._speedX * delta) | 0); 
} 
if (this._speedY !== 0) { 
cam.scrollY -= ((this._speedY * delta) | 0); 
} 
if (this._zoom !== 0) { 
cam.zoom += this._zoom; 
if (cam.zoom < 0.1) { 
cam.zoom = 0.1; 
} 
} 
} 
,
destroy: function (){ 
this.camera = null ; 
this.left = null ; 
this.right = null ; 
this.up = null ; 
this.down = null ; 
this.zoomIn = null ; 
this.zoomOut = null ; 
} 
}
); 
module.exports = SmoothedKeyControl;