var Class = require('../../utils/Class'); 
var Light = require('./Light'); 
var Utils = require('../../renderer/webgl/Utils'); 
var LightsManager = new Class({ 
initialize: function LightsManager(){ 
this.lightPool = [] ; 
this.lights = [] ; 
this.culledLights = [] ; 
this.ambientColor = { 
r: 0.1,
g: 0.1,
b: 0.1}
; 
this.active = false ; 
this.maxLights = -1; 
} 
,
enable: function (){ 
if (this.maxLights === -1) { 
this.maxLights = this.scene.sys.game.renderer.config.maxLights; 
} 
this.active = true ; 
return this; 
} 
,
disable: function (){ 
this.active = false ; 
return this; 
} 
,
cull: function (camera){ 
var lights = this.lights; 
var culledLights = this.culledLights; 
var length = _AN_Read_length('length', lights); 
var cameraCenterX = camera.x + camera.width / 2; 
var cameraCenterY = camera.y + camera.height / 2; 
var cameraRadius = (camera.width + camera.height) / 2; 
var point = { 
x: 0,
y: 0}
; 
var cameraMatrix = camera.matrix; 
var viewportHeight = this.systems.game.renderer.height; 
culledLights.length = 0; 
for (var i = 0; 
i < length && (_AN_Read_length('length', culledLights)) < this.maxLights; i++ ){ 
var light = lights[i]; 
cameraMatrix.transformPoint(light.x, light.y, point); 
var dx = cameraCenterX - (point.x - (camera.scrollX * light.scrollFactorX * camera.zoom)); 
var dy = cameraCenterY - (viewportHeight - (point.y - (camera.scrollY * light.scrollFactorY) * camera.zoom)); 
var distance = Math.sqrt(dx * dx + dy * dy); 
if (distance < light.radius + cameraRadius) { 
culledLights.push(lights[i]); 
} 
} 
return culledLights; 
} 
,
forEachLight: function (callback){ 
if (!callback) { 
return ; 
} 
var lights = this.lights; 
var length = _AN_Read_length('length', lights); 
for (var i = 0; 
i < length; i++ ){ 
callback(lights[i]); 
} 
return this; 
} 
,
setAmbientColor: function (rgb){ 
var color = Utils.getFloatsFromUintRGB(rgb); 
this.ambientColor.r = color[0]; 
this.ambientColor.g = color[1]; 
this.ambientColor.b = color[2]; 
return this; 
} 
,
getMaxVisibleLights: function (){ 
return 10; 
} 
,
getLightCount: function (){ 
return (_AN_Read_length('length', this.lights)); 
} 
,
addLight: function (x, y, radius, rgb, intensity){ 
if (x === undefined) { 
x = 0; 
} 
if (y === undefined) { 
y = 0; 
} 
if (radius === undefined) { 
radius = 100; 
} 
if (rgb === undefined) { 
rgb = 16777215; 
} 
if (intensity === undefined) { 
intensity = 1; 
} 
var color = null ; 
var light = null ; 
color = Utils.getFloatsFromUintRGB(rgb); 
light = null ; 
var pool = this.lightPool; 
if ((_AN_Read_length('length', pool)) > 0) { 
light = pool.pop(); 
light.set(x, y, radius, color[0], color[1], color[2], intensity); 
} 
 else { 
light = new Light(x, y, radius, color[0], color[1], color[2], intensity); 
} 
this.lights.push(light); 
return light; 
} 
,
removeLight: function (light){ 
var index = this.lights.indexOf(light); 
if (index >= 0) { 
this.lightPool.push(light); 
this.lights.splice(index, 1); 
} 
return this; 
} 
,
shutdown: function (){ 
while ((_AN_Read_length('length', this.lights)) > 0){ 
this.lightPool.push(this.lights.pop()); 
} 
this.ambientColor = { 
r: 0.1,
g: 0.1,
b: 0.1}
; 
this.culledLights.length = 0; 
this.lights.length = 0; 
} 
,
destroy: function (){ 
this.shutdown(); 
this.lightPool.length = 0; 
} 
}
); 
module.exports = LightsManager;