var Class = require('../utils/Class'); 
var ObjectPool = require('../gameobjects/pool/ObjectPool'); 
var SpritePool = require('../gameobjects/pool/SpritePool'); 
var PoolManager = new Class({ 
initialize: function PoolManager(state){ 
this.state = state; 
this._active = [] ; 
this._pendingInsertion = [] ; 
this._pendingRemoval = [] ; 
this.processing = false ; 
} 
,
add: function (pool){ 
if (this.processing) { 
this._pendingInsertion.push(pool); 
} 
 else { 
this._active.push(pool); 
} 
return this; 
} 
,
createSpritePool: function (maxSize, key, frame){ 
var pool = new SpritePool(this, maxSize, key, frame); 
this.add(pool); 
return pool; 
} 
,
createObjectPool: function (classType, maxSize){ 
if (maxSize === undefined) { 
maxSize = -1; 
} 
var pool = new ObjectPool(this, classType, maxSize); 
this.add(pool); 
return pool; 
} 
,
begin: function (){ 
var toRemove = _AN_Read_length('length', this._pendingRemoval); 
var toInsert = _AN_Read_length('length', this._pendingInsertion); 
if (toRemove === 0 && toInsert === 0) { 
return ; 
} 
var i; 
var pool; 
for (i = 0; i < toRemove; i++ ){ 
pool = this._pendingRemoval[i]; 
var index = this._active.indexOf(pool); 
if (index > -1) { 
this._active.splice(index, 1); 
} 
pool.destroy(); 
} 
this._active = this._active.concat(this._pendingInsertion.splice(0)); 
this._pendingRemoval.length = 0; 
this._pendingInsertion.length = 0; 
} 
,
update: function (time, delta){ 
this.processing = true ; 
for (var i = 0; 
i < (_AN_Read_length('length', this._active)); i++ ){ 
var pool = this._active[i]; 
pool.update.call(pool, time, delta); 
} 
this.processing = false ; 
} 
,
shutdown: function (){ 
var i; 
for (i = 0; i < (_AN_Read_length('length', this._pendingInsertion)); i++ ){ 
this._pendingInsertion[i].destroy(); 
} 
for (i = 0; i < (_AN_Read_length('length', this._active)); i++ ){ 
this._active[i].destroy(); 
} 
for (i = 0; i < (_AN_Read_length('length', this._pendingRemoval)); i++ ){ 
this._pendingRemoval[i].destroy(); 
} 
this._active.length = 0; 
this._pendingRemoval.length = 0; 
this._pendingInsertion.length = 0; 
} 
,
destroy: function (){ 
this.shutdown(); 
this.state = undefined; 
} 
}
); 
module.exports = PoolManager;