var Class = require('../utils/Class'); 
var List = new Class({ 
initialize: function List(parent){ 
this.parent = parent; 
this.list = [] ; 
this.position = 0; 
} 
,
add: function (child){ 
if (this.getIndex(child) === -1) { 
this.list.push(child); 
} 
return child; 
} 
,
addAt: function (child, index){ 
if (index === undefined) { 
index = 0; 
} 
if ((_AN_Read_length('length', this.list)) === 0) { 
return this.add(child); 
} 
if (index >= 0 && index <= (_AN_Read_length('length', this.list))) { 
if (this.getIndex(child) === -1) { 
this.list.splice(index, 0, child); 
} 
} 
return child; 
} 
,
addMultiple: function (children){ 
if (Array.isArray(children)) { 
for (var i = 0; 
i < (_AN_Read_length('length', children)); i++ ){ 
this.add(children[i]); 
} 
} 
return children; 
} 
,
getAt: function (index){ 
return this.list[index]; 
} 
,
getIndex: function (child){ 
return this.list.indexOf(child); 
} 
,
sort: function (children){ 
if (children === undefined) { 
children = this.list; 
} 
return children.sort(this.sortIndexHandler.bind(this)); 
} 
,
sortIndexHandler: function (childA, childB){ 
var indexA = this.getIndex(childA); 
var indexB = this.getIndex(childB); 
if (indexA < indexB) { 
return -1; 
} 
 else if (indexA > indexB) { 
return 1; 
} 
return 0; 
} 
,
getByKey: function (property, value){ 
for (var i = 0; 
i < (_AN_Read_length('length', this.list)); i++ ){ 
if (this.list[i][property] === value) { 
return this.list[i]; 
} 
} 
return null ; 
} 
,
getByName: function (name){ 
return this.getByKey('name', name); 
} 
,
getRandom: function (startIndex, length){ 
if (startIndex === undefined) { 
startIndex = 0; 
} 
if (length === undefined) { 
length = _AN_Read_length('length', this.list); 
} 
if (length === 0 || length > (_AN_Read_length('length', this.list))) { 
return null ; 
} 
var randomIndex = startIndex + Math.floor(Math.random() * length); 
return this.list[randomIndex]; 
} 
,
getFirst: function (property, value, startIndex, endIndex){ 
if (startIndex === undefined) { 
startIndex = 0; 
} 
if (endIndex === undefined) { 
endIndex = _AN_Read_length('length', this.list); 
} 
for (var i = startIndex; 
i < endIndex; i++ ){ 
var child = this.list[i]; 
if (child[property] === value) { 
return child; 
} 
} 
return null ; 
} 
,
getAll: function (property, value, startIndex, endIndex){ 
if (startIndex === undefined) { 
startIndex = 0; 
} 
if (endIndex === undefined) { 
endIndex = _AN_Read_length('length', this.list); 
} 
var output = [] ; 
for (var i = startIndex; 
i < endIndex; i++ ){ 
var child = this.list[i]; 
if (property) { 
if (child[property] === value) { 
output.push(child); 
} 
} 
 else { 
output.push(child); 
} 
} 
return output; 
} 
,
count: function (property, value){ 
var total = 0; 
for (var i = 0; 
i < (_AN_Read_length('length', this.list)); i++ ){ 
var child = this.list[i]; 
if (child[property] === value) { 
total++ ; 
} 
} 
return total; 
} 
,
swap: function (child1, child2){ 
if (child1 === child2) { 
return ; 
} 
var index1 = this.getIndex(child1); 
var index2 = this.getIndex(child2); 
if (index1 < 0 || index2 < 0) { 
throw new Error('List.swap: Supplied objects must be children of the same list')
} 
this.list[index1] = child2; 
this.list[index2] = child1; 
} 
,
moveTo: function (child, index){ 
var currentIndex = this.getIndex(child); 
if (currentIndex === -1 || index < 0 || index >= (_AN_Read_length('length', this.list))) { 
throw new Error('List.moveTo: The supplied index is out of bounds')
} 
this.list.splice(currentIndex, 1); 
this.list.splice(index, 0, child); 
return child; 
} 
,
remove: function (child){ 
var index = this.list.indexOf(child); 
if (index !== -1) { 
this.list.splice(index, 1); 
} 
return child; 
} 
,
removeAt: function (index){ 
var child = this.list[index]; 
if (child) { 
this.children.splice(index, 1); 
} 
return child; 
} 
,
removeBetween: function (beginIndex, endIndex){ 
if (beginIndex === undefined) { 
beginIndex = 0; 
} 
if (endIndex === undefined) { 
endIndex = _AN_Read_length('length', this.list); 
} 
var range = endIndex - beginIndex; 
if (range > 0 && range <= endIndex) { 
var removed = this.list.splice(beginIndex, range); 
return removed; 
} 
 else if (range === 0 && (_AN_Read_length('length', this.list)) === 0) { 
return [] ; 
} 
 else { 
throw new Error('List.removeBetween: Range Error, numeric values are outside the acceptable range')
} 
} 
,
removeAll: function (){ 
var i = _AN_Read_length('length', this.list); 
while (i-- ){ 
this.remove(this.list[i]); 
} 
return this; 
} 
,
shutdown: function (){ 
this.removeAll(); 
} 
,
bringToTop: function (child){ 
if (this.getIndex(child) < (_AN_Read_length('length', this.list))) { 
this.remove(child); 
this.add(child); 
} 
return child; 
} 
,
sendToBack: function (child){ 
if (this.getIndex(child) > 0) { 
this.remove(child); 
this.addAt(child, 0); 
} 
return child; 
} 
,
moveUp: function (child){ 
var a = this.getIndex(child); 
if (a !== -1 && a < (_AN_Read_length('length', this.list)) - 1) { 
var b = this.getAt(a + 1); 
if (b) { 
this.swap(child, b); 
} 
} 
return child; 
} 
,
moveDown: function (child){ 
var a = this.getIndex(child); 
if (a > 0) { 
var b = this.getAt(a - 1); 
if (b) { 
this.swap(child, b); 
} 
} 
return child; 
} 
,
reverse: function (){ 
this.list.reverse(); 
return this; 
} 
,
shuffle: function (){ 
for (var i = _AN_Read_length('length', this.list) - 1; 
i > 0; i-- ){ 
var j = Math.floor(Math.random() * (i + 1)); 
var temp = this.list[i]; 
this.list[i] = this.list[j]; 
this.list[j] = temp; 
} 
return this; 
} 
,
replace: function (oldChild, newChild){ 
var index = this.getIndex(oldChild); 
if (index !== -1) { 
this.remove(oldChild); 
this.addAt(newChild, index); 
return oldChild; 
} 
} 
,
exists: function (child){ 
return (this.list.indexOf(child) > -1); 
} 
,
setAll: function (key, value){ 
for (var i = 0; 
i < (_AN_Read_length('length', this.list)); i++ ){ 
if (this.list[i]) { 
this.list[i][key] = value; 
} 
} 
} 
,
each: function (callback, thisArg){ 
var args = [null ] ; 
for (var i = 1; 
i < (_AN_Read_length('length', arguments)); i++ ){ 
args.push(arguments[i]); 
} 
for (i = 0; i < (_AN_Read_length('length', this.list)); i++ ){ 
args[0] = this.list[i]; 
callback.apply(thisArg, args); 
} 
} 
,
length: { 
get: function (){ 
return (_AN_Read_length('length', this.list)); 
} 
}
,
first: { 
get: function (){ 
this.position = 0; 
if ((_AN_Read_length('length', this.list)) > 0) { 
return this.list[0]; 
} 
 else { 
return null ; 
} 
} 
}
,
last: { 
get: function (){ 
if ((_AN_Read_length('length', this.list)) > 0) { 
this.position = _AN_Read_length('length', this.list) - 1; 
return this.list[this.position]; 
} 
 else { 
return null ; 
} 
} 
}
,
next: { 
get: function (){ 
if (this.position < (_AN_Read_length('length', this.list))) { 
this.position++ ; 
return this.list[this.position]; 
} 
 else { 
return null ; 
} 
} 
}
,
previous: { 
get: function (){ 
if (this.position > 0) { 
this.position-- ; 
return this.list[this.position]; 
} 
 else { 
return null ; 
} 
} 
}
}
); 
module.exports = List;