/*
---

name: Core

description: The heart of MooTools.

license: MIT-style license.

copyright: Copyright (c) 2006-2010 [Valerio Proietti](http://mad4milk.net/).

authors: The MooTools production team (http://mootools.net/developers/)

inspiration:
  - Class implementation inspired by [Base.js](http://dean.edwards.name/weblog/2006/03/base/) Copyright (c) 2006 Dean Edwards, [GNU Lesser General Public License](http://opensource.org/licenses/lgpl-license.php)
  - Some functionality inspired by [Prototype.js](http://prototypejs.org) Copyright (c) 2005-2007 Sam Stephenson, [MIT License](http://opensource.org/licenses/mit-license.php)

provides: [Core, MooTools, Type, typeOf, instanceOf, Native]

...
*/

(function(){

this.MooTools = {
	version: '1.3',
	build: 'a3eed692dd85050d80168ec2c708efe901bb7db3'
};

// typeOf, instanceOf

var typeOf = this.typeOf = function(item){
	if (item == null) return 'null';
	if (item.$family) return item.$family();

	if (item.nodeName){
		if (item.nodeType == 1) return 'element';
		if (item.nodeType == 3) return (/\S/).test(item.nodeValue) ? 'textnode' : 'whitespace';
	} else if (typeof item.length == 'number'){
		if (item.callee) return 'arguments';
		if ('item' in item) return 'collection';
	}

	return typeof item;
};

var instanceOf = this.instanceOf = function(item, object){
	if (item == null) return false;
	var constructor = item.$constructor || item.constructor;
	while (constructor){
		if (constructor === object) return true;
		constructor = constructor.parent;
	}
	return item instanceof object;
};

// Function overloading

var Function = this.Function;

var enumerables = true;
for (var i in {toString: 1}) enumerables = null;
if (enumerables) enumerables = ['hasOwnProperty', 'valueOf', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'constructor'];

Function.prototype.overloadSetter = function(usePlural){
	var self = this;
	return function(a, b){
		if (a == null) return this;
		if (usePlural || typeof a != 'string'){
			for (var k in a) self.call(this, k, a[k]);
			if (enumerables) for (var i = enumerables.length; i--;){
				k = enumerables[i];
				if (a.hasOwnProperty(k)) self.call(this, k, a[k]);
			}
		} else {
			self.call(this, a, b);
		}
		return this;
	};
};

Function.prototype.overloadGetter = function(usePlural){
	var self = this;
	return function(a){
		var args, result;
		if (usePlural || typeof a != 'string') args = a;
		else if (arguments.length > 1) args = arguments;
		if (args){
			result = {};
			for (var i = 0; i < args.length; i++) result[args[i]] = self.call(this, args[i]);
		} else {
			result = self.call(this, a);
		}
		return result;
	};
};

Function.prototype.extend = function(key, value){
	this[key] = value;
}.overloadSetter();

Function.prototype.implement = function(key, value){
	this.prototype[key] = value;
}.overloadSetter();

// From

var slice = Array.prototype.slice;

Function.from = function(item){
	return (typeOf(item) == 'function') ? item : function(){
		return item;
	};
};

Array.from = function(item){
	if (item == null) return [];
	return (Type.isEnumerable(item) && typeof item != 'string') ? (typeOf(item) == 'array') ? item : slice.call(item) : [item];
};

Number.from = function(item){
	var number = parseFloat(item);
	return isFinite(number) ? number : null;
};

String.from = function(item){
	return item + '';
};

// hide, protect

Function.implement({

	hide: function(){
		this.$hidden = true;
		return this;
	},

	protect: function(){
		this.$protected = true;
		return this;
	}

});

// Type

var Type = this.Type = function(name, object){
	if (name){
		var lower = name.toLowerCase();
		var typeCheck = function(item){
			return (typeOf(item) == lower);
		};

		Type['is' + name] = typeCheck;
		if (object != null){
			object.prototype.$family = (function(){
				return lower;
			}).hide();
			//<1.2compat>
			object.type = typeCheck;
			//</1.2compat>
		}
	}

	if (object == null) return null;

	object.extend(this);
	object.$constructor = Type;
	object.prototype.$constructor = object;

	return object;
};

var toString = Object.prototype.toString;

Type.isEnumerable = function(item){
	return (item != null && typeof item.length == 'number' && toString.call(item) != '[object Function]' );
};

var hooks = {};

var hooksOf = function(object){
	var type = typeOf(object.prototype);
	return hooks[type] || (hooks[type] = []);
};

var implement = function(name, method){
	if (method && method.$hidden) return this;

	var hooks = hooksOf(this);

	for (var i = 0; i < hooks.length; i++){
		var hook = hooks[i];
		if (typeOf(hook) == 'type') implement.call(hook, name, method);
		else hook.call(this, name, method);
	}
	
	var previous = this.prototype[name];
	if (previous == null || !previous.$protected) this.prototype[name] = method;

	if (this[name] == null && typeOf(method) == 'function') extend.call(this, name, function(item){
		return method.apply(item, slice.call(arguments, 1));
	});

	return this;
};

var extend = function(name, method){
	if (method && method.$hidden) return this;
	var previous = this[name];
	if (previous == null || !previous.$protected) this[name] = method;
	return this;
};

Type.implement({

	implement: implement.overloadSetter(),

	extend: extend.overloadSetter(),

	alias: function(name, existing){
		implement.call(this, name, this.prototype[existing]);
	}.overloadSetter(),

	mirror: function(hook){
		hooksOf(this).push(hook);
		return this;
	}

});

new Type('Type', Type);

// Default Types

var force = function(name, object, methods){
	var isType = (object != Object),
		prototype = object.prototype;

	if (isType) object = new Type(name, object);

	for (var i = 0, l = methods.length; i < l; i++){
		var key = methods[i],
			generic = object[key],
			proto = prototype[key];

		if (generic) generic.protect();

		if (isType && proto){
			delete prototype[key];
			prototype[key] = proto.protect();
		}
	}

	if (isType) object.implement(prototype);

	return force;
};

force('String', String, [
	'charAt', 'charCodeAt', 'concat', 'indexOf', 'lastIndexOf', 'match', 'quote', 'replace', 'search',
	'slice', 'split', 'substr', 'substring', 'toLowerCase', 'toUpperCase'
])('Array', Array, [
	'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift', 'concat', 'join', 'slice',
	'indexOf', 'lastIndexOf', 'filter', 'forEach', 'every', 'map', 'some', 'reduce', 'reduceRight'
])('Number', Number, [
	'toExponential', 'toFixed', 'toLocaleString', 'toPrecision'
])('Function', Function, [
	'apply', 'call', 'bind'
])('RegExp', RegExp, [
	'exec', 'test'
])('Object', Object, [
	'create', 'defineProperty', 'defineProperties', 'keys',
	'getPrototypeOf', 'getOwnPropertyDescriptor', 'getOwnPropertyNames',
	'preventExtensions', 'isExtensible', 'seal', 'isSealed', 'freeze', 'isFrozen'
])('Date', Date, ['now']);

Object.extend = extend.overloadSetter();

Date.extend('now', function(){
	return +(new Date);
});

new Type('Boolean', Boolean);

// fixes NaN returning as Number

Number.prototype.$family = function(){
	return isFinite(this) ? 'number' : 'null';
}.hide();

// Number.random

Number.extend('random', function(min, max){
	return Math.floor(Math.random() * (max - min + 1) + min);
});

// forEach, each

Object.extend('forEach', function(object, fn, bind){
	for (var key in object){
		if (object.hasOwnProperty(key)) fn.call(bind, object[key], key, object);
	}
});

Object.each = Object.forEach;

Array.implement({

	forEach: function(fn, bind){
		for (var i = 0, l = this.length; i < l; i++){
			if (i in this) fn.call(bind, this[i], i, this);
		}
	},

	each: function(fn, bind){
		Array.forEach(this, fn, bind);
		return this;
	}

});

// Array & Object cloning, Object merging and appending

var cloneOf = function(item){
	switch (typeOf(item)){
		case 'array': return item.clone();
		case 'object': return Object.clone(item);
		default: return item;
	}
};

Array.implement('clone', function(){
	var i = this.length, clone = new Array(i);
	while (i--) clone[i] = cloneOf(this[i]);
	return clone;
});

var mergeOne = function(source, key, current){
	switch (typeOf(current)){
		case 'object':
			if (typeOf(source[key]) == 'object') Object.merge(source[key], current);
			else source[key] = Object.clone(current);
		break;
		case 'array': source[key] = current.clone(); break;
		default: source[key] = current;
	}
	return source;
};

Object.extend({

	merge: function(source, k, v){
		if (typeOf(k) == 'string') return mergeOne(source, k, v);
		for (var i = 1, l = arguments.length; i < l; i++){
			var object = arguments[i];
			for (var key in object) mergeOne(source, key, object[key]);
		}
		return source;
	},

	clone: function(object){
		var clone = {};
		for (var key in object) clone[key] = cloneOf(object[key]);
		return clone;
	},

	append: function(original){
		for (var i = 1, l = arguments.length; i < l; i++){
			var extended = arguments[i] || {};
			for (var key in extended) original[key] = extended[key];
		}
		return original;
	}

});

// Object-less types

['Object', 'WhiteSpace', 'TextNode', 'Collection', 'Arguments'].each(function(name){
	new Type(name);
});

// Unique ID

var UID = Date.now();

String.extend('uniqueID', function(){
	return (UID++).toString(36);
});

//<1.2compat>

var Hash = this.Hash = new Type('Hash', function(object){
	if (typeOf(object) == 'hash') object = Object.clone(object.getClean());
	for (var key in object) this[key] = object[key];
	return this;
});

Hash.implement({

	forEach: function(fn, bind){
		Object.forEach(this, fn, bind);
	},

	getClean: function(){
		var clean = {};
		for (var key in this){
			if (this.hasOwnProperty(key)) clean[key] = this[key];
		}
		return clean;
	},

	getLength: function(){
		var length = 0;
		for (var key in this){
			if (this.hasOwnProperty(key)) length++;
		}
		return length;
	}

});

Hash.alias('each', 'forEach');

Object.type = Type.isObject;

var Native = this.Native = function(properties){
	return new Type(properties.name, properties.initialize);
};

Native.type = Type.type;

Native.implement = function(objects, methods){
	for (var i = 0; i < objects.length; i++) objects[i].implement(methods);
	return Native;
};

var arrayType = Array.type;
Array.type = function(item){
	return instanceOf(item, Array) || arrayType(item);
};

this.$A = function(item){
	return Array.from(item).slice();
};

this.$arguments = function(i){
	return function(){
		return arguments[i];
	};
};

this.$chk = function(obj){
	return !!(obj || obj === 0);
};

this.$clear = function(timer){
	clearTimeout(timer);
	clearInterval(timer);
	return null;
};

this.$defined = function(obj){
	return (obj != null);
};

this.$each = function(iterable, fn, bind){
	var type = typeOf(iterable);
	((type == 'arguments' || type == 'collection' || type == 'array' || type == 'elements') ? Array : Object).each(iterable, fn, bind);
};

this.$empty = function(){};

this.$extend = function(original, extended){
	return Object.append(original, extended);
};

this.$H = function(object){
	return new Hash(object);
};

this.$merge = function(){
	var args = Array.slice(arguments);
	args.unshift({});
	return Object.merge.apply(null, args);
};

this.$lambda = Function.from;
this.$mixin = Object.merge;
this.$random = Number.random;
this.$splat = Array.from;
this.$time = Date.now;

this.$type = function(object){
	var type = typeOf(object);
	if (type == 'elements') return 'array';
	return (type == 'null') ? false : type;
};

this.$unlink = function(object){
	switch (typeOf(object)){
		case 'object': return Object.clone(object);
		case 'array': return Array.clone(object);
		case 'hash': return new Hash(object);
		default: return object;
	}
};

//</1.2compat>

})();