var psStore = (function(){
	function NewStore(){ return new Store; }

	function Store(){
		var data = {};

		this.Get = Get;
		this.Put = Put;
		this.Delete = Delete; 
		
		this.Sub = Sub;
		this.Unsub = Unsub;

		this.Exit = Exit;

		function Get(key){
			var d = data[key]
			if(isDefined(d)){
				return d.get();
			} 

			return null;
		}

		function Put(key, value){
			var d = data[key];
			if(!isDefined(d)){
				d = data[key] = new StoreItem;
			}

			d.data = isObject(value) || isArray(value) ? copy(value) : value;
			pub(key);

			return true;
		}

		function Delete(key){
			return Put(key, null);
		}

		function Sub(key, fn){
			var d = data[key];
			if(!isDefined(d)){
				d = data[key] = new StoreItem;
			}

			if(isFunction(fn)){
				return d.subscribers.Set(fn);
			}
			
			return null;
		}

		function Unsub(key, fnKey){
			var d = data[key];
			if(isDefined(d)){
				d.subscribers.Delete(fnKey);
			}
			
			return null;
		}

		function Exit(){
			data = null;
		}

		function pub(key){
			var d = data[key]
			if(isDefined(d)){
				d.subscribers.ForEach(p);
			}

			return true

			function p(k, v){ v(d.get()); }
		}
	}

	function StoreItem(){		
		this.data = null;
		this.subscribers = new Subscribers;
	}

	StoreItem.prototype.get = function(){
		var d = this.data;
		if(isObject(d) || isArray(d)){
			return copy(d);
		} else {
			return d;
		}
	}

	function Subscribers(){
		var list = {},
			indx = 0;

		this.Set = function(fn){
			var key = indx.toString();
			indx++;
			list[key] = fn;
			return key;
		};

		this.Delete = function(key){
			delete list[key];
			return null;
		};

		this.ForEach = function(fn){
			loop(list, fn);
			return null
		};
	}

	function copy(d){ return JSON.parse(JSON.stringify(d)); }

	function isDefined(v){ return v !== null && v !== undefined; }
	function isFunction(fn) { return !!fn && typeof fn === "function"; }
	function isObject(t){ return t instanceof Object && t.constructor === Object; }
	function isArray(t){ return Array.isArray(t); }

	return NewStore;
})();

/*
if(!!define){
	define(function(){
		return psStore;
	});
}
*/