(function() {
	
	msnbc.namespace('msnbc.misc');
	
	
	msnbc.misc.URLCommand = Class.extend({
		
		init: function(m, c, args){
			this.module = m;
			this.command = c || 'generic';
			this.args = args || [];
		},
		
		toURLString: function(){
			
			var s = "sp-" + this.module;
			s+= (this.command=='generic')?'':'-'+this.command;
			if (this.args.length) {
				s += '/';
				for (var i=0; i < this.args.length; i++) {
					var arg = this.args[i];
					for (var n in arg)  {
						if (n=='id' && this.args.length==1) {
							s+= arg[n];
							continue;
						}
						if (i>0) s+='-';
						s += n + '-' + arg[n];
					};
				};
			}
			
			return s;
			
		},
		
		toShareString: function(){
			// share slash link when on msnbc domain,
			// this is a workaround for when working off local files
			var sep = (window.location.host.match(/msnbc/))?'/':'#';
			var url = msnbc.document.pristineURL || window.location.toString();
			url = url.replace(/#.*$/, '');
			url = url.replace(/\/$/, '');
			return url + sep + this.toURLString();
		}
		
	});

	
	msnbc.misc.URLManager = msnbc.core.EventDispatcher.extend({
		
		init: function(){
			this._super();
			this.commands = [];
			this.currCommands = [];
			this.patt = /sp(-\w{1,2})+(\/(\d+|(?!sp)[\w\d]+(-[\w\d]+)+))?/g;
			this.getCommands(window.location.toString());
		},
		
		
		getCommands: function(url){
			var self = this;
			// split on '/' to get commands with arguments
			// split arguments on '-'
			url = url.replace(/#.*$/, '');
			// then parse arguments, matched to command. ignore invalid
			var mt = url.match(this.patt);
			msnbc.log("command match = "+ mt);	

			if (!mt) return (msnbc.log("[URLManager] no commands matched"));
			jQuery.each(mt, function(i) {
				var m;
				var c;
				var args = [];
				var str = this;
				var ca = str.split('/');
				var cmd = ca[0].split('-');
				m = cmd[1];
				c = cmd[2];
				if (ca.length>1) {
					var parts = ca[1].split("-");
					if (parts.length==1) {
						args.push( {id:parts[0]} );
					} else if (parts.length%2==0) {
						for (var j=0; j < parts.length; j+=2) {
							var o = {};
							o[parts[j]] = parts[j+1];
							args.push( o );
						}
					} else {
						msnbc.warn("[URLManager] invalid pattern: "+str);
					}
				}
				self.commands.push(new msnbc.misc.URLCommand(m, c, args));
			});
			
			msnbc.log(this.commands);
			
			msnbc.document.pristineURL = url.replace(/[\/#]+?sp-.*$/g, "");
			msnbc.log('pristine url: '+msnbc.document.pristineURL);
			
			
		},
		
		updateLocation: function(command){
			// need to check for duplicates
			
			// get rid of the existing commands matching the new command's module
			///this.currCommands = jQuery.grep(this.currCommands, function(n,i){
			///	return n.module != command.module;
			///});
			/// OR
			this.currCommands = [];
			///
			this.currCommands.unshift(command);
			
			window.location.hash = '#'+this.commandsToString(this.currCommands);
			
		},
		
		commandsToString: function(arrayOfCommands){
			arrayOfCommands = arrayOfCommands || this.commands;
			var s ='';
			var commands= arrayOfCommands.length;
			for (var i=0; i < commands; i++) {
				s += arrayOfCommands[i].toURLString();
				if (i<commands-1) s+= '/';
			};
			
			return s;
			
		}
		
		
		
	});
	
	
	

})();