/* Echo sms service */
new MSG(sms).sendSMS();

/* 
	LIST OF SMS FORMAT
		* Vote for a team
			KEYWORD[ ]VOTE_FOR
		* Obtain the result
			KEYWORD
 */
var mongoose = require('mongodb'),
	texto = sms.msgdata.split(' '),
	match = "",
	msg = new MSG(sms),
	team = ["a","b","c","d"];
/* check the syntax */
if(!(match = sms.msgdata.match(/^[a-z0-9]+([ ]+([abcd]))?$/i))){
	msg.sendSMS("For Vote send : "+texto[0].toUpperCase()+" YOUR CHOICE\nPossible choice are :"+(team.join(', ').toUpperCase()));
}else{
	sms.msgdata = new Buffer(sms.msgdata).toString();
	// connect to vote database
	var db = mongoose('mongodb://localhost/'+texto[0]);

	db.on('error',function(){
		msg.sendSMS('Error when vote retry later!');
	});
	db.once('open',function(){
		/* create vote schema */
		var Vote = db.model('votes',{
			phone_number : String,
			voted_for : String
		});
		switch(typeof match[2]){
			case 'string': // it's a vote
				new Vote({
					phone_number : new Buffer(sms.sender).toString(),
					voted_for : match[2].toUpperCase()
				}).save(function(err){
					db.close(); // !important you must close connection
					msg.sendSMS(err ? 'Error when vote retry!' : 'Votre registred vote again for your team...');
				});
				break;
			default : //obtain the result
				var result = {};
				team.map(function(e){ result[e.toUpperCase()] = 0; });
				Vote.find({},function(err,res){
					db.close();// !important you must close connection
					res.map(function(e){ result[e.voted_for] += 1; });
					res = [];
					for(var i in result) res.push({_id:i,value : result[i]});
					var ret = [];
					res.sort(function(a,b){ return a.value < b.value}).map(function(a){ ret.push("  "+a._id+" : "+a.value);  })
					msg.sendSMS("Vote result : "+ret.join(", "));
				})
		}
	})
}