var tcp = require('tcp');
var sys = require('sys');

var SMTPClient = function(options){
	this.options = options || this.defaultOptions();
};
SMTPClient.prototype = {
	defaultOptions: function() {
		return {
			from:"",
			subject:""
		}
	},
	sendmail:function (to, body){
		var promise = new process.Promise();
		var self = this;

		this.connection = tcp.createConnection(25);
		this.connection.addListener("connect", function (socket) {
			self.connection.send("helo localhost\r\n");
			self.connection.send("mail from: " + self.options.from + "\r\n");
			self.connection.send("rcpt to: " + to + "\r\n");
			self.connection.send("data\r\n");
			self.connection.send("From: " + self.options.from + "\r\n");
			self.connection.send("To: " + to + "\r\n");
			self.connection.send("Subject: " + self.options.subject + "\r\n");
			self.connection.send("Content-Type: text/html\r\n");
			self.connection.send(self.wordwrap(body) + "\r\n");
			self.connection.send(".\r\n");
			self.connection.send("quit\r\n");
			self.connection.close();
		});

		this.connection.addListener("receive", function (data) {
			if(self.parseResponse(data)){
				promise.emitSuccess("Email sent!");
				sys.puts("SUCC");
			}else{
				promise.emitError("EMAIL ERROR");
				sys.puts("ERR");
			}
			sys.puts(data);
		});
	},
	parseResponse:function(data){
		var d = data.split("\r\n");
		d.forEach(function(itm){
			if(itm.indexOf("250 OK id=") != -1){
				return true;
			}
		});
		return false;
	},
	wordwrap:function(str){
		var m = 80;
		var b = "\r\n";
		var c = false;
		var i, j, l, s, r;
		str += '';
		if (m < 1) {
			return str;
		}
		for (i = -1, l = (r = str.split(/\r\n|\n|\r/)).length; ++i < l; r[i] += s) {
			for(s = r[i], r[i] = ""; s.length > m; r[i] += s.slice(0, j) + ((s = s.slice(j)).length ? b : "")){
				j = c == 2 || (j = s.slice(0, m + 1).match(/\S*(\s)?$/))[1] ? m : j.input.length - j[0].length || c == 1 && m || j.input.length + (j = s.slice(m).match(/^\S*/)).input.length;
			}
		}
		return r.join("\n");
	}
}

exports.SMTPClient = SMTPClient;