var serialport = require('serialport'),
		plotly = require('plotly')('Plotly_UserName', 'Plotly_API'),
		token = 'Plotly_Token';
var portName = '/dev/tty.usbmodem1411';
var sp = new serialport.SerialPort(portName, {
	baudRate: 9600,
	dataBits: 8,
	parity: 'none',
	stopBits: 1,
	flowControl: false,
	parser: serialport.parsers.readline("\r\n")
});
	
// helper function to get a nicely formatted date string
function getDateString() {
	var time = new Date().getTime();
	// 32400000 is (GMT+9 Japan)
	// for your timezone just multiply +/-GMT by 36000000
	var datestr = new Date(time + 32400000).toISOString().replace(/T/, ' ').replace(/Z/, '');
	return datestr;
}
	
var initdata = [{x: [], y: [], stream: {token: token, maxpoints: 500}}];
var initlayout = {fileopt: "extend", filename: "ambient-fahrenheit-temperature-sensor"};
	
plotly.plot(initdata, initlayout, function (err, msg) {
	if (err)
		return console.log(err)
	
	console.log(msg);
	var stream = plotly.stream(token, function (err, res) {
		console.log(err, res);
	});
	
	sp.on('data', function (input) {
		if (isNaN(input) || input > 1023)
			return;
	
		var streamObject = JSON.stringify({x: getDateString(), y: input});
		console.log(streamObject);
		stream.write(streamObject + '\n');
	});
});