var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var jsonParser = bodyParser.json();
var urlencodedParser = bodyParser.urlencoded({
    extended: false
});
var gpio = require('rpi-gpio');

gpio.setup(12, gpio.DIR_OUT, function() {});

var accountSid = 'ACCOUNT SID';
var authToken = "AUTH TOKEN";
var client = require('twilio')(accountSid, authToken);

function on() {
    gpio.write(12, true, function(err) {
        if (err) throw err;
        console.log('Written to pin');
    });
}

function off() {
    gpio.write(12, false, function(err) {
        if (err) throw err;
        console.log('Written to pin');
    });
}

app.get('/', function(req, res) {
    res.send('Hello World!');
});

app.post('/', urlencodedParser, function(req, res) {
    console.log(req.body);

    if (req.body.Body.toLowerCase() === 'on') {
        console.log('turning on led');
        on();
        client.messages.create({
            to: req.body.From,
            from: req.body.To,
            body: 'Turning LED on.'
        }, function(err, responseData) {
            if (err) {
                console.log(responseData.from);
                console.log(responseData.body);
            }
        });
    } else if (req.body.Body.toLowerCase() === 'off') {
        console.log('turning off led');
        off();
        client.messages.create({
            to: req.body.From, // Any number Twilio can deliver to
            from: req.body.To, // A number you bought from Twilio and can use for outbound communication
            body: 'Turning LED off.' // body of the SMS message
        }, function(err, responseData) {
            if (!err) {
                console.log(responseData.from);
                console.log(responseData.body);
            }
        });
    }

    var twiml = '<?xml version="1.0" encoding="UTF-8" ?><Response></Response>';

    res.send(twiml, {
        'Content-Type': 'text/xml'
    }, 200);
});

app.listen(3000, function() {
    console.log('Example app listening on port 3000!');
});