var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);
var SC = require('soundcloud-nodejs-api-wrapper');

/***********************************************************************************************************************
 * Start the server
 **********************************************************************************************************************/
server.listen(process.env.PORT || 5000);

app.get('/', function (req, res) {
    res.sendFile(__dirname + '/index.html');
});

/***********************************************************************************************************************
 * Init soundcloud wrapper and login to my account
 **********************************************************************************************************************/
//Stuffs to store song data into
var index = 0;
var currentSong = 0;
var song = {
    title: [],
    artist: [],
    id: [],
    duration: [],
    url: []
};

//TOP SECRT PLS NO STEAL
var credentials = {
    client_id : 'ID',
    client_secret : 'SECRET',
    username : 'amedeekirk@yahoo.com',
    password : 'PASSWORD'
};

//provide the api with top secrt stuffs (pls no steal)
var sc = new SC(credentials);
var client = sc.client();

//Where the magic happens...
client.exchange_token(function(err, result) {
    //Get the access token
    var access_token = arguments[3].access_token;
    console.log('Full API auth response was:');
    console.log(arguments);

    //Creates a new client object using access token we got
    var clientnew = sc.client({access_token : access_token});

    //feed the client object my playlist and store info on each song in the list
    clientnew.get('/playlists/326613197', null, function(err, result) {
        if (err) console.error(err);

        result.tracks.forEach(function (track) {
            song.id[index] = track.id;
            song.title[index] = track.title;
            song.artist[index] = track.user.username;
            song.duration[index] = track.duration;
            song.url[index] = track.permalink_url;
            index++;
        });

        newSong();

        //Choose next random track & send info to all clients
        function newSong() {
            currentSong = Math.floor(Math.random() * (song.id.length + 1));
            var startTime = Date.now();
            //Emits to all connected clients
            socket.broadcast.emit(currentSongDetails(startTime))
        }

        //Current song id and timestamp for client
        function currentSongDetails(startTime) {
            var songInfo = '{' +
                '"title":' + song.title[currentSong] + ',' +
                '"artist":' + song.artist[currentSong] +',' +
                '"id":' + song.id[currentSong] +',' +
                '"timeElapsed":' + timeElapsed(startTime) +',' +
                '"url":' + song.url[currentSong] +
                '}';
            console.log(songInfo);
            return songInfoObj = JSON.parse(songInfo);
        }

        //Gets the time elapsed since the start of the song
        function timeElapsed(startTime) {
             return Date.now() - startTime;
        }
    });
});

/***********************************************************************************************************************
 * Init Socket.io connections
 **********************************************************************************************************************/
//Run when user connects
io.on('connection', function (socket) {
    console.log("User Connected");
    socket.emit('initPosition', currentSongDetails());
    socket.on('confirmed', function (data) {
        console.log(data);
    });

    //Lets us know when a user disconnects
    socket.on('disconnect', function () {
        io.emit('user disconnected');
        console.log("User disconnected")
    });

});