var express       = require('express'),
    path          = require('path'),
    favicon       = require('serve-favicon'),
    logger        = require('morgan'),
    cookieParser  = require('cookie-parser'),
    bodyParser    = require('body-parser'),

    routes = require('./routes/index'),
    users = require('./routes/users'),

    app = express(),
    server = require('http').Server(app),
    io = require('socket.io')(server),
    debug = require('debug')('http');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hjs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});



// ===============================================
// IMDb API LOGIC
// ===============================================

var randomMovieRank = Math.floor((Math.random() * 250) + 1);

function dataRequest(){
    // API Key
    key = "4dba72b2-7558-4c0f-bd18-9ffcb0999c4e";
    // Url
    mainUrl = "http://api.myapifilms.com/imdb/top?token="+ key +"&format=json&data=0&start=1&end=250";
    // API Call
    var request = require('request');

    request(mainUrl, function (error, response, body) {
        if (!error && response.statusCode == 200) {

        // Storing data in an object
        var obj         = JSON.parse(body), //JSON Parser
            movieArray  = obj.data.movies, //Creating Array
            item        = movieArray[randomMovieRank]; //Setting random movie variable
            itemArray  = [item.ranking,item.title,item.year];
      }
    });
    return false;
}


// ===============================================
// Functions
// ===============================================

// To update the allUsers array when someone leaves or connects
var serverFunctions = {
    playerOne : null,
    playerTwo : null,
    fullLobby : false,

    updateUsernames: function(){
        io.sockets.emit('usernames', allUsers);
    },
    playerCheck: function()   {
        playerOne = allUsers[0];
        playerTwo = allUsers[1];
    },
    lobbyCheck: function() {
    // Lobby Control  (to deny access to more than two users per lobby)
    // Checking array length to see if game lobby is full
    if(allUsers.length > 2) {
        fullLobby = true;
        console.log("Lobby is now full");
        // If the lobby is full, send the players names who will ve vsing one another
        serverFunctions.playerCheck();
    } else {
        fullLobby = false;
        console.log("Lobby has one slot open");
    }
        io.sockets.emit("full_lobby_check", {lobbyStatus: fullLobby});
    }
};

// ===============================================
// SERVER SIDE LOGIC
// ===============================================

var allUsers = [];

io.sockets.on("connection", function(socket){

    console.log("Client connection, no username");

// ===============================================
// NEW ANSWER LOGIC
// ===============================================
if(itemArray !== null)
{
     io.sockets.emit("serverAnswer", {ranking: itemArray[0], title: itemArray[1], year: itemArray[2]});
}
else{
    //1.ajax request IMDB resource
    //2.set movies variables
    //3.emit message
    dataRequest();
    console.log(itemArray);
    io.sockets.emit("serverAnswer", {ranking: itemArray[0], title: itemArray[1], year: itemArray[2]});
}

// ===============================================
// NEW PLAYER LOGIC
// ===============================================

    // Player has connected
    // Checks if username is already been used
    socket.on("new user", function(data, callback){
      // If it exists return false, else add it to array of allUsers
        if (allUsers.indexOf(data) != -1) {
            callback(false);
        } else {
            callback(true);
            socket.username = data;
            allUsers.push(socket.username);
            // Tells all active users which users are active
            serverFunctions.updateUsernames();
            console.log("Player " + socket.username + " connected");
        }
        // Calls theplayer check in order to push through the player names client side
        serverFunctions.lobbyCheck();
    });

// ===============================================
// DISCONNECTION
// ===============================================
    socket.on('disconnect', function(data) {
        // Allows us to track if a unknown user has disconnected or if a known user has dosconnected
        if(!socket.username) {
            console.log("Client disconnected before username");
        } else {
            console.log("Player " + socket.username + " disconnected");
            serverFunctions.lobbyCheck();
            // Removes only one user
            allUsers.splice(allUsers.indexOf(socket.username), 1);
            }
        // Calls update usernames function
        serverFunctions.updateUsernames();
    });

// ===============================================
// IN GAME CHAT
// ===============================================

    // Broadcasts a message
    socket.on("send message", function(data){
        io.sockets.emit("new message", {msg: data, user: socket.username});
    });

    socket.on("begin_game", function(data, callback){
        serverFunctions.playerCheck();
        io.sockets.emit("event_new_user", {userOne: playerOne,userTwo: playerTwo});
    });

// ===============================================
// Game Start Logic
// ===============================================



    // Will fire off once client has entered lobby
    io.sockets.emit('connected', {connected:'Yay!'});

    // the client passes 'callback' as a function. When we invoke the callback on the server
    // the code on the client side will run
    socket.on('testmessage', function(data, callback){
        console.log('Socket (server-side): received message:', data);
        var responseData = { string1:'I like ', string2: 'bananas ', string3:' dude!' };
        //console.log('connection data:', evData);
        callback(responseData);
    });

});

module.exports = {app: app, server: server};