const http = require('http');
const express = require('express');
const socketio = require('socket.io');
const readline = require('readline');

const game = require('./game'); // this imports the RpsGame class from the rps-game.js file

const app = express();
const clientPath = `${__dirname}/../client`;
console.log(`Serving static from ${clientPath}`);
app.use(express.static(clientPath));
const server = http.createServer(app);
const io = socketio(server);

var roomno = 1;
players = [];

io.on('connection', (sock) => {

    sock.on('disconnect', function(data) {
        sock.leave(players.roomNumber);
        players.splice(players.indexOf(sock.username), 1);
        connections.splice(connections.indexOf(sock), 1);
        console.log('Disconnected: %s sockets connected', players.length);
        updateUsernames();
        checkGameBtn();
    });

    // new user
    sock.on('new user', function(data) {
        sock.username = data;

        //Increase roomno when 2 clients are present in a room.
        if(io.nsps['/'].adapter.rooms["room"+roomno] && io.nsps['/'].adapter.rooms["room"+roomno].length >= 8) {
            roomno++;
        }
        sock.join("room"+roomno);
        sock.roomNumber = "room"+roomno;

        players.push( {playerId: sock.id, username: sock.username, roomNumber: sock.roomNumber, score: 6} );
        //var allConnectedClients = Object.keys(io.sockets.connected); // returns ids of all connected users
        //var clientsCount = io.engine.clientsCount ; // This will return the count of connected clients

        console.log('Connected: %s sockets connected', players.length);
        updateUsernames(players);
        checkGameBtn();
        //Send this event to everyone in the room.
        io.sockets.in("room"+roomno).emit('connectToRoom', "You are in room no. "+roomno);
    });

    function updateUsernames() {
        for (var i=0; i<players.length;i++) {
            var roomPlayers = players.filter(function(roomPlayer) {
                return roomPlayer.roomNumber === players[i].roomNumber;
            });
            io.sockets.in(players[i].roomNumber).emit('get users', roomPlayers);
        }
    }

    function checkGameBtn() {
        for (var i=0; i<players.length;i++) {
            var numOfPlayers = players.filter(function(numPlayer) {
                return numPlayer.roomNumber === players[i].roomNumber;
            });
            io.sockets.in(players[i].roomNumber).emit('startGameBtn', numOfPlayers);
        }
    }

    sock.on('message', (text) => {
        io.emit('message', text);
    });
});

server.on('error', (err) => {
    console.error('Server error: ', err);
});

server.listen(3333, () => {
    console.log('RPS started on 3333');
});