const path=require('path');

const http=require('http');

const express=require('express');

const socketio=require('socket.io');

const formatMessage = require('./utils/messages');

const {userJoin, getCurrentUser, getRoomUsers, userLeave}=require('./utils/users');

const app=express();

const server=http.createServer(app);

const io=socketio(server);

const botName='ChatCord Bot';

// set static folder

app.use(express.static(path.join(__dirname,'public')));

// Run when a client connects

io.on('connection', socket =>{

socket.on('joinRoom', ({username, room})=>{

const user=userJoin(socket.id, username, room);

socket.join(user.room);

// welcome current user

socket.emit('message', formatMessage(botName,'Welcome to ChatCord'));

// Broadcast when user joins the chat

socket.broadcast.to(user.room).emit('message', formatMessage(botName, `${user.username} has joined the chat`));

// Send users and room info

io.to(user.room).emit('roomUsers',{

room : user.room,

users: getRoomUsers(user.room)

});

})

// Listen for chatMessage

socket.on('chatMessage', msg=>{

const user=getCurrentUser(socket.id);

io.to(user.room).emit('message',formatMessage(user.username, msg));

});

// Runs when client disconnects

socket.on('disconnect',() => {

const user= userLeave(socket.id);

if(user){

io.to(user.room).emit('message',formatMessage(botName,`${user.username} has left the chat`));

// Send users and room info

io.to(user.room).emit('roomUsers',{

room : user.room,

users: getRoomUsers(user.room)

});

}

});

});

const PORT= 3000 | process.env.PORT;

server.listen(PORT, ()=> console.log(`Server running on port ${PORT}`));