let express = require('express');
let app = express();
let server = require('http').createServer(app);
let {Server} = require("socket.io");
let io = new Server(server);

let port = 5000;
server.listen(port, function () {
    generate_log_message("MAIN", "Server", 'RUNNING', "PORT " + port);
});


app.use(express.static(__dirname + '/../public'));


io.on('connection', socket => {
    let addedUser = false;

    socket.on('add user', function (data) {
        socket.username = data.username;
        socket.room = data.room_name;

        addedUser = true;

        socket.emit('login');
        socket.join(socket.room);

        socket.broadcast.to(socket.room).emit('user joined', socket.username);

        generate_log_message(socket.room, socket.username, "JOINED", "");
    });

    socket.on('new message', function (data) {
        socket.broadcast.to(socket.room).emit('new message', {
            username: socket.username,
            message: data
        });

        generate_log_message(socket.room, socket.username, "MESSAGE", data);
    });

    socket.on('disconnect', function () {
        if (addedUser) {
            socket.broadcast.to(socket.room).emit('user left', socket.username);
        }

        generate_log_message(socket.room, socket.username, "LEFT", "");
    });
});

function generate_log_message(room, user, type, message) {
    let color;
    switch (type) {
        case 'LEFT':
            color = '\x1b[31m';
            break;
        case 'JOINED':
            color = '\x1b[32m';
            break;
        case 'MESSAGE':
            color = '\x1b[36m';
            break;
        case 'RUNNING':
            color = '\x1b[35m';
            break;
        default:
            color = '\x1b[0m';
    }
    room = pad(10, room, ' ').substr(0, 10);
    user = pad(10, user, ' ').substr(0, 10);
    type = pad(10, type, ' ').substr(0, 10);

    let reset_color = '\x1b[0m';
    console.info("%s[%s] [%s] [%s]\x1b[0m %s", color, room, user, type, reset_color, message);
}

function pad(width, string, padding) {
    if (string === undefined || string === null) return pad(width, " ", " ");
    return (width <= string.length) ? string : pad(width, string + padding, padding)
}