const express = require("express");
const socketIO = require("socket.io");

const service = require("./service.js");
const state = require("./state.js");

const PORT = 3001;

const app = express();
const server = app.listen(PORT, () => console.log(`Example app listening on port ${PORT}!`));
const io = socketIO(server);

app.get('/', (req, res) => res.send('<pre>' + JSON.stringify(state) + '</pre>'));

io.on('connection', socket => {
    const socketId = socket.id;

    console.log('a user connected', socketId);

    const lobby = service.joinLobby(socketId);
    socket.join(lobby.name);
    socket.emit('welcome', {lobby: lobby.name});


    socket.on('disconnect', (reason) => {
        console.log('Disconnected:', socketId);
        service.leaveLobby(socketId);
    });

    socket.on('join_lobby', (lobbyId, callback) => {
        console.log(`${socketId} wants to join '${lobbyId}'.`);

        // Leave current lobby first
        service.leaveLobby(socketId);
        const lobby = service.joinLobby(socketId, lobbyId);

        socket.join(lobby.name);

        callback(null, {
            status: 'ok',
            lobby: lobby.name
        });
    });
});