const express = require('express');
const path = require('path');
const http = require('http');
const { Server } = require('socket.io');

const app = express();
const server = http.createServer(app);
const io = new Server(server);

const PORT = process.env.PORT || 3000;

let waitingPlayer = null;

// Sert tous les fichiers du dossier "client"
app.use(express.static(path.join(__dirname, "..", "client")));

io.on("connection", (socket) => {
  console.log("Un client s'est connecte : ${socket.id}");

  if (waitingPlayer === null){
    waitingPlayer = socket;
    socket.emit("status", "En attente d'un second joueur...");
  } else {
    const partner = waitingPlayer;
    waitingPlayer = null;

    const socketIsGuide = Math.random() < 0.5;
    socket.emit("role", socketIsGuide ? "guide" : "explorateur");
    partner.emit("role", socketIsGuide ? "explorateur" : "guide");

    socket.data.partnerId = partner.id;
    partner.data.partnerId = socket.id;

    socket.emit("status", "Partie prete !");
    partner.emit("status", "Partie prete !");
  }

  socket.on("message", (data) => {
    const partnerId = socket.data.partnerId;
    if (partnerId){
      io.to(partnerId).emit("message", data);
    }
  });

  socket.on("disconnect", () => {
    console.log("Client deconnecte : ${socket.id}");
    if (waitingPlayer === socket){
      waitingPlayer = null;
    }
  });
});

server.listen(PORT, () => {
  console.log(`Serveur démarré sur http://localhost:${PORT}`);
});