import express from "express";
import cors from "cors";
import { createServer } from "http";
import { Server } from "socket.io";

const app = express();
app.use(cors());
app.use(express.json());

// Create HTTP + Socket.io server
const server = createServer(app);
const io = new Server(server, {
  cors: {
    origin: "*",
  },
});

app.get("/", (req, res) => {
  res.send("Duel of Minds backend is live!");
});

// --- SOCKET LOGIC ---
io.on("connection", (socket) => {
  console.log("⚡ New player connected:", socket.id);

  socket.on("createRoom", () => {
    const roomCode = Math.random().toString(36).substring(2, 7).toUpperCase();
    socket.join(roomCode);
    socket.emit("roomCreated", { roomCode });
    console.log(`🎮 Room created: ${roomCode}`);
  });

  socket.on("joinRoom", (roomCode) => {
    const room = io.sockets.adapter.rooms.get(roomCode);
    if (room) {
      socket.join(roomCode);
      socket.emit("roomJoined", { success: true });
      io.to(roomCode).emit("playerJoined", socket.id);
      console.log(`👥 Player ${socket.id} joined room ${roomCode}`);
    } else {
      socket.emit("roomJoined", { success: false, message: "Room not found" });
    }
  });

  socket.on("disconnect", () => {
    console.log("❌ Player disconnected:", socket.id);
  });
});

// Start server
const PORT = process.env.PORT || 3000;
server.listen(PORT, () => console.log(`⚡ Server running on port ${PORT}`));