// Initialise tracing FIRST so auto-instrumentation can patch http/etc.
require("./tracing");

const http = require("http");
const next = require("next");
const { Server } = require("socket.io");
const { parse } = require("url");

const dev = process.env.NODE_ENV !== "production";
const hostname = "0.0.0.0";
const port = parseInt(process.env.PORT || "3000", 10);

const app = next({ dev, hostname, port });
const handle = app.getRequestHandler();

app.prepare().then(() => {
  const server = http.createServer((req, res) => {
    try {
      const parsedUrl = parse(req.url, true);
      handle(req, res, parsedUrl);
    } catch (err) {
      console.error("Error handling request:", err);
      res.statusCode = 500;
      res.end("internal error");
    }
  });

  const io = new Server(server, {
    cors: { origin: true, credentials: true },
    path: "/socket.io",
    transports: ["websocket", "polling"],
  });

  // Register socket handlers (compiled JS at runtime via require)
  const { registerHandlers } = require("./server/socket-handlers.js");
  registerHandlers(io);

  server.listen(port, hostname, () => {
    console.log(`Server ready on :${port}`);
  });

  process.on("SIGINT", () => {
    server.close(() => process.exit(0));
  });
});