import type { NextConfig } from "next";
import { networkInterfaces } from "os";

// Next.js 16's dev server blocks cross-origin access to dev-only resources
// (the HMR websocket, etc.) unless the origin is allowlisted - which silently
// breaks hydration when testing from a real phone over WiFi, since the phone's
// origin is the dev machine's LAN IP, never "localhost". Derived dynamically
// because DHCP can hand out a different IP on a later session. Only affects
// `next dev`. Copied from nachklang-feedback.
const lanIps = Object.values(networkInterfaces())
  .flat()
  .filter((iface): iface is NonNullable<typeof iface> => !!iface && iface.family === "IPv4" && !iface.internal)
  .map((iface) => iface.address);

const nextConfig: NextConfig = {
  // Self-contained server.js for Plesk's Passenger Node.js toolkit, the same
  // way nachklang-feedback is deployed.
  output: "standalone",
  allowedDevOrigins: lanIps,
  turbopack: {
    root: __dirname,
  },
};

export default nextConfig;