import path from "node:path";
import type { NextConfig } from "next";

// The API's internal address. The browser never calls it directly: /api is rewritten to it, so the API's session
// cookies are first-party on the website's origin. Rewrites are fixed when the app is built, so API_URL must be set
// at build time as well as at run time (server components call it directly).
const apiURL = process.env.API_URL ?? "http://localhost:4101";

// The monorepo's root: standalone output traces workspace packages from here.
const root = path.join(import.meta.dirname, "../..");

const config: NextConfig = {
  output: "standalone",
  outputFileTracingRoot: root,
  turbopack: { root },
  // Next's gzip holds back the API's event stream (who's online); compress in front of the app instead (Vercel and
  // most reverse proxies do).
  compress: false,
  agentRules: false,
  async rewrites() {
    return [{ source: "/api/:path*", destination: `${apiURL}/api/:path*` }];
  },
};

export default config;