import type { NextConfig } from "next";
import withPWAInit from "@ducanh2912/next-pwa";

const nextConfig: NextConfig = {
  // No `env` block — NEXT_PUBLIC_ vars are picked up automatically at build time.

  // Next.js blocks dev resources (HMR client, font optimizer, stack frames) for
  // any origin that isn't localhost. When you open the dev server from another
  // device on the LAN, the SSR HTML renders but /_next/hmr is refused, so the
  // page never hydrates and every button/control is inert.
  //
  // Patterns are matched per dot-segment with `*` as a single-segment wildcard
  // (same rules as `images.remotePatterns`) — CIDR ranges do NOT work here.
  // Dev-only; `allowedDevOrigins` has no effect on `next build` / `next start`.
  allowedDevOrigins: ["192.168.0.*", "100.88.155.*", "*.local"],

  // Emits `.next/standalone/server.js` with a trimmed node_modules, so the
  // runtime image doesn't need the full dependency tree. Required by the
  // Dockerfile. Note it does NOT bundle `.next/static` or `public/` — the
  // Dockerfile copies those in separately.
  output: "standalone",

  // pdfjs-dist dynamically imports its own worker module at runtime. When Next bundles
  // it, that import is rewritten to a path inside .next that does not exist in the
  // standalone image, and every parse dies with "Setting up fake worker failed".
  // Keeping it external means it is required from node_modules at runtime and traced
  // into the image, so the worker resolves next to the library that needs it.
  serverExternalPackages: ["pdfjs-dist"],
};

const withPWA = withPWAInit({
  dest: "public",
  // Off in dev. next-pwa writes sw.js + workbox-*.js into `dest` on every
  // compile, and the dev server watches public/ — so leaving it on makes each
  // build trigger the next one, forever. A dev service worker also serves
  // stale assets against HMR. Production builds are unaffected.
  disable: process.env.NODE_ENV === "development",
  cacheOnFrontEndNav: true,
  aggressiveFrontEndNavCaching: true,
  reloadOnOnline: true,
  register: true,
  workboxOptions: { cleanupOutdatedCaches: true, clientsClaim: true, skipWaiting: true },
});

export default withPWA(nextConfig);