const fs = require('fs');
const path = require('path');

// One id per build, shared with the build workers through process.env (they
// inherit it), and written to public/version.json so a running app can ask
// the server which build is live (components/UpdateWatcher).
if (!process.env.NEXT_PUBLIC_BUILD_ID) {
  process.env.NEXT_PUBLIC_BUILD_ID = Date.now().toString(36);
  fs.writeFileSync(
    path.join(__dirname, 'public', 'version.json'),
    JSON.stringify({ id: process.env.NEXT_PUBLIC_BUILD_ID }) + '\n',
  );
}

/** @type {import('next').NextConfig} */
const nextConfig = {
  // Only use static export for production builds
  ...(process.env.NEXT_EXPORT === 'true' ? { output: 'export' } : {}),
  images: {
    unoptimized: true,
  },
  trailingSlash: true,
};

module.exports = nextConfig;