/**
 * The MaxwellCohen/react CSB tarball omits react-server jsx-runtime and
 * compiler-runtime CJS builds that Waku/Vite need. Copy vendored shims into
 * the installed react package after every install.
 */
import { copyFileSync, existsSync, mkdirSync, readdirSync } from 'node:fs';
import { createRequire } from 'node:module';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const require = createRequire(import.meta.url);
const here = dirname(fileURLToPath(import.meta.url));
const shimDir = join(here, 'react-fork-shims', 'cjs');

const reactRoot = dirname(require.resolve('react/package.json'));
const targetDir = join(reactRoot, 'cjs');

mkdirSync(targetDir, { recursive: true });

const files = readdirSync(shimDir).filter((name) => name.endsWith('.js'));
let copied = 0;

for (const name of files) {
  const dest = join(targetDir, name);
  if (existsSync(dest)) continue;
  copyFileSync(join(shimDir, name), dest);
  copied += 1;
}

if (copied > 0) {
  console.log(`[patch-react-fork] added ${copied} missing file(s) under ${targetDir}`);
}