/**
 * Copies the pdf.js worker into /public so the browser can load it as a plain
 * asset. Running pdf.js on the main thread is not supported, and bundler asset
 * handling for workers differs between webpack and Turbopack, so an explicit
 * copy is the most predictable option.
 *
 * Wired to `predev` and `prebuild` in package.json.
 */
import { copyFileSync, existsSync, mkdirSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const candidates = [
  "pdfjs-dist/build/pdf.worker.min.mjs",
  "pdfjs-dist/build/pdf.worker.mjs",
];

const destination = join(root, "public", "pdf.worker.min.mjs");
mkdirSync(join(root, "public"), { recursive: true });

for (const candidate of candidates) {
  const source = join(root, "node_modules", candidate);
  if (existsSync(source)) {
    copyFileSync(source, destination);
    console.log(`[freezmo] copied ${candidate} -> public/pdf.worker.min.mjs`);
    process.exit(0);
  }
}

console.error("[freezmo] could not find the pdf.js worker — run `npm install` first");
process.exit(1);