// Copies the production build (app/dist) into the repository root, so the
// webserver can serve the repo checkout directly as static files — no
// server-side build step, no special MIME-type config, no reverse proxy
// required. Run automatically as part of `npm run build`.
//
//   node scripts/deploy.mjs
//
import { readdir, rm, cp, unlink, copyFile } from "node:fs/promises";
import { dirname, join, resolve } from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = dirname(fileURLToPath(import.meta.url));
const DIST = resolve(__dirname, "../dist");
const REPO_ROOT = resolve(__dirname, "../../");

const entries = await readdir(DIST, { withFileTypes: true });

for (const entry of entries) {
  const src = join(DIST, entry.name);
  const dest = join(REPO_ROOT, entry.name);

  if (entry.isDirectory()) {
    // Directories (assets/, icons/) are pure build output — wipe and replace
    // so stale, superseded hashed filenames don't pile up.
    await rm(dest, { recursive: true, force: true });
    await cp(src, dest, { recursive: true });
    console.log(`  dir   ${entry.name}/`);
    continue;
  }

  // Hashed, content-addressed files (e.g. workbox-<hash>.js) change name
  // between builds — remove any previous versions before copying the new one.
  const hashedPrefixMatch = entry.name.match(/^(workbox-)[0-9a-f]+(\.js)$/);
  if (hashedPrefixMatch) {
    const [, prefix, ext] = hashedPrefixMatch;
    const siblings = await readdir(REPO_ROOT);
    for (const sibling of siblings) {
      if (sibling.startsWith(prefix) && sibling.endsWith(ext) && sibling !== entry.name) {
        await unlink(join(REPO_ROOT, sibling));
      }
    }
  }

  await copyFile(src, dest);
  console.log(`  file  ${entry.name}`);
}

console.log(`\nDeployed build output from ${DIST} -> ${REPO_ROOT}`);