/**
 * Post-build: make ./out a complete, uploadable cPanel document root.
 *  - copy deploy/htaccess.root → out/.htaccess
 *  - copy config/campuses.json → out/api/config/campuses.json (read by PHP)
 *  - ensure the private lib/cron folders keep their .htaccess deny rules
 *  - write out/BUILD.txt with the build id
 */
import { promises as fs } from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const OUT = path.join(ROOT, "out");

async function exists(p) {
  try {
    await fs.access(p);
    return true;
  } catch {
    return false;
  }
}

async function main() {
  if (!(await exists(OUT))) throw new Error("out/ not found — run `next build` first");

  await fs.copyFile(path.join(ROOT, "deploy/htaccess.root"), path.join(OUT, ".htaccess"));

  await fs.mkdir(path.join(OUT, "api/config"), { recursive: true });
  await fs.copyFile(path.join(ROOT, "config/campuses.json"), path.join(OUT, "api/config/campuses.json"));
  await fs.writeFile(path.join(OUT, "api/config/.htaccess"), "Require all denied\n");

  for (const dir of ["api/lib", "api/cron"]) {
    const ht = path.join(OUT, dir, ".htaccess");
    if (!(await exists(ht))) await fs.writeFile(ht, "Require all denied\n");
  }

  // Next writes 404.html for the not-found route; make sure it exists for ErrorDocument
  if (!(await exists(path.join(OUT, "404.html")))) {
    console.warn("warning: out/404.html missing — custom 404 will not work");
  }

  const pkg = JSON.parse(await fs.readFile(path.join(ROOT, "package.json"), "utf8"));
  await fs.writeFile(path.join(OUT, "BUILD.txt"), `${pkg.name} ${pkg.version}\nbuilt ${new Date().toISOString()}\n`);

  // Report
  let files = 0;
  let bytes = 0;
  async function walk(d) {
    for (const e of await fs.readdir(d, { withFileTypes: true })) {
      const p = path.join(d, e.name);
      if (e.isDirectory()) await walk(p);
      else {
        files++;
        bytes += (await fs.stat(p)).size;
      }
    }
  }
  await walk(OUT);
  console.log(`postbuild: out/ ready — ${files} files, ${(bytes / 1024 / 1024).toFixed(1)} MB`);
}

main().catch((e) => {
  console.error(e);
  process.exit(1);
});