import { pathToFileURL } from 'node:url';
import { openReadOnlyStore } from './db.mjs';

export async function createBackup(args, env = process.env) {
  if (args.length !== 2 || args[0] !== '--output') throw new Error('Invalid arguments');
  const store = openReadOnlyStore(env.DB_PATH);
  try { await store.backup(args[1]); }
  finally { store.close(); }
}

if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  createBackup(process.argv.slice(2)).then(() => { process.stdout.write('{"ok":true}\n'); }).catch(() => {
    process.stderr.write('Backup failed; check existing DB_PATH and a new absolute private --output path\n');
    process.exitCode = 1;
  });
}