import { readFileSync } from 'node:fs';

/** Read the installed package version so the CLI output cannot drift from package.json. */
export function getCliVersion(): string {
  const packageJsonUrl = new URL('../package.json', import.meta.url);
  const packageJson: unknown = JSON.parse(readFileSync(packageJsonUrl, 'utf8'));

  if (
    typeof packageJson === 'object' &&
    packageJson !== null &&
    'version' in packageJson &&
    typeof packageJson.version === 'string'
  ) {
    return packageJson.version;
  }

  throw new Error('Unable to determine CLI version from package.json');
}