import * as fs from 'fs';
import * as path from 'path';
import * as url from 'url';

const __dirname = path.dirname(url.fileURLToPath(import.meta.url));

function getThisCodebaseRootDirPath_rec(dirPath: string): string {
  if (fs.existsSync(path.join(dirPath, 'LICENSE'))) {
    return dirPath;
  }
  return getThisCodebaseRootDirPath_rec(path.join(dirPath, '..'));
}

let result: string | undefined = undefined;

export function getThisCodebaseRootDirPath(): string {
  if (result !== undefined) {
    return result;
  }

  return (result = getThisCodebaseRootDirPath_rec(__dirname));
}

export function getNearestPackageJsonDirPath(dirPath: string): string {
  if (fs.existsSync(path.join(dirPath, 'package.json'))) {
    return dirPath;
  }
  return getNearestPackageJsonDirPath(path.join(dirPath, '..'));
}