import fs from 'fs';
import path from 'path';
import { fileURLToPath, pathToFileURL } from 'url';

function normalizeCliEntryPath(filePath, realpath = fs.realpathSync) {
  if (typeof filePath !== 'string' || filePath.trim().length === 0) {
    return null;
  }

  const resolvedPath = path.resolve(filePath);
  try {
    return realpath(resolvedPath);
  } catch {
    return resolvedPath;
  }
}

function isModuleCliExecution(entryPath = process.argv[1], moduleUrl = import.meta.url, realpath = fs.realpathSync) {
  if (typeof entryPath !== 'string' || entryPath.trim().length === 0) {
    return false;
  }

  try {
    const normalizedEntryPath = normalizeCliEntryPath(entryPath, realpath);
    const normalizedModulePath = normalizeCliEntryPath(fileURLToPath(moduleUrl), realpath);
    if (!normalizedEntryPath || !normalizedModulePath) {
      return false;
    }
    return pathToFileURL(normalizedEntryPath).href === pathToFileURL(normalizedModulePath).href;
  } catch {
    return false;
  }
}

export {
  normalizeCliEntryPath,
  isModuleCliExecution,
};