import 'dart:io';

void main(List<String> args) {
  if (args.isEmpty) {
    print('Usage: dart run tool/bump_version.dart <patch|minor|major|build>');
    exit(1);
  }

  final action = args[0].toLowerCase();
  final pubspecFile = File('pubspec.yaml');
  if (!pubspecFile.existsSync()) {
    print('Error: pubspec.yaml not found.');
    exit(1);
  }

  final pubspecContent = pubspecFile.readAsStringSync();
  final versionRegex = RegExp(r'^version:\s*([0-9]+)\.([0-9]+)\.([0-9]+)\+([0-9]+)', multiLine: true);
  final match = versionRegex.firstMatch(pubspecContent);

  if (match == null) {
    print('Error: could not find version pattern in pubspec.yaml');
    exit(1);
  }

  int major = int.parse(match.group(1)!);
  int minor = int.parse(match.group(2)!);
  int patch = int.parse(match.group(3)!);
  int build = int.parse(match.group(4)!);

  switch (action) {
    case 'major':
      major++;
      minor = 0;
      patch = 0;
      build++;
      break;
    case 'minor':
      minor++;
      patch = 0;
      build++;
      break;
    case 'patch':
      patch++;
      build++;
      break;
    case 'build':
      build++;
      break;
    default:
      print('Unknown action "$action". Use patch, minor, major, or build.');
      exit(1);
  }

  final newVersion = '$major.$minor.$patch+$build';
  print('Bumping version to: $newVersion');

  final updatedPubspec = pubspecContent.replaceFirst(versionRegex, 'version: $newVersion');
  pubspecFile.writeAsStringSync(updatedPubspec);

  final appInfoFile = File('lib/core/app_info.dart');
  if (appInfoFile.existsSync()) {
    final appInfoContent = appInfoFile.readAsStringSync();
    final appInfoRegex = RegExp(r"static const String fallbackVersion = '([^']+)';");
    final updatedAppInfo = appInfoContent.replaceFirst(appInfoRegex, "static const String fallbackVersion = '$newVersion';");
    appInfoFile.writeAsStringSync(updatedAppInfo);
  }

  print('Successfully updated pubspec.yaml and lib/core/app_info.dart to $newVersion');
}