import 'package:flutter/foundation.dart';
import '../../database/database.dart';
import '../cloud/account_cloud_cleanup_service.dart';
import 'auth_service.dart';

/// Coordinates destructive account work while preserving device-local rides.
class AccountLifecycleService {
  final AuthService _auth;
  final CloudAccountCleanup _cloud;
  final AppDatabase _db;

  AccountLifecycleService({required this._auth, required this._cloud, required this._db});

  Future<void> deleteAccount({String? password}) async {
    final user = _auth.currentUser;
    if (user == null || user.isAnonymous) throw StateError('A permanent account is required.');
    final uid = user.uid;
    var stage = 'reauth';
    try {
      debugPrint('[DELETE_FLOW] reauth start');
      await _auth.reauthenticate(password: password);
      debugPrint('[DELETE_FLOW] reauth success');
      stage = 'cloud cleanup';
      debugPrint('[DELETE_FLOW] cloud cleanup start');
      await _cloud.deleteCloudData();
      debugPrint('[DELETE_FLOW] cloud cleanup success');
      stage = 'Firebase deletion';
      debugPrint('[DELETE_FLOW] auth delete start');
      await _auth.deleteCurrentUser();
      debugPrint('[DELETE_FLOW] auth delete success');
      stage = 'local ownership cleanup';
      debugPrint('[DELETE_FLOW] local ownership clear start');
      await _db.clearCloudOwnerUid(uid);
      debugPrint('[DELETE_FLOW] local ownership clear success');
    } catch (error, stackTrace) {
      final message = error.toString().replaceAll(
        RegExp(r'Bearer\s+\S+', caseSensitive: false),
        'Bearer [REDACTED]',
      );
      final clippedMessage = message.length > 240
          ? message.substring(0, 240)
          : message;
      final appFrames = stackTrace
          .toString()
          .split('\n')
          .where((line) => line.contains('package:motorcycle_dash/'))
          .take(5)
          .join(' | ');
      debugPrint(
        '[DELETE_FLOW] failure stage=$stage type=${error.runtimeType} '
        'message=$clippedMessage',
      );
      if (appFrames.isNotEmpty) {
        debugPrint('[DELETE_FLOW] failure frames=$appFrames');
      }
      rethrow;
    }
  }
}