import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/foundation.dart';
import 'package:mobile_monitoring/data/models/service_result.dart';

/// Service untuk Grafik Page - Backend Logic
class GraphService {
  final FirebaseAuth _auth = FirebaseAuth.instance;

  ServiceResult<String?> getCurrentUserIdResult() {
    final uid = _auth.currentUser?.uid;
    debugPrint('[GraphService] getCurrentUserIdResult()');
    debugPrint('  Current user email: ${_auth.currentUser?.email}');
    debugPrint('  Retrieved UID: "$uid"');
    if (uid == null || uid.isEmpty) {
      return ServiceResult.failure(
        message: 'User tidak terautentikasi',
        errorCode: 'unauthenticated',
      );
    }
    return ServiceResult.success(
      message: 'User ID berhasil diambil',
      data: uid,
    );
  }

  /// Get current user
  User? getCurrentUser() {
    return _auth.currentUser;
  }

  /// Validate user authentication
  bool isUserAuthenticated() {
    final user = _auth.currentUser;
    final isAuth = user != null && user.uid.isNotEmpty;
    debugPrint('[GraphService] isUserAuthenticated: $isAuth');
    return isAuth;
  }

  /// Check if user ID is valid
  bool isValidUserId(String? userId) {
    final isValid = userId != null && userId.isNotEmpty;
    debugPrint('[GraphService] isValidUserId("$userId"): $isValid');
    return isValid;
  }
}