Velar/Frontend/lib/login.dart

// // ignore_for_file: use_build_context_synchronously

// import 'package:flutter/material.dart';
// import 'package:google_sign_in/google_sign_in.dart';
// import 'package:http/http.dart' as http;
// import 'package:monarch/email.dart';
// import 'package:monarch/other_pages/enviroment.dart';
// import 'dart:convert';
// import 'package:shared_preferences/shared_preferences.dart';
// import 'package:monarch/main_pages/HomePage/homepage.dart';

// class LoginScreen extends StatefulWidget {
//   const LoginScreen({super.key});

//   @override
//   State<LoginScreen> createState() => _LoginScreenState();
// }

// class _LoginScreenState extends State<LoginScreen> {
//   // GoogleSignIn instance
//   final GoogleSignIn _googleSignIn = GoogleSignIn(
//     scopes: ['email', 'profile', 'openid'],
//     serverClientId: '${Environment.serverClientId}',
//   );

//   bool _isLoading = false;

//   Future<void> _handleGoogleSignIn() async {
//     setState(() => _isLoading = true);

//     try {
//       // Step 1: Trigger the sign-in flow
//       final GoogleSignInAccount? account = await _googleSignIn.signIn();

//       if (account == null) {
//         // User cancelled
//         setState(() => _isLoading = false);
//         return;
//       }

//       // Step 2: Get authentication tokens
//       final GoogleSignInAuthentication auth = await account.authentication;
//       final String? idToken = auth.idToken;

//       if (idToken == null) {
//         debugPrint("❌ Failed to get ID token");
//         return;
//       }

//       // Step 3: Send token to backend
//       final uri = Uri.parse("http://192.168.1.10:3000/auth/google/token");
//       final res = await http.post(
//         uri,
//         headers: {"Content-Type": "application/json"},
//         body: jsonEncode({"idToken": idToken}),
//       );

//       if (res.statusCode == 200) {
//         final data = jsonDecode(res.body);
//         if (data['success'] == true) {
//           debugPrint("✅ User logged in: ${data['user']}");
//           final prefs = await SharedPreferences.getInstance();
//           prefs.setString('userId', data['user']['_id']);
//           Navigator.pushReplacement(
//             context,
//             MaterialPageRoute(builder: (_) => const EmailsScreen(accessToken: '', userId: 'userId',)),
//           );
//         } else {
//           debugPrint("❌ Login failed: ${data['error']}");
//         }
//       } else {
//         debugPrint("❌ Backend error: ${res.body}");
//       }
//     } catch (e) {
//       debugPrint("⚠ Google Sign-In error: $e");
//     } finally {
//       setState(() => _isLoading = false);
//     }
//   }

//   @override
//   Widget build(BuildContext context) {
//     return Scaffold(
//       backgroundColor: Colors.white,
//       body: Center(
//         child:
//             _isLoading
//                 ? const CircularProgressIndicator()
//                 : ElevatedButton.icon(
//                   style: ElevatedButton.styleFrom(
//                     backgroundColor: Colors.white,
//                     foregroundColor: Colors.black,
//                     padding: const EdgeInsets.symmetric(
//                       vertical: 12,
//                       horizontal: 20,
//                     ),
//                     shape: RoundedRectangleBorder(
//                       borderRadius: BorderRadius.circular(30),
//                       side: const BorderSide(color: Colors.grey),
//                     ),
//                   ),

//                   label: const Text(
//                     'Sign in with Google',
//                     style: TextStyle(fontSize: 16),
//                   ),
//                   onPressed: _handleGoogleSignIn,
//                 ),
//       ),
//     );
//   }
// }
// ignore_for_file: use_build_context_synchronously

import 'package:flutter/material.dart';
import 'package:google_sign_in/google_sign_in.dart';
import 'package:http/http.dart' as http;
import 'package:monarch/email.dart';
import 'package:monarch/other_pages/enviroment.dart';
import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';

class LoginScreen extends StatefulWidget {
  const LoginScreen({super.key});

  @override
  State<LoginScreen> createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  final GoogleSignIn _googleSignIn = GoogleSignIn(
    scopes: [
      'email',
      'profile',
      'openid',
      'https://www.googleapis.com/auth/gmail.readonly'
    ],
    serverClientId: Environment.serverClientId,
  );

  bool _isLoading = false;

  Future<void> _handleGoogleSignIn() async {
    setState(() => _isLoading = true);

    try {
      final GoogleSignInAccount? account = await _googleSignIn.signIn();

      if (account == null) {
        setState(() => _isLoading = false);
        return;
      }

      final GoogleSignInAuthentication auth = await account.authentication;

      final String? idToken = auth.idToken;
      final String? accessToken = auth.accessToken;

      if (idToken == null || accessToken == null) {
        debugPrint("❌ Failed to get tokens");
        return;
      }

      // Send idToken to backend for login
      final uri = Uri.parse("http://192.168.1.10:3000/auth/google/token");
      final res = await http.post(
        uri,
        headers: {"Content-Type": "application/json"},
        body: jsonEncode({"idToken": idToken}),
      );

      if (res.statusCode == 200) {
        final data = jsonDecode(res.body);
        if (data['success'] == true) {
          final prefs = await SharedPreferences.getInstance();
          prefs.setString('userId', data['user']['_id']);
          prefs.setString('accessToken', accessToken);

          // Navigate directly to EmailsScreen with accessToken
          Navigator.pushReplacement(
            context,
            MaterialPageRoute(
              builder: (_) => EmailsScreen(
                accessToken: accessToken,
                userId: data['user']['_id'],
              ),
            ),
          );
        } else {
          debugPrint("❌ Login failed: ${data['error']}");
        }
      } else {
        debugPrint("❌ Backend error: ${res.body}");
      }
    } catch (e) {
      debugPrint("⚠ Google Sign-In error: $e");
    } finally {
      setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: Center(
        child: _isLoading
            ? const CircularProgressIndicator()
            : ElevatedButton.icon(
                style: ElevatedButton.styleFrom(
                  backgroundColor: Colors.white,
                  foregroundColor: Colors.black,
                  padding: const EdgeInsets.symmetric(
                    vertical: 12,
                    horizontal: 20,
                  ),
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(30),
                    side: const BorderSide(color: Colors.grey),
                  ),
                ),
                label: const Text(
                  'Sign in with Google',
                  style: TextStyle(fontSize: 16),
                ),
                onPressed: _handleGoogleSignIn,
              ),
      ),
    );
  }
}