Auth

android/app/build.gradle.kts

@@ -47,4 +47,5 @@ java {
     toolchain {
         languageVersion.set(JavaLanguageVersion.of(17))
     }
-}
+}
+apply(plugin = "com.google.gms.google-services")

android/app/google-services.json

@@ -0,0 +1,30 @@
+{
+  "project_info": {
+    "project_number": "835298460246",
+    "firebase_url": "https://vector-7729b-default-rtdb.asia-southeast1.firebasedatabase.app",
+    "project_id": "vector-7729b",
+    "storage_bucket": "vector-7729b.firebasestorage.app"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:835298460246:android:6d4a4f9da1b2a5a69ab1f7",
+        "android_client_info": {
+          "package_name": "com.example.vector"
+        }
+      },
+      "oauth_client": [],
+      "api_key": [
+        {
+          "current_key": "AIzaSyA2414zGiQceTrFLSkyuympsmP8Qp2FrOs"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": []
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

android/build.gradle.kts

@@ -1,3 +1,7 @@
+plugins {
+    id("com.google.gms.google-services") version "4.4.2" apply false
+}
+
 allprojects {
     repositories {
         google()

lib/core/config/env_config.dart

@@ -0,0 +1,8 @@
+class EnvConfig {
+  static const String firebaseDatabaseUrl = String.fromEnvironment(
+    'FIREBASE_DB_URL',
+    defaultValue: '',
+  );
+
+  static bool get isConfigured => firebaseDatabaseUrl.isNotEmpty;
+}

lib/core/constants.dart

@@ -1 +1,53 @@
-// Add your API keys/colors here
+import 'config/env_config.dart';
+
+// App Info
+const String appName = 'Vector';
+
+// Firebase Database
+const String firebaseDatabaseUrl = EnvConfig.firebaseDatabaseUrl;
+
+// Database Paths
+const String usersPath = 'users';
+const String onboardingPath = 'onboarding';
+const String connectionTestPath = '_connection_test';
+const String connectedInfoPath = '.info/connected';
+
+// Colors
+const int colorBackground = 0xFF0B0B0F;
+const int colorPrimary = 0xFF693298;
+const int colorPrimaryDark = 0xFF562A7D;
+const int colorSecondary = 0xFF2A2438;
+const int colorAccent = 0xFFEE94FE;
+const int colorTextPrimary = 0xFFF5F5F5;
+const int colorTextSecondary = 0xFFFFFFFF;
+
+// Sizes
+const double paddingSmall = 8.0;
+const double paddingMedium = 16.0;
+const double paddingLarge = 24.0;
+const double borderRadius = 12.0;
+const double borderRadiusButton = 26.0;
+const double buttonHeight = 52.0;
+const double iconSizeSmall = 16.0;
+const double iconSizeMedium = 24.0;
+const double iconSizeLarge = 32.0;
+
+// Text Sizes
+const double textSizeSmall = 14.0;
+const double textSizeMedium = 18.0;
+const double textSizeLarge = 24.0;
+const double textSizeXLarge = 28.0;
+
+// Age Picker
+const int minAge = 13;
+const int maxAge = 120;
+const double agePickerHeight = 192.6;
+const double agePickerItemExtent = 50.0;
+
+// Height Picker (in cm)
+const int minHeight = 100;
+const int maxHeight = 250;
+
+// Weight Picker (in kg)
+const int minWeight = 30;
+const int maxWeight = 200;

lib/core/services/auth_service.dart

@@ -0,0 +1,41 @@
+import 'package:firebase_auth/firebase_auth.dart';
+
+class AuthService {
+  final FirebaseAuth _auth = FirebaseAuth.instance;
+
+  // REGISTER
+  Future<User?> register({
+    required String email,
+    required String password,
+  }) async {
+    final userCredential = await _auth.createUserWithEmailAndPassword(
+      email: email,
+      password: password,
+    );
+    return userCredential.user;
+  }
+
+  // LOGIN
+  Future<User?> login({
+    required String email,
+    required String password,
+  }) async {
+    final userCredential = await _auth.signInWithEmailAndPassword(
+      email: email,
+      password: password,
+    );
+    return userCredential.user;
+  }
+
+  // FORGOT PASSWORD
+  Future<void> resetPassword({
+    required String email,
+  }) async {
+    await _auth.sendPasswordResetEmail(email: email);
+  }
+
+  // LOGOUT (future use)
+  Future<void> logout() async {
+    await _auth.signOut();
+  }
+}

lib/core/utils/firebase_test_util.dart

@@ -0,0 +1,119 @@
+import 'package:flutter/foundation.dart';
+import '../services/firebase_database_service.dart';
+import '../../models/onboarding_data_model.dart';
+
+class FirebaseTestUtil {
+  static final FirebaseDatabaseService _service = FirebaseDatabaseService();
+
+  static Future<void> runAllTests() async {
+    debugPrint('═══════════════════════════════════════════');
+    debugPrint('🔥 Firebase Realtime Database Test Suite');
+    debugPrint('═══════════════════════════════════════════\n');
+
+    await _testConnection();
+    await _testWriteAndRead();
+    await _testUpdate();
+    await _testDelete();
+
+    debugPrint('═══════════════════════════════════════════');
+    debugPrint('✅ All tests completed');
+    debugPrint('═══════════════════════════════════════════');
+  }
+
+  static Future<void> _testConnection() async {
+    debugPrint('📡 Test 1: Connection Test');
+    debugPrint('───────────────────────────────────────────');
+
+    final result = await _service.testConnection();
+
+    if (result.success) {
+      debugPrint('   ✅ ${result.message}');
+    } else {
+      debugPrint('   ❌ ${result.message}');
+    }
+    debugPrint('');
+  }
+
+  static Future<void> _testWriteAndRead() async {
+    debugPrint('📝 Test 2: Write and Read');
+    debugPrint('───────────────────────────────────────────');
+
+    const testUserId = 'test_user_001';
+    final testData = OnboardingDataModel(
+      gender: Gender.male,
+      age: 25,
+      height: 175,
+      heightUnit: 'cm',
+      weight: 70,
+      weightUnit: 'kg',
+      goals: [FitnessGoal.muscleGain, FitnessGoal.betterEndurance],
+    );
+
+    try {
+      await _service.saveOnboardingData(testUserId, testData);
+      debugPrint('   ✅ Write successful');
+
+      final readData = await _service.getOnboardingData(testUserId);
+      if (readData != null) {
+        debugPrint('   ✅ Read successful');
+        debugPrint(
+          '   📄 Data: Gender=${readData.gender?.name}, Age=${readData.age}',
+        );
+        debugPrint('   📄 Height=${readData.height}${readData.heightUnit}');
+        debugPrint('   📄 Weight=${readData.weight}${readData.weightUnit}');
+        debugPrint(
+          '   📄 Goals=${readData.goals?.map((g) => g.name).join(", ")}',
+        );
+      } else {
+        debugPrint('   ❌ Read failed: No data returned');
+      }
+    } catch (e) {
+      debugPrint('   ❌ Error: $e');
+    }
+    debugPrint('');
+  }
+
+  static Future<void> _testUpdate() async {
+    debugPrint('🔄 Test 3: Update');
+    debugPrint('───────────────────────────────────────────');
+
+    const testUserId = 'test_user_001';
+
+    try {
+      await _service.updateOnboardingField(testUserId, {'age': 26});
+      debugPrint('   ✅ Update successful');
+
+      final updated = await _service.getOnboardingData(testUserId);
+      if (updated?.age == 26) {
+        debugPrint('   ✅ Verified: Age updated to ${updated?.age}');
+      } else {
+        debugPrint('   ❌ Update verification failed');
+      }
+    } catch (e) {
+      debugPrint('   ❌ Error: $e');
+    }
+    debugPrint('');
+  }
+
+  static Future<void> _testDelete() async {
+    debugPrint('🗑️ Test 4: Delete');
+    debugPrint('───────────────────────────────────────────');
+
+    const testUserId = 'test_user_001';
+
+    try {
+      await _service.deleteOnboardingData(testUserId);
+      debugPrint('   ✅ Delete successful');
+
+      final deleted = await _service.getOnboardingData(testUserId);
+      if (deleted == null) {
+        debugPrint('   ✅ Verified: Data removed');
+      } else {
+        debugPrint('   ❌ Delete verification failed');
+      }
+    } catch (e) {
+      debugPrint('   ❌ Error: $e');
+    }
+    debugPrint('');
+  }
+}

lib/main.dart

@@ -1,28 +1,56 @@
+// import 'package:flutter/material.dart';
+// import 'package:provider/provider.dart';
+
+// import 'view_models/home_view_model.dart';
+
+// void main() {
+//   runApp(const MyApp());
+// }
+
+// class MyApp extends StatelessWidget {
+//   const MyApp({super.key});
+
+//   @override
+//   Widget build(BuildContext context) {
+//     return MultiProvider(
+//       providers: [ChangeNotifierProvider(create: (_) => HomeViewModel())],
+//       child: MaterialApp(
+//         title: 'Vector',
+//         debugShowCheckedModeBanner: false,
+//         theme: ThemeData(
+//           colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+//           useMaterial3: true,
+//         ),
+//         home: const Scaffold(body: Center(child: Text('Vector'))),
+//       ),
+//     );
+//   }
+// }
+
 import 'package:flutter/material.dart';
+import 'views/welcome_view.dart';
 import 'package:provider/provider.dart';
+import 'package:firebase_core/firebase_core.dart';
+import 'view_models/auth_view_model.dart';
 
-import 'view_models/home_view_model.dart';
-
-void main() {
-  runApp(const MyApp());
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await Firebase.initializeApp();
+  runApp(const VectorApp());
 }
-
-class MyApp extends StatelessWidget {
-  const MyApp({super.key});
+class VectorApp extends StatelessWidget {
+  const VectorApp({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return MultiProvider(
-      providers: [ChangeNotifierProvider(create: (_) => HomeViewModel())],
-      child: MaterialApp(
-        title: 'Vector',
-        debugShowCheckedModeBanner: false,
-        theme: ThemeData(
-          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-          useMaterial3: true,
-        ),
-        home: const Scaffold(body: Center(child: Text('Vector'))),
-      ),
-    );
+ return MultiProvider(
+  providers: [
+    ChangeNotifierProvider(create: (_) => AuthViewModel()),
+  ],
+  child: const MaterialApp(
+    debugShowCheckedModeBanner: false,
+    home: WelcomeView(),
+  ),
+);
   }
 }