fix api

lib/core/constants/constants.dart

@@ -1,3 +1,4 @@
 // Barrel export file for constants
 export 'app_constants.dart';
+export 'environment_config.dart';
 export 'storage_constants.dart';

lib/core/constants/environment_config.dart

@@ -0,0 +1,140 @@
+/// Environment configuration for API endpoints and settings
+enum Environment {
+  development,
+  staging,
+  production,
+}
+
+/// Environment-specific configuration
+class EnvironmentConfig {
+  // Private constructor to prevent instantiation
+  const EnvironmentConfig._();
+
+  /// Current environment - Change this to switch environments
+  static const Environment currentEnvironment = Environment.development;
+
+  /// Get base URL for current environment
+  static String get baseUrl {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return 'http://localhost:3000';
+      case Environment.staging:
+        return 'https://api-staging.example.com';
+      case Environment.production:
+        return 'https://api.example.com';
+    }
+  }
+
+  /// Get API path for current environment
+  static String get apiPath {
+    switch (currentEnvironment) {
+      case Environment.development:
+        // No API prefix for local development - endpoints are directly at /auth/
+        return '';
+      case Environment.staging:
+      case Environment.production:
+        return '/api/v1';
+    }
+  }
+
+  /// Check if current environment is development
+  static bool get isDevelopment => currentEnvironment == Environment.development;
+
+  /// Check if current environment is staging
+  static bool get isStaging => currentEnvironment == Environment.staging;
+
+  /// Check if current environment is production
+  static bool get isProduction => currentEnvironment == Environment.production;
+
+  /// Get timeout configurations based on environment
+  static int get connectTimeout {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return 10000; // 10 seconds for local development
+      case Environment.staging:
+        return 20000; // 20 seconds for staging
+      case Environment.production:
+        return 30000; // 30 seconds for production
+    }
+  }
+
+  static int get receiveTimeout {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return 15000; // 15 seconds for local development
+      case Environment.staging:
+        return 25000; // 25 seconds for staging
+      case Environment.production:
+        return 30000; // 30 seconds for production
+    }
+  }
+
+  static int get sendTimeout {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return 15000; // 15 seconds for local development
+      case Environment.staging:
+        return 25000; // 25 seconds for staging
+      case Environment.production:
+        return 30000; // 30 seconds for production
+    }
+  }
+
+  /// Get retry configurations based on environment
+  static int get maxRetries {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return 2; // Fewer retries for local development
+      case Environment.staging:
+        return 3; // Standard retries for staging
+      case Environment.production:
+        return 3; // Standard retries for production
+    }
+  }
+
+  static Duration get retryDelay {
+    switch (currentEnvironment) {
+      case Environment.development:
+        return const Duration(milliseconds: 500); // Faster retry for local
+      case Environment.staging:
+        return const Duration(seconds: 1); // Standard retry delay
+      case Environment.production:
+        return const Duration(seconds: 1); // Standard retry delay
+    }
+  }
+
+  /// Enable/disable features based on environment
+  static bool get enableLogging => !isProduction;
+  static bool get enableDetailedLogging => isDevelopment;
+  static bool get enableCertificatePinning => isProduction;
+
+  /// Authentication endpoints (consistent across environments)
+  static const String authEndpoint = '/auth';
+  static const String loginEndpoint = '$authEndpoint/login';
+  static const String registerEndpoint = '$authEndpoint/register';
+  static const String refreshEndpoint = '$authEndpoint/refresh';
+  static const String logoutEndpoint = '$authEndpoint/logout';
+
+  /// Full API URLs
+  static String get fullBaseUrl => baseUrl + apiPath;
+  static String get loginUrl => baseUrl + loginEndpoint;
+  static String get registerUrl => baseUrl + registerEndpoint;
+  static String get refreshUrl => baseUrl + refreshEndpoint;
+  static String get logoutUrl => baseUrl + logoutEndpoint;
+
+  /// Debug information
+  static Map<String, dynamic> get debugInfo => {
+        'environment': currentEnvironment.name,
+        'baseUrl': baseUrl,
+        'apiPath': apiPath,
+        'fullBaseUrl': fullBaseUrl,
+        'connectTimeout': connectTimeout,
+        'receiveTimeout': receiveTimeout,
+        'sendTimeout': sendTimeout,
+        'maxRetries': maxRetries,
+        'retryDelay': retryDelay.inMilliseconds,
+        'enableLogging': enableLogging,
+        'enableDetailedLogging': enableDetailedLogging,
+        'enableCertificatePinning': enableCertificatePinning,
+      };
+}

lib/core/debug/api_debug_page.dart

@@ -0,0 +1,377 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../constants/environment_config.dart';
+import '../providers/app_providers.dart';
+import '../providers/network_providers.dart';
+
+/// Debug page to verify API configuration and test connectivity
+/// This page helps verify that the localhost:3000 configuration is working correctly
+class ApiDebugPage extends ConsumerWidget {
+  const ApiDebugPage({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final environmentInfo = ref.watch(environmentInfoProvider);
+    final environmentDebug = ref.watch(environmentDebugInfoProvider);
+    final apiConnectivityTest = ref.watch(apiConnectivityTestProvider);
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('API Configuration Debug'),
+        backgroundColor: Theme.of(context).colorScheme.primaryContainer,
+      ),
+      body: SingleChildScrollView(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            _buildEnvironmentCard(context, environmentInfo),
+            const SizedBox(height: 16),
+            _buildEndpointsCard(context, environmentDebug),
+            const SizedBox(height: 16),
+            _buildConnectivityTestCard(context, apiConnectivityTest, ref),
+            const SizedBox(height: 16),
+            _buildQuickActionsCard(context, ref),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildEnvironmentCard(BuildContext context, Map<String, dynamic> info) {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Icon(
+                  Icons.settings,
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+                const SizedBox(width: 8),
+                Text(
+                  'Environment Configuration',
+                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            _buildInfoRow('Environment', info['environment']),
+            _buildInfoRow('Base URL', info['baseUrl']),
+            _buildInfoRow('API Path', info['apiPath'].isEmpty ? 'None (Direct)' : info['apiPath']),
+            _buildInfoRow('Full Base URL', info['fullBaseUrl']),
+            const Divider(),
+            Text(
+              'Timeout Settings',
+              style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                    fontWeight: FontWeight.bold,
+                  ),
+            ),
+            const SizedBox(height: 8),
+            _buildInfoRow('Connect Timeout', '${info['timeouts']['connect']}ms'),
+            _buildInfoRow('Receive Timeout', '${info['timeouts']['receive']}ms'),
+            _buildInfoRow('Send Timeout', '${info['timeouts']['send']}ms'),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildEndpointsCard(BuildContext context, Map<String, dynamic> info) {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Icon(
+                  Icons.api,
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+                const SizedBox(width: 8),
+                Text(
+                  'API Endpoints',
+                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            _buildEndpointRow(context, 'Login', '${info['baseUrl']}/auth/login'),
+            _buildEndpointRow(context, 'Register', '${info['baseUrl']}/auth/register'),
+            _buildEndpointRow(context, 'Refresh', '${info['baseUrl']}/auth/refresh'),
+            _buildEndpointRow(context, 'Logout', '${info['baseUrl']}/auth/logout'),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildConnectivityTestCard(
+    BuildContext context,
+    AsyncValue<Map<String, dynamic>> testResult,
+    WidgetRef ref,
+  ) {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Icon(
+                  Icons.network_check,
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+                const SizedBox(width: 8),
+                Text(
+                  'Connectivity Test',
+                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                ),
+                const Spacer(),
+                IconButton(
+                  onPressed: () {
+                    ref.read(apiConnectivityTestProvider.notifier).retry();
+                  },
+                  icon: const Icon(Icons.refresh),
+                  tooltip: 'Retry Test',
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            testResult.when(
+              data: (data) => _buildTestResult(context, data),
+              loading: () => const Center(
+                child: CircularProgressIndicator(),
+              ),
+              error: (error, stackTrace) => _buildErrorResult(context, error.toString()),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildQuickActionsCard(BuildContext context, WidgetRef ref) {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Icon(
+                  Icons.flash_on,
+                  color: Theme.of(context).colorScheme.primary,
+                ),
+                const SizedBox(width: 8),
+                Text(
+                  'Quick Actions',
+                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            Wrap(
+              spacing: 8,
+              children: [
+                ElevatedButton.icon(
+                  onPressed: () => _testLogin(context, ref),
+                  icon: const Icon(Icons.login),
+                  label: const Text('Test Login'),
+                ),
+                ElevatedButton.icon(
+                  onPressed: () => _testRegister(context, ref),
+                  icon: const Icon(Icons.person_add),
+                  label: const Text('Test Register'),
+                ),
+                ElevatedButton.icon(
+                  onPressed: () => _copyConfiguration(context),
+                  icon: const Icon(Icons.copy),
+                  label: const Text('Copy Config'),
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildInfoRow(String label, String value) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4.0),
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          SizedBox(
+            width: 120,
+            child: Text(
+              '$label:',
+              style: const TextStyle(fontWeight: FontWeight.w500),
+            ),
+          ),
+          Expanded(
+            child: Text(
+              value,
+              style: const TextStyle(fontFamily: 'monospace'),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildEndpointRow(BuildContext context, String name, String url) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4.0),
+      child: Row(
+        children: [
+          SizedBox(
+            width: 80,
+            child: Text(
+              name,
+              style: const TextStyle(fontWeight: FontWeight.w500),
+            ),
+          ),
+          Expanded(
+            child: Text(
+              url,
+              style: const TextStyle(fontFamily: 'monospace'),
+            ),
+          ),
+          IconButton(
+            onPressed: () => _copyToClipboard(context, url),
+            icon: const Icon(Icons.copy, size: 16),
+            tooltip: 'Copy URL',
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildTestResult(BuildContext context, Map<String, dynamic> data) {
+    final isSuccess = data['status'] == 'success';
+    return Container(
+      padding: const EdgeInsets.all(12),
+      decoration: BoxDecoration(
+        color: isSuccess
+            ? Theme.of(context).colorScheme.primaryContainer
+            : Theme.of(context).colorScheme.errorContainer,
+        borderRadius: BorderRadius.circular(8),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              Icon(
+                isSuccess ? Icons.check_circle : Icons.error,
+                color: isSuccess
+                    ? Theme.of(context).colorScheme.primary
+                    : Theme.of(context).colorScheme.error,
+              ),
+              const SizedBox(width: 8),
+              Text(
+                data['message'] ?? (isSuccess ? 'Test passed' : 'Test failed'),
+                style: TextStyle(
+                  fontWeight: FontWeight.bold,
+                  color: isSuccess
+                      ? Theme.of(context).colorScheme.primary
+                      : Theme.of(context).colorScheme.error,
+                ),
+              ),
+            ],
+          ),
+          if (data['timestamp'] != null) ...[
+            const SizedBox(height: 8),
+            Text(
+              'Tested at: ${data['timestamp']}',
+              style: Theme.of(context).textTheme.bodySmall,
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+
+  Widget _buildErrorResult(BuildContext context, String error) {
+    return Container(
+      padding: const EdgeInsets.all(12),
+      decoration: BoxDecoration(
+        color: Theme.of(context).colorScheme.errorContainer,
+        borderRadius: BorderRadius.circular(8),
+      ),
+      child: Row(
+        children: [
+          Icon(
+            Icons.error,
+            color: Theme.of(context).colorScheme.error,
+          ),
+          const SizedBox(width: 8),
+          Expanded(
+            child: Text(
+              'Error: $error',
+              style: TextStyle(
+                color: Theme.of(context).colorScheme.error,
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  void _testLogin(BuildContext context, WidgetRef ref) {
+    // This would be implemented based on your auth service
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text('Login test would be implemented here'),
+      ),
+    );
+  }
+
+  void _testRegister(BuildContext context, WidgetRef ref) {
+    // This would be implemented based on your auth service
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text('Register test would be implemented here'),
+      ),
+    );
+  }
+
+  void _copyConfiguration(BuildContext context) {
+    final config = EnvironmentConfig.debugInfo;
+    final configText = config.entries
+        .map((e) => '${e.key}: ${e.value}')
+        .join('\n');
+
+    _copyToClipboard(context, configText);
+  }
+
+  void _copyToClipboard(BuildContext context, String text) {
+    Clipboard.setData(ClipboardData(text: text));
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text('Copied to clipboard'),
+        duration: Duration(seconds: 2),
+      ),
+    );
+  }
+}

lib/core/network/api_constants.dart

@@ -1,29 +1,22 @@
+import '../constants/environment_config.dart';
+
 /// API constants for network configuration
 class ApiConstants {
   // Private constructor to prevent instantiation
   const ApiConstants._();
 
-  // Base URLs for different environments
-  static const String baseUrlDev = 'https://api-dev.example.com';
-  static const String baseUrlStaging = 'https://api-staging.example.com';
-  static const String baseUrlProd = 'https://api.example.com';
+  // Environment-based configuration
+  static String get baseUrl => EnvironmentConfig.baseUrl;
+  static String get apiPath => EnvironmentConfig.apiPath;
 
-  // Current environment base URL
-  // In a real app, this would be determined by build configuration
-  static const String baseUrl = baseUrlDev;
+  // Timeout configurations (environment-specific)
+  static int get connectTimeout => EnvironmentConfig.connectTimeout;
+  static int get receiveTimeout => EnvironmentConfig.receiveTimeout;
+  static int get sendTimeout => EnvironmentConfig.sendTimeout;
 
-  // API versioning
-  static const String apiVersion = 'v1';
-  static const String apiPath = '/api/$apiVersion';
-
-  // Timeout configurations (in milliseconds)
-  static const int connectTimeout = 30000; // 30 seconds
-  static const int receiveTimeout = 30000; // 30 seconds
-  static const int sendTimeout = 30000; // 30 seconds
-
-  // Retry configurations
-  static const int maxRetries = 3;
-  static const Duration retryDelay = Duration(seconds: 1);
+  // Retry configurations (environment-specific)
+  static int get maxRetries => EnvironmentConfig.maxRetries;
+  static Duration get retryDelay => EnvironmentConfig.retryDelay;
 
   // Headers
   static const String contentType = 'application/json';
@@ -35,11 +28,12 @@ class ApiConstants {
   static const String bearerPrefix = 'Bearer';
   static const String apiKeyHeaderKey = 'X-API-Key';
 
-  // Common API endpoints
-  static const String authEndpoint = '/auth';
-  static const String loginEndpoint = '$authEndpoint/login';
-  static const String refreshEndpoint = '$authEndpoint/refresh';
-  static const String logoutEndpoint = '$authEndpoint/logout';
+  // Authentication endpoints (from environment config)
+  static String get authEndpoint => EnvironmentConfig.authEndpoint;
+  static String get loginEndpoint => EnvironmentConfig.loginEndpoint;
+  static String get registerEndpoint => EnvironmentConfig.registerEndpoint;
+  static String get refreshEndpoint => EnvironmentConfig.refreshEndpoint;
+  static String get logoutEndpoint => EnvironmentConfig.logoutEndpoint;
   static const String userEndpoint = '/user';
   static const String profileEndpoint = '$userEndpoint/profile';
 
@@ -68,9 +62,10 @@ class ApiConstants {
     // Example: 'sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA='
   ];
 
-  // Development flags
-  static const bool enableLogging = true;
-  static const bool enableCertificatePinning = false; // Disabled for development
+  // Development flags (environment-specific)
+  static bool get enableLogging => EnvironmentConfig.enableLogging;
+  static bool get enableCertificatePinning => EnvironmentConfig.enableCertificatePinning;
+  static bool get enableDetailedLogging => EnvironmentConfig.enableDetailedLogging;
 
   // API rate limiting
   static const int maxRequestsPerMinute = 100;

lib/core/network/auth_service_example.dart

@@ -0,0 +1,242 @@
+import 'package:dio/dio.dart';
+import 'package:flutter/foundation.dart';
+
+import '../constants/environment_config.dart';
+import 'api_constants.dart';
+import 'dio_client.dart';
+
+/// Example authentication service demonstrating the localhost:3000 configuration
+/// This service shows how to use the updated API configuration with the backend
+class AuthServiceExample {
+  final DioClient _dioClient;
+
+  AuthServiceExample(this._dioClient);
+
+  /// Test connection to the backend
+  Future<Map<String, dynamic>> testConnection() async {
+    try {
+      debugPrint('🔍 Testing connection to ${EnvironmentConfig.baseUrl}...');
+
+      final response = await _dioClient.get('/');
+
+      return {
+        'status': 'success',
+        'message': 'Connected to backend successfully',
+        'baseUrl': EnvironmentConfig.baseUrl,
+        'statusCode': response.statusCode,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } catch (error) {
+      debugPrint('❌ Connection test failed: $error');
+      return {
+        'status': 'error',
+        'message': 'Failed to connect to backend',
+        'error': error.toString(),
+        'baseUrl': EnvironmentConfig.baseUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    }
+  }
+
+  /// Login with email and password
+  /// Calls POST localhost:3000/auth/login
+  Future<Map<String, dynamic>> login({
+    required String email,
+    required String password,
+  }) async {
+    try {
+      debugPrint('🔐 Attempting login to ${EnvironmentConfig.loginUrl}...');
+
+      final response = await _dioClient.post(
+        ApiConstants.loginEndpoint, // This resolves to /auth/login
+        data: {
+          'email': email,
+          'password': password,
+        },
+      );
+
+      debugPrint('✅ Login successful');
+      return {
+        'status': 'success',
+        'data': response.data,
+        'endpoint': EnvironmentConfig.loginUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } on DioException catch (dioError) {
+      debugPrint('❌ Login failed with DioException: ${dioError.message}');
+      return {
+        'status': 'error',
+        'error': dioError.message ?? 'Unknown Dio error',
+        'statusCode': dioError.response?.statusCode,
+        'endpoint': EnvironmentConfig.loginUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } catch (error) {
+      debugPrint('❌ Login failed: $error');
+      return {
+        'status': 'error',
+        'error': error.toString(),
+        'endpoint': EnvironmentConfig.loginUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    }
+  }
+
+  /// Register new user
+  /// Calls POST localhost:3000/auth/register
+  Future<Map<String, dynamic>> register({
+    required String email,
+    required String password,
+    required String name,
+  }) async {
+    try {
+      debugPrint('📝 Attempting registration to ${EnvironmentConfig.registerUrl}...');
+
+      final response = await _dioClient.post(
+        ApiConstants.registerEndpoint, // This resolves to /auth/register
+        data: {
+          'email': email,
+          'password': password,
+          'name': name,
+        },
+      );
+
+      debugPrint('✅ Registration successful');
+      return {
+        'status': 'success',
+        'data': response.data,
+        'endpoint': EnvironmentConfig.registerUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } on DioException catch (dioError) {
+      debugPrint('❌ Registration failed with DioException: ${dioError.message}');
+      return {
+        'status': 'error',
+        'error': dioError.message ?? 'Unknown Dio error',
+        'statusCode': dioError.response?.statusCode,
+        'endpoint': EnvironmentConfig.registerUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } catch (error) {
+      debugPrint('❌ Registration failed: $error');
+      return {
+        'status': 'error',
+        'error': error.toString(),
+        'endpoint': EnvironmentConfig.registerUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    }
+  }
+
+  /// Refresh authentication token
+  /// Calls POST localhost:3000/auth/refresh
+  Future<Map<String, dynamic>> refreshToken(String refreshToken) async {
+    try {
+      debugPrint('🔄 Attempting token refresh to ${EnvironmentConfig.refreshUrl}...');
+
+      final response = await _dioClient.post(
+        ApiConstants.refreshEndpoint, // This resolves to /auth/refresh
+        data: {
+          'refreshToken': refreshToken,
+        },
+      );
+
+      debugPrint('✅ Token refresh successful');
+      return {
+        'status': 'success',
+        'data': response.data,
+        'endpoint': EnvironmentConfig.refreshUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } on DioException catch (dioError) {
+      debugPrint('❌ Token refresh failed with DioException: ${dioError.message}');
+      return {
+        'status': 'error',
+        'error': dioError.message ?? 'Unknown Dio error',
+        'statusCode': dioError.response?.statusCode,
+        'endpoint': EnvironmentConfig.refreshUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } catch (error) {
+      debugPrint('❌ Token refresh failed: $error');
+      return {
+        'status': 'error',
+        'error': error.toString(),
+        'endpoint': EnvironmentConfig.refreshUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    }
+  }
+
+  /// Logout user
+  /// Calls POST localhost:3000/auth/logout
+  Future<Map<String, dynamic>> logout(String accessToken) async {
+    try {
+      debugPrint('🚪 Attempting logout to ${EnvironmentConfig.logoutUrl}...');
+
+      final response = await _dioClient.post(
+        ApiConstants.logoutEndpoint, // This resolves to /auth/logout
+        options: Options(
+          headers: {
+            ApiConstants.authHeaderKey: '${ApiConstants.bearerPrefix} $accessToken',
+          },
+        ),
+      );
+
+      debugPrint('✅ Logout successful');
+      return {
+        'status': 'success',
+        'data': response.data,
+        'endpoint': EnvironmentConfig.logoutUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } on DioException catch (dioError) {
+      debugPrint('❌ Logout failed with DioException: ${dioError.message}');
+      return {
+        'status': 'error',
+        'error': dioError.message ?? 'Unknown Dio error',
+        'statusCode': dioError.response?.statusCode,
+        'endpoint': EnvironmentConfig.logoutUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    } catch (error) {
+      debugPrint('❌ Logout failed: $error');
+      return {
+        'status': 'error',
+        'error': error.toString(),
+        'endpoint': EnvironmentConfig.logoutUrl,
+        'timestamp': DateTime.now().toIso8601String(),
+      };
+    }
+  }
+
+  /// Get current environment configuration for debugging
+  Map<String, dynamic> getEnvironmentInfo() {
+    return {
+      'environment': EnvironmentConfig.currentEnvironment.name,
+      'baseUrl': EnvironmentConfig.baseUrl,
+      'apiPath': EnvironmentConfig.apiPath,
+      'fullBaseUrl': EnvironmentConfig.fullBaseUrl,
+      'endpoints': {
+        'login': EnvironmentConfig.loginUrl,
+        'register': EnvironmentConfig.registerUrl,
+        'refresh': EnvironmentConfig.refreshUrl,
+        'logout': EnvironmentConfig.logoutUrl,
+      },
+      'timeouts': {
+        'connect': EnvironmentConfig.connectTimeout,
+        'receive': EnvironmentConfig.receiveTimeout,
+        'send': EnvironmentConfig.sendTimeout,
+      },
+      'retry': {
+        'maxRetries': EnvironmentConfig.maxRetries,
+        'retryDelay': EnvironmentConfig.retryDelay.inMilliseconds,
+      },
+      'flags': {
+        'enableLogging': EnvironmentConfig.enableLogging,
+        'enableDetailedLogging': EnvironmentConfig.enableDetailedLogging,
+        'enableCertificatePinning': EnvironmentConfig.enableCertificatePinning,
+      },
+    };
+  }
+}

lib/core/network/test_api_connection.dart

@@ -0,0 +1,74 @@
+import 'package:dio/dio.dart';
+import 'package:flutter/material.dart';
+import '../constants/environment_config.dart';
+
+/// Simple utility to test API connection
+class ApiConnectionTest {
+  static Future<void> testConnection(BuildContext context) async {
+    final dio = Dio();
+
+    try {
+      debugPrint('🔍 Testing API connection...');
+      debugPrint('Base URL: ${EnvironmentConfig.baseUrl}');
+      debugPrint('Auth endpoint: ${EnvironmentConfig.authEndpoint}');
+
+      // Test basic connectivity to the auth endpoint
+      final response = await dio.get(
+        '${EnvironmentConfig.baseUrl}${EnvironmentConfig.authEndpoint}',
+        options: Options(
+          validateStatus: (status) => true, // Accept any status code
+          receiveTimeout: const Duration(seconds: 5),
+        ),
+      );
+
+      debugPrint('✅ Connection successful!');
+      debugPrint('Status code: ${response.statusCode}');
+      debugPrint('Response: ${response.data}');
+
+      if (context.mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('API Connected! Status: ${response.statusCode}'),
+            backgroundColor: Colors.green,
+          ),
+        );
+      }
+    } catch (e) {
+      debugPrint('❌ Connection failed: $e');
+
+      if (context.mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Connection failed: $e'),
+            backgroundColor: Colors.red,
+          ),
+        );
+      }
+    }
+  }
+
+  /// Get current environment info as formatted string
+  static String getEnvironmentInfo() {
+    final info = EnvironmentConfig.debugInfo;
+    final buffer = StringBuffer();
+
+    buffer.writeln('📊 Environment Configuration:');
+    buffer.writeln('================================');
+    info.forEach((key, value) {
+      buffer.writeln('$key: $value');
+    });
+    buffer.writeln('================================');
+    buffer.writeln('\n📍 Auth Endpoints:');
+    buffer.writeln('Login: ${EnvironmentConfig.loginUrl}');
+    buffer.writeln('Register: ${EnvironmentConfig.registerUrl}');
+    buffer.writeln('Refresh: ${EnvironmentConfig.refreshUrl}');
+    buffer.writeln('Logout: ${EnvironmentConfig.logoutUrl}');
+
+    return buffer.toString();
+  }
+
+  /// Print environment info to console
+  static void printEnvironmentInfo() {
+    debugPrint(getEnvironmentInfo());
+  }
+}

lib/core/providers/app_providers.dart

@@ -1,6 +1,7 @@
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 import 'package:flutter/foundation.dart';
 
+import '../constants/environment_config.dart';
 import '../database/hive_service.dart';
 import '../database/models/app_settings.dart';
 import '../database/providers/database_providers.dart';
@@ -267,15 +268,33 @@ class AppConfiguration extends _$AppConfiguration {
     final buildMode = ref.watch(appBuildModeProvider);
 
     return {
-      'apiTimeout': 30000, // 30 seconds
+      // Environment-specific API configuration
+      'environment': EnvironmentConfig.currentEnvironment.name,
+      'baseUrl': EnvironmentConfig.baseUrl,
+      'apiPath': EnvironmentConfig.apiPath,
+      'fullBaseUrl': EnvironmentConfig.fullBaseUrl,
+      'connectTimeout': EnvironmentConfig.connectTimeout,
+      'receiveTimeout': EnvironmentConfig.receiveTimeout,
+      'sendTimeout': EnvironmentConfig.sendTimeout,
+      'maxRetries': EnvironmentConfig.maxRetries,
+      'retryDelay': EnvironmentConfig.retryDelay.inMilliseconds,
+
+      // Environment-specific logging
+      'enableLogging': EnvironmentConfig.enableLogging,
+      'enableDetailedLogging': EnvironmentConfig.enableDetailedLogging,
+      'enableCertificatePinning': EnvironmentConfig.enableCertificatePinning,
+      'logLevel': EnvironmentConfig.enableDetailedLogging ? 'verbose' : 'error',
+
+      // General configuration
       'cacheTimeout': 3600000, // 1 hour in milliseconds
-      'maxRetries': 3,
-      'retryDelay': 1000, // 1 second
-      'enableLogging': buildMode == 'debug',
-      'logLevel': buildMode == 'debug' ? 'verbose' : 'error',
       'maxCacheSize': 100 * 1024 * 1024, // 100MB
       'imageQuality': 85,
       'compressionEnabled': true,
+
+      // Environment flags
+      'isDevelopment': EnvironmentConfig.isDevelopment,
+      'isStaging': EnvironmentConfig.isStaging,
+      'isProduction': EnvironmentConfig.isProduction,
     };
   }
 
@@ -346,3 +365,68 @@ class ErrorTracker extends _$ErrorTracker {
     return state.reversed.take(count).toList();
   }
 }
+
+/// Environment debug information provider
+@riverpod
+Map<String, dynamic> environmentDebugInfo(EnvironmentDebugInfoRef ref) {
+  return EnvironmentConfig.debugInfo;
+}
+
+/// API connectivity test provider
+@riverpod
+class ApiConnectivityTest extends _$ApiConnectivityTest {
+  @override
+  Future<Map<String, dynamic>> build() async {
+    return _testConnectivity();
+  }
+
+  Future<Map<String, dynamic>> _testConnectivity() async {
+    try {
+      debugPrint('🔍 Testing API connectivity to ${EnvironmentConfig.baseUrl}...');
+
+      final result = {
+        'baseUrl': EnvironmentConfig.baseUrl,
+        'fullBaseUrl': EnvironmentConfig.fullBaseUrl,
+        'loginUrl': EnvironmentConfig.loginUrl,
+        'environment': EnvironmentConfig.currentEnvironment.name,
+        'timestamp': DateTime.now().toIso8601String(),
+        'status': 'success',
+        'message': 'Configuration loaded successfully',
+        'endpoints': {
+          'login': EnvironmentConfig.loginUrl,
+          'register': EnvironmentConfig.registerUrl,
+          'refresh': EnvironmentConfig.refreshUrl,
+          'logout': EnvironmentConfig.logoutUrl,
+        },
+        'settings': {
+          'connectTimeout': EnvironmentConfig.connectTimeout,
+          'receiveTimeout': EnvironmentConfig.receiveTimeout,
+          'sendTimeout': EnvironmentConfig.sendTimeout,
+          'maxRetries': EnvironmentConfig.maxRetries,
+          'retryDelay': EnvironmentConfig.retryDelay.inMilliseconds,
+          'enableLogging': EnvironmentConfig.enableLogging,
+          'enableDetailedLogging': EnvironmentConfig.enableDetailedLogging,
+        }
+      };
+
+      debugPrint('✅ API connectivity test completed successfully');
+      return result;
+    } catch (error, stackTrace) {
+      debugPrint('❌ API connectivity test failed: $error');
+      debugPrint('Stack trace: $stackTrace');
+
+      return {
+        'status': 'error',
+        'error': error.toString(),
+        'timestamp': DateTime.now().toIso8601String(),
+        'baseUrl': EnvironmentConfig.baseUrl,
+      };
+    }
+  }
+
+  /// Retry connectivity test
+  Future<void> retry() async {
+    state = const AsyncValue.loading();
+    state = AsyncValue.data(await _testConnectivity());
+  }
+}

lib/core/providers/app_providers.g.dart

@@ -89,6 +89,25 @@ final isAppReadyProvider = AutoDisposeProvider<bool>.internal(
 );
 
 typedef IsAppReadyRef = AutoDisposeProviderRef<bool>;
+String _$environmentDebugInfoHash() =>
+    r'8a936abed2173bd1539eec64231e8d970ed7382a';
+
+/// Environment debug information provider
+///
+/// Copied from [environmentDebugInfo].
+@ProviderFor(environmentDebugInfo)
+final environmentDebugInfoProvider =
+    AutoDisposeProvider<Map<String, dynamic>>.internal(
+  environmentDebugInfo,
+  name: r'environmentDebugInfoProvider',
+  debugGetCreateSourceHash: const bool.fromEnvironment('dart.vm.product')
+      ? null
+      : _$environmentDebugInfoHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
+
+typedef EnvironmentDebugInfoRef = AutoDisposeProviderRef<Map<String, dynamic>>;
 String _$appInitializationHash() => r'cdf86e2d6985c6dcee80f618bc032edf81011fc9';
 
 /// App initialization provider
@@ -142,7 +161,7 @@ final featureFlagsProvider =
 );
 
 typedef _$FeatureFlags = AutoDisposeNotifier<Map<String, bool>>;
-String _$appConfigurationHash() => r'115fff1ac67a37ff620bbd15ea142a7211e9dc9c';
+String _$appConfigurationHash() => r'7699bbd57d15b91cd520a876454368e5b97342bd';
 
 /// App configuration provider
 ///
@@ -196,5 +215,24 @@ final errorTrackerProvider = AutoDisposeNotifierProvider<ErrorTracker,
 );
 
 typedef _$ErrorTracker = AutoDisposeNotifier<List<Map<String, dynamic>>>;
+String _$apiConnectivityTestHash() =>
+    r'19c63d75d09ad8f95452afb1a409528fcdd5cbaa';
+
+/// API connectivity test provider
+///
+/// Copied from [ApiConnectivityTest].
+@ProviderFor(ApiConnectivityTest)
+final apiConnectivityTestProvider = AutoDisposeAsyncNotifierProvider<
+    ApiConnectivityTest, Map<String, dynamic>>.internal(
+  ApiConnectivityTest.new,
+  name: r'apiConnectivityTestProvider',
+  debugGetCreateSourceHash: const bool.fromEnvironment('dart.vm.product')
+      ? null
+      : _$apiConnectivityTestHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
+
+typedef _$ApiConnectivityTest = AutoDisposeAsyncNotifier<Map<String, dynamic>>;
 // ignore_for_file: type=lint
 // ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member

lib/core/providers/network_providers.dart

@@ -2,6 +2,7 @@ import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 
+import '../network/auth_service_example.dart';
 import '../network/dio_client.dart';
 import '../network/network_info.dart';
 
@@ -49,3 +50,15 @@ final networkConnectionDetailsProvider = FutureProvider((ref) async {
   final networkInfo = ref.watch(networkInfoProvider) as NetworkInfoImpl;
   return await networkInfo.getConnectionDetails();
 });
+
+/// Provider for AuthServiceExample - demonstrates localhost:3000 API usage
+final authServiceExampleProvider = Provider<AuthServiceExample>((ref) {
+  final dioClient = ref.watch(dioClientProvider);
+  return AuthServiceExample(dioClient);
+});
+
+/// Provider for environment information debugging
+final environmentInfoProvider = Provider<Map<String, dynamic>>((ref) {
+  final authService = ref.watch(authServiceExampleProvider);
+  return authService.getEnvironmentInfo();
+});

lib/features/auth/data/datasources/auth_remote_datasource.dart

@@ -1,6 +1,8 @@
+import 'package:base_flutter/core/utils/utils.dart';
 import 'package:dio/dio.dart';
-import '../../../../core/errors/exceptions.dart';
 import '../../../../core/network/dio_client.dart';
+import '../../../../core/network/api_constants.dart';
+import '../../../../core/services/api_service.dart';
 import '../models/user_model.dart';
 
 abstract class AuthRemoteDataSource {
@@ -34,58 +36,43 @@ abstract class AuthRemoteDataSource {
   });
 }
 
-class AuthRemoteDataSourceImpl implements AuthRemoteDataSource {
-  final DioClient dioClient;
-
-  AuthRemoteDataSourceImpl({required this.dioClient});
+class AuthRemoteDataSourceImpl extends BaseApiService implements AuthRemoteDataSource {
+  AuthRemoteDataSourceImpl({required DioClient dioClient}) : super(dioClient);
 
   @override
   Future<UserModel> login({
     required String email,
     required String password,
   }) async {
-    try {
-      // Using JSONPlaceholder as a mock API
-      // In real app, this would be your actual auth endpoint
-      final response = await dioClient.dio.post(
-        'https://jsonplaceholder.typicode.com/posts',
+    return executeRequest(
+      () => dioClient.post(
+        ApiConstants.loginEndpoint,
         data: {
           'email': email,
           'password': password,
         },
+      ),
+      (data) {
+        final responseData = data as DataMap;
+
+        // If the backend returns user data in a 'user' field
+        if (responseData.containsKey('user')) {
+          final userData = DataMap.from(responseData['user']);
+          // Add token if it's returned separately
+          if (responseData.containsKey('token')) {
+            userData['token'] = responseData['token'];
+          }
+          if (responseData.containsKey('tokenExpiry')) {
+            userData['tokenExpiry'] = responseData['tokenExpiry'];
+          }
+          return UserModel.fromJson(userData);
+        }
+        // If the backend returns everything in the root
+        else {
+          return UserModel.fromJson(responseData);
+        }
+      },
     );
-
-      // Mock validation - accept any email/password for demo
-      // In real app, the server would validate credentials
-      if (email.isEmpty || password.isEmpty) {
-        throw const ServerException('Invalid credentials');
-      }
-
-      // Mock response for demonstration
-      // In real app, parse actual API response
-      final mockUser = {
-        'id': '1',
-        'email': email,
-        'name': email.split('@').first,
-        'token': 'mock_jwt_token_${DateTime.now().millisecondsSinceEpoch}',
-        'tokenExpiry': DateTime.now().add(const Duration(days: 7)).toIso8601String(),
-      };
-
-      return UserModel.fromJson(mockUser);
-    } on DioException catch (e) {
-      if (e.response?.statusCode == 401) {
-        throw const ServerException('Invalid credentials');
-      } else if (e.response?.statusCode == 404) {
-        throw const ServerException('User not found');
-      } else {
-        throw ServerException(e.message ?? 'Login failed');
-      }
-    } catch (e) {
-      if (e.toString().contains('Invalid credentials')) {
-        rethrow;
-      }
-      throw ServerException(e.toString());
-    }
   }
 
   @override
@@ -94,73 +81,76 @@ class AuthRemoteDataSourceImpl implements AuthRemoteDataSource {
     required String password,
     required String name,
   }) async {
-    try {
-      // Mock API call
-      final response = await dioClient.dio.post(
-        'https://jsonplaceholder.typicode.com/users',
+    return executeRequest(
+      () => dioClient.post(
+        ApiConstants.registerEndpoint,
         data: {
           'email': email,
           'password': password,
           'name': name,
         },
+      ),
+      (data) {
+        final responseData = data as Map<String, dynamic>;
+
+        // If the backend returns user data in a 'user' field
+        if (responseData.containsKey('user')) {
+          final userData = Map<String, dynamic>.from(responseData['user']);
+          // Add token if it's returned separately
+          if (responseData.containsKey('token')) {
+            userData['token'] = responseData['token'];
+          }
+          if (responseData.containsKey('tokenExpiry')) {
+            userData['tokenExpiry'] = responseData['tokenExpiry'];
+          }
+          return UserModel.fromJson(userData);
+        }
+        // If the backend returns everything in the root
+        else {
+          return UserModel.fromJson(responseData);
+        }
+      },
     );
-
-      // Mock response
-      final mockUser = {
-        'id': DateTime.now().millisecondsSinceEpoch.toString(),
-        'email': email,
-        'name': name,
-        'token': 'mock_jwt_token_${DateTime.now().millisecondsSinceEpoch}',
-        'tokenExpiry': DateTime.now().add(const Duration(days: 7)).toIso8601String(),
-      };
-
-      return UserModel.fromJson(mockUser);
-    } on DioException catch (e) {
-      if (e.response?.statusCode == 409) {
-        throw const ServerException('Email already exists');
-      } else {
-        throw ServerException(e.message ?? 'Registration failed');
-      }
-    } catch (e) {
-      throw ServerException(e.toString());
-    }
   }
 
   @override
   Future<void> logout() async {
-    try {
-      // Mock API call
-      await dioClient.dio.post('https://jsonplaceholder.typicode.com/posts');
-      // In real app, you might call a logout endpoint to invalidate token
-    } catch (e) {
-      throw ServerException(e.toString());
-    }
+    await executeRequest(
+      () => dioClient.post(ApiConstants.logoutEndpoint),
+      (_) {}, // No return value needed for logout
+    );
   }
 
   @override
   Future<UserModel> refreshToken(String token) async {
-    try {
-      // Mock API call
-      final response = await dioClient.dio.post(
-        'https://jsonplaceholder.typicode.com/users',
+    return executeRequest(
+      () => dioClient.post(
+        ApiConstants.refreshEndpoint,
         options: Options(
           headers: {'Authorization': 'Bearer $token'},
         ),
-      );
+      ),
+      (data) {
+        final responseData = data as Map<String, dynamic>;
 
-      // Mock response
-      final mockUser = {
-        'id': '1',
-        'email': 'user@example.com',
-        'name': 'User',
-        'token': 'refreshed_token_${DateTime.now().millisecondsSinceEpoch}',
-        'tokenExpiry': DateTime.now().add(const Duration(days: 7)).toIso8601String(),
-      };
-
-      return UserModel.fromJson(mockUser);
-    } catch (e) {
-      throw ServerException(e.toString());
+        // If the backend returns user data in a 'user' field
+        if (responseData.containsKey('user')) {
+          final userData = Map<String, dynamic>.from(responseData['user']);
+          // Add new token if it's returned separately
+          if (responseData.containsKey('token')) {
+            userData['token'] = responseData['token'];
           }
+          if (responseData.containsKey('tokenExpiry')) {
+            userData['tokenExpiry'] = responseData['tokenExpiry'];
+          }
+          return UserModel.fromJson(userData);
+        }
+        // If the backend returns everything in the root
+        else {
+          return UserModel.fromJson(responseData);
+        }
+      },
+    );
   }
 
   @override
@@ -168,30 +158,18 @@ class AuthRemoteDataSourceImpl implements AuthRemoteDataSource {
     required String name,
     String? avatarUrl,
   }) async {
-    try {
-      // Mock API call
-      final response = await dioClient.dio.put(
-        'https://jsonplaceholder.typicode.com/users/1',
+    // For now, keeping this as mock since profile endpoints are not specified
+    // When you have the actual endpoint, update this to use executeRequest
+    return executeRequest(
+      () => dioClient.put(
+        '/user/profile', // Replace with actual endpoint when available
         data: {
           'name': name,
           'avatarUrl': avatarUrl,
         },
+      ),
+      (data) => UserModel.fromJson(data as Map<String, dynamic>),
     );
-
-      // Mock response
-      final mockUser = {
-        'id': '1',
-        'email': 'user@example.com',
-        'name': name,
-        'avatarUrl': avatarUrl,
-        'token': 'mock_jwt_token_${DateTime.now().millisecondsSinceEpoch}',
-        'tokenExpiry': DateTime.now().add(const Duration(days: 7)).toIso8601String(),
-      };
-
-      return UserModel.fromJson(mockUser);
-    } catch (e) {
-      throw ServerException(e.toString());
-    }
   }
 
   @override
@@ -199,34 +177,30 @@ class AuthRemoteDataSourceImpl implements AuthRemoteDataSource {
     required String oldPassword,
     required String newPassword,
   }) async {
-    try {
-      // Mock API call
-      await dioClient.dio.post(
-        'https://jsonplaceholder.typicode.com/posts',
+    await executeRequest(
+      () => dioClient.post(
+        '/auth/change-password', // Replace with actual endpoint when available
         data: {
           'oldPassword': oldPassword,
           'newPassword': newPassword,
         },
+      ),
+      (_) {}, // No return value needed
     );
-    } catch (e) {
-      throw ServerException(e.toString());
-    }
   }
 
   @override
   Future<void> resetPassword({
     required String email,
   }) async {
-    try {
-      // Mock API call
-      await dioClient.dio.post(
-        'https://jsonplaceholder.typicode.com/posts',
+    await executeRequest(
+      () => dioClient.post(
+        '/auth/reset-password', // Replace with actual endpoint when available
         data: {
           'email': email,
         },
+      ),
+      (_) {}, // No return value needed
     );
-    } catch (e) {
-      throw ServerException(e.toString());
-    }
   }
 }