feat: ajout d'un sélecteur de thèmes avec trois options (P'titsPas, Pastel, Sombre)

frontend/lib/main.dart

@@ -3,15 +3,18 @@ import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'theme/app_theme.dart';
+import 'theme/theme_provider.dart';
 import 'screens/auth/login_screen.dart';
-import 'screens/auth/register_screen.dart';
 import 'screens/auth/parent_register_screen.dart';
 import 'screens/home/home_screen.dart';
+import 'navigation/app_router.dart';
 
 void main() {
   runApp(
-    ChangeNotifierProvider(
+    MultiProvider(
-      create: (_) => AppTheme(),
+      providers: [
+        ChangeNotifierProvider(create: (_) => ThemeProvider()),
+      ],
       child: const MyApp(),
     ),
   );
@@ -24,10 +27,6 @@ final _router = GoRouter(
       path: '/login',
       builder: (context, state) => const LoginScreen(),
     ),
-    GoRoute(
-      path: '/register',
-      builder: (context, state) => const RegisterScreen(),
-    ),
     GoRoute(
       path: '/parent-register',
       builder: (context, state) => const ParentRegisterScreen(),
@@ -44,12 +43,19 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Consumer<AppTheme>(
+    return Consumer<ThemeProvider>(
-      builder: (context, appTheme, _) => MaterialApp.router(
+      builder: (context, themeProvider, _) {
+        final appTheme = AppTheme();
+        return MaterialApp.router(
           title: 'P\'titsPas',
-        theme: appTheme.lightTheme,
+          theme: themeProvider.currentTheme == ThemeType.darkTheme 
+            ? appTheme.darkTheme 
+            : (themeProvider.currentTheme == ThemeType.pastelTheme 
+              ? appTheme.pastelTheme 
+              : appTheme.lightTheme),
           routerConfig: _router,
-      ),
+        );
+      },
     );
   }
 } 

frontend/lib/screens/auth/login_screen.dart

@@ -1,6 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import '../../services/auth_service.dart';
+import '../../theme/theme_provider.dart';
+import '../../theme/app_theme.dart';
+import 'package:provider/provider.dart';
 
 class LoginScreen extends StatefulWidget {
   const LoginScreen({super.key});
@@ -15,6 +18,17 @@ class _LoginScreenState extends State<LoginScreen> {
   final _passwordController = TextEditingController();
   bool _isLoading = false;
 
+  String _getThemeName(ThemeType type) {
+    switch (type) {
+      case ThemeType.defaultTheme:
+        return "P'titsPas";
+      case ThemeType.pastelTheme:
+        return "Pastel";
+      case ThemeType.darkTheme:
+        return "Sombre";
+    }
+  }
+
   @override
   void dispose() {
     _emailController.dispose();
@@ -56,6 +70,29 @@ class _LoginScreenState extends State<LoginScreen> {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Connexion'),
+        actions: [
+          Consumer<ThemeProvider>(
+            builder: (context, themeProvider, child) {
+              return Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16.0),
+                child: DropdownButton<ThemeType>(
+                  value: themeProvider.currentTheme,
+                  items: ThemeType.values.map((ThemeType type) {
+                    return DropdownMenuItem<ThemeType>(
+                      value: type,
+                      child: Text(_getThemeName(type)),
+                    );
+                  }).toList(),
+                  onChanged: (ThemeType? newValue) {
+                    if (newValue != null) {
+                      themeProvider.setTheme(newValue);
+                    }
+                  },
+                ),
+              );
+            },
+          ),
+        ],
       ),
       body: Center(
         child: SingleChildScrollView(
@@ -105,11 +142,6 @@ class _LoginScreenState extends State<LoginScreen> {
                       : const Text('Se connecter'),
                 ),
                 const SizedBox(height: 16),
-                TextButton(
-                  onPressed: () => context.go('/register'),
-                  child: const Text('Créer un compte'),
-                ),
-                const SizedBox(height: 8),
                 TextButton(
                   onPressed: () => context.go('/parent-register'),
                   child: const Text('Créer un compte parent'),

frontend/lib/screens/home/home_screen.dart

@@ -1,16 +1,53 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../../theme/theme_provider.dart';
+import '../../theme/app_theme.dart';
 
 class HomeScreen extends StatelessWidget {
   const HomeScreen({super.key});
 
+  String _getThemeName(ThemeType type) {
+    switch (type) {
+      case ThemeType.defaultTheme:
+        return "P'titsPas";
+      case ThemeType.pastelTheme:
+        return "Pastel";
+      case ThemeType.darkTheme:
+        return "Sombre";
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('P\'titsPas'),
+        title: const Text('Accueil'),
+        actions: [
+          Consumer<ThemeProvider>(
+            builder: (context, themeProvider, child) {
+              return Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16.0),
+                child: DropdownButton<ThemeType>(
+                  value: themeProvider.currentTheme,
+                  items: ThemeType.values.map((ThemeType type) {
+                    return DropdownMenuItem<ThemeType>(
+                      value: type,
+                      child: Text(_getThemeName(type)),
+                    );
+                  }).toList(),
+                  onChanged: (ThemeType? newValue) {
+                    if (newValue != null) {
+                      themeProvider.setTheme(newValue);
+                    }
+                  },
+                ),
+              );
+            },
+          ),
+        ],
       ),
       body: const Center(
-        child: Text('Bienvenue sur P\'titsPas'),
+        child: Text('Bienvenue sur P\'titsPas !'),
       ),
     );
   }

frontend/lib/theme/app_theme.dart

@@ -4,6 +4,7 @@ import 'package:google_fonts/google_fonts.dart';
 enum ThemeType {
   defaultTheme,
   pastelTheme,
+  darkTheme,
   // Ajouter d'autres thèmes ici
 }
 
@@ -30,18 +31,96 @@ class AppTheme extends ChangeNotifier {
   static const Color _pastelWarningColor = Color(0xFFFFE4B5); // Jaune Pastel
   static const Color _pastelSuccessColor = Color(0xFFA5D6A7); // Vert Pastel
 
+  // Couleurs pour le thème sombre
+  static const Color _darkPrimaryColor = Color(0xFF4299E1);
+  static const Color _darkSecondaryColor = Color(0xFF2D3748);
+  static const Color _darkBackgroundColor = Color(0xFF1A202C);
+  static const Color _darkTextColor = Color(0xFFF7FAFC);
+  static const Color _darkErrorColor = Color(0xFFFEB2B2);
+  static const Color _darkWarningColor = Color(0xFFFBD38D);
+  static const Color _darkSuccessColor = Color(0xFF9AE6B4);
+
   // Configuration du thème actuel
   ThemeType _currentTheme = ThemeType.defaultTheme;
   ThemeType get currentTheme => _currentTheme;
 
   // Getters pour les couleurs du thème actuel
-  Color get primaryColor => _currentTheme == ThemeType.defaultTheme ? _defaultPrimaryColor : _pastelPrimaryColor;
+  Color get primaryColor {
-  Color get secondaryColor => _currentTheme == ThemeType.defaultTheme ? _defaultSecondaryColor : _pastelSecondaryColor;
+    switch (_currentTheme) {
-  Color get backgroundColor => _currentTheme == ThemeType.defaultTheme ? _defaultBackgroundColor : _pastelBackgroundColor;
+      case ThemeType.defaultTheme:
-  Color get textColor => _currentTheme == ThemeType.defaultTheme ? _defaultTextColor : _pastelTextColor;
+        return _defaultPrimaryColor;
-  Color get errorColor => _currentTheme == ThemeType.defaultTheme ? _defaultErrorColor : _pastelErrorColor;
+      case ThemeType.pastelTheme:
-  Color get warningColor => _currentTheme == ThemeType.defaultTheme ? _defaultWarningColor : _pastelWarningColor;
+        return _pastelPrimaryColor;
-  Color get successColor => _currentTheme == ThemeType.defaultTheme ? _defaultSuccessColor : _pastelSuccessColor;
+      case ThemeType.darkTheme:
+        return _darkPrimaryColor;
+    }
+  }
+
+  Color get secondaryColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultSecondaryColor;
+      case ThemeType.pastelTheme:
+        return _pastelSecondaryColor;
+      case ThemeType.darkTheme:
+        return _darkSecondaryColor;
+    }
+  }
+
+  Color get backgroundColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultBackgroundColor;
+      case ThemeType.pastelTheme:
+        return _pastelBackgroundColor;
+      case ThemeType.darkTheme:
+        return _darkBackgroundColor;
+    }
+  }
+
+  Color get textColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultTextColor;
+      case ThemeType.pastelTheme:
+        return _pastelTextColor;
+      case ThemeType.darkTheme:
+        return _darkTextColor;
+    }
+  }
+
+  Color get errorColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultErrorColor;
+      case ThemeType.pastelTheme:
+        return _pastelErrorColor;
+      case ThemeType.darkTheme:
+        return _darkErrorColor;
+    }
+  }
+
+  Color get warningColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultWarningColor;
+      case ThemeType.pastelTheme:
+        return _pastelWarningColor;
+      case ThemeType.darkTheme:
+        return _darkWarningColor;
+    }
+  }
+
+  Color get successColor {
+    switch (_currentTheme) {
+      case ThemeType.defaultTheme:
+        return _defaultSuccessColor;
+      case ThemeType.pastelTheme:
+        return _pastelSuccessColor;
+      case ThemeType.darkTheme:
+        return _darkSuccessColor;
+    }
+  }
 
   // Méthode pour changer de thème
   void setTheme(ThemeType theme) {
@@ -51,40 +130,54 @@ class AppTheme extends ChangeNotifier {
 
   // Thème Material 3
   ThemeData get lightTheme {
+    return _buildTheme(_defaultPrimaryColor, _defaultSecondaryColor, _defaultBackgroundColor, _defaultTextColor, _defaultErrorColor, _defaultWarningColor, _defaultSuccessColor);
+  }
+
+  // Thème Material 3 pastel
+  ThemeData get pastelTheme {
+    return _buildTheme(_pastelPrimaryColor, _pastelSecondaryColor, _pastelBackgroundColor, _pastelTextColor, _pastelErrorColor, _pastelWarningColor, _pastelSuccessColor);
+  }
+
+  // Thème Material 3 sombre
+  ThemeData get darkTheme {
+    return _buildTheme(_darkPrimaryColor, _darkSecondaryColor, _darkBackgroundColor, _darkTextColor, _darkErrorColor, _darkWarningColor, _darkSuccessColor);
+  }
+
+  ThemeData _buildTheme(Color primary, Color secondary, Color background, Color text, Color error, Color warning, Color success) {
     return ThemeData(
       useMaterial3: true,
       colorScheme: ColorScheme.light(
-        primary: primaryColor,
+        primary: primary,
-        secondary: secondaryColor,
+        secondary: secondary,
-        background: backgroundColor,
+        background: background,
-        error: errorColor,
+        error: error,
-        tertiary: warningColor,
+        tertiary: warning,
         onPrimary: Colors.white,
         onSecondary: Colors.white,
-        onBackground: textColor,
+        onBackground: text,
         onError: Colors.white,
-        onTertiary: textColor,
+        onTertiary: text,
       ),
-      scaffoldBackgroundColor: backgroundColor,
+      scaffoldBackgroundColor: background,
       textTheme: TextTheme(
-        displayLarge: _getTitleStyle(32),
+        displayLarge: _getTitleStyle(32, text),
-        displayMedium: _getTitleStyle(28),
+        displayMedium: _getTitleStyle(28, text),
-        displaySmall: _getTitleStyle(24),
+        displaySmall: _getTitleStyle(24, text),
-        headlineMedium: _getTitleStyle(20),
+        headlineMedium: _getTitleStyle(20, text),
-        headlineSmall: _getTitleStyle(18),
+        headlineSmall: _getTitleStyle(18, text),
-        titleLarge: _getTitleStyle(16),
+        titleLarge: _getTitleStyle(16, text),
-        bodyLarge: _getBodyStyle(16),
+        bodyLarge: _getBodyStyle(16, text),
-        bodyMedium: _getBodyStyle(14),
+        bodyMedium: _getBodyStyle(14, text),
-        bodySmall: _getBodyStyle(12),
+        bodySmall: _getBodyStyle(12, text),
       ),
       appBarTheme: AppBarTheme(
-        backgroundColor: primaryColor,
+        backgroundColor: primary,
         foregroundColor: Colors.white,
-        titleTextStyle: _getTitleStyle(20).copyWith(color: Colors.white),
+        titleTextStyle: _getTitleStyle(20, Colors.white),
       ),
       elevatedButtonTheme: ElevatedButtonThemeData(
         style: ElevatedButton.styleFrom(
-          backgroundColor: primaryColor,
+          backgroundColor: primary,
           foregroundColor: Colors.white,
           padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
           shape: RoundedRectangleBorder(
@@ -94,7 +187,7 @@ class AppTheme extends ChangeNotifier {
       ),
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
-        fillColor: secondaryColor.withOpacity(0.5),
+        fillColor: secondary.withOpacity(0.5),
         border: OutlineInputBorder(
           borderRadius: BorderRadius.circular(8),
           borderSide: BorderSide.none,
@@ -105,31 +198,31 @@ class AppTheme extends ChangeNotifier {
         ),
         focusedBorder: OutlineInputBorder(
           borderRadius: BorderRadius.circular(8),
-          borderSide: BorderSide(color: primaryColor, width: 2),
+          borderSide: BorderSide(color: primary, width: 2),
         ),
         contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
       ),
       snackBarTheme: SnackBarThemeData(
-        backgroundColor: errorColor,
+        backgroundColor: error,
-        contentTextStyle: _getBodyStyle(14).copyWith(color: Colors.white),
+        contentTextStyle: _getBodyStyle(14, Colors.white),
       ),
     );
   }
 
   // Méthodes privées pour la typographie
-  TextStyle _getTitleStyle(double fontSize) {
+  TextStyle _getTitleStyle(double fontSize, Color color) {
     return GoogleFonts.merienda(
       fontSize: fontSize,
       fontWeight: FontWeight.w600,
-      color: textColor,
+      color: color,
     );
   }
 
-  TextStyle _getBodyStyle(double fontSize) {
+  TextStyle _getBodyStyle(double fontSize, Color color) {
     return GoogleFonts.merriweather(
       fontSize: fontSize,
       fontWeight: FontWeight.w300,
-      color: textColor,
+      color: color,
     );
   }
 } 

frontend/lib/theme/theme_provider.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'app_theme.dart';
+
+class ThemeProvider with ChangeNotifier {
+  ThemeType _currentTheme = ThemeType.defaultTheme;
+  static const String _themeKey = 'theme_type';
+
+  ThemeType get currentTheme => _currentTheme;
+
+  ThemeProvider() {
+    _loadTheme();
+  }
+
+  Future<void> _loadTheme() async {
+    final prefs = await SharedPreferences.getInstance();
+    final themeIndex = prefs.getInt(_themeKey) ?? 0;
+    _currentTheme = ThemeType.values[themeIndex];
+    notifyListeners();
+  }
+
+  Future<void> setTheme(ThemeType theme) async {
+    _currentTheme = theme;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt(_themeKey, theme.index);
+    notifyListeners();
+  }
+
+  bool get isDarkMode => _currentTheme == ThemeType.darkTheme;
+}