added 2 themes

frontend_splatournament_manager/lib/providers/theme_provider.dart

@@ -1,11 +1,50 @@
 import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-class ThemeProvider extends ChangeNotifier {
-  static const String _themeKey = 'theme_mode';
-  ThemeMode _themeMode = ThemeMode.system;
+enum AppThemeOption { lightBlue, darkPurple, lightMint, darkAmber, system }
 
-  ThemeMode get theme => _themeMode;
+class ThemeProvider extends ChangeNotifier {
+  static const String _themeKey = 'theme_option';
+  AppThemeOption _selectedTheme = AppThemeOption.system;
+
+  AppThemeOption get selectedTheme => _selectedTheme;
+
+  ThemeMode get themeMode {
+    switch (_selectedTheme) {
+      case AppThemeOption.lightBlue:
+      case AppThemeOption.lightMint:
+        return ThemeMode.light;
+      case AppThemeOption.darkPurple:
+      case AppThemeOption.darkAmber:
+        return ThemeMode.dark;
+      case AppThemeOption.system:
+        return ThemeMode.system;
+    }
+  }
+
+  ThemeData get lightTheme {
+    switch (_selectedTheme) {
+      case AppThemeOption.lightMint:
+        return _mintLightTheme;
+      case AppThemeOption.lightBlue:
+      case AppThemeOption.darkPurple:
+      case AppThemeOption.darkAmber:
+      case AppThemeOption.system:
+        return _blueLightTheme;
+    }
+  }
+
+  ThemeData get darkTheme {
+    switch (_selectedTheme) {
+      case AppThemeOption.darkAmber:
+        return _amberDarkTheme;
+      case AppThemeOption.lightBlue:
+      case AppThemeOption.darkPurple:
+      case AppThemeOption.lightMint:
+      case AppThemeOption.system:
+        return _purpleDarkTheme;
+    }
+  }
 
   ThemeProvider() {
     _loadTheme();
@@ -14,38 +53,116 @@ class ThemeProvider extends ChangeNotifier {
   Future<void> _loadTheme() async {
     final prefs = await SharedPreferences.getInstance();
     final themeName = prefs.getString(_themeKey) ?? 'system';
-    _themeMode = _themeFromString(themeName);
+    _selectedTheme = _themeFromString(themeName);
     notifyListeners();
   }
 
-  Future<void> setTheme(ThemeMode mode) async {
-    _themeMode = mode;
+  Future<void> setTheme(AppThemeOption option) async {
+    _selectedTheme = option;
     notifyListeners();
-    
+
     final prefs = await SharedPreferences.getInstance();
-    await prefs.setString(_themeKey, _themeToString(mode));
+    await prefs.setString(_themeKey, _themeToString(option));
   }
 
-  String _themeToString(ThemeMode mode) {
-    switch (mode) {
-      case ThemeMode.light:
-        return 'light';
-      case ThemeMode.dark:
-        return 'dark';
-      case ThemeMode.system:
+  String _themeToString(AppThemeOption option) {
+    switch (option) {
+      case AppThemeOption.lightBlue:
+        return 'light_blue';
+      case AppThemeOption.darkPurple:
+        return 'dark_purple';
+      case AppThemeOption.lightMint:
+        return 'light_mint';
+      case AppThemeOption.darkAmber:
+        return 'dark_amber';
+      case AppThemeOption.system:
         return 'system';
     }
   }
 
-  ThemeMode _themeFromString(String theme) {
+  AppThemeOption _themeFromString(String theme) {
     switch (theme) {
       case 'light':
-        return ThemeMode.light;
+      case 'light_blue':
+        return AppThemeOption.lightBlue;
       case 'dark':
-        return ThemeMode.dark;
+      case 'dark_purple':
+        return AppThemeOption.darkPurple;
+      case 'light_mint':
+        return AppThemeOption.lightMint;
+      case 'dark_amber':
+        return AppThemeOption.darkAmber;
       case 'system':
       default:
-        return ThemeMode.system;
+        return AppThemeOption.system;
     }
   }
-}
+
+  ThemeData get _blueLightTheme {
+    final scheme = ColorScheme.fromSeed(
+      seedColor: Colors.blue,
+      brightness: Brightness.light,
+    );
+    return ThemeData(
+      colorScheme: scheme,
+      useMaterial3: true,
+      appBarTheme: AppBarTheme(
+        backgroundColor: scheme.primary,
+        foregroundColor: scheme.onPrimary,
+      ),
+    );
+  }
+
+  ThemeData get _purpleDarkTheme {
+    final scheme = ColorScheme.fromSeed(
+      seedColor: Colors.deepPurple,
+      brightness: Brightness.dark,
+    );
+    return ThemeData(
+      colorScheme: scheme,
+      useMaterial3: true,
+      appBarTheme: AppBarTheme(
+        backgroundColor: scheme.surface,
+        foregroundColor: scheme.onSurface,
+      ),
+    );
+  }
+
+  ThemeData get _mintLightTheme {
+    final scheme = ColorScheme.fromSeed(
+      seedColor: const Color(0xFF00897B),
+      brightness: Brightness.light,
+    );
+    return ThemeData(
+      colorScheme: scheme,
+      useMaterial3: true,
+      appBarTheme: AppBarTheme(
+        backgroundColor: scheme.primary,
+        foregroundColor: scheme.onPrimary,
+      ),
+      floatingActionButtonTheme: FloatingActionButtonThemeData(
+        backgroundColor: scheme.secondary,
+        foregroundColor: scheme.onSecondary,
+      ),
+    );
+  }
+
+  ThemeData get _amberDarkTheme {
+    final scheme = ColorScheme.fromSeed(
+      seedColor: const Color(0xFFFF8F00),
+      brightness: Brightness.dark,
+    );
+    return ThemeData(
+      colorScheme: scheme,
+      useMaterial3: true,
+      appBarTheme: AppBarTheme(
+        backgroundColor: scheme.surface,
+        foregroundColor: scheme.onSurface,
+      ),
+      floatingActionButtonTheme: FloatingActionButtonThemeData(
+        backgroundColor: scheme.primary,
+        foregroundColor: scheme.onPrimary,
+      ),
+    );
+  }
+}