feat: multiple theming options (#50)

* refactor: consolidate theme definitions by removing separate dark and light theme files

* feat: integrate dynamic color support and enhance theme settings management

* feat: add theme settings route and update theme management in app settings

* feat: enhance theme management by integrating high contrast support in various components

* feat: implement mode selection dialog for theme settings and enhance button functionality

* refactor: update theme import paths and consolidate theme provider files

* feat: enhance theme management by integrating theme selection based on audiobook playback

* refactor: update default value for useMaterialThemeFromSystem to false in theme settings

* refactor: adjust high contrast condition order in theme settings for consistency

* refactor: rename useMaterialThemeOfPlayingItem to useCurrentPlayerThemeThroughoutApp for clarity

* refactor: correct spelling in system theme provider and replace with updated implementation

* refactor: extract restore backup dialog into a separate widget for improved readability

* refactor: reorganize settings sections for clarity and improve restore dialog functionality

lib/main.dart

@@ -1,3 +1,4 @@
+import 'package:dynamic_color/dynamic_color.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:logging/logging.dart';
@@ -7,12 +8,15 @@ import 'package:vaani/features/downloads/providers/download_manager.dart';
 import 'package:vaani/features/logging/core/logger.dart';
 import 'package:vaani/features/playback_reporting/providers/playback_reporter_provider.dart';
 import 'package:vaani/features/player/core/init.dart';
-import 'package:vaani/features/player/providers/audiobook_player.dart';
+import 'package:vaani/features/player/providers/audiobook_player.dart'
+    show audiobookPlayerProvider, simpleAudiobookPlayerProvider;
 import 'package:vaani/features/shake_detection/providers/shake_detector.dart';
 import 'package:vaani/features/sleep_timer/providers/sleep_timer_provider.dart';
 import 'package:vaani/router/router.dart';
 import 'package:vaani/settings/api_settings_provider.dart';
 import 'package:vaani/settings/app_settings_provider.dart';
+import 'package:vaani/theme/providers/system_theme_provider.dart';
+import 'package:vaani/theme/providers/theme_from_cover_provider.dart';
 import 'package:vaani/theme/theme.dart';
 
 final appLogger = Logger('vaani');
@@ -51,16 +55,77 @@ class MyApp extends ConsumerWidget {
     if (needOnboarding) {
       routerConfig.goNamed(Routes.onboarding.name);
     }
+    final appSettings = ref.watch(appSettingsProvider);
+    final themeSettings = appSettings.themeSettings;
 
+    ColorScheme lightColorScheme = brandLightColorScheme;
+    ColorScheme darkColorScheme = brandDarkColorScheme;
+
+    final shouldUseHighContrast =
+        themeSettings.highContrast || MediaQuery.of(context).highContrast;
+
+    if (shouldUseHighContrast) {
+      lightColorScheme = lightColorScheme.copyWith(
+        surface: Colors.white,
+      );
+      darkColorScheme = darkColorScheme.copyWith(
+        surface: Colors.black,
+      );
+    }
+
+    if (themeSettings.useMaterialThemeFromSystem) {
+      var themes =
+          ref.watch(systemThemeProvider(highContrast: shouldUseHighContrast));
+      if (themes.valueOrNull != null) {
+        lightColorScheme = themes.valueOrNull!.$1;
+        darkColorScheme = themes.valueOrNull!.$2;
+      }
+    }
+
+    if (themeSettings.useCurrentPlayerThemeThroughoutApp) {
+      final player = ref.watch(audiobookPlayerProvider);
+      if (player.book != null) {
+        final themeLight = ref.watch(
+          themeOfLibraryItemProvider(
+            player.book!.libraryItemId,
+            highContrast: shouldUseHighContrast,
+            brightness: Brightness.light,
+          ),
+        );
+        final themeDark = ref.watch(
+          themeOfLibraryItemProvider(
+            player.book!.libraryItemId,
+            highContrast: shouldUseHighContrast,
+            brightness: Brightness.dark,
+          ),
+        );
+        if (themeLight.valueOrNull != null && themeDark.valueOrNull != null) {
+          lightColorScheme = themeLight.valueOrNull!;
+          darkColorScheme = themeDark.valueOrNull!;
+        }
+      }
+    }
+    final appThemeLight = ThemeData(
+      useMaterial3: true,
+      colorScheme: lightColorScheme.harmonized(),
+    );
+    final appThemeDark = ThemeData(
+      useMaterial3: true,
+      colorScheme: darkColorScheme.harmonized(),
+      brightness: Brightness.dark,
+      // TODO bottom sheet theme is not working
+      bottomSheetTheme: BottomSheetThemeData(
+        backgroundColor: darkColorScheme.surface,
+      ),
+    );
     try {
       return MaterialApp.router(
         // debugShowCheckedModeBanner: false,
-        theme: lightTheme,
-        darkTheme: darkTheme,
-        themeMode: ref.watch(appSettingsProvider).themeSettings.isDarkMode
-            ? ThemeMode.dark
-            : ThemeMode.light,
+        theme: appThemeLight,
+        darkTheme: appThemeDark,
+        themeMode: themeSettings.themeMode,
         routerConfig: routerConfig,
+        themeAnimationCurve: Curves.easeInOut,
       );
     } catch (e) {
       debugPrintStack(stackTrace: StackTrace.current, label: e.toString());