/// Thème Sophistiqué UnionFlow — Material Design 3
///
/// Palette WCAG 2.1 validée : #2563EB (primary) + #7616E8 (accent)
library app_theme_sophisticated;

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import '../tokens/color_tokens.dart';
import '../tokens/typography_tokens.dart';
import '../tokens/spacing_tokens.dart';

class AppThemeSophisticated {
  AppThemeSophisticated._();

  // ═══════════════════════════════════════════════════════════════════════════
  // THÈME CLAIR
  // ═══════════════════════════════════════════════════════════════════════════

  static ThemeData get lightTheme {
    return ThemeData(
      useMaterial3: true,
      brightness: Brightness.light,
      colorScheme: _lightColorScheme,
      textTheme: _textTheme,
      appBarTheme: _appBarTheme,
      cardTheme: _cardTheme,
      elevatedButtonTheme: _elevatedButtonTheme,
      filledButtonTheme: _filledButtonTheme,
      outlinedButtonTheme: _outlinedButtonTheme,
      textButtonTheme: _textButtonTheme,
      inputDecorationTheme: _inputDecorationTheme,
      navigationBarTheme: _navigationBarTheme,
      navigationDrawerTheme: _navigationDrawerTheme,
      dialogTheme: _dialogTheme,
      snackBarTheme: _snackBarTheme,
      chipTheme: _chipTheme,
      listTileTheme: _listTileTheme,
      tabBarTheme: _tabBarTheme,
      dividerTheme: _dividerTheme,
      iconTheme: _iconTheme,
      scaffoldBackgroundColor: ColorTokens.background,
      canvasColor: ColorTokens.surface,
      pageTransitionsTheme: _pageTransitionsTheme,
      extensions: const [_customColors, _customSpacing],
    );
  }

  // ═══════════════════════════════════════════════════════════════════════════
  // THÈME SOMBRE — Navy Profond (#0A0D1A)
  // ═══════════════════════════════════════════════════════════════════════════

  static ThemeData get darkTheme {
    return ThemeData(
      useMaterial3: true,
      brightness: Brightness.dark,
      colorScheme: _darkColorScheme,
      textTheme: _textThemeDark,
      scaffoldBackgroundColor: ColorTokens.backgroundDark,
      canvasColor: ColorTokens.surfaceDark,
      appBarTheme: const AppBarTheme(
        elevation: 0,
        scrolledUnderElevation: 0,
        backgroundColor: Colors.transparent,
        foregroundColor: ColorTokens.onSurfaceDark,
        surfaceTintColor: Colors.transparent,
        systemOverlayStyle: SystemUiOverlayStyle(
          statusBarColor: Colors.transparent,
          statusBarIconBrightness: Brightness.light, // icônes blanches en dark
          statusBarBrightness: Brightness.dark,      // pour iOS
          systemNavigationBarColor: Colors.transparent,
        ),
      ),
      dividerTheme: const DividerThemeData(
        color: ColorTokens.outlineDark,
        thickness: 1.0,
        space: SpacingTokens.md,
      ),
      cardTheme: CardThemeData(
        color: ColorTokens.surfaceDark,
        elevation: 0,
        shadowColor: Colors.transparent,
        surfaceTintColor: Colors.transparent,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusLg),
          side: const BorderSide(color: ColorTokens.outlineDark),
        ),
        margin: const EdgeInsets.all(SpacingTokens.cardMargin),
      ),
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          elevation: SpacingTokens.elevationSm,
          backgroundColor: ColorTokens.primaryLight,
          foregroundColor: ColorTokens.onPrimaryContainer,
          textStyle: TypographyTokens.buttonMedium,
          padding: const EdgeInsets.symmetric(
            horizontal: SpacingTokens.buttonPaddingHorizontal,
            vertical: SpacingTokens.buttonPaddingVertical,
          ),
          minimumSize: const Size(SpacingTokens.minButtonWidth, SpacingTokens.buttonHeightMedium),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          ),
        ),
      ),
      filledButtonTheme: FilledButtonThemeData(
        style: FilledButton.styleFrom(
          backgroundColor: ColorTokens.primaryLight,
          foregroundColor: ColorTokens.onPrimaryContainer,
          textStyle: TypographyTokens.buttonMedium,
          padding: const EdgeInsets.symmetric(
            horizontal: SpacingTokens.buttonPaddingHorizontal,
            vertical: SpacingTokens.buttonPaddingVertical,
          ),
          minimumSize: const Size(SpacingTokens.minButtonWidth, SpacingTokens.buttonHeightMedium),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          ),
        ),
      ),
      outlinedButtonTheme: OutlinedButtonThemeData(
        style: OutlinedButton.styleFrom(
          foregroundColor: ColorTokens.primaryLight,
          textStyle: TypographyTokens.buttonMedium,
          padding: const EdgeInsets.symmetric(
            horizontal: SpacingTokens.buttonPaddingHorizontal,
            vertical: SpacingTokens.buttonPaddingVertical,
          ),
          minimumSize: const Size(SpacingTokens.minButtonWidth, SpacingTokens.buttonHeightMedium),
          side: const BorderSide(color: ColorTokens.outlineDark),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          ),
        ),
      ),
      textButtonTheme: TextButtonThemeData(
        style: TextButton.styleFrom(
          foregroundColor: ColorTokens.primaryLight,
          textStyle: TypographyTokens.buttonMedium,
          padding: const EdgeInsets.symmetric(
            horizontal: SpacingTokens.buttonPaddingHorizontal,
            vertical: SpacingTokens.buttonPaddingVertical,
          ),
          minimumSize: const Size(SpacingTokens.minButtonWidth, SpacingTokens.buttonHeightMedium),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          ),
        ),
      ),
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: ColorTokens.surfaceContainerDark,
        labelStyle: TypographyTokens.inputLabel.copyWith(
          color: ColorTokens.onSurfaceVariantDark,
        ),
        hintStyle: TypographyTokens.inputHint.copyWith(
          color: ColorTokens.onSurfaceVariantDark,
        ),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          borderSide: const BorderSide(color: ColorTokens.outlineDark),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          borderSide: const BorderSide(color: ColorTokens.outlineDark),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          borderSide: const BorderSide(color: ColorTokens.primaryLight, width: 2.0),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
          borderSide: const BorderSide(color: ColorTokens.error),
        ),
        contentPadding: const EdgeInsets.all(SpacingTokens.formPadding),
      ),
      navigationBarTheme: NavigationBarThemeData(
        backgroundColor: ColorTokens.navigationBackgroundDark,
        indicatorColor: ColorTokens.navigationIndicatorDark,
        labelTextStyle: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return TypographyTokens.navigationLabelSelected.copyWith(
              color: ColorTokens.navigationSelectedDark,
            );
          }
          return TypographyTokens.navigationLabel.copyWith(
            color: ColorTokens.navigationUnselectedDark,
          );
        }),
        iconTheme: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return const IconThemeData(color: ColorTokens.navigationSelectedDark);
          }
          return const IconThemeData(color: ColorTokens.navigationUnselectedDark);
        }),
      ),
      navigationDrawerTheme: NavigationDrawerThemeData(
        backgroundColor: ColorTokens.surfaceContainerDark,
        elevation: SpacingTokens.elevationMd,
        shadowColor: Colors.black,
        surfaceTintColor: Colors.transparent,
        indicatorColor: ColorTokens.navigationIndicatorDark,
        labelTextStyle: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return TypographyTokens.navigationLabelSelected.copyWith(
              color: ColorTokens.navigationSelectedDark,
            );
          }
          return TypographyTokens.navigationLabel.copyWith(
            color: ColorTokens.navigationUnselectedDark,
          );
        }),
      ),
      dialogTheme: DialogThemeData(
        backgroundColor: ColorTokens.surfaceDark,
        elevation: SpacingTokens.elevationLg,
        surfaceTintColor: Colors.transparent,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusXl),
        ),
        titleTextStyle: TypographyTokens.headlineSmall.copyWith(
          color: ColorTokens.onSurfaceDark,
        ),
        contentTextStyle: TypographyTokens.bodyMedium.copyWith(
          color: ColorTokens.onSurfaceVariantDark,
        ),
      ),
      snackBarTheme: SnackBarThemeData(
        backgroundColor: ColorTokens.surfaceVariantDark,
        contentTextStyle: TypographyTokens.bodyMedium.copyWith(
          color: ColorTokens.onSurfaceDark,
        ),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
        ),
        behavior: SnackBarBehavior.fixed,
      ),
      chipTheme: ChipThemeData(
        backgroundColor: ColorTokens.surfaceContainerDark,
        selectedColor: ColorTokens.navigationIndicatorDark,
        labelStyle: TypographyTokens.labelMedium.copyWith(
          color: ColorTokens.onSurfaceDark,
        ),
        padding: const EdgeInsets.symmetric(
          horizontal: SpacingTokens.md,
          vertical: SpacingTokens.sm,
        ),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
        ),
      ),
      listTileTheme: ListTileThemeData(
        contentPadding: const EdgeInsets.symmetric(
          horizontal: SpacingTokens.xl,
          vertical: SpacingTokens.md,
        ),
        tileColor: ColorTokens.surfaceDark,
        titleTextStyle: TypographyTokens.titleMedium.copyWith(
          color: ColorTokens.onSurfaceDark,
        ),
        subtitleTextStyle: TypographyTokens.bodyMedium.copyWith(
          color: ColorTokens.onSurfaceVariantDark,
        ),
        minVerticalPadding: SpacingTokens.md,
      ),
      tabBarTheme: TabBarThemeData(
        labelColor: ColorTokens.primaryLight,
        unselectedLabelColor: ColorTokens.onSurfaceVariantDark,
        labelStyle: TypographyTokens.titleSmall,
        unselectedLabelStyle: TypographyTokens.titleSmall,
        indicator: UnderlineTabIndicator(
          borderSide: const BorderSide(color: ColorTokens.primaryLight, width: 2.0),
          borderRadius: BorderRadius.circular(SpacingTokens.radiusXs),
        ),
      ),
      iconTheme: const IconThemeData(
        color: ColorTokens.onSurfaceVariantDark,
        size: 24.0,
      ),
      pageTransitionsTheme: _pageTransitionsTheme,
      extensions: const [_customColors, _customSpacing],
    );
  }

  // ═══════════════════════════════════════════════════════════════════════════
  // COLOR SCHEME SOMBRE — Navy profond OLED
  // ═══════════════════════════════════════════════════════════════════════════

  static const ColorScheme _darkColorScheme = ColorScheme.dark(
    primary: ColorTokens.primaryLight,            // #60A5FA sur fond sombre
    onPrimary: ColorTokens.onPrimaryContainer,    // #1E3A8A
    primaryContainer: ColorTokens.navigationIndicatorDark, // #1A2350
    onPrimaryContainer: Color(0xFFD6E8FF),
    secondary: ColorTokens.secondaryLight,        // #9B59F0
    onSecondary: ColorTokens.onSecondaryContainer, // #2A006F
    secondaryContainer: Color(0xFF3B1F6A),
    onSecondaryContainer: Color(0xFFEAD5FF),
    surface: ColorTokens.surfaceDark,             // #161B26
    onSurface: ColorTokens.onSurfaceDark,         // #F1F5FF
    surfaceContainerHighest: ColorTokens.surfaceVariantDark, // #1A1F2E
    onSurfaceVariant: ColorTokens.onSurfaceVariantDark,      // #94A3B8
    error: ColorTokens.error,
    onError: Colors.white,
    errorContainer: Color(0xFF5C1111),
    onErrorContainer: ColorTokens.errorLight,
    outline: ColorTokens.outlineDark,             // #2D3554
    outlineVariant: Color(0xFF1F2B3E),
    shadow: ColorTokens.backgroundDark,
    scrim: Colors.black,
    inverseSurface: ColorTokens.onSurfaceDark,
    onInverseSurface: ColorTokens.surfaceDark,
    inversePrimary: ColorTokens.primary,
  );

  // ═══════════════════════════════════════════════════════════════════════════
  // COLOR SCHEME CLAIR
  // ═══════════════════════════════════════════════════════════════════════════

  static const ColorScheme _lightColorScheme = ColorScheme.light(
    primary: ColorTokens.primary,
    onPrimary: ColorTokens.onPrimary,
    primaryContainer: ColorTokens.primaryContainer,
    onPrimaryContainer: ColorTokens.onPrimaryContainer,
    secondary: ColorTokens.secondary,
    onSecondary: ColorTokens.onSecondary,
    secondaryContainer: ColorTokens.secondaryContainer,
    onSecondaryContainer: ColorTokens.onSecondaryContainer,
    tertiary: ColorTokens.tertiary,
    onTertiary: ColorTokens.onTertiary,
    tertiaryContainer: ColorTokens.tertiaryContainer,
    onTertiaryContainer: ColorTokens.onTertiaryContainer,
    error: ColorTokens.error,
    onError: ColorTokens.onError,
    errorContainer: ColorTokens.errorContainer,
    onErrorContainer: ColorTokens.onErrorContainer,
    surface: ColorTokens.surface,
    onSurface: ColorTokens.onSurface,
    surfaceContainerHighest: ColorTokens.surfaceVariant,
    onSurfaceVariant: ColorTokens.onSurfaceVariant,
    outline: ColorTokens.outline,
    outlineVariant: ColorTokens.outlineVariant,
    shadow: ColorTokens.shadow,
    scrim: ColorTokens.shadow,
    inverseSurface: ColorTokens.onSurface,
    onInverseSurface: ColorTokens.surface,
    inversePrimary: ColorTokens.primaryLight,
  );

  // ═══════════════════════════════════════════════════════════════════════════
  // TYPOGRAPHIE
  // ═══════════════════════════════════════════════════════════════════════════

  static TextTheme get _textTheme => TextTheme(
    displayLarge: TypographyTokens.displayLarge,
    displayMedium: TypographyTokens.displayMedium,
    displaySmall: TypographyTokens.displaySmall,
    headlineLarge: TypographyTokens.headlineLarge,
    headlineMedium: TypographyTokens.headlineMedium,
    headlineSmall: TypographyTokens.headlineSmall,
    titleLarge: TypographyTokens.titleLarge,
    titleMedium: TypographyTokens.titleMedium,
    titleSmall: TypographyTokens.titleSmall,
    labelLarge: TypographyTokens.labelLarge,
    labelMedium: TypographyTokens.labelMedium,
    labelSmall: TypographyTokens.labelSmall,
    bodyLarge: TypographyTokens.bodyLarge,
    bodyMedium: TypographyTokens.bodyMedium,
    bodySmall: TypographyTokens.bodySmall,
  );

  /// Thème typographique dark — même structure que _textTheme mais avec
  /// ColorTokens.onSurfaceDark (#F1F5FF) pour que le texte soit lisible
  /// sur les fonds sombres (#0A0D1A / #161B26).
  static TextTheme get _textThemeDark => TextTheme(
    displayLarge: TypographyTokens.displayLarge.copyWith(color: ColorTokens.onSurfaceDark),
    displayMedium: TypographyTokens.displayMedium.copyWith(color: ColorTokens.onSurfaceDark),
    displaySmall: TypographyTokens.displaySmall.copyWith(color: ColorTokens.onSurfaceDark),
    headlineLarge: TypographyTokens.headlineLarge.copyWith(color: ColorTokens.onSurfaceDark),
    headlineMedium: TypographyTokens.headlineMedium.copyWith(color: ColorTokens.onSurfaceDark),
    headlineSmall: TypographyTokens.headlineSmall.copyWith(color: ColorTokens.onSurfaceDark),
    titleLarge: TypographyTokens.titleLarge.copyWith(color: ColorTokens.onSurfaceDark),
    titleMedium: TypographyTokens.titleMedium.copyWith(color: ColorTokens.onSurfaceDark),
    titleSmall: TypographyTokens.titleSmall.copyWith(color: ColorTokens.onSurfaceDark),
    labelLarge: TypographyTokens.labelLarge.copyWith(color: ColorTokens.onSurfaceDark),
    labelMedium: TypographyTokens.labelMedium.copyWith(color: ColorTokens.onSurfaceDark),
    labelSmall: TypographyTokens.labelSmall.copyWith(color: ColorTokens.onSurfaceDark),
    bodyLarge: TypographyTokens.bodyLarge.copyWith(color: ColorTokens.onSurfaceDark),
    bodyMedium: TypographyTokens.bodyMedium.copyWith(color: ColorTokens.onSurfaceDark),
    bodySmall: TypographyTokens.bodySmall.copyWith(color: ColorTokens.onSurfaceDark),
  );

  // ═══════════════════════════════════════════════════════════════════════════
  // COMPOSANTS
  // ═══════════════════════════════════════════════════════════════════════════

  static const AppBarTheme _appBarTheme = AppBarTheme(
    elevation: 0,
    scrolledUnderElevation: 0,
    backgroundColor: Colors.transparent,
    foregroundColor: ColorTokens.onSurface,
    surfaceTintColor: Colors.transparent,
    systemOverlayStyle: SystemUiOverlayStyle(
      statusBarColor: Colors.transparent,
      statusBarIconBrightness: Brightness.dark,
      statusBarBrightness: Brightness.light,
    ),
  );

  static final CardThemeData _cardTheme = CardThemeData(
    elevation: SpacingTokens.elevationSm,
    shadowColor: ColorTokens.shadow,
    surfaceTintColor: Colors.transparent,
    color: ColorTokens.surface,
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusLg),
      side: const BorderSide(color: ColorTokens.outline),
    ),
    margin: const EdgeInsets.all(SpacingTokens.cardMargin),
  );

  static final ElevatedButtonThemeData _elevatedButtonTheme =
      ElevatedButtonThemeData(
    style: ElevatedButton.styleFrom(
      elevation: SpacingTokens.elevationSm,
      shadowColor: ColorTokens.shadow,
      backgroundColor: ColorTokens.primary,
      foregroundColor: ColorTokens.onPrimary,
      textStyle: TypographyTokens.buttonMedium,
      padding: const EdgeInsets.symmetric(
        horizontal: SpacingTokens.buttonPaddingHorizontal,
        vertical: SpacingTokens.buttonPaddingVertical,
      ),
      minimumSize: const Size(
        SpacingTokens.minButtonWidth,
        SpacingTokens.buttonHeightMedium,
      ),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      ),
    ),
  );

  static final FilledButtonThemeData _filledButtonTheme =
      FilledButtonThemeData(
    style: FilledButton.styleFrom(
      backgroundColor: ColorTokens.primary,
      foregroundColor: ColorTokens.onPrimary,
      textStyle: TypographyTokens.buttonMedium,
      padding: const EdgeInsets.symmetric(
        horizontal: SpacingTokens.buttonPaddingHorizontal,
        vertical: SpacingTokens.buttonPaddingVertical,
      ),
      minimumSize: const Size(
        SpacingTokens.minButtonWidth,
        SpacingTokens.buttonHeightMedium,
      ),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      ),
    ),
  );

  static final OutlinedButtonThemeData _outlinedButtonTheme =
      OutlinedButtonThemeData(
    style: OutlinedButton.styleFrom(
      foregroundColor: ColorTokens.primary,
      textStyle: TypographyTokens.buttonMedium,
      padding: const EdgeInsets.symmetric(
        horizontal: SpacingTokens.buttonPaddingHorizontal,
        vertical: SpacingTokens.buttonPaddingVertical,
      ),
      minimumSize: const Size(
        SpacingTokens.minButtonWidth,
        SpacingTokens.buttonHeightMedium,
      ),
      side: const BorderSide(color: ColorTokens.outline),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      ),
    ),
  );

  static final TextButtonThemeData _textButtonTheme = TextButtonThemeData(
    style: TextButton.styleFrom(
      foregroundColor: ColorTokens.primary,
      textStyle: TypographyTokens.buttonMedium,
      padding: const EdgeInsets.symmetric(
        horizontal: SpacingTokens.buttonPaddingHorizontal,
        vertical: SpacingTokens.buttonPaddingVertical,
      ),
      minimumSize: const Size(
        SpacingTokens.minButtonWidth,
        SpacingTokens.buttonHeightMedium,
      ),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      ),
    ),
  );

  static final InputDecorationTheme _inputDecorationTheme =
      InputDecorationTheme(
    filled: true,
    fillColor: ColorTokens.surfaceContainer,
    labelStyle: TypographyTokens.inputLabel,
    hintStyle: TypographyTokens.inputHint,
    border: OutlineInputBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      borderSide: const BorderSide(color: ColorTokens.outline),
    ),
    enabledBorder: OutlineInputBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      borderSide: const BorderSide(color: ColorTokens.outline),
    ),
    focusedBorder: OutlineInputBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      borderSide: const BorderSide(color: ColorTokens.primary, width: 2.0),
    ),
    errorBorder: OutlineInputBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
      borderSide: const BorderSide(color: ColorTokens.error),
    ),
    contentPadding: const EdgeInsets.all(SpacingTokens.formPadding),
  );

  static final NavigationBarThemeData _navigationBarTheme =
      NavigationBarThemeData(
    backgroundColor: ColorTokens.navigationBackground,
    indicatorColor: ColorTokens.navigationIndicator,
    labelTextStyle: WidgetStateProperty.resolveWith((states) {
      if (states.contains(WidgetState.selected)) {
        return TypographyTokens.navigationLabelSelected;
      }
      return TypographyTokens.navigationLabel;
    }),
    iconTheme: WidgetStateProperty.resolveWith((states) {
      if (states.contains(WidgetState.selected)) {
        return const IconThemeData(color: ColorTokens.navigationSelected);
      }
      return const IconThemeData(color: ColorTokens.navigationUnselected);
    }),
  );

  static final NavigationDrawerThemeData _navigationDrawerTheme =
      NavigationDrawerThemeData(
    backgroundColor: ColorTokens.surfaceContainer,
    elevation: SpacingTokens.elevationMd,
    shadowColor: ColorTokens.shadow,
    surfaceTintColor: Colors.transparent,
    indicatorColor: ColorTokens.primaryContainer,
    labelTextStyle: WidgetStateProperty.resolveWith((states) {
      if (states.contains(WidgetState.selected)) {
        return TypographyTokens.navigationLabelSelected;
      }
      return TypographyTokens.navigationLabel;
    }),
  );

  static final DialogThemeData _dialogTheme = DialogThemeData(
    backgroundColor: ColorTokens.surface,
    elevation: SpacingTokens.elevationLg,
    shadowColor: ColorTokens.shadow,
    surfaceTintColor: Colors.transparent,
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusXl),
    ),
    titleTextStyle: TypographyTokens.headlineSmall,
    contentTextStyle: TypographyTokens.bodyMedium,
  );

  static final SnackBarThemeData _snackBarTheme = SnackBarThemeData(
    backgroundColor: ColorTokens.onSurface,
    contentTextStyle: TypographyTokens.bodyMedium.copyWith(
      color: ColorTokens.surface,
    ),
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
    ),
    behavior: SnackBarBehavior.fixed,
  );

  static final ChipThemeData _chipTheme = ChipThemeData(
    backgroundColor: ColorTokens.surfaceVariant,
    selectedColor: ColorTokens.primaryContainer,
    labelStyle: TypographyTokens.labelMedium,
    padding: const EdgeInsets.symmetric(
      horizontal: SpacingTokens.md,
      vertical: SpacingTokens.sm,
    ),
    shape: RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(SpacingTokens.radiusMd),
    ),
  );

  static const ListTileThemeData _listTileTheme = ListTileThemeData(
    contentPadding: EdgeInsets.symmetric(
      horizontal: SpacingTokens.xl,
      vertical: SpacingTokens.md,
    ),
    titleTextStyle: TypographyTokens.titleMedium,
    subtitleTextStyle: TypographyTokens.bodyMedium,
    leadingAndTrailingTextStyle: TypographyTokens.labelMedium,
    minVerticalPadding: SpacingTokens.md,
  );

  static final TabBarThemeData _tabBarTheme = TabBarThemeData(
    labelColor: ColorTokens.primary,
    unselectedLabelColor: ColorTokens.onSurfaceVariant,
    labelStyle: TypographyTokens.titleSmall,
    unselectedLabelStyle: TypographyTokens.titleSmall,
    indicator: UnderlineTabIndicator(
      borderSide: const BorderSide(
        color: ColorTokens.primary,
        width: 2.0,
      ),
      borderRadius: BorderRadius.circular(SpacingTokens.radiusXs),
    ),
  );

  static const DividerThemeData _dividerTheme = DividerThemeData(
    color: ColorTokens.outline,
    thickness: 1.0,
    space: SpacingTokens.md,
  );

  static const IconThemeData _iconTheme = IconThemeData(
    color: ColorTokens.onSurfaceVariant,
    size: 24.0,
  );

  static const PageTransitionsTheme _pageTransitionsTheme =
      PageTransitionsTheme(
    builders: {
      TargetPlatform.android: CupertinoPageTransitionsBuilder(),
      TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
    },
  );

  static const CustomColors _customColors = CustomColors();
  static const CustomSpacing _customSpacing = CustomSpacing();
}

class CustomColors extends ThemeExtension<CustomColors> {
  const CustomColors();
  @override
  CustomColors copyWith() => const CustomColors();
  @override
  CustomColors lerp(ThemeExtension<CustomColors>? other, double t) =>
      const CustomColors();
}

class CustomSpacing extends ThemeExtension<CustomSpacing> {
  const CustomSpacing();
  @override
  CustomSpacing copyWith() => const CustomSpacing();
  @override
  CustomSpacing lerp(ThemeExtension<CustomSpacing>? other, double t) =>
      const CustomSpacing();
}