import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'package:worker/core/theme/colors.dart';
import 'package:worker/core/theme/typography.dart';

/// App theme configuration for Material 3 design system
/// Uses ColorScheme.fromSeed() to auto-generate harmonious colors from brand seed color
class AppTheme {
  AppTheme._();

  // ==================== Light Theme ====================

  /// Light theme configuration
  /// [seedColor] - Optional custom seed color, defaults to AppColors.defaultSeedColor
  static ThemeData lightTheme([Color? seedColor]) {
    final seed = seedColor ?? AppColors.defaultSeedColor;
    final ColorScheme colorScheme = ColorScheme.fromSeed(
      seedColor: seed,
      brightness: Brightness.light,
    ).copyWith(primary: seed);

    return ThemeData(
      useMaterial3: true,
      colorScheme: colorScheme,
      fontFamily: AppTypography.fontFamily,

      // AppBar uses colorScheme colors
      appBarTheme: AppBarTheme(
        elevation: 0,
        centerTitle: false,
        backgroundColor: colorScheme.surface,
        foregroundColor: colorScheme.onSurface,
        titleTextStyle: AppTypography.titleLarge.copyWith(
          color: colorScheme.onSurface,
          fontWeight: FontWeight.w600,
        ),
        iconTheme: IconThemeData(color: colorScheme.onSurface, size: 24),
        systemOverlayStyle: SystemUiOverlayStyle.dark,
      ),

      // Card Theme
      cardTheme: CardThemeData(
        elevation: 1,
        shape: const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(12)),
        ),
        clipBehavior: Clip.antiAlias,
        color: colorScheme.surface,
        margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      ),

      // Elevated Button Theme
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          backgroundColor: colorScheme.primary,
          foregroundColor: colorScheme.onPrimary,
          elevation: 1,
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
          textStyle: AppTypography.buttonText,
          minimumSize: const Size(64, 48),
        ),
      ),

      // Text Button Theme
      textButtonTheme: TextButtonThemeData(
        style: TextButton.styleFrom(
          foregroundColor: colorScheme.primary,
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
          textStyle: AppTypography.buttonText,
        ),
      ),

      // Outlined Button Theme
      outlinedButtonTheme: OutlinedButtonThemeData(
        style: OutlinedButton.styleFrom(
          foregroundColor: colorScheme.primary,
          side: BorderSide(color: colorScheme.outline, width: 1),
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
          textStyle: AppTypography.buttonText,
          minimumSize: const Size(64, 48),
        ),
      ),

      // Input Decoration Theme
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: colorScheme.surfaceContainerLowest,
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.outline, width: 1),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.outline, width: 1),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.primary, width: 2),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.error, width: 1),
        ),
        focusedErrorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.error, width: 2),
        ),
        labelStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
        hintStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
        errorStyle: AppTypography.bodySmall.copyWith(color: colorScheme.error),
      ),

      // Bottom Navigation Bar Theme
      bottomNavigationBarTheme: BottomNavigationBarThemeData(
        backgroundColor: colorScheme.surface,
        selectedItemColor: colorScheme.primary,
        unselectedItemColor: colorScheme.onSurfaceVariant,
        selectedIconTheme: IconThemeData(size: 28, color: colorScheme.primary),
        unselectedIconTheme: IconThemeData(
          size: 24,
          color: colorScheme.onSurfaceVariant,
        ),
        selectedLabelStyle: const TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.w600,
          fontFamily: AppTypography.fontFamily,
        ),
        unselectedLabelStyle: const TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.normal,
          fontFamily: AppTypography.fontFamily,
        ),
        type: BottomNavigationBarType.fixed,
        elevation: 3,
      ),

      // Floating Action Button Theme
      floatingActionButtonTheme: FloatingActionButtonThemeData(
        backgroundColor: colorScheme.primaryContainer,
        foregroundColor: colorScheme.onPrimaryContainer,
        elevation: 3,
        shape: const CircleBorder(),
      ),

      // Chip Theme
      chipTheme: ChipThemeData(
        backgroundColor: colorScheme.surfaceContainerLow,
        selectedColor: colorScheme.primaryContainer,
        disabledColor: colorScheme.surfaceContainerLowest,
        labelStyle: AppTypography.labelMedium,
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
      ),

      // Dialog Theme
      dialogTheme: DialogThemeData(
        backgroundColor: colorScheme.surface,
        elevation: 3,
        shape: const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(16)),
        ),
        titleTextStyle: AppTypography.headlineMedium.copyWith(
          color: colorScheme.onSurface,
        ),
        contentTextStyle: AppTypography.bodyLarge.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
      ),

      // Snackbar Theme
      snackBarTheme: SnackBarThemeData(
        backgroundColor: colorScheme.inverseSurface,
        contentTextStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onInverseSurface,
        ),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
        behavior: SnackBarBehavior.floating,
        elevation: 3,
      ),

      // Divider Theme
      dividerTheme: DividerThemeData(
        color: colorScheme.outlineVariant,
        thickness: 1,
        space: 1,
      ),

      // Icon Theme
      iconTheme: IconThemeData(color: colorScheme.onSurface, size: 24),

      // List Tile Theme
      listTileTheme: ListTileThemeData(
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
        titleTextStyle: AppTypography.titleMedium.copyWith(
          color: colorScheme.onSurface,
        ),
        subtitleTextStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
        iconColor: colorScheme.onSurfaceVariant,
      ),

      // Progress Indicator Theme
      progressIndicatorTheme: ProgressIndicatorThemeData(
        color: colorScheme.primary,
        linearTrackColor: colorScheme.surfaceContainerHighest,
        circularTrackColor: colorScheme.surfaceContainerHighest,
      ),

      // Badge Theme
      badgeTheme: const BadgeThemeData(
        backgroundColor: AppColors.danger,
        textColor: Colors.white,
        smallSize: 6,
        largeSize: 16,
      ),

      // Tab Bar Theme
      tabBarTheme: TabBarThemeData(
        labelColor: colorScheme.primary,
        unselectedLabelColor: colorScheme.onSurfaceVariant,
        indicatorColor: colorScheme.primary,
        labelStyle: AppTypography.labelLarge,
        unselectedLabelStyle: AppTypography.labelLarge,
      ),
    );
  }

  // ==================== Dark Theme ====================

  /// Dark theme configuration
  /// [seedColor] - Optional custom seed color, defaults to AppColors.defaultSeedColor
  static ThemeData darkTheme([Color? seedColor]) {
    final seed = seedColor ?? AppColors.defaultSeedColor;
    final ColorScheme colorScheme = ColorScheme.fromSeed(
      seedColor: seed,
      brightness: Brightness.dark,
    ).copyWith(primary: seed);

    return ThemeData(
      useMaterial3: true,
      colorScheme: colorScheme,
      fontFamily: AppTypography.fontFamily,

      // AppBar Theme
      appBarTheme: AppBarTheme(
        elevation: 0,
        centerTitle: false,
        backgroundColor: colorScheme.surface,
        foregroundColor: colorScheme.onSurface,
        titleTextStyle: AppTypography.titleLarge.copyWith(
          color: colorScheme.onSurface,
          fontWeight: FontWeight.w600,
        ),
        iconTheme: IconThemeData(color: colorScheme.onSurface, size: 24),
        systemOverlayStyle: SystemUiOverlayStyle.light,
      ),

      // Card Theme
      cardTheme: CardThemeData(
        elevation: 1,
        shape: const RoundedRectangleBorder(
          borderRadius: BorderRadius.all(Radius.circular(12)),
        ),
        clipBehavior: Clip.antiAlias,
        color: colorScheme.surfaceContainer,
        margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      ),

      // Elevated Button Theme
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          backgroundColor: colorScheme.primary,
          foregroundColor: colorScheme.onPrimary,
          elevation: 1,
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
          textStyle: AppTypography.buttonText,
          minimumSize: const Size(64, 48),
        ),
      ),

      // Input Decoration Theme
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: colorScheme.surfaceContainerHighest,
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.outline, width: 1),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.outline, width: 1),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.primary, width: 2),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.error, width: 1),
        ),
        focusedErrorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: BorderSide(color: colorScheme.error, width: 2),
        ),
        labelStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
        hintStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onSurfaceVariant,
        ),
        errorStyle: AppTypography.bodySmall.copyWith(color: colorScheme.error),
      ),

      // Bottom Navigation Bar Theme
      bottomNavigationBarTheme: BottomNavigationBarThemeData(
        backgroundColor: colorScheme.surface,
        selectedItemColor: colorScheme.primary,
        unselectedItemColor: colorScheme.onSurfaceVariant,
        selectedIconTheme: IconThemeData(size: 28, color: colorScheme.primary),
        unselectedIconTheme: IconThemeData(
          size: 24,
          color: colorScheme.onSurfaceVariant,
        ),
        selectedLabelStyle: const TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.w600,
          fontFamily: AppTypography.fontFamily,
        ),
        unselectedLabelStyle: const TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.normal,
          fontFamily: AppTypography.fontFamily,
        ),
        type: BottomNavigationBarType.fixed,
        elevation: 3,
      ),

      // Floating Action Button Theme
      floatingActionButtonTheme: FloatingActionButtonThemeData(
        backgroundColor: colorScheme.primaryContainer,
        foregroundColor: colorScheme.onPrimaryContainer,
        elevation: 3,
        shape: const CircleBorder(),
      ),

      // Snackbar Theme
      snackBarTheme: SnackBarThemeData(
        backgroundColor: colorScheme.inverseSurface,
        contentTextStyle: AppTypography.bodyMedium.copyWith(
          color: colorScheme.onInverseSurface,
        ),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
        behavior: SnackBarBehavior.floating,
        elevation: 3,
      ),

      // Badge Theme
      badgeTheme: const BadgeThemeData(
        backgroundColor: AppColors.danger,
        textColor: Colors.white,
        smallSize: 6,
        largeSize: 16,
      ),
    );
  }
}