import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:trainhub_flutter/core/theme/app_colors.dart';
import 'package:trainhub_flutter/core/constants/ui_constants.dart';

class AppTheme {
  AppTheme._();

  static final ThemeData dark = ThemeData(
    useMaterial3: true,
    brightness: Brightness.dark,
    colorScheme: const ColorScheme.dark(
      primary: AppColors.accent,
      onPrimary: AppColors.zinc950,
      secondary: AppColors.zinc200,
      onSecondary: AppColors.zinc950,
      surface: AppColors.surface,
      onSurface: AppColors.zinc50,
      surfaceContainer: AppColors.surfaceContainer,
      error: AppColors.destructive,
      onError: AppColors.zinc50,
      outline: AppColors.border,
      outlineVariant: AppColors.zinc700,
    ),
    scaffoldBackgroundColor: AppColors.surface,
    textTheme: GoogleFonts.interTextTheme(ThemeData.dark().textTheme)
        .copyWith(
          displayLarge: GoogleFonts.chakraPetch(fontWeight: FontWeight.w700),
          displayMedium: GoogleFonts.chakraPetch(fontWeight: FontWeight.w700),
          displaySmall: GoogleFonts.chakraPetch(fontWeight: FontWeight.w700),
          headlineLarge: GoogleFonts.chakraPetch(fontWeight: FontWeight.w700),
          headlineMedium: GoogleFonts.chakraPetch(fontWeight: FontWeight.w600),
          headlineSmall: GoogleFonts.chakraPetch(fontWeight: FontWeight.w600),
        )
        .apply(
          bodyColor: AppColors.textPrimary,
          displayColor: AppColors.textPrimary,
        ),
    cardTheme: CardThemeData(
      color: AppColors.surfaceContainer,
      elevation: 0,
      shape: RoundedRectangleBorder(
        borderRadius: UIConstants.cardBorderRadius,
        side: const BorderSide(color: AppColors.border, width: 1),
      ),
      margin: EdgeInsets.zero,
    ),
    dividerTheme: const DividerThemeData(
      color: AppColors.border,
      thickness: 1,
      space: 1,
    ),
    iconTheme: const IconThemeData(color: AppColors.textSecondary, size: 20),
    navigationRailTheme: NavigationRailThemeData(
      backgroundColor: AppColors.surfaceContainer,
      selectedIconTheme: const IconThemeData(color: AppColors.accent),
      unselectedIconTheme: const IconThemeData(color: AppColors.textMuted),
      selectedLabelTextStyle: GoogleFonts.inter(
        fontSize: 12,
        fontWeight: FontWeight.w500,
        color: AppColors.textPrimary,
      ),
      unselectedLabelTextStyle: GoogleFonts.inter(
        fontSize: 12,
        fontWeight: FontWeight.w400,
        color: AppColors.textMuted,
      ),
      indicatorColor: AppColors.accentMuted,
    ),
    inputDecorationTheme: InputDecorationTheme(
      filled: true,
      fillColor: AppColors.surfaceContainer,
      contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 12),
      border: OutlineInputBorder(
        borderRadius: UIConstants.smallCardBorderRadius,
        borderSide: const BorderSide(color: AppColors.border),
      ),
      enabledBorder: OutlineInputBorder(
        borderRadius: UIConstants.smallCardBorderRadius,
        borderSide: const BorderSide(color: AppColors.border),
      ),
      focusedBorder: OutlineInputBorder(
        borderRadius: UIConstants.smallCardBorderRadius,
        borderSide: const BorderSide(color: AppColors.accent, width: 1),
      ),
      hintStyle: GoogleFonts.inter(color: AppColors.textMuted, fontSize: 14),
      labelStyle: GoogleFonts.inter(
        color: AppColors.textSecondary,
        fontSize: 14,
      ),
    ),
    dialogTheme: DialogThemeData(
      backgroundColor: AppColors.surfaceContainer,
      shape: RoundedRectangleBorder(
        borderRadius: UIConstants.cardBorderRadius,
        side: const BorderSide(color: AppColors.border),
      ),
      titleTextStyle: GoogleFonts.inter(
        fontSize: 18,
        fontWeight: FontWeight.w600,
        color: AppColors.textPrimary,
      ),
    ),
    filledButtonTheme: FilledButtonThemeData(
      style: FilledButton.styleFrom(
        backgroundColor: AppColors.accent,
        foregroundColor: AppColors.zinc950,
        shape: RoundedRectangleBorder(
          borderRadius: UIConstants.smallCardBorderRadius,
        ),
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
        textStyle: GoogleFonts.chakraPetch(
          fontSize: 14,
          fontWeight: FontWeight.w600,
          letterSpacing: 0.8,
        ),
      ),
    ),
    outlinedButtonTheme: OutlinedButtonThemeData(
      style: OutlinedButton.styleFrom(
        foregroundColor: AppColors.textPrimary,
        side: const BorderSide(color: AppColors.border),
        shape: RoundedRectangleBorder(
          borderRadius: UIConstants.smallCardBorderRadius,
        ),
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
        textStyle: GoogleFonts.inter(fontSize: 14, fontWeight: FontWeight.w500),
      ),
    ),
    textButtonTheme: TextButtonThemeData(
      style: TextButton.styleFrom(
        foregroundColor: AppColors.textSecondary,
        shape: RoundedRectangleBorder(
          borderRadius: UIConstants.smallCardBorderRadius,
        ),
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
        textStyle: GoogleFonts.inter(fontSize: 14, fontWeight: FontWeight.w500),
      ),
    ),
    tabBarTheme: TabBarThemeData(
      labelColor: AppColors.textPrimary,
      unselectedLabelColor: AppColors.textMuted,
      indicatorColor: AppColors.accent,
      dividerColor: AppColors.border,
      labelStyle: GoogleFonts.chakraPetch(
        fontSize: 13,
        fontWeight: FontWeight.w600,
        letterSpacing: 1,
      ),
      unselectedLabelStyle: GoogleFonts.chakraPetch(
        fontSize: 13,
        fontWeight: FontWeight.w500,
        letterSpacing: 1,
      ),
    ),
    snackBarTheme: SnackBarThemeData(
      backgroundColor: AppColors.surfaceContainer,
      contentTextStyle: GoogleFonts.inter(
        color: AppColors.textPrimary,
        fontSize: 14,
      ),
      shape: RoundedRectangleBorder(
        borderRadius: UIConstants.smallCardBorderRadius,
        side: const BorderSide(color: AppColors.border),
      ),
      behavior: SnackBarBehavior.floating,
    ),
    bottomSheetTheme: const BottomSheetThemeData(
      backgroundColor: AppColors.surfaceContainer,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
      ),
    ),
    dropdownMenuTheme: DropdownMenuThemeData(
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: AppColors.surfaceContainer,
        border: OutlineInputBorder(
          borderRadius: UIConstants.smallCardBorderRadius,
          borderSide: const BorderSide(color: AppColors.border),
        ),
      ),
    ),
    checkboxTheme: CheckboxThemeData(
      fillColor: WidgetStateProperty.resolveWith((states) {
        if (states.contains(WidgetState.selected)) {
          return AppColors.accent;
        }
        return Colors.transparent;
      }),
      checkColor: WidgetStateProperty.all(AppColors.zinc950),
      side: const BorderSide(color: AppColors.zinc400),
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
    ),
    tooltipTheme: TooltipThemeData(
      decoration: BoxDecoration(
        color: AppColors.zinc800,
        borderRadius: BorderRadius.circular(6),
        border: Border.all(color: AppColors.zinc700),
      ),
      textStyle: GoogleFonts.inter(color: AppColors.textPrimary, fontSize: 12),
    ),
  );
}