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

class AppTheme {
  AppTheme._();

  static ThemeData get light => _buildTheme(Brightness.light);
  static ThemeData get dark => _buildTheme(Brightness.dark);

  static ThemeData _buildTheme(Brightness brightness) {
    final ColorScheme colorScheme;
    if (brightness == Brightness.dark) {
      colorScheme = ColorScheme(
        brightness: Brightness.dark,
        primary: const Color(0xFF60A5FA),
        onPrimary: const Color(0xFFFFFFFF),
        primaryContainer: const Color(0xFF1E3A5F),
        onPrimaryContainer: const Color(0xFFBFDBFE),
        secondary: const Color(0xFF93C5FD),
        onSecondary: const Color(0xFF0F172A),
        secondaryContainer: const Color(0xFF1E293B),
        onSecondaryContainer: const Color(0xFFBFDBFE),
        tertiary: const Color(0xFFC4B5FD),
        onTertiary: const Color(0xFF0F172A),
        tertiaryContainer: const Color(0xFF4C1D95),
        onTertiaryContainer: const Color(0xFFE9D5FF),
        error: const Color(0xFFD14343),
        onError: const Color(0xFFFFFFFF),
        errorContainer: const Color(0xFF7F1D1D),
        onErrorContainer: const Color(0xFFFEE2E2),
        surface: const Color(0xFF0F172A),
        onSurface: const Color(0xFFE2E8F0),
        surfaceContainerLowest: const Color(0xFF0F172A),
        surfaceContainerLow: const Color(0xFF1E293B),
        surfaceContainer: const Color(0xFF334155),
        surfaceContainerHigh: const Color(0xFF475569),
        surfaceContainerHighest: const Color(0xFF64748B),
        onSurfaceVariant: const Color(0xFF94A3B8),
        outline: const Color(0xFF64748B),
        outlineVariant: const Color(0xFF475569),
        shadow: Colors.black,
        scrim: Colors.black,
        inverseSurface: const Color(0xFFE2E8F0),
        onInverseSurface: const Color(0xFF1E293B),
        inversePrimary: const Color(0xFF2563EB),
      );
    } else {
      colorScheme = ColorScheme(
        brightness: Brightness.light,
        primary: const Color(0xFF3B82F6),
        onPrimary: const Color(0xFFFAFAFA),
        primaryContainer: const Color(0xFFDBEAFE),
        onPrimaryContainer: const Color(0xFF0F172A),
        secondary: const Color(0xFF2563EB),
        onSecondary: const Color(0xFFFFFFFF),
        secondaryContainer: const Color(0xFFDBEAFE),
        onSecondaryContainer: const Color(0xFF1E293B),
        tertiary: const Color(0xFF8B5CF6),
        onTertiary: const Color(0xFFFFFFFF),
        tertiaryContainer: const Color(0xFFF5F3FF),
        onTertiaryContainer: const Color(0xFF0F172A),
        error: const Color(0xFFEF4444),
        onError: const Color(0xFFFFFFFF),
        errorContainer: const Color(0xFFFEE2E2),
        onErrorContainer: const Color(0xFF7F1D1D),
        surface: const Color(0xFFFFFFFF),
        onSurface: const Color(0xFF0F172A),
        surfaceContainerLowest: const Color(0xFFFFFFFF),
        surfaceContainerLow: const Color(0xFFF8FAFC),
        surfaceContainer: const Color(0xFFF1F5F9),
        surfaceContainerHigh: const Color(0xFFE2E8F0),
        surfaceContainerHighest: const Color(0xFFCBD5E1),
        onSurfaceVariant: const Color(0xFF475569),
        outline: const Color(0xFF94A3B8),
        outlineVariant: const Color(0xFFCBD5E1),
        shadow: const Color(0xFF0F172A),
        scrim: const Color(0xFF0F172A),
        inverseSurface: const Color(0xFF1E293B),
        onInverseSurface: const Color(0xFFF1F5F9),
        inversePrimary: const Color(0xFF60A5FA),
      );
    }

    final themeExtension = brightness == Brightness.dark
        ? AppColorPalette.dark
        : AppColorPalette.light;

    return ThemeData(
      useMaterial3: true,
      brightness: brightness,
      colorScheme: colorScheme,
      scaffoldBackgroundColor: colorScheme.surface,
      fontFamily: 'Inter',
      extensions: [themeExtension],
      appBarTheme: AppBarTheme(
        backgroundColor: colorScheme.surface,
        foregroundColor: colorScheme.onSurface,
        elevation: 0,
      ),
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          backgroundColor: colorScheme.primary,
          foregroundColor: colorScheme.onPrimary,
          elevation: 0,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(AppRadius.sm),
          ),
        ),
      ),
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: colorScheme.surface,
        contentPadding: const EdgeInsets.symmetric(
          horizontal: 12,
          vertical: 10,
        ),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(AppRadius.sm),
          borderSide: BorderSide(color: colorScheme.outlineVariant),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(AppRadius.sm),
          borderSide: BorderSide(color: colorScheme.outlineVariant),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(AppRadius.sm),
          borderSide: BorderSide(color: colorScheme.primary),
        ),
        hintStyle: TextStyle(color: colorScheme.onSurfaceVariant, fontSize: 14),
      ),
    );
  }
}