import 'package:flutter/material.dart';

class ThemePreset {
  final String id;
  final String name;
  final Brightness brightness;
  final Color darkBackground;
  final Color cardSurface;
  final Color glassSurface;
  final Color glassBorder;
  final Color primaryColor;
  final Color accentColor;
  final Color accentRed;
  final Color textPrimary;
  final Color textSecondary;
  final Color textMuted;
  final double borderRadius;
  final List<BoxShadow> boxShadows;

  const ThemePreset({
    required this.id,
    required this.name,
    required this.brightness,
    required this.darkBackground,
    required this.cardSurface,
    required this.glassSurface,
    required this.glassBorder,
    required this.primaryColor,
    required this.accentColor,
    required this.accentRed,
    required this.textPrimary,
    required this.textSecondary,
    required this.textMuted,
    required this.borderRadius,
    required this.boxShadows,
  });

  ThemeData toThemeData() {
    final isDark = brightness == Brightness.dark;
    return (isDark ? ThemeData.dark() : ThemeData.light()).copyWith(
      scaffoldBackgroundColor: darkBackground,
      primaryColor: primaryColor,
      colorScheme: isDark
          ? ColorScheme.dark(
              primary: primaryColor,
              secondary: accentColor,
              surface: cardSurface,
              error: accentRed,
            )
          : ColorScheme.light(
              primary: primaryColor,
              secondary: accentColor,
              surface: cardSurface,
              error: accentRed,
            ),
      appBarTheme: AppBarTheme(
        backgroundColor: cardSurface,
        elevation: isDark ? 0 : 1,
        centerTitle: false,
        iconTheme: IconThemeData(color: textPrimary),
        titleTextStyle: TextStyle(color: textPrimary, fontSize: 18, fontWeight: FontWeight.bold),
      ),
      cardTheme: CardThemeData(
        color: cardSurface,
        elevation: isDark ? 0 : 2,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(borderRadius),
          side: BorderSide(color: glassBorder, width: 1),
        ),
      ),
      dialogTheme: DialogThemeData(
        backgroundColor: cardSurface,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(borderRadius + 2),
          side: BorderSide(color: glassBorder, width: 1),
        ),
      ),
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: glassSurface,
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(borderRadius),
          borderSide: BorderSide(color: glassBorder),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(borderRadius),
          borderSide: BorderSide(color: glassBorder),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(borderRadius),
          borderSide: BorderSide(color: primaryColor, width: 1.5),
        ),
      ),
    );
  }
}

/// Dynamic Finlytic Multi-Theme Presets & Tokens Engine.
class AppTheme {
  static const ThemePreset darkClassic = ThemePreset(
    id: 'dark_classic',
    name: 'Dark',
    brightness: Brightness.dark,
    darkBackground: Color(0xFF0A0E17),
    cardSurface: Color(0xFF12182B),
    glassSurface: Color(0x2A1A233A),
    glassBorder: Color(0x33425980),
    primaryColor: Color(0xFF00E676),
    accentColor: Color(0xFF00E5FF),
    accentRed: Color(0xFFFF5252),
    textPrimary: Colors.white,
    textSecondary: Color(0xFFB0BEC5),
    textMuted: Color(0xFF607D8B),
    borderRadius: 14.0,
    boxShadows: [
      BoxShadow(color: Color(0x1F000000), blurRadius: 10, offset: Offset(0, 4)),
    ],
  );

  static const ThemePreset darkCyberNeon = ThemePreset(
    id: 'dark_cyber_neon',
    name: 'Alternative Dark (Cyber Neon)',
    brightness: Brightness.dark,
    darkBackground: Color(0xFF0D0B1E),
    cardSurface: Color(0xFF161233),
    glassSurface: Color(0x3A261D52),
    glassBorder: Color(0x5500FFA3),
    primaryColor: Color(0xFF00FFA3),
    accentColor: Color(0xFFFF007A),
    accentRed: Color(0xFFFF2E93),
    textPrimary: Color(0xFFF5F3FF),
    textSecondary: Color(0xFFC4B5FD),
    textMuted: Color(0xFF8B5CF6),
    borderRadius: 8.0,
    boxShadows: [
      BoxShadow(color: Color(0x3300FFA3), blurRadius: 12, spreadRadius: -2),
    ],
  );

  static const ThemePreset lightClassic = ThemePreset(
    id: 'light_classic',
    name: 'Light',
    brightness: Brightness.light,
    darkBackground: Color(0xFFF8FAFC),
    cardSurface: Color(0xFFFFFFFF),
    glassSurface: Color(0xFFF1F5F9),
    glassBorder: Color(0xFFE2E8F0),
    primaryColor: Color(0xFF059669),
    accentColor: Color(0xFF0284C7),
    accentRed: Color(0xFFDC2626),
    textPrimary: Color(0xFF0F172A),
    textSecondary: Color(0xFF475569),
    textMuted: Color(0xFF94A3B8),
    borderRadius: 16.0,
    boxShadows: [
      BoxShadow(color: Color(0x0F000000), blurRadius: 12, offset: Offset(0, 4)),
    ],
  );

  static const ThemePreset lightWarmSand = ThemePreset(
    id: 'light_warm_sand',
    name: 'Alternative Light (Warm Paper)',
    brightness: Brightness.light,
    darkBackground: Color(0xFFF5F2EB),
    cardSurface: Color(0xFFFFFDF9),
    glassSurface: Color(0xFFEFEADF),
    glassBorder: Color(0xFFE2D9C8),
    primaryColor: Color(0xFFD97706),
    accentColor: Color(0xFF2563EB),
    accentRed: Color(0xFFE11D48),
    textPrimary: Color(0xFF272522),
    textSecondary: Color(0xFF57534E),
    textMuted: Color(0xFFA8A29E),
    borderRadius: 12.0,
    boxShadows: [
      BoxShadow(color: Color(0x14443422), blurRadius: 8, offset: Offset(0, 3)),
    ],
  );

  static const ThemePreset nordicMint = ThemePreset(
    id: 'nordic_mint',
    name: 'Nordic Mint',
    brightness: Brightness.light,
    darkBackground: Color(0xFFEFF6F5),
    cardSurface: Color(0xFFFFFFFF),
    glassSurface: Color(0xFFE0F2FE),
    glassBorder: Color(0xFFCCFBF1),
    primaryColor: Color(0xFF0D9488),
    accentColor: Color(0xFF0284C7),
    accentRed: Color(0xFFF43F5E),
    textPrimary: Color(0xFF111827),
    textSecondary: Color(0xFF374151),
    textMuted: Color(0xFF6B7280),
    borderRadius: 20.0,
    boxShadows: [
      BoxShadow(color: Color(0x0D0F766E), blurRadius: 14, offset: Offset(0, 4)),
    ],
  );

  static const List<ThemePreset> allPresets = [
    darkClassic,
    darkCyberNeon,
    lightClassic,
    lightWarmSand,
    nordicMint,
  ];

  static ThemePreset getPresetById(String? id) {
    return allPresets.firstWhere(
      (p) => p.id.toLowerCase() == id?.toLowerCase(),
      orElse: () => darkClassic,
    );
  }

  // Legacy static color mappings for backward compatibility
  static Color get darkBackground => activePreset.darkBackground;
  static Color get cardSurface => activePreset.cardSurface;
  static Color get surfaceDark => activePreset.cardSurface;
  static Color get glassSurface => activePreset.glassSurface;
  static Color get glassBorder => activePreset.glassBorder;
  static Color get primaryEmerald => activePreset.primaryColor;
  static Color get accentCyan => activePreset.accentColor;
  static Color get accentRed => activePreset.accentRed;
  static Color get textPrimary => activePreset.textPrimary;
  static Color get textSecondary => activePreset.textSecondary;
  static Color get textMuted => activePreset.textMuted;

  static ThemePreset activePreset = darkClassic;

  static ThemeData get darkTheme => activePreset.toThemeData();
}