import 'package:flutter/material.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:provider/provider.dart';
import '../theme/adaptive_theme.dart';

/// 테마 관리 Provider
class ThemeProvider extends ChangeNotifier {
  static const String _themeBoxName = 'theme_settings';
  static const String _themeKey = 'theme_settings';

  late Box<Map> _themeBox;
  ThemeSettings _themeSettings = const ThemeSettings();

  ThemeSettings get themeSettings => _themeSettings;

  AppThemeMode get themeMode => _themeSettings.mode;
  bool get useSystemColors => _themeSettings.useSystemColors;
  bool get largeText => _themeSettings.largeText;
  bool get reduceMotion => _themeSettings.reduceMotion;
  bool get highContrast => _themeSettings.highContrast;

  /// Provider 초기화
  Future<void> initialize() async {
    _themeBox = await Hive.openBox<Map>(_themeBoxName);
    await _loadThemeSettings();
  }

  /// 저장된 테마 설정 로드
  Future<void> _loadThemeSettings() async {
    final savedSettings = _themeBox.get(_themeKey);
    if (savedSettings != null) {
      _themeSettings = ThemeSettings.fromJson(
        Map<String, dynamic>.from(savedSettings),
      );
      notifyListeners();
    }
  }

  /// 테마 설정 저장
  Future<void> _saveThemeSettings() async {
    await _themeBox.put(_themeKey, _themeSettings.toJson());
  }

  /// 테마 모드 변경
  Future<void> setThemeMode(AppThemeMode mode) async {
    _themeSettings = _themeSettings.copyWith(mode: mode);
    await _saveThemeSettings();
    notifyListeners();
  }

  /// 시스템 색상 사용 설정
  Future<void> setUseSystemColors(bool value) async {
    _themeSettings = _themeSettings.copyWith(useSystemColors: value);
    await _saveThemeSettings();
    notifyListeners();
  }

  /// 큰 텍스트 설정
  Future<void> setLargeText(bool value) async {
    _themeSettings = _themeSettings.copyWith(largeText: value);
    await _saveThemeSettings();
    notifyListeners();
  }

  /// 모션 감소 설정
  Future<void> setReduceMotion(bool value) async {
    _themeSettings = _themeSettings.copyWith(reduceMotion: value);
    await _saveThemeSettings();
    notifyListeners();
  }

  /// 고대비 설정
  Future<void> setHighContrast(bool value) async {
    _themeSettings = _themeSettings.copyWith(highContrast: value);
    await _saveThemeSettings();
    notifyListeners();
  }

  /// 현재 설정에 따른 테마 가져오기
  ThemeData getTheme(BuildContext context) {
    final platformBrightness = MediaQuery.of(context).platformBrightness;

    ThemeData baseTheme;

    switch (_themeSettings.mode) {
      case AppThemeMode.light:
        baseTheme = AdaptiveTheme.lightTheme;
        break;
      case AppThemeMode.dark:
        baseTheme = AdaptiveTheme.darkTheme;
        break;
      case AppThemeMode.oled:
        baseTheme = AdaptiveTheme.oledTheme;
        break;
      case AppThemeMode.system:
        baseTheme = platformBrightness == Brightness.dark
            ? AdaptiveTheme.darkTheme
            : AdaptiveTheme.lightTheme;
        break;
    }

    // 접근성 설정 적용
    return AdaptiveTheme.getAccessibleTheme(
      baseTheme,
      largeText: _themeSettings.largeText,
      reduceMotion: _themeSettings.reduceMotion,
      highContrast: _themeSettings.highContrast,
    );
  }

  /// 현재 테마가 다크 모드인지 확인
  bool isDarkMode(BuildContext context) {
    final platformBrightness = MediaQuery.of(context).platformBrightness;

    switch (_themeSettings.mode) {
      case AppThemeMode.light:
        return false;
      case AppThemeMode.dark:
      case AppThemeMode.oled:
        return true;
      case AppThemeMode.system:
        return platformBrightness == Brightness.dark;
    }
  }

  /// 테마 토글 (라이트/다크)
  Future<void> toggleTheme() async {
    if (_themeSettings.mode == AppThemeMode.light) {
      await setThemeMode(AppThemeMode.dark);
    } else {
      await setThemeMode(AppThemeMode.light);
    }
  }
}

/// 테마 전환 애니메이션 위젯
class AnimatedThemeBuilder extends StatelessWidget {
  final Widget Function(BuildContext, ThemeData) builder;
  final Duration duration;

  const AnimatedThemeBuilder({
    super.key,
    required this.builder,
    this.duration = const Duration(milliseconds: 300),
  });

  @override
  Widget build(BuildContext context) {
    final themeProvider = context.watch<ThemeProvider>();
    final theme = themeProvider.getTheme(context);

    return AnimatedTheme(
      data: theme,
      duration: duration,
      child: Builder(
        builder: (context) => builder(context, theme),
      ),
    );
  }
}

/// 테마별 색상 위젯
class ThemedColor extends StatelessWidget {
  final Color lightColor;
  final Color darkColor;
  final Widget child;

  const ThemedColor({
    super.key,
    required this.lightColor,
    required this.darkColor,
    required this.child,
  });

  @override
  Widget build(BuildContext context) {
    final isDark = context.read<ThemeProvider>().isDarkMode(context);

    return Theme(
      data: Theme.of(context).copyWith(
        primaryColor: isDark ? darkColor : lightColor,
      ),
      child: child,
    );
  }
}