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

/// 主题模式枚举
enum ThemeModeType {
  system,  // 跟随系统
  light,   // 浅色模式
  dark,    // 深色模式
}

/// 主题配置提供者
final themeModeProvider = StateNotifierProvider<ThemeModeNotifier, ThemeModeType>(
  (ref) => ThemeModeNotifier(),
);

/// 主题模式状态管理器
class ThemeModeNotifier extends StateNotifier<ThemeModeType> {
  ThemeModeNotifier() : super(ThemeModeType.system);

  /// 设置主题模式
  void setThemeMode(ThemeModeType mode) {
    state = mode;
  }

  /// 切换深色/浅色模式
  void toggleDarkMode() {
    state = state == ThemeModeType.dark ? ThemeModeType.light : ThemeModeType.dark;
  }

  /// 获取对应的 Flutter ThemeMode
  ThemeMode get flutterThemeMode {
    switch (state) {
      case ThemeModeType.system:
        return ThemeMode.system;
      case ThemeModeType.light:
        return ThemeMode.light;
      case ThemeModeType.dark:
        return ThemeMode.dark;
    }
  }

  /// 判断是否为深色模式
  bool get isDarkMode {
    return state == ThemeModeType.dark;
  }
}

/// EDA 专用主题配置
class EdaTheme {
  // ========== 浅色主题配色 ==========
  
  // 主色调 - EDA 行业常用蓝色系
  static const Color lightPrimaryColor = Color(0xFF1976D2);
  static const Color lightSecondaryColor = Color(0xFF42A5F5);
  static const Color lightAccentColor = Color(0xFFFF9800);
  
  // 背景色
  static const Color lightScaffoldBg = Color(0xFFF5F5F5);
  static const Color lightCanvasBg = Color(0xFFFAFAFA);
  static const Color lightCardBg = Color(0xFFFFFFFF);
  static const Color lightSurfaceBg = Color(0xFFFFFFFF);
  
  // 网格颜色
  static const Color lightGridColor = Color(0xFFE0E0E0);
  static const Color lightGridDotColor = Color(0xFFBDBDBD);
  
  // 元件颜色
  static const Color lightComponentColor = Color(0xFF212121);
  static const Color lightComponentBg = Color(0xFFFFFFFF);
  static const Color lightPinColor = Color(0xFF424242);
  static const Color lightWireColor = Color(0xFF1976D2);
  
  // 选中/高亮颜色
  static const Color lightSelectedColor = Color(0xFFFF9800);
  static const Color lightHighlightColor = Color(0xFF4CAF50);
  static const Color lightHoverColor = Color(0xFFE3F2FD);
  
  // 文本颜色
  static const Color lightTextPrimary = Color(0xFF212121);
  static const Color lightTextSecondary = Color(0xFF757575);
  static const Color lightTextHint = Color(0xFFBDBDBD);
  
  // 边框/分割线颜色
  static const Color lightBorderColor = Color(0xFFE0E0E0);
  static const Color lightDividerColor = Color(0xFFEEEEEE);
  
  // ========== 深色主题配色 ==========
  
  // 主色调 - 保持品牌一致性，稍微降低饱和度
  static const Color darkPrimaryColor = Color(0xFF42A5F5);
  static const Color darkSecondaryColor = Color(0xFF64B5F6);
  static const Color darkAccentColor = Color(0xFFFFB74D);
  
  // 背景色 - 遵循 Material Design 深色主题规范
  static const Color darkScaffoldBg = Color(0xFF121212);
  static const Color darkCanvasBg = Color(0xFF1E1E1E);
  static const Color darkCardBg = Color(0xFF1E1E1E);
  static const Color darkSurfaceBg = Color(0xFF2D2D2D);
  
  // 网格颜色 - 降低对比度避免视觉疲劳
  static const Color darkGridColor = Color(0xFF333333);
  static const Color darkGridDotColor = Color(0xFF424242);
  
  // 元件颜色 - 提高亮度确保可见性
  static const Color darkComponentColor = Color(0xFFE0E0E0);
  static const Color darkComponentBg = Color(0xFF2D2D2D);
  static const Color darkPinColor = Color(0xFFBDBDBD);
  static const Color darkWireColor = Color(0xFF64B5F6);
  
  // 选中/高亮颜色 - 提高饱和度
  static const Color darkSelectedColor = Color(0xFFFFB74D);
  static const Color darkHighlightColor = Color(0xFF81C784);
  static const Color darkHoverColor = Color(0xFF424242);
  
  // 文本颜色 - 遵循 Material Design 深色主题文本规范
  static const Color darkTextPrimary = Color(0xFFE0E0E0);
  static const Color darkTextSecondary = Color(0xFFB0B0B0);
  static const Color darkTextHint = Color(0xFF757575);
  
  // 边框/分割线颜色
  static const Color darkBorderColor = Color(0xFF424242);
  static const Color darkDividerColor = Color(0xFF333333);
  
  /// 获取浅色主题
  static ThemeData get lightTheme {
    return ThemeData(
      useMaterial3: true,
      brightness: Brightness.light,
      colorScheme: const ColorScheme.light(
        primary: lightPrimaryColor,
        secondary: lightSecondaryColor,
        tertiary: lightAccentColor,
        surface: lightSurfaceBg,
        error: Color(0xFFB00020),
        onPrimary: Colors.white,
        onSecondary: Colors.white,
        onSurface: lightTextPrimary,
        onError: Colors.white,
      ),
      scaffoldBackgroundColor: lightScaffoldBg,
      canvasColor: lightCanvasBg,
      cardColor: lightCardBg,
      dividerColor: lightDividerColor,
      
      // AppBar 主题
      appBarTheme: const AppBarTheme(
        backgroundColor: lightPrimaryColor,
        foregroundColor: Colors.white,
        elevation: 2,
        centerTitle: false,
        titleTextStyle: TextStyle(
          color: Colors.white,
          fontSize: 20,
          fontWeight: FontWeight.w600,
        ),
      ),
      
      // 卡片主题
      cardTheme: CardTheme(
        color: lightCardBg,
        elevation: 2,
        shadowColor: Colors.black12,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12),
        ),
      ),
      
      // 按钮主题
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          backgroundColor: lightPrimaryColor,
          foregroundColor: Colors.white,
          elevation: 2,
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(8),
          ),
        ),
      ),
      
      // 文本字段主题
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: lightCardBg,
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: lightBorderColor),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: lightBorderColor),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: lightPrimaryColor, width: 2),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: Color(0xFFB00020)),
        ),
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      ),
      
      // 文本主题
      textTheme: const TextTheme(
        displayLarge: TextStyle(color: lightTextPrimary, fontSize: 32, fontWeight: FontWeight.bold),
        displayMedium: TextStyle(color: lightTextPrimary, fontSize: 28, fontWeight: FontWeight.bold),
        displaySmall: TextStyle(color: lightTextPrimary, fontSize: 24, fontWeight: FontWeight.bold),
        headlineLarge: TextStyle(color: lightTextPrimary, fontSize: 22, fontWeight: FontWeight.w600),
        headlineMedium: TextStyle(color: lightTextPrimary, fontSize: 20, fontWeight: FontWeight.w600),
        headlineSmall: TextStyle(color: lightTextPrimary, fontSize: 18, fontWeight: FontWeight.w600),
        titleLarge: TextStyle(color: lightTextPrimary, fontSize: 16, fontWeight: FontWeight.w600),
        titleMedium: TextStyle(color: lightTextPrimary, fontSize: 14, fontWeight: FontWeight.w500),
        titleSmall: TextStyle(color: lightTextPrimary, fontSize: 12, fontWeight: FontWeight.w500),
        bodyLarge: TextStyle(color: lightTextPrimary, fontSize: 16),
        bodyMedium: TextStyle(color: lightTextPrimary, fontSize: 14),
        bodySmall: TextStyle(color: lightTextSecondary, fontSize: 12),
        labelLarge: TextStyle(color: lightTextPrimary, fontSize: 14, fontWeight: FontWeight.w500),
        labelMedium: TextStyle(color: lightTextSecondary, fontSize: 12),
        labelSmall: TextStyle(color: lightTextHint, fontSize: 10),
      ),
      
      // 图标主题
      iconTheme: const IconThemeData(
        color: lightTextPrimary,
        size: 24,
      ),
      
      // 开关主题
      switchTheme: SwitchThemeData(
        thumbColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return lightPrimaryColor;
          }
          return Colors.grey;
        }),
        trackColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return lightPrimaryColor.withOpacity(0.5);
          }
          return Colors.grey.shade300;
        }),
      ),
      
      // 复选框主题
      checkboxTheme: CheckboxThemeData(
        fillColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return lightPrimaryColor;
          }
          return Colors.transparent;
        }),
      ),
      
      // 单选按钮主题
      radioTheme: RadioThemeData(
        fillColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return lightPrimaryColor;
          }
          return Colors.grey;
        }),
      ),
      
      // 滑块主题
      sliderTheme: SliderThemeData(
        activeTrackColor: lightPrimaryColor,
        inactiveTrackColor: lightPrimaryColor.withOpacity(0.3),
        thumbColor: lightPrimaryColor,
        overlayColor: lightPrimaryColor.withOpacity(0.12),
      ),
      
      // 底部导航栏主题
      bottomNavigationBarTheme: const BottomNavigationBarThemeData(
        backgroundColor: lightCardBg,
        selectedItemColor: lightPrimaryColor,
        unselectedItemColor: lightTextSecondary,
        type: BottomNavigationBarType.fixed,
        elevation: 8,
      ),
      
      // 导航抽屉主题
      drawerTheme: const DrawerThemeData(
        backgroundColor: lightCardBg,
      ),
      
      // 对话框主题
      dialogTheme: DialogTheme(
        backgroundColor: lightCardBg,
        elevation: 8,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(16),
        ),
      ),
      
      // 底部工作表主题
      bottomSheetTheme: const BottomSheetThemeData(
        backgroundColor: lightCardBg,
        elevation: 8,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
        ),
      ),
    );
  }
  
  /// 获取深色主题
  static ThemeData get darkTheme {
    return ThemeData(
      useMaterial3: true,
      brightness: Brightness.dark,
      colorScheme: const ColorScheme.dark(
        primary: darkPrimaryColor,
        secondary: darkSecondaryColor,
        tertiary: darkAccentColor,
        surface: darkSurfaceBg,
        error: Color(0xFFCF6679),
        onPrimary: Colors.black,
        onSecondary: Colors.black,
        onSurface: darkTextPrimary,
        onError: Colors.black,
      ),
      scaffoldBackgroundColor: darkScaffoldBg,
      canvasColor: darkCanvasBg,
      cardColor: darkCardBg,
      dividerColor: darkDividerColor,
      
      // AppBar 主题
      appBarTheme: const AppBarTheme(
        backgroundColor: darkSurfaceBg,
        foregroundColor: darkTextPrimary,
        elevation: 0,
        centerTitle: false,
        titleTextStyle: TextStyle(
          color: darkTextPrimary,
          fontSize: 20,
          fontWeight: FontWeight.w600,
        ),
      ),
      
      // 卡片主题
      cardTheme: CardTheme(
        color: darkCardBg,
        elevation: 0,
        shadowColor: Colors.black26,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12),
          side: const BorderSide(color: darkBorderColor, width: 1),
        ),
      ),
      
      // 按钮主题
      elevatedButtonTheme: ElevatedButtonThemeData(
        style: ElevatedButton.styleFrom(
          backgroundColor: darkPrimaryColor,
          foregroundColor: Colors.black,
          elevation: 0,
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(8),
          ),
        ),
      ),
      
      // 文本字段主题
      inputDecorationTheme: InputDecorationTheme(
        filled: true,
        fillColor: darkSurfaceBg,
        border: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: darkBorderColor),
        ),
        enabledBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: darkBorderColor),
        ),
        focusedBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: darkPrimaryColor, width: 2),
        ),
        errorBorder: OutlineInputBorder(
          borderRadius: BorderRadius.circular(8),
          borderSide: const BorderSide(color: Color(0xFFCF6679)),
        ),
        contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      ),
      
      // 文本主题
      textTheme: const TextTheme(
        displayLarge: TextStyle(color: darkTextPrimary, fontSize: 32, fontWeight: FontWeight.bold),
        displayMedium: TextStyle(color: darkTextPrimary, fontSize: 28, fontWeight: FontWeight.bold),
        displaySmall: TextStyle(color: darkTextPrimary, fontSize: 24, fontWeight: FontWeight.bold),
        headlineLarge: TextStyle(color: darkTextPrimary, fontSize: 22, fontWeight: FontWeight.w600),
        headlineMedium: TextStyle(color: darkTextPrimary, fontSize: 20, fontWeight: FontWeight.w600),
        headlineSmall: TextStyle(color: darkTextPrimary, fontSize: 18, fontWeight: FontWeight.w600),
        titleLarge: TextStyle(color: darkTextPrimary, fontSize: 16, fontWeight: FontWeight.w600),
        titleMedium: TextStyle(color: darkTextPrimary, fontSize: 14, fontWeight: FontWeight.w500),
        titleSmall: TextStyle(color: darkTextPrimary, fontSize: 12, fontWeight: FontWeight.w500),
        bodyLarge: TextStyle(color: darkTextPrimary, fontSize: 16),
        bodyMedium: TextStyle(color: darkTextPrimary, fontSize: 14),
        bodySmall: TextStyle(color: darkTextSecondary, fontSize: 12),
        labelLarge: TextStyle(color: darkTextPrimary, fontSize: 14, fontWeight: FontWeight.w500),
        labelMedium: TextStyle(color: darkTextSecondary, fontSize: 12),
        labelSmall: TextStyle(color: darkTextHint, fontSize: 10),
      ),
      
      // 图标主题
      iconTheme: const IconThemeData(
        color: darkTextPrimary,
        size: 24,
      ),
      
      // 开关主题
      switchTheme: SwitchThemeData(
        thumbColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return darkPrimaryColor;
          }
          return Colors.grey;
        }),
        trackColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return darkPrimaryColor.withOpacity(0.5);
          }
          return Colors.grey.shade700;
        }),
      ),
      
      // 复选框主题
      checkboxTheme: CheckboxThemeData(
        fillColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return darkPrimaryColor;
          }
          return Colors.transparent;
        }),
      ),
      
      // 单选按钮主题
      radioTheme: RadioThemeData(
        fillColor: WidgetStateProperty.resolveWith((states) {
          if (states.contains(WidgetState.selected)) {
            return darkPrimaryColor;
          }
          return Colors.grey;
        }),
      ),
      
      // 滑块主题
      sliderTheme: SliderThemeData(
        activeTrackColor: darkPrimaryColor,
        inactiveTrackColor: darkPrimaryColor.withOpacity(0.3),
        thumbColor: darkPrimaryColor,
        overlayColor: darkPrimaryColor.withOpacity(0.12),
      ),
      
      // 底部导航栏主题
      bottomNavigationBarTheme: const BottomNavigationBarThemeData(
        backgroundColor: darkSurfaceBg,
        selectedItemColor: darkPrimaryColor,
        unselectedItemColor: darkTextSecondary,
        type: BottomNavigationBarType.fixed,
        elevation: 8,
      ),
      
      // 导航抽屉主题
      drawerTheme: const DrawerThemeData(
        backgroundColor: darkSurfaceBg,
      ),
      
      // 对话框主题
      dialogTheme: DialogTheme(
        backgroundColor: darkSurfaceBg,
        elevation: 8,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(16),
        ),
      ),
      
      // 底部工作表主题
      bottomSheetTheme: const BottomSheetThemeData(
        backgroundColor: darkSurfaceBg,
        elevation: 8,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
        ),
      ),
    );
  }
  
  /// 获取画布背景色（根据主题）
  static Color getCanvasBg(BuildContext context) {
    return Theme.of(context).brightness == Brightness.dark 
        ? darkCanvasBg 
        : lightCanvasBg;
  }
  
  /// 获取网格颜色（根据主题）
  static Color getGridColor(BuildContext context) {
    return Theme.of(context).brightness == Brightness.dark 
        ? darkGridColor 
        : lightGridColor;
  }
  
  /// 获取元件颜色（根据主题）
  static Color getComponentColor(BuildContext context) {
    return Theme.of(context).brightness == Brightness.dark 
        ? darkComponentColor 
        : lightComponentColor;
  }
  
  /// 获取连线颜色（根据主题）
  static Color getWireColor(BuildContext context) {
    return Theme.of(context).brightness == Brightness.dark 
        ? darkWireColor 
        : lightWireColor;
  }
  
  /// 获取选中颜色（根据主题）
  static Color getSelectedColor(BuildContext context) {
    return Theme.of(context).brightness == Brightness.dark 
        ? darkSelectedColor 
        : lightSelectedColor;
  }
}