submanager/lib/widgets/themed_text.dart

import 'package:flutter/material.dart';
import '../theme/app_colors.dart';

/// 배경에 따라 자동으로 색상 대비를 조정하는 텍스트 위젯
class ThemedText extends StatelessWidget {
  final String text;
  final TextStyle? style;
  final TextAlign? textAlign;
  final TextOverflow? overflow;
  final int? maxLines;
  final bool softWrap;
  final bool forceLight;
  final bool forceDark;
  final double? opacity;
  final double? fontSize;
  final FontWeight? fontWeight;
  final double? letterSpacing;
  final Color? color;

  const ThemedText(
    this.text, {
    super.key,
    this.style,
    this.textAlign,
    this.overflow,
    this.maxLines,
    this.softWrap = true,
    this.forceLight = false,
    this.forceDark = false,
    this.opacity,
    this.fontSize,
    this.fontWeight,
    this.letterSpacing,
    this.color,
  });

  /// 배경 밝기에 따른 텍스트 색상 결정
  static Color getContrastColor(BuildContext context, {
    bool forceLight = false,
    bool forceDark = false,
  }) {
    if (forceLight) return AppColors.pureWhite;
    if (forceDark) return AppColors.darkNavy;
    
    final brightness = Theme.of(context).brightness;
    
    // 글래스모피즘 환경에서는 배경이 밝으므로 어두운 텍스트 사용
    if (_isGlassmorphicContext(context)) {
      return AppColors.darkNavy;  // color.md 가이드: 밝은 배경 위 어두운 텍스트
    }
    
    // 일반 환경
    return brightness == Brightness.dark 
        ? AppColors.pureWhite 
        : AppColors.darkNavy;
  }

  /// 글래스모피즘 컨텍스트인지 확인
  static bool _isGlassmorphicContext(BuildContext context) {
    // 부모 위젯 체인에서 글래스모피즘 카드가 있는지 확인
    final glassmorphic = context.findAncestorWidgetOfExactType<GlassmorphicIndicator>();
    return glassmorphic != null;
  }

  @override
  Widget build(BuildContext context) {
    final textColor = color ?? getContrastColor(
      context,
      forceLight: forceLight,
      forceDark: forceDark,
    );
    
    final finalColor = opacity != null 
        ? textColor.withValues(alpha: opacity!)
        : textColor;
    
    final defaultStyle = DefaultTextStyle.of(context).style;
    
    // 개별 스타일 속성들을 병합
    final baseStyle = TextStyle(
      fontSize: fontSize,
      fontWeight: fontWeight,
      letterSpacing: letterSpacing,
      color: finalColor,
    );
    
    final effectiveStyle = defaultStyle.merge(baseStyle).merge(style);
    
    return Text(
      text,
      style: effectiveStyle,
      textAlign: textAlign,
      overflow: overflow,
      maxLines: maxLines,
      softWrap: softWrap,
    );
  }

  /// 제목용 스타일 팩토리
  static ThemedText headline({
    required String text,
    TextStyle? style,
    bool forceLight = false,
    bool forceDark = false,
  }) {
    return ThemedText(
      text,
      style: const TextStyle(
        fontSize: 24,
        fontWeight: FontWeight.bold,
      ).merge(style),
      forceLight: forceLight,
      forceDark: forceDark,
    );
  }

  /// 부제목용 스타일 팩토리
  static ThemedText subtitle({
    required String text,
    TextStyle? style,
    bool forceLight = false,
    bool forceDark = false,
    double opacity = 0.8,
  }) {
    return ThemedText(
      text,
      style: const TextStyle(
        fontSize: 16,
        fontWeight: FontWeight.w500,
      ).merge(style),
      forceLight: forceLight,
      forceDark: forceDark,
      opacity: opacity,
    );
  }

  /// 본문용 스타일 팩토리
  static ThemedText body({
    required String text,
    TextStyle? style,
    bool forceLight = false,
    bool forceDark = false,
    double opacity = 0.9,
  }) {
    return ThemedText(
      text,
      style: const TextStyle(
        fontSize: 14,
        fontWeight: FontWeight.normal,
      ).merge(style),
      forceLight: forceLight,
      forceDark: forceDark,
      opacity: opacity,
    );
  }

  /// 캡션용 스타일 팩토리
  static ThemedText caption({
    required String text,
    TextStyle? style,
    bool forceLight = false,
    bool forceDark = false,
    double opacity = 0.7,
  }) {
    return ThemedText(
      text,
      style: const TextStyle(
        fontSize: 12,
        fontWeight: FontWeight.normal,
      ).merge(style),
      forceLight: forceLight,
      forceDark: forceDark,
      opacity: opacity,
    );
  }
}

/// 글래스모피즘 컨텍스트를 표시하는 마커 위젯
class GlassmorphicIndicator extends InheritedWidget {
  const GlassmorphicIndicator({
    super.key,
    required super.child,
  });

  static GlassmorphicIndicator? of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<GlassmorphicIndicator>();
  }

  @override
  bool updateShouldNotify(GlassmorphicIndicator oldWidget) => false;
}

/// 글래스모피즘 환경에서 텍스트 색상을 자동 조정하는 래퍼
class GlassmorphicTextWrapper extends StatelessWidget {
  final Widget child;
  
  const GlassmorphicTextWrapper({
    super.key,
    required this.child,
  });

  @override
  Widget build(BuildContext context) {
    return GlassmorphicIndicator(
      child: DefaultTextStyle(
        style: DefaultTextStyle.of(context).style.copyWith(
          color: ThemedText.getContrastColor(context),
        ),
        child: child,
      ),
    );
  }
}