AI-Health/health_app/lib/core/app_theme.dart

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

/// 渐变背景 Scaffold（紫→蓝 4:6 渐变）
class GradientScaffold extends StatelessWidget {
  final PreferredSizeWidget? appBar;
  final Widget? body;
  final Widget? floatingActionButton;
  final Widget? drawer;
  final Widget? bottomNavigationBar;
  final bool extendBody;
  const GradientScaffold({super.key, this.appBar, this.body, this.floatingActionButton, this.drawer, this.bottomNavigationBar, this.extendBody = false});

  @override Widget build(BuildContext context) => Container(
    decoration: const BoxDecoration(gradient: AppColors.bgGradient),
    child: Scaffold(
      backgroundColor: Colors.transparent,
      appBar: appBar,
      body: body,
      floatingActionButton: floatingActionButton,
      drawer: drawer,
      bottomNavigationBar: bottomNavigationBar,
      extendBody: extendBody,
    ),
  );
}

/// 健康管家 — 设计规范 v1.0：紫色系 + 干净白灰 + 12px圆角
class AppTheme {
  AppTheme._();

  // ── 主色调 ──
  static const Color primary = AppColors.primary;
  static const Color primaryLight = AppColors.primaryLight;
  static const Color primaryDark = AppColors.primaryDark;
  static const Color primaryMid = AppColors.primaryMid;
  static const Color accent = AppColors.success;
  static const Color info = AppColors.blueMeasure;

  // ── 中性色 ──
  static const Color bg = AppColors.background;
  static const Color bgSoft = AppColors.backgroundSoft;
  static const Color surface = AppColors.cardBackground;
  static const Color surfaceInner = AppColors.cardInner;
  static const Color text = AppColors.textPrimary;
  static const Color textSub = AppColors.textSecondary;
  static const Color textHint = AppColors.textHint;
  static const Color border = AppColors.border;
  static const Color divider = AppColors.borderLight;

  // ── 语义色 ──
  static const Color success = AppColors.success;
  static const Color successLight = AppColors.successLight;
  static const Color error = AppColors.error;
  static const Color errorLight = AppColors.errorLight;
  static const Color warning = AppColors.warning;
  static const Color warningLight = AppColors.warningLight;

  // ── 圆角（规范：12px 卡片）──
  static const double rXs = 4;
  static const double rSm = 8;
  static const double rMd = 12;
  static const double rLg = 16;
  static const double rXl = 20;
  static const double rPill = 999;

  // ── 间距（8px 网格）──
  static const double sXs = 4;
  static const double sSm = 8;
  static const double sMd = 12;
  static const double sLg = 16;
  static const double sXl = 20;
  static const double sXxl = 24;

  // ── 阴影（轻阴影）──
  static BoxShadow get shadowCard => BoxShadow(
        color: Colors.black.withOpacity(0.06),
        blurRadius: 8,
        offset: const Offset(0, 2),
      );
  static BoxShadow get shadowLight => BoxShadow(
        color: Colors.black.withOpacity(0.04),
        blurRadius: 6,
        offset: const Offset(0, 1),
      );
  static BoxShadow get shadowElevated => BoxShadow(
        color: primary.withOpacity(0.08),
        blurRadius: 12,
        offset: const Offset(0, 4),
      );
  static BoxShadow get shadowButton => BoxShadow(
        color: primary.withOpacity(0.25),
        blurRadius: 12,
        offset: const Offset(0, 4),
      );

  // ── 智能体配色 ──
  static const Map<String, Color> agentColors = {
    'default': Color(0xFFEDE9FE),
    'consultation': Color(0xFFE0E7FF),
    'health': Color(0xFFD1FAE5),
    'diet': Color(0xFFFEF3C7),
    'medication': Color(0xFFFEE2E2),
    'report': Color(0xFFDBEAFE),
    'exercise': Color(0xFFEDE9FE),
  };

  static Color agentLight(String? name) => agentColors[name] ?? primaryLight;

  // ── Material 主题 ──
  static ThemeData get lightTheme => ThemeData(
        useMaterial3: true,
        colorScheme: ColorScheme.fromSeed(
          seedColor: primary,
          primary: primary,
          primaryContainer: primaryLight,
          onPrimary: Colors.white,
          secondary: accent,
          surface: surface,
          brightness: Brightness.light,
        ),
        scaffoldBackgroundColor: bg,
        splashColor: Colors.transparent,
        highlightColor: Colors.transparent,
        hoverColor: primaryLight.withOpacity(0.3),
        fontFamily: null,

        appBarTheme: AppBarTheme(
          backgroundColor: surface,
          foregroundColor: text,
          elevation: 0,
          centerTitle: true,
          scrolledUnderElevation: 0,
          titleTextStyle: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: text),
          toolbarHeight: 44,
        ),

        cardTheme: CardThemeData(
          color: surface,
          elevation: 0,
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rMd)),
          margin: EdgeInsets.zero,
        ),

        inputDecorationTheme: InputDecorationTheme(
          filled: true,
          fillColor: bgSoft,
          contentPadding: const EdgeInsets.symmetric(horizontal: sLg, vertical: 12),
          border: OutlineInputBorder(
            borderRadius: BorderRadius.circular(10),
            borderSide: BorderSide.none,
          ),
          enabledBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(10),
            borderSide: BorderSide.none,
          ),
          focusedBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(10),
            borderSide: const BorderSide(color: primary, width: 1),
          ),
          hintStyle: TextStyle(color: textHint, fontSize: 15),
        ),

        elevatedButtonTheme: ElevatedButtonThemeData(
          style: ElevatedButton.styleFrom(
            backgroundColor: primary,
            foregroundColor: Colors.white,
            minimumSize: const Size(double.infinity, 52),
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rMd)),
            textStyle: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
            elevation: 0,
          ),
        ),

        dialogTheme: DialogThemeData(shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rLg))),

        textTheme: const TextTheme(
          headlineLarge: TextStyle(fontSize: 24, fontWeight: FontWeight.w700, color: text),
          titleLarge: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: text),
          titleMedium: TextStyle(fontSize: 16, fontWeight: FontWeight.w500, color: text),
          bodyLarge: TextStyle(fontSize: 15, color: text, height: 1.5),
          bodyMedium: TextStyle(fontSize: 13, color: textSub, height: 1.4),
          labelMedium: TextStyle(fontSize: 13, color: textSub),
          labelSmall: TextStyle(fontSize: 12, color: textHint),
        ),
      );

  // ── Shadcn UI 主题 ──
  static ShadThemeData get shadTheme => ShadThemeData(
        brightness: Brightness.light,
        colorScheme: ShadVioletColorScheme.light(
          background: bg,
          foreground: text,
          card: surface,
          cardForeground: text,
          popover: surface,
          popoverForeground: text,
          primary: primary,
          primaryForeground: Colors.white,
          secondary: primaryLight,
          secondaryForeground: primaryDark,
          muted: bgSoft,
          mutedForeground: textSub,
          accent: accent,
          accentForeground: Colors.white,
          destructive: error,
          destructiveForeground: Colors.white,
          border: border,
          input: border,
          ring: primary,
          selection: primaryLight,
        ),
        radius: BorderRadius.circular(rMd),
      );
}