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

/// 健康管家 — 清爽紫蓝风
class AppTheme {
  AppTheme._();

  // ── 主色调 ──
  static const Color primary      = AppColors.primaryPurple;
  static const Color primaryLight = AppColors.iconBackground;
  static const Color primaryDark  = AppColors.iconColor;
  static const Color primaryGlow  = AppColors.purpleGradientStart;

  // ── 中性色 ──
  static const Color bg       = AppColors.backgroundSecondary;
  static const Color surface  = AppColors.cardBackground;
  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 error   = AppColors.error;
  static const Color warning = AppColors.warning;
  static const Color accent  = AppColors.primaryBlue;
  static const Color info    = AppColors.primaryBlue;

  // ── 圆角 ──
  static const double rXs  = 6;
  static const double rSm  = 10;
  static const double rMd  = 14;
  static const double rLg  = 20;
  static const double rXl  = 28;
  static const double rPill = 999;

  // ── 间距 ──
  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 = 28;

  // ── 阴影 ──
  static BoxShadow get shadowCard =>
      BoxShadow(color: primary.withAlpha(14), blurRadius: 20, offset: const Offset(0, 4));
  static BoxShadow get shadowLight =>
      BoxShadow(color: primary.withAlpha(8), blurRadius: 12, offset: const Offset(0, 2));
  static BoxShadow get shadowElevated =>
      BoxShadow(color: primary.withAlpha(20), blurRadius: 30, offset: const Offset(0, 8));

  // ── 智能体配色 ──
  static const Map<String, Color> agentColors = {
    'default':      AppColors.iconBackground,
    'consultation': Color(0xFFE0F0FF),
    'health':       Color(0xFFE8FFE8),
    'diet':         Color(0xFFFFF0E0),
    'medication':   Color(0xFFFFE8EC),
    'report':       Color(0xFFE8F0FF),
    'exercise':     Color(0xFFF0E8FF),
  };

  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,
          surface: bg,
          brightness: Brightness.light,
        ),
        scaffoldBackgroundColor: bg,
        fontFamily: null,

        appBarTheme: const AppBarTheme(
          backgroundColor: surface,
          foregroundColor: text,
          elevation: 0,
          centerTitle: true,
          scrolledUnderElevation: 0,
          titleTextStyle: TextStyle(fontSize: 23, fontWeight: FontWeight.w600, color: text),
        ),

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

        inputDecorationTheme: InputDecorationTheme(
          filled: true,
          fillColor: bg,
          contentPadding: const EdgeInsets.symmetric(horizontal: sLg, vertical: 16),
          border: OutlineInputBorder(borderRadius: BorderRadius.circular(rMd), borderSide: BorderSide.none),
          enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(rMd), borderSide: BorderSide.none),
          focusedBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(rMd),
            borderSide: const BorderSide(color: primary, width: 2),
          ),
          hintStyle: const TextStyle(color: textHint, fontSize: 20),
        ),

        elevatedButtonTheme: ElevatedButtonThemeData(
          style: ElevatedButton.styleFrom(
            backgroundColor: primary,
            foregroundColor: Colors.white,
            minimumSize: const Size(double.infinity, 56),
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rPill)),
            textStyle: const TextStyle(fontSize: 21, fontWeight: FontWeight.w600),
            elevation: 0,
          ),
        ),

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

        textTheme: const TextTheme(
          headlineLarge: TextStyle(fontSize: 32, fontWeight: FontWeight.w700, color: text, letterSpacing: -0.5),
          titleLarge:  TextStyle(fontSize: 23, fontWeight: FontWeight.w600, color: text),
          titleMedium: TextStyle(fontSize: 21, fontWeight: FontWeight.w600, color: text),
          bodyLarge:   TextStyle(fontSize: 21, color: text, height: 1.5),
          bodyMedium:  TextStyle(fontSize: 20, color: textSub, height: 1.4),
          labelMedium: TextStyle(fontSize: 18, color: textSub),
          labelSmall:  TextStyle(fontSize: 16, color: textHint),
        ),
      );

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