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

/// 健康管家 — 淡紫清新风
class AppTheme {
  AppTheme._();

  // ── 主色调：柔和紫 ──
  static const Color primary      = Color(0xFF7C6FF7); // 柔紫
  static const Color primaryLight = Color(0xFFEDEAFF); // 浅薰衣草
  static const Color primaryDark  = Color(0xFF4A3FBE); // 深紫
  static const Color primaryGlow  = Color(0xFFD9D4FF); // 发光紫

  // ── 中性色 ──
  static const Color bg       = Color(0xFFFAF9FF); // 淡紫白
  static const Color surface  = Color(0xFFFFFFFF);
  static const Color text     = Color(0xFF1E1B2E); // 紫黑
  static const Color textSub  = Color(0xFF6E6B82); // 灰紫
  static const Color textHint = Color(0xFFB5B2C8); // 浅灰紫
  static const Color border   = Color(0xFFE8E6F0);
  static const Color divider  = Color(0xFFF4F2FA);

  // ── 语义色 ──
  static const Color success = Color(0xFF52B788); // 翠绿
  static const Color error   = Color(0xFFE85D75); // 柔红
  static const Color warning = Color(0xFFF5B041); // 暖琥珀
  static const Color accent  = Color(0xFFA78BFA); // 中紫
  static const Color info    = Color(0xFF7C6FF7); // 柔紫

  // ── 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':      Color(0xFFEDEAFF), // 淡紫
    'consultation': Color(0xFFE0F0FF), // 淡天蓝
    'health':       Color(0xFFE8FFE8), // 淡翠绿
    'diet':         Color(0xFFFFF0E0), // 淡杏
    'medication':   Color(0xFFFFE8EC), // 淡粉
    'report':       Color(0xFFE8F0FF), // 淡水蓝
    'exercise':     Color(0xFFF0E8FF), // 淡紫
  };

  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: Color(0xFFF4F2FA),
          secondaryForeground: text,
          muted: Color(0xFFF4F2FA),
          mutedForeground: textSub,
          accent: accent,
          accentForeground: Colors.white,
          destructive: error,
          destructiveForeground: Colors.white,
          border: border,
          input: border,
          ring: primary,
          selection: Color(0xFFD9D4FF),
        ),
        radius: BorderRadius.circular(rMd),
      );
}