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

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,
    ),
  );
}

class AppTheme {
  AppTheme._();

  static const Color primary = AppColors.primary;
  static const Color primaryLight = AppColors.primaryLight;
  static const Color primaryDark = AppColors.primaryDark;
  static const Color primaryMid = AppColors.blueMeasure;
  static const Color accent = AppColors.success;
  static const Color info = AppColors.blueMeasure;

  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.divider;

  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;

  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;

  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;

  static BoxShadow get shadowCard => BoxShadow(
    color: const Color(0xFF101828).withValues(alpha: 0.07),
    blurRadius: 22,
    offset: const Offset(0, 10),
  );

  static BoxShadow get shadowLight => BoxShadow(
    color: const Color(0xFF101828).withValues(alpha: 0.045),
    blurRadius: 14,
    offset: const Offset(0, 6),
  );

  static BoxShadow get shadowElevated => BoxShadow(
    color: primary.withValues(alpha: 0.12),
    blurRadius: 18,
    offset: const Offset(0, 8),
  );

  static BoxShadow get shadowButton => BoxShadow(
    color: primary.withValues(alpha: 0.22),
    blurRadius: 16,
    offset: const Offset(0, 8),
  );

  static const Map<String, Color> agentColors = {
    'default': Color(0xFFF3F0FF),
    'consultation': Color(0xFFEFF5FF),
    'health': Color(0xFFF3F0FF),
    'diet': Color(0xFFFFF7E6),
    'medication': Color(0xFFEFF5FF),
    'report': Color(0xFFF6F3FF),
    'exercise': Color(0xFFEFF8FF),
  };

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

  static ThemeData get lightTheme => ThemeData(
    useMaterial3: true,
    colorScheme: ColorScheme.fromSeed(
      seedColor: primary,
      primary: primary,
      primaryContainer: primaryLight,
      onPrimary: Colors.white,
      secondary: AppColors.blueMeasure,
      surface: surface,
      brightness: Brightness.light,
    ),
    scaffoldBackgroundColor: bg,
    splashColor: primary.withValues(alpha: 0.06),
    highlightColor: Colors.transparent,
    hoverColor: primaryLight.withValues(alpha: 0.55),
    fontFamily: null,

    appBarTheme: const AppBarTheme(
      backgroundColor: surface,
      foregroundColor: text,
      elevation: 0,
      centerTitle: true,
      scrolledUnderElevation: 0,
      surfaceTintColor: Colors.transparent,
      titleTextStyle: TextStyle(
        fontSize: 17,
        fontWeight: FontWeight.w700,
        color: text,
      ),
      toolbarHeight: 48,
    ),

    cardTheme: CardThemeData(
      color: surface,
      elevation: 0,
      surfaceTintColor: Colors.transparent,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(rLg),
        side: const BorderSide(color: border),
      ),
      margin: EdgeInsets.zero,
    ),

    inputDecorationTheme: InputDecorationTheme(
      filled: true,
      fillColor: Colors.white,
      contentPadding: const EdgeInsets.symmetric(horizontal: sLg, vertical: 13),
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(rMd),
        borderSide: const BorderSide(color: border),
      ),
      enabledBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(rMd),
        borderSide: const BorderSide(color: border),
      ),
      focusedBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(rMd),
        borderSide: const BorderSide(color: primary, width: 1.2),
      ),
      errorBorder: OutlineInputBorder(
        borderRadius: BorderRadius.circular(rMd),
        borderSide: const BorderSide(color: error),
      ),
      hintStyle: const TextStyle(color: textHint, fontSize: 15),
    ),

    elevatedButtonTheme: ElevatedButtonThemeData(
      style: ElevatedButton.styleFrom(
        backgroundColor: primary,
        foregroundColor: Colors.white,
        minimumSize: const Size(double.infinity, 50),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rMd)),
        textStyle: const TextStyle(fontSize: 16, fontWeight: FontWeight.w700),
        elevation: 0,
      ),
    ),

    outlinedButtonTheme: OutlinedButtonThemeData(
      style: OutlinedButton.styleFrom(
        foregroundColor: text,
        side: const BorderSide(color: border),
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rMd)),
        textStyle: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
      ),
    ),

    dialogTheme: DialogThemeData(
      backgroundColor: surface,
      surfaceTintColor: Colors.transparent,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(rLg)),
    ),

    textTheme: const TextTheme(
      headlineLarge: TextStyle(
        fontSize: 24,
        fontWeight: FontWeight.w800,
        color: text,
      ),
      titleLarge: TextStyle(
        fontSize: 18,
        fontWeight: FontWeight.w700,
        color: text,
      ),
      titleMedium: TextStyle(
        fontSize: 16,
        fontWeight: FontWeight.w600,
        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),
    ),
  );

  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: AppColors.blueMeasure,
      accentForeground: Colors.white,
      destructive: error,
      destructiveForeground: Colors.white,
      border: border,
      input: border,
      ring: primary,
      selection: primaryLight,
    ),
    radius: BorderRadius.circular(rMd),
  );
}