superport/lib/screens/common/widgets/standard_states.dart

import 'package:flutter/material.dart';
import 'package:superport/screens/common/theme_shadcn.dart';
import 'package:superport/screens/common/components/shadcn_components.dart';

/// 표준 로딩 상태 위젯
class StandardLoadingState extends StatelessWidget {
  final String message;
  
  const StandardLoadingState({
    super.key,
    this.message = '데이터를 불러오는 중...',
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          CircularProgressIndicator(
            color: ShadcnTheme.primary,
            strokeWidth: 3,
          ),
          const SizedBox(height: ShadcnTheme.spacing4),
          Text(
            message,
            style: ShadcnTheme.bodyMuted,
          ),
        ],
      ),
    );
  }
}

/// 표준 에러 상태 위젯
class StandardErrorState extends StatelessWidget {
  final String title;
  final String? message;
  final VoidCallback? onRetry;
  final IconData icon;
  
  const StandardErrorState({
    super.key,
    this.title = '오류가 발생했습니다',
    this.message,
    this.onRetry,
    this.icon = Icons.error_outline,
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Container(
        padding: const EdgeInsets.all(ShadcnTheme.spacing6),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(
              icon,
              size: 64,
              color: ShadcnTheme.destructive.withValues(alpha: 0.8),
            ),
            const SizedBox(height: ShadcnTheme.spacing4),
            Text(
              title,
              style: ShadcnTheme.headingH4,
              textAlign: TextAlign.center,
            ),
            if (message != null) ...[
              const SizedBox(height: ShadcnTheme.spacing2),
              Text(
                message!,
                style: ShadcnTheme.bodyMuted,
                textAlign: TextAlign.center,
              ),
            ],
            if (onRetry != null) ...[
              const SizedBox(height: ShadcnTheme.spacing6),
              ShadcnButton(
                text: '다시 시도',
                onPressed: onRetry,
                variant: ShadcnButtonVariant.primary,
                textColor: Colors.white,
                icon: const Icon(Icons.refresh, size: 16),
              ),
            ],
          ],
        ),
      ),
    );
  }
}

/// 표준 빈 상태 위젯
class StandardEmptyState extends StatelessWidget {
  final String title;
  final String? message;
  final Widget? action;
  final IconData icon;
  
  const StandardEmptyState({
    super.key,
    this.title = '데이터가 없습니다',
    this.message,
    this.action,
    this.icon = Icons.inbox_outlined,
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Container(
        padding: const EdgeInsets.all(ShadcnTheme.spacing8),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(
              icon,
              size: 64,
              color: ShadcnTheme.mutedForeground.withValues(alpha: 0.5),
            ),
            const SizedBox(height: ShadcnTheme.spacing4),
            Text(
              title,
              style: ShadcnTheme.headingH4.copyWith(
                color: ShadcnTheme.mutedForeground,
              ),
              textAlign: TextAlign.center,
            ),
            if (message != null) ...[
              const SizedBox(height: ShadcnTheme.spacing2),
              Text(
                message!,
                style: ShadcnTheme.bodyMuted,
                textAlign: TextAlign.center,
              ),
            ],
            if (action != null) ...[
              const SizedBox(height: ShadcnTheme.spacing6),
              action!,
            ],
          ],
        ),
      ),
    );
  }
}

/// 표준 정보 메시지 위젯
class StandardInfoMessage extends StatelessWidget {
  final String message;
  final IconData icon;
  final Color? color;
  final VoidCallback? onClose;
  
  const StandardInfoMessage({
    super.key,
    required this.message,
    this.icon = Icons.info_outline,
    this.color,
    this.onClose,
  });

  @override
  Widget build(BuildContext context) {
    final displayColor = color ?? ShadcnTheme.primary;
    
    return Container(
      padding: const EdgeInsets.all(ShadcnTheme.spacing3),
      decoration: BoxDecoration(
        color: displayColor.withValues(alpha: 0.1),
        borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
        border: Border.all(
          color: displayColor.withValues(alpha: 0.3),
        ),
      ),
      child: Row(
        children: [
          Icon(
            icon,
            size: 20,
            color: displayColor,
          ),
          const SizedBox(width: ShadcnTheme.spacing2),
          Expanded(
            child: Text(
              message,
              style: TextStyle(
                color: displayColor,
                fontSize: 14,
              ),
            ),
          ),
          if (onClose != null)
            IconButton(
              icon: Icon(
                Icons.close,
                size: 16,
                color: displayColor,
              ),
              onPressed: onClose,
              padding: EdgeInsets.zero,
              constraints: const BoxConstraints(
                maxHeight: 24,
                maxWidth: 24,
              ),
            ),
        ],
      ),
    );
  }
}

/// 표준 통계 카드 위젯
class StandardStatCard extends StatelessWidget {
  final String title;
  final String value;
  final IconData icon;
  final Color color;
  final String? subtitle;
  
  const StandardStatCard({
    super.key,
    required this.title,
    required this.value,
    required this.icon,
    required this.color,
    this.subtitle,
  });

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(ShadcnTheme.spacing5),
      decoration: BoxDecoration(
        color: ShadcnTheme.card,
        borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
        border: Border.all(color: Colors.black),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.05),
            blurRadius: 10,
            offset: const Offset(0, 4),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  color: color.withValues(alpha: 0.1),
                  borderRadius: BorderRadius.circular(ShadcnTheme.radiusSm),
                ),
                child: Icon(
                  icon,
                  size: 20,
                  color: color,
                ),
              ),
              const SizedBox(width: ShadcnTheme.spacing3),
              Expanded(
                child: Text(
                  title,
                  style: ShadcnTheme.bodySmall.copyWith(
                    color: ShadcnTheme.mutedForeground,
                  ),
                  overflow: TextOverflow.ellipsis,
                ),
              ),
            ],
          ),
          const SizedBox(height: ShadcnTheme.spacing3),
          Text(
            value,
            style: ShadcnTheme.headingH3.copyWith(
              color: color,
              fontWeight: FontWeight.bold,
            ),
          ),
          if (subtitle != null) ...[
            const SizedBox(height: ShadcnTheme.spacing1),
            Text(
              subtitle!,
              style: ShadcnTheme.bodySmall.copyWith(
                color: ShadcnTheme.mutedForeground,
              ),
            ),
          ],
        ],
      ),
    );
  }
}