import 'package:flutter/material.dart';
import '../../../../core/theme/app_spacing.dart';
import '../../../../core/theme/app_theme.dart';

/// 占位卡片组件
///
/// 当未选择币种时显示的占位提示卡片。
class PlaceholderCard extends StatelessWidget {
  final String message;
  final ColorScheme colorScheme;
  const PlaceholderCard({
    super.key,
    required this.message,
    required this.colorScheme,
  });

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(AppSpacing.xl),
      decoration: BoxDecoration(
        color: isDark
            ? colorScheme.surfaceContainer
            : colorScheme.surfaceContainerLowest,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(
          color: colorScheme.outlineVariant.withOpacity(0.15),
        ),
      ),
      child: Center(
        child: Text(message,
            style: AppTextStyles.headlineMedium(context).copyWith(
              color: colorScheme.onSurfaceVariant,
            )),
      ),
    );
  }
}