import 'package:flutter/material.dart';

import '../theme/app_theme.dart';

/// Shown when market is the only enabled source but no market question is ready.
class MarketQuestionPlaceholder extends StatelessWidget {
  const MarketQuestionPlaceholder({
    super.key,
    this.onRetry,
    this.busy = false,
  });

  final VoidCallback? onRetry;
  final bool busy;

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ConstrainedBox(
        constraints: const BoxConstraints(maxWidth: 360),
        child: Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Icon(
                Icons.show_chart,
                size: 56,
                color: AppColors.accent.withValues(alpha: 0.85),
              ),
              const SizedBox(height: 16),
              Text(
                'No market question ready',
                style: Theme.of(context).textTheme.titleLarge,
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: 8),
              Text(
                'Spelling is turned off. A new market question will appear when '
                'prospective data is available—try again in a moment.',
                style: Theme.of(context).textTheme.bodyLarge,
                textAlign: TextAlign.center,
              ),
              if (onRetry != null) ...<Widget>[
                const SizedBox(height: 20),
                FilledButton.icon(
                  key: const Key('market-placeholder-retry'),
                  onPressed: busy ? null : onRetry,
                  icon: busy
                      ? const SizedBox(
                          width: 18,
                          height: 18,
                          child: CircularProgressIndicator(strokeWidth: 2),
                        )
                      : const Icon(Icons.refresh, size: 18),
                  label: const Text('Try again'),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }
}