import 'package:flutter/material.dart';

import '../../domain/catalog/catalog_item.dart';

class CatalogCard extends StatelessWidget {
  const CatalogCard({super.key, required this.item, required this.onTap});

  final CatalogItem item;
  final VoidCallback onTap;

  @override
  Widget build(BuildContext context) {
    final dc = item.displayCategory;
    return Semantics(
      label: '${dc.label} 카테고리. ${item.title}. ${item.summary}',
      button: true,
      child: Card(
        clipBehavior: Clip.antiAlias,
        child: InkWell(
          onTap: onTap,
          child: Padding(
            padding: const EdgeInsets.all(12),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.min,
              children: [
                Row(
                  children: [
                    Icon(dc.icon, size: 18),
                    const SizedBox(width: 6),
                    Expanded(
                      child: Text(
                        item.title,
                        style: Theme.of(context).textTheme.titleMedium,
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                      ),
                    ),
                  ],
                ),
                if (item.titleEn != null) ...[
                  const SizedBox(height: 2),
                  Text(
                    item.titleEn!,
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                          color: Colors.grey,
                        ),
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                  ),
                ],
                const SizedBox(height: 8),
                Expanded(
                  child: Text(
                    item.summary,
                    style: Theme.of(context).textTheme.bodySmall,
                    maxLines: 3,
                    overflow: TextOverflow.ellipsis,
                  ),
                ),
                if (item.evidenceStrength != null) ...[
                  const SizedBox(height: 6),
                  _EvidenceBadge(strength: item.evidenceStrength!),
                ],
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class _EvidenceBadge extends StatelessWidget {
  const _EvidenceBadge({required this.strength});

  final String strength;

  @override
  Widget build(BuildContext context) {
    final (label, color) = switch (strength) {
      'strong_rct' || 'strong' => ('근거 강함', Colors.green),
      'meta_analysis' => ('메타분석', Colors.teal),
      'moderate' => ('근거 중간', Colors.blue),
      'observational' => ('관찰연구', Colors.blueGrey),
      'mechanistic' => ('기전', Colors.orange),
      'expert_opinion' => ('전문가 의견', Colors.brown),
      'mixed' => ('근거 혼재', Colors.amber),
      'weak' => ('근거 약함', Colors.grey),
      _ => (strength, Colors.grey),
    };
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
      decoration: BoxDecoration(
        color: color.withValues(alpha: 0.15),
        border: Border.all(color: color),
        borderRadius: BorderRadius.circular(4),
      ),
      child: Text(
        label,
        style: TextStyle(fontSize: 11, color: color),
      ),
    );
  }
}