import 'package:flutter/material.dart';

import '../../data/db/app_database.dart';

/// reference 1건을 펼치기 카드로 표시.
///
/// 본 이슈 (#226) 에선 url 표시만 (탭 시 launcher 호출 X — #FF1 이후).
class ReferenceExpandCard extends StatelessWidget {
  const ReferenceExpandCard({super.key, required this.reference});

  final ReferenceRow reference;

  @override
  Widget build(BuildContext context) {
    final kindLabel = switch (reference.kind) {
      'paper' => '논문',
      'podcast_episode' => '팟캐스트',
      'book' => '서적',
      'url' => '웹',
      'korean_explainer' => '한국어 해설',
      _ => reference.kind,
    };
    return Card(
      child: ExpansionTile(
        title: Text(
          reference.title,
          maxLines: 2,
          overflow: TextOverflow.ellipsis,
        ),
        subtitle: Text(kindLabel,
            style: Theme.of(context).textTheme.bodySmall),
        children: [
          Padding(
            padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                if (reference.year != null)
                  _row(context, '연도', reference.year.toString()),
                if (reference.journal != null)
                  _row(context, '저널', reference.journal!),
                if (reference.publisher != null)
                  _row(context, '출판', reference.publisher!),
                if (reference.episodeNumber != null)
                  _row(context, '에피소드',
                      reference.episodeNumber.toString()),
                if (reference.doi != null) _row(context, 'DOI', reference.doi!),
                if (reference.url != null) _row(context, 'URL', reference.url!),
                if (reference.note != null)
                  _row(context, '메모', reference.note!),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _row(BuildContext context, String label, String value) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 2),
      child: Text.rich(TextSpan(children: [
        TextSpan(
          text: '$label: ',
          style: const TextStyle(fontWeight: FontWeight.bold),
        ),
        TextSpan(text: value),
      ]), style: Theme.of(context).textTheme.bodySmall),
    );
  }
}