// Copyright (C) 2022 WYATT GROUP
// Please see the AUTHORS file for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

import 'package:html/parser.dart';
import 'package:webfeed/webfeed.dart';
import 'package:wyatt_medium_feeds/src/reading_time.dart';

class MediumArticle {
  final RssItem? _item;

  RssItem get item {
    if (_item == null) {
      throw StateError('Feed has not been parsed yet.');
    }
    return _item!;
  }

  MediumArticle(this._item);

  String get title => item.title ?? '';

  String get link => item.link ?? '';

  String get guid => item.guid ?? '';

  String get author => item.dc?.creator ?? '';

  DateTime? get publishDate => item.pubDate;

  String get content => item.content?.value ?? '';

  List<String> get images {
    final images = <String>[];
    for (final i in item.content?.images ?? <String>[]) {
      images.add(i);
    }
    return images;
  }

  String get decoded {
    final document = parse(content);
    return document.firstChild?.text ?? '';
  }

  String get summary {
    final regex = RegExp(r'^.*?[\.!\?](?:\s|$)');
    final match = regex.firstMatch(decoded);
    return match?.group(0) ?? '';
  }

  Duration get readingTime {
    return decoded.readingTime();
  }
}