import 'TimelineIdentifiers.dart';
import 'entry_tree_item.dart';

class Timeline {
  final TimelineIdentifiers id;
  final List<EntryTreeItem> _posts = [];
  final Set<EntryTreeItem> _postsSet = {};
  int _lowestStatusId = 0;
  int _highestStatusId = 0;

  int get highestStatusId => _highestStatusId;

  Timeline(this.id, {List<EntryTreeItem>? initialPosts}) {
    if (initialPosts != null) {
      addPosts(initialPosts);
    }
  }

  List<EntryTreeItem> get posts => List.unmodifiable(_posts);

  void addPosts(List<EntryTreeItem> newPosts) {
    for (final p in newPosts) {
      final id = int.parse(p.id);
      if (_lowestStatusId > id) {
        _lowestStatusId = id;
      }

      if (_highestStatusId < id) {
        _highestStatusId = id;
      }
      _postsSet.add(p);
    }
    _posts.clear();
    _posts.addAll(_postsSet);
    _posts.sort((p1, p2) {
      return p2.entry.backdatedTimestamp.compareTo(p1.entry.backdatedTimestamp);
    });
  }

  void clear() {
    _posts.clear();
    _postsSet.clear();
    _lowestStatusId = 0;
    _highestStatusId = 0;
  }

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is Timeline && runtimeType == other.runtimeType && id == other.id;

  @override
  int get hashCode => id.hashCode;
}