import 'package:signals/signals.dart';

import '../../database/database.dart';

/// Which pages the reader has bookmarked. Only the set of addresses is held
/// here, because that is all the chrome watches; the list itself is read from
/// the database whenever a page needs it.
class BookmarksController {
  BookmarksController(this._db);

  final MewsDatabase _db;

  final bookmarkedUrls = signal(<String>{});

  Future<void> load() async {
    final rows = await _db.allBookmarks();
    bookmarkedUrls.value = rows.map((row) => row.url).toSet();
  }

  bool isBookmarked(String url) => bookmarkedUrls.value.contains(url);

  Future<void> toggle(String url, String? title) async {
    if (isBookmarked(url)) {
      await remove(url);
      return;
    }
    await _db.addBookmark(url, title);
    bookmarkedUrls.value = {...bookmarkedUrls.value, url};
  }

  Future<void> remove(String url) async {
    await _db.removeBookmark(url);
    bookmarkedUrls.value = {...bookmarkedUrls.value}..remove(url);
  }
}