import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';

import '../support/eventually.dart';

void main() {
  late List<String> deleted;
  late DelayedDeletions deletions;

  setUp(() {
    deleted = [];
    deletions = DelayedDeletions(
      (id) async => deleted.add(id),
      undoWindow: const Duration(milliseconds: 10),
    );
  });
  tearDown(() => deletions.dispose());

  test('a held deletion waits past the time to undo, until it is let go: '
      'then it takes its time to undo', () async {
    deletions.hold('a');
    await Future<void>.delayed(const Duration(milliseconds: 50));
    expect(deletions.pending, {'a'});
    expect(deleted, isEmpty);

    deletions.delete('a');
    expect(deletions.pending, {'a'});
    await eventually(() => deletions.pending.isEmpty);
    expect(deleted, ['a']);
  });

  test('a held deletion can be undone', () async {
    deletions
      ..hold('a')
      ..undo('a');
    expect(deletions.pending, isEmpty);
    await Future<void>.delayed(const Duration(milliseconds: 50));
    expect(deleted, isEmpty);
  });

  test('closing drops a held deletion: the item stays', () async {
    deletions.hold('a');
    await deletions.dispose();
    await Future<void>.delayed(const Duration(milliseconds: 50));

    expect(deleted, isEmpty);
    deletions = DelayedDeletions((id) async {});
  });
}