import 'package:flutter_test/flutter_test.dart';
import 'package:marianum_mobile/background/widget_background_task.dart';

void main() {
  final now = DateTime(2026, 8, 6, 12, 0);

  group('shouldSkipRefresh', () {
    test('skips when the snapshot is younger than the debounce window', () {
      expect(
        shouldSkipRefresh(
          fetchedAt: now.subtract(const Duration(minutes: 5)),
          now: now,
          force: false,
        ),
        isTrue,
      );
    });

    test('refreshes when the snapshot is older than the debounce window', () {
      expect(
        shouldSkipRefresh(
          fetchedAt: now.subtract(const Duration(minutes: 15)),
          now: now,
          force: false,
        ),
        isFalse,
      );
    });

    test('refreshes exactly at the debounce boundary', () {
      expect(
        shouldSkipRefresh(
          fetchedAt: now.subtract(WidgetBackgroundTask.refreshDebounce),
          now: now,
          force: false,
        ),
        isFalse,
      );
    });

    test('force bypasses a fresh snapshot', () {
      expect(
        shouldSkipRefresh(
          fetchedAt: now.subtract(const Duration(minutes: 1)),
          now: now,
          force: true,
        ),
        isFalse,
      );
    });

    test('refreshes when no snapshot exists yet', () {
      expect(shouldSkipRefresh(fetchedAt: null, now: now, force: false), isFalse);
    });

    test('refreshes when fetchedAt lies in the future (clock change)', () {
      expect(
        shouldSkipRefresh(
          fetchedAt: now.add(const Duration(minutes: 5)),
          now: now,
          force: false,
        ),
        isFalse,
      );
    });
  });
}