import 'package:flutter_test/flutter_test.dart';
import 'package:ignis_app/features/schedules/schedule_form_logic.dart';

void main() {
  test('default once time rounds forward and stays in future', () {
    final now = DateTime(2026, 5, 1, 10, 2);

    final result = defaultOnceScheduleTime(now: now);

    expect(result, DateTime(2026, 5, 1, 14, 5));
    expect(result.isAfter(now), isTrue);
  });

  test('once validation rejects missing and past dates', () {
    final now = DateTime(2026, 5, 1, 10, 0);

    expect(validateOnceSchedule(null, now: now), 'Выберите дату и время');
    expect(
      validateOnceSchedule(now.add(const Duration(seconds: 30)), now: now),
      'Нужна дата хотя бы на минуту вперёд',
    );
    expect(
      validateOnceSchedule(now.add(const Duration(minutes: 2)), now: now),
      isNull,
    );
  });

  test('cron weekday serialization and descriptions stay human readable', () {
    expect(serializeCronWeekdays({0, 1, 2, 3, 4, 5, 6}), '*');
    expect(serializeCronWeekdays({1, 5, 0}), '0,1,5');
    expect(describeCronWeekdays({1, 2, 3, 4, 5}), 'Пн, Вт, Ср, Чт, Пт');
    expect(describeCronWeekdaysExpression('*'), 'каждый день');
    expect(describeCronWeekdaysExpression('1,5,0'), 'Пн, Пт, Вс');
  });

  test('format runAt converts utc timestamp to local label', () {
    final label = formatRunAtLabel('2026-05-01T12:30:00Z');

    expect(label, isNotEmpty);
    expect(label.contains('2026'), isTrue);
    expect(label.contains('12:30') || label.contains('19:30'), isTrue);
  });
}