import 'package:flutter_test/flutter_test.dart';
import 'package:zenxercise/src/streak/reminders.dart';
import 'package:zenxercise/src/streak/streak.dart';

void main() {
  const evening = Reminder(enabled: true, minutes: 19 * 60);
  const late = Reminder(enabled: true, minutes: 22 * 60 + 30);

  Streak streak({bool todayDone = false, required DateTime now}) =>
      Streak.compute([if (todayDone) now.subtract(const Duration(minutes: 1))], now: now);

  test('both Reminders are planned for each of the next days', () {
    final now = DateTime(2026, 10, 29, 9);
    final planned = upcomingReminders(
      [evening, late],
      streak: streak(now: now),
      now: now,
      days: 2,
    );

    expect(planned.map((r) => r.at), [
      DateTime(2026, 10, 29, 19),
      DateTime(2026, 10, 29, 22, 30),
      DateTime(2026, 10, 30, 19),
      DateTime(2026, 10, 30, 22, 30),
    ]);
    expect(planned.map((r) => r.id).toSet(), hasLength(4));
  });

  test('a done day gets no Reminders, and times already past are skipped', () {
    final now = DateTime(2026, 10, 29, 20);
    final done = upcomingReminders(
      [evening, late],
      streak: streak(todayDone: true, now: now),
      now: now,
      days: 2,
    );
    final open = upcomingReminders(
      [evening, late],
      streak: streak(now: now),
      now: now,
      days: 1,
    );

    expect(done.map((r) => r.at), [DateTime(2026, 10, 30, 19), DateTime(2026, 10, 30, 22, 30)]);
    expect(open.map((r) => r.at), [DateTime(2026, 10, 29, 22, 30)]);
  });

  test('a switched-off Reminder is never planned', () {
    final now = DateTime(2026, 10, 29, 9);
    final planned = upcomingReminders(
      [evening, const Reminder(enabled: false, minutes: 22 * 60 + 30)],
      streak: streak(now: now),
      now: now,
      days: 2,
    );

    expect(planned.map((r) => r.at.hour), [19, 19]);
  });

  test('only today\'s Reminders mention the running Streak; later ones cannot know it', () {
    final now = DateTime(2026, 10, 29, 9);
    final s = Streak.compute([DateTime(2026, 10, 27, 18), DateTime(2026, 10, 28, 18)], now: now);

    final planned = upcomingReminders([evening], streak: s, now: now, days: 2);

    expect(planned.map((r) => r.streakDays), [2, null]);
  });
}