import 'package:flutter_test/flutter_test.dart';
import 'package:pluriwave/estado/estado_alarmas.dart';
import 'package:pluriwave/modelos/alarma_musical.dart';
import 'package:pluriwave/servicios/servicio_alarmas.dart';
import 'package:pluriwave/servicios/servicio_alarmas_android.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../helpers/fakes_alarmas.dart';

/// Reported on-device: an alarm set for Monday 16:20 never rang, and the
/// "next alarm" banner showed a DIFFERENT alarm (the next morning's) instead.
///
/// Root cause: `finalizarEjecucion` ("Detener") anchored the completed
/// occurrence to `proximaEjecucion` with no check that it was the one
/// actually ringing. On the native-fire path the fire-time sync advances
/// `proximaEjecucion` to the NEXT occurrence BEFORE the user can reach the
/// ring screen — so stopping today's ring recorded NEXT week's occurrence as
/// already handled. `ServicioProgramacionAlarmas._esValida` then rejected
/// that occurrence for real, and the alarm silently jumped past it: it never
/// rang, and every sibling alarm outranked it in the banner.
///
/// This is the exact hazard `posponerAlarma` was fixed for in `9c7cf4e`
/// ("anchor snooze to the ringing occurrence, never a future one"). The guard
/// landed on the snooze path and never on the stop path, which sits directly
/// below it in the same file.
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  setUp(() {
    SharedPreferences.setMockInitialValues({});
  });

  AlarmaMusical semanalLunes(String id) => AlarmaMusical(
    id: id,
    nombre: 'Tarde del lunes',
    hora: 16,
    minuto: 20,
    tipoProgramacion: TipoProgramacionAlarma.diasSemana,
    diasSemana: const [DateTime.monday],
  );

  test('Detener cierra la ocurrencia que sonaba, no quema la siguiente '
      '(el nativo ya avanzó proximaEjecucion antes de que el usuario '
      'llegue a la pantalla)', () async {
    // Monday 2026-08-03.
    var ahora = DateTime(2026, 8, 3, 16, 0);
    final android = FakePuertoAlarmasAndroid();
    final estado = EstadoAlarmas(
      esPremium: () => true,
      servicio: ServicioAlarmas(reloj: () => ahora),
      android: android,
      iniciarAutomaticamente: false,
    );
    addTearDown(estado.dispose);
    addTearDown(android.dispose);

    await estado.guardarAlarma(semanalLunes('a1'));
    expect(
      estado.alarmas.single.proximaEjecucion,
      DateTime(2026, 8, 3, 16, 20),
    );

    // 16:20 — it rings. The native scheduler records the occurrence handled
    // and rearms; the cold-start sync brings that over, which advances
    // proximaEjecucion to NEXT Monday while the alarm is still ringing.
    ahora = DateTime(2026, 8, 3, 16, 20, 5);
    android.ejecucionesNativas.add(
      EjecucionAlarmaNativa(
        alarmaId: 'a1',
        gestionadaEn: DateTime(2026, 8, 3, 16, 20),
      ),
    );
    await estado.inicializar();

    expect(
      estado.alarmas.single.proximaEjecucion,
      DateTime(2026, 8, 10, 16, 20),
      reason: 'precondición: el nativo ya avanzó a la semana siguiente',
    );

    // NOW the user taps "Detener" on the ring screen.
    await estado.finalizarEjecucion('a1');

    expect(
      estado.alarmas.single.proximaEjecucion,
      DateTime(2026, 8, 10, 16, 20),
      reason:
          'Detener debe cerrar la ocurrencia que sonaba (hoy), no consumir '
          'la del lunes que viene empujándola a 2026-08-17',
    );
    expect(
      estado.alarmas.single.ultimaEjecucionGestionada,
      isNot(DateTime(2026, 8, 10, 16, 20)),
      reason:
          'marcar como gestionada una ocurrencia futura es justo lo que hace '
          'que _esValida la rechace y esa alarma no suene ese día',
    );
  });

  test('estado ya envenenado se cura solo: una ocurrencia futura marcada '
      'como gestionada se descarta al recalcular', () async {
    // Devices that ran the buggy build carry the poisoned value in
    // SharedPreferences. Without this, the fix would still leave the
    // affected alarm skipping one more time, with nothing in the UI to
    // explain it -- and the user would reasonably read that as "not fixed".
    final ahora = DateTime(2026, 8, 3, 9, 0);
    final servicio = ServicioAlarmas(reloj: () => ahora);

    // Saved by the buggy stop path: next Monday recorded as already handled.
    await servicio.guardarAlarma(
      semanalLunes(
        'a3',
      ).copyWith(ultimaEjecucionGestionada: DateTime(2026, 8, 10, 16, 20)),
    );

    final config = await servicio.recalcularTodas();
    final alarma = config.alarmas.single;

    expect(alarma.ultimaEjecucionGestionada, isNull);
    expect(
      alarma.proximaEjecucion,
      DateTime(2026, 8, 3, 16, 20),
      reason: 'y con el dato corrupto fuera, hoy vuelve a ser candidata',
    );
  });

  test('una ocurrencia gestionada REAL (pasada) se conserva: es la que evita '
      'que la alarma vuelva a sonar en el mismo minuto', () async {
    final ahora = DateTime(2026, 8, 3, 16, 20, 30);
    final servicio = ServicioAlarmas(reloj: () => ahora);
    final gestionada = DateTime(2026, 8, 3, 16, 20);

    await servicio.guardarAlarma(
      semanalLunes('a4').copyWith(ultimaEjecucionGestionada: gestionada),
    );

    final alarma = (await servicio.recalcularTodas()).alarmas.single;

    expect(alarma.ultimaEjecucionGestionada, gestionada);
    expect(
      alarma.proximaEjecucion,
      DateTime(2026, 8, 10, 16, 20),
      reason: 'la de hoy ya sonó, la siguiente es el lunes que viene',
    );
  });

  test(
    'Detener sin nada sonando tampoco consume la próxima ocurrencia',
    () async {
      // Defensive: the ring screen is the only production caller, but a stale
      // route or a duplicated stop event must not silently eat a day.
      var ahora = DateTime(2026, 8, 3, 9, 0);
      final android = FakePuertoAlarmasAndroid();
      final estado = EstadoAlarmas(
        esPremium: () => true,
        servicio: ServicioAlarmas(reloj: () => ahora),
        android: android,
        iniciarAutomaticamente: false,
      );
      addTearDown(estado.dispose);
      addTearDown(android.dispose);

      await estado.guardarAlarma(semanalLunes('a2'));
      expect(
        estado.alarmas.single.proximaEjecucion,
        DateTime(2026, 8, 3, 16, 20),
      );

      ahora = DateTime(2026, 8, 3, 9, 1);
      await estado.finalizarEjecucion('a2');

      expect(
        estado.alarmas.single.proximaEjecucion,
        DateTime(2026, 8, 3, 16, 20),
        reason: 'a las 09:01 la ocurrencia de las 16:20 no está sonando',
      );
    },
  );
}