pluriwave/lib/app.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'estado/estado_busqueda.dart';
import 'estado/estado_ecualizador.dart';
import 'estado/estado_grabacion.dart';
import 'estado/estado_radio.dart';
import 'estado/estado_alarmas.dart';
import 'estado/estado_idioma.dart';
import 'estado/estado_navegacion.dart';
import 'l10n/display_names.dart';
import 'l10n/gen/app_localizations.dart';
import 'modelos/alarma_musical.dart';
import 'pantallas/pantalla_alarmas.dart';
import 'pantallas/pantalla_alarma_sonando.dart';
import 'pantallas/pantalla_inicio.dart';
import 'pantallas/pantalla_buscar.dart';
import 'pantallas/pantalla_favoritos.dart';
import 'pantallas/pantalla_ajustes.dart';
import 'tema/pluriwave_theme.dart';
import 'widgets/pluri_bottom_navigation.dart';
import 'widgets/pluri_icon.dart';
import 'widgets/pluri_layout.dart';
import 'widgets/pluri_onboarding_dialog.dart';
import 'widgets/pluri_wave_scaffold.dart';
import 'package:pluriwave/widgets/mini_reproductor.dart';
import 'servicios/navegacion_auto.dart';
import 'servicios/servicio_alarmas_android.dart';
import 'servicios/servicio_dispositivo_audio.dart';

class PluriWaveApp extends StatelessWidget {
  const PluriWaveApp({super.key, this.prefs, this.fuenteAuto});

  /// Single SharedPreferences instance resolved in main() (S3-R4) and
  /// injected into every state/service.
  final SharedPreferences? prefs;

  /// Android Auto browse source (Design "Data Flow" — cold-bind local read
  /// available before EstadoRadio builds). Optional: defaults to `null`,
  /// same as every other existing caller/test that constructs
  /// [PluriWaveApp] without it.
  final FuenteEmisorasAuto? fuenteAuto;

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(
          create:
              (_) => EstadoRadio(
                prefs: prefs,
                dispositivoAudio: ServicioDispositivoAudioReal(),
                fuenteAuto: fuenteAuto,
              ),
        ),
        // Domain notifiers (S4-R1/R2/R3). Created and disposed by EstadoRadio
        // (they need its services and callbacks at construction); these
        // providers only expose the instances, so they declare no dispose
        // callback.
        ListenableProvider<EstadoEcualizador>(
          create: (context) => context.read<EstadoRadio>().ecualizador,
        ),
        ListenableProvider<EstadoGrabacion>(
          create: (context) => context.read<EstadoRadio>().grabacion,
        ),
        ListenableProvider<EstadoBusqueda>(
          create: (context) => context.read<EstadoRadio>().busqueda,
        ),
        ChangeNotifierProvider(create: (_) => EstadoAlarmas(prefs: prefs)),
        ChangeNotifierProvider(
          create: (_) => EstadoIdioma(sharedPreferences: prefs),
        ),
        // Design ADR-8: root-to-root navigation state. `_PaginaPrincipal`
        // watches this instead of owning `_indice` locally.
        ChangeNotifierProvider(create: (_) => EstadoNavegacionRaiz()),
      ],
      child: Consumer<EstadoIdioma>(
        builder:
            (context, estadoIdioma, _) => MaterialApp(
              title: 'PluriWave',
              debugShowCheckedModeBanner: false,
              theme: PluriWaveTheme.dark(),
              darkTheme: PluriWaveTheme.dark(),
              themeMode: ThemeMode.dark,
              localizationsDelegates: AppLocalizations.localizationsDelegates,
              supportedLocales: AppLocalizations.supportedLocales,
              locale: estadoIdioma.localeSeleccionado,
              home: const _PaginaPrincipal(),
            ),
      ),
    );
  }
}

class _PaginaPrincipal extends StatefulWidget {
  const _PaginaPrincipal();

  @override
  State<_PaginaPrincipal> createState() => _PaginaPrincipalState();
}

class _PaginaPrincipalState extends State<_PaginaPrincipal>
    with WidgetsBindingObserver {
  StreamSubscription<String>? _errorSubscription;
  StreamSubscription<EventoAlarmaAndroid>? _alarmaSubscription;
  StreamSubscription<AlarmaMusical>? _alarmaVencidaSubscription;
  EstadoRadio? _estadoSuscrito;
  bool _alarmaInicialProcesada = false;
  bool _alarmaSonandoActiva = false;
  bool _onboardingInicialSolicitado = false;
  String? _alarmaSonandoId;
  Locale? _localeAlarmasConfigurado;

  static const _paginas = [
    PantallaInicio(),
    PantallaBuscar(),
    PantallaFavoritos(),
    PantallaAlarmas(),
    PantallaAjustes(),
  ];

  List<PluriNavItem> _navItems(AppLocalizations l10n) => [
    PluriNavItem(glyph: PluriIconGlyph.home, label: l10n.navHome),
    PluriNavItem(glyph: PluriIconGlyph.search, label: l10n.navSearch),
    PluriNavItem(glyph: PluriIconGlyph.favorites, label: l10n.navFavorites),
    PluriNavItem(glyph: PluriIconGlyph.alarm, label: l10n.navAlarms),
    PluriNavItem(glyph: PluriIconGlyph.settings, label: l10n.navSettings),
  ];

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state != AppLifecycleState.resumed) return;
    // Fix "stale green dot": on return to foreground the Activity may have
    // been recreated over the cached engine, leaving the device event channel
    // without a live native sink. Re-subscribe and re-seed the active device
    // (no-op when multi-device EQ is off).
    unawaited(context.read<EstadoEcualizador>().refrescarDispositivoActual());
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    // S3-R3 / Decision 3.2: keep the alarm bridge l10n in sync, once per
    // locale change (this hook re-runs when Localizations changes).
    final locale = Localizations.localeOf(context);
    if (_localeAlarmasConfigurado != locale) {
      _localeAlarmasConfigurado = locale;
      context.read<EstadoAlarmas>().configurarLocalizaciones(
        AppLocalizations.of(context),
      );
    }
    final estado = context.read<EstadoRadio>();
    if (identical(_estadoSuscrito, estado) && _errorSubscription != null) {
      return;
    }
    _errorSubscription?.cancel();
    _estadoSuscrito = estado;
    _errorSubscription = estado.errorStream.listen((msg) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(msg),
          duration: const Duration(seconds: 3),
          action: SnackBarAction(
            label: AppLocalizations.of(context).actionOk,
            onPressed: () {},
          ),
        ),
      );
    });

    final alarmas = context.read<EstadoAlarmas>();
    _alarmaSubscription ??= alarmas.android.eventosAlarma.listen((evento) {
      if (!mounted) return;
      _abrirAlarmaSonando(evento);
    });
    _alarmaVencidaSubscription ??= alarmas.alarmasVencidasStream.listen((
      alarma,
    ) {
      if (!mounted) return;
      _abrirAlarmaDirecta(alarma);
    });
    if (!_alarmaInicialProcesada) {
      _alarmaInicialProcesada = true;
      unawaited(_procesarAlarmaInicial(alarmas));
    }
    if (!_onboardingInicialSolicitado) {
      _onboardingInicialSolicitado = true;
      unawaited(_mostrarOnboardingInicial());
    }
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _errorSubscription?.cancel();
    _alarmaSubscription?.cancel();
    _alarmaVencidaSubscription?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context);
    final navegacion = context.watch<EstadoNavegacionRaiz>();
    final indice = navegacion.indice;

    return PluriWaveScaffold(
      appBar: AppBar(
        title: Text(l10n.appTitle),
        actions: [
          IconButton(
            icon: const Icon(Icons.bedtime_outlined),
            tooltip: l10n.sleepTimer,
            onPressed: () => _mostrarTimerDialog(context),
          ),
        ],
      ),
      body: SafeArea(
        top: false,
        child: AnimatedSwitcher(
          duration: context.pluriMotion.normal,
          switchInCurve: Curves.easeOutCubic,
          switchOutCurve: Curves.easeInCubic,
          transitionBuilder:
              (child, animation) => FadeTransition(
                opacity: animation,
                child: SlideTransition(
                  position: Tween<Offset>(
                    begin: const Offset(0.035, 0),
                    end: Offset.zero,
                  ).animate(animation),
                  child: child,
                ),
              ),
          child: KeyedSubtree(
            key: ValueKey<int>(indice),
            child: _paginas[indice],
          ),
        ),
      ),
      bottomNavigationBar: SafeArea(
        top: false,
        minimum: const EdgeInsets.only(bottom: PluriLayout.compactGap),
        child: Padding(
          padding: const EdgeInsets.fromLTRB(8, 0, 8, 0),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              // ADR-7(b): hidden on Escuchar (index 0) only — its embedded
              // hero already shows the same station. Stays mounted (visible:
              // false renders SizedBox.shrink(), not tree removal) so its
              // didChangeDependencies side effect (S3-R3) keeps running.
              MiniReproductor(visible: indice != RaizPluriWave.escuchar.index),
              PluriBottomNavigation(
                items: _navItems(l10n),
                selectedIndex: indice,
                onSelected: (i) => navegacion.irA(RaizPluriWave.values[i]),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _procesarAlarmaInicial(EstadoAlarmas alarmas) async {
    final evento = await alarmas.android.obtenerEventoInicial();
    if (evento != null && mounted) {
      await _abrirAlarmaSonando(evento);
    }
  }

  Future<void> _mostrarOnboardingInicial() async {
    await Future<void>.delayed(const Duration(milliseconds: 900));
    if (!mounted || _alarmaSonandoActiva) return;
    await PluriOnboardingDialog.mostrarSiProcede(context);
  }

  Future<void> _abrirAlarmaSonando(EventoAlarmaAndroid evento) async {
    if (evento.accion == EventoAlarmaAndroid.accionSnoozed) {
      // EstadoAlarmas records native snoozes itself (Decision 2.1); there is
      // nothing to open for this event.
      return;
    }
    if (evento.accion == EventoAlarmaAndroid.accionMissed) {
      // EstadoAlarmas' own native-event listener already recorded this
      // transition (RES-1); the ring already ended, so opening the ringing
      // screen here would only show a stale, already-silent alarm.
      return;
    }
    final estado = context.read<EstadoAlarmas>();
    if (estado.alarmas.isEmpty) {
      await estado.cargarPersistidasSinRecalcular();
    }
    AlarmaMusical? alarma;
    for (final item in estado.alarmas) {
      if (item.id == evento.alarmaId) {
        alarma = item;
        break;
      }
    }
    if (alarma == null || !mounted) {
      debugPrint(
        '[PluriWave][alarmas] evento sin alarma persistida id=${evento.alarmaId} accion=${evento.accion}',
      );
      return;
    }
    if (evento.accion.endsWith('.SKIP_NEXT')) {
      await estado.saltarProxima(alarma.id);
      if (!mounted) return;
      context.read<EstadoNavegacionRaiz>().irA(RaizPluriWave.alarmas);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(
            AppLocalizations.of(context).skipCurrentAlarmExecution(
              localizedAlarmName(AppLocalizations.of(context), alarma.nombre),
            ),
          ),
        ),
      );
      return;
    }
    if (evento.accion.endsWith('.POSTPONE_NEXT')) {
      final ejecucion =
          evento.occurrenceAtMillis > 0
              ? DateTime.fromMillisecondsSinceEpoch(evento.occurrenceAtMillis)
              : alarma.proximaEjecucion ?? DateTime.now();
      await estado.posponerProximaDesdePreaviso(
        alarma,
        evento.snoozeMinutes,
        ejecucion,
      );
      if (!mounted) return;
      context.read<EstadoNavegacionRaiz>().irA(RaizPluriWave.alarmas);
      // posponerProximaDesdePreaviso no longer throws on a native scheduling
      // failure — it records the failure into EstadoAlarmas.error instead.
      // Branch on it here so the user sees the real outcome instead of an
      // always-success message.
      final error = estado.error;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(
            error ??
                AppLocalizations.of(context).alarmPostponedCurrentExecution,
          ),
        ),
      );
      return;
    }
    if (evento.accion.endsWith('.PRE_NOTICE')) {
      context.read<EstadoNavegacionRaiz>().irA(RaizPluriWave.alarmas);
      return;
    }
    await _mostrarAlarmaSonando(alarma);
  }

  Future<void> _abrirAlarmaDirecta(AlarmaMusical alarma) async {
    await _mostrarAlarmaSonando(alarma);
  }

  Future<void> _mostrarAlarmaSonando(AlarmaMusical alarma) async {
    final alarmas = context.read<EstadoAlarmas>();
    alarmas.marcarEjecucionGestionada(alarma);

    if (_alarmaSonandoActiva) {
      debugPrint(
        '[PluriWave][alarmas] alarma ignorada porque ya hay una activa id=${alarma.id} activa=$_alarmaSonandoId',
      );
      // A duplicate delivery of the SAME ring's own fire event (the live
      // eventosAlarma stream and the one-shot obtenerEventoInicial() read
      // the same native event and can both reach here) must be a no-op.
      // When a genuinely DIFFERENT alarm fired while this one is active
      // (single-ring-at-a-time by design), hide ONLY its notification
      // (RES-1): ocultarNotificacionAlarma -> dismissAlarmNotification
      // unconditionally stops PluriWaveAlarmService, which would silently
      // kill the OTHER alarm's ring if it is the one genuinely sounding.
      if (alarma.id != _alarmaSonandoId) {
        await alarmas.android.ocultarSoloNotificacion(alarma.id);
      }
      return;
    }

    _alarmaSonandoActiva = true;
    _alarmaSonandoId = alarma.id;

    try {
      if (!mounted) return;
      await Navigator.of(context).push(
        MaterialPageRoute<void>(
          builder: (_) => PantallaAlarmaSonando(alarma: alarma),
          fullscreenDialog: true,
        ),
      );
    } finally {
      if (_alarmaSonandoId == alarma.id) {
        _alarmaSonandoActiva = false;
        _alarmaSonandoId = null;
      }
    }
  }

  void _mostrarTimerDialog(BuildContext context) {
    showModalBottomSheet(
      context: context,
      showDragHandle: true,
      builder:
          (ctx) => Consumer<EstadoRadio>(
            builder:
                (ctx, estado, _) => SafeArea(
                  child: Padding(
                    padding: PluriLayout.sheetPadding,
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          AppLocalizations.of(ctx).sleepTimer,
                          style: Theme.of(ctx).textTheme.titleLarge,
                        ),
                        const SizedBox(height: PluriLayout.sectionGap),
                        Text(
                          AppLocalizations.of(ctx).sleepTimerDescription,
                          style: Theme.of(ctx).textTheme.bodySmall,
                        ),
                        const SizedBox(height: PluriLayout.panelGap),
                        if (estado.timer.activo)
                          StreamBuilder<Duration>(
                            stream: estado.timer.tiempoRestanteStream,
                            builder: (ctx, snap) {
                              final restante =
                                  snap.data ?? estado.timer.tiempoRestante;
                              return Column(
                                crossAxisAlignment: CrossAxisAlignment.stretch,
                                children: [
                                  Text(
                                    _formatearDuracionTimer(
                                      AppLocalizations.of(ctx),
                                      restante,
                                    ),
                                    style:
                                        Theme.of(ctx).textTheme.headlineMedium,
                                  ),
                                  const SizedBox(
                                    height: PluriLayout.compactGap,
                                  ),
                                  FilledButton.tonal(
                                    onPressed: () {
                                      estado.cancelarTimer();
                                      Navigator.pop(ctx);
                                    },
                                    child: Text(
                                      AppLocalizations.of(ctx).cancelTimer,
                                    ),
                                  ),
                                ],
                              );
                            },
                          )
                        else
                          Wrap(
                            spacing: PluriLayout.compactGap,
                            runSpacing: PluriLayout.compactGap,
                            children: [
                              for (final segundos
                                  in estado.timerSuenoPresetsSegundos)
                                ActionChip(
                                  label: Text(
                                    _formatearDuracionTimer(
                                      AppLocalizations.of(ctx),
                                      Duration(seconds: segundos),
                                    ),
                                  ),
                                  onPressed: () {
                                    estado.iniciarTimerDuracion(
                                      Duration(seconds: segundos),
                                    );
                                    Navigator.pop(ctx);
                                  },
                                ),
                              ActionChip(
                                avatar: const Icon(
                                  Icons.tune_rounded,
                                  size: 18,
                                ),
                                label: Text(
                                  AppLocalizations.of(ctx).optionOther,
                                ),
                                onPressed: () async {
                                  final duracion =
                                      await _pedirDuracionPersonalizada(ctx);
                                  if (duracion == null || !ctx.mounted) return;
                                  estado.iniciarTimerDuracion(duracion);
                                  Navigator.pop(ctx);
                                },
                              ),
                            ],
                          ),
                      ],
                    ),
                  ),
                ),
          ),
    );
  }

  Future<Duration?> _pedirDuracionPersonalizada(BuildContext context) {
    return showModalBottomSheet<Duration>(
      context: context,
      isScrollControlled: true,
      showDragHandle: true,
      builder: (ctx) => const _TimerPersonalizadoSheet(),
    );
  }
}

String _formatearDuracionTimer(AppLocalizations l10n, Duration duracion) {
  final horas = duracion.inHours;
  final minutos = duracion.inMinutes.remainder(60);
  final segundos = duracion.inSeconds.remainder(60);
  if (horas > 0) {
    return l10n.durationHoursMinutesSeconds(
      horas,
      minutos.toString().padLeft(2, '0'),
      segundos.toString().padLeft(2, '0'),
    );
  }
  if (minutos > 0) {
    return segundos == 0
        ? l10n.durationMinutesOnly(minutos)
        : l10n.durationMinutesSeconds(
          minutos,
          segundos.toString().padLeft(2, '0'),
        );
  }
  return l10n.durationSecondsOnly(segundos);
}

class _TimerPersonalizadoSheet extends StatefulWidget {
  const _TimerPersonalizadoSheet();

  @override
  State<_TimerPersonalizadoSheet> createState() =>
      _TimerPersonalizadoSheetState();
}

class _TimerPersonalizadoSheetState extends State<_TimerPersonalizadoSheet> {
  final _horasCtrl = TextEditingController();
  final _minutosCtrl = TextEditingController(text: '15');
  final _segundosCtrl = TextEditingController();
  bool _guardarPreset = true;

  @override
  void dispose() {
    _horasCtrl.dispose();
    _minutosCtrl.dispose();
    _segundosCtrl.dispose();
    super.dispose();
  }

  int _leer(TextEditingController ctrl) => int.tryParse(ctrl.text.trim()) ?? 0;

  Future<void> _confirmar() async {
    final duracion = Duration(
      hours: _leer(_horasCtrl),
      minutes: _leer(_minutosCtrl),
      seconds: _leer(_segundosCtrl),
    );
    if (duracion <= Duration.zero) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(AppLocalizations.of(context).durationGreaterThanZero),
        ),
      );
      return;
    }
    if (_guardarPreset) {
      await context.read<EstadoRadio>().agregarTimerSuenoPreset(duracion);
    }
    if (mounted) Navigator.pop(context, duracion);
  }

  @override
  Widget build(BuildContext context) {
    final bottom = MediaQuery.viewInsetsOf(context).bottom;
    return SafeArea(
      child: Padding(
        padding: EdgeInsets.fromLTRB(18, 0, 18, 18 + bottom),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Text(
              AppLocalizations.of(context).customDurationTitle,
              style: Theme.of(context).textTheme.titleLarge,
            ),
            const SizedBox(height: PluriLayout.sectionGap),
            Row(
              children: [
                Expanded(
                  child: _campoTiempo(
                    _horasCtrl,
                    AppLocalizations.of(context).hoursLabel,
                  ),
                ),
                const SizedBox(width: PluriLayout.compactGap),
                Expanded(
                  child: _campoTiempo(
                    _minutosCtrl,
                    AppLocalizations.of(context).minutesLabel,
                  ),
                ),
                const SizedBox(width: PluriLayout.compactGap),
                Expanded(
                  child: _campoTiempo(
                    _segundosCtrl,
                    AppLocalizations.of(context).secondsLabel,
                  ),
                ),
              ],
            ),
            const SizedBox(height: PluriLayout.compactGap),
            SwitchListTile.adaptive(
              contentPadding: EdgeInsets.zero,
              title: Text(AppLocalizations.of(context).saveQuickAccess),
              value: _guardarPreset,
              onChanged: (value) => setState(() => _guardarPreset = value),
            ),
            const SizedBox(height: PluriLayout.sectionGap),
            FilledButton.icon(
              icon: const Icon(Icons.bedtime_rounded),
              label: Text(AppLocalizations.of(context).startTimer),
              onPressed: _confirmar,
            ),
          ],
        ),
      ),
    );
  }

  Widget _campoTiempo(TextEditingController controller, String label) {
    return TextField(
      controller: controller,
      keyboardType: TextInputType.number,
      decoration: InputDecoration(
        labelText: label,
        border: const OutlineInputBorder(),
      ),
    );
  }
}