import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pluriwave/estado/estado_alarmas.dart';
import 'package:pluriwave/estado/estado_busqueda.dart';
import 'package:pluriwave/estado/estado_ecualizador.dart';
import 'package:pluriwave/estado/estado_entitlement.dart';
import 'package:pluriwave/estado/estado_grabacion.dart';
import 'package:pluriwave/estado/estado_idioma.dart';
import 'package:pluriwave/estado/estado_radio.dart';
import 'package:pluriwave/l10n/gen/app_localizations.dart';
import 'package:pluriwave/pantallas/pantalla_ajustes.dart';
import 'package:pluriwave/pantallas/pantalla_alarmas.dart';
import 'package:pluriwave/pantallas/pantalla_buscar.dart';
import 'package:pluriwave/pantallas/pantalla_favoritos.dart';
import 'package:pluriwave/pantallas/pantalla_inicio.dart';
import 'package:pluriwave/servicios/servicio_alarmas.dart';
import 'package:pluriwave/widgets/pluri_push_scaffold.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

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

/// Design ADR-2 enforcement test: chrome is decided by route topology, not a
/// parameter. Mounting each of the 5 root screens bare (no ancestor
/// PluriWaveScaffold/Scaffold) must render zero Scaffolds — "no tab bar on
/// second-level screens" becomes a structural fact, not a convention. A
/// PluriPushScaffold, by contrast, is the ONE place a second-level screen
/// gets a Scaffold, and it must render exactly one 56px AppBar with a back
/// affordance.
void main() {
  setUp(() {
    SharedPreferences.setMockInitialValues({});
  });

  Widget testApp(Widget home) {
    return MaterialApp(
      locale: const Locale('es'),
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
      // No Scaffold ancestor here on purpose — a bare Material is enough
      // for InkWell/Card without secretly providing the very Scaffold this
      // test asserts is absent.
      home: Material(child: home),
    );
  }

  Future<File> archivoCustomVacio() async => File(
    '${Directory.current.path}/test/fixtures/emisoras_custom_vacio.json',
  );

  // Existing project convention (see pantalla_inicio_test.dart et al.): the
  // default 800x600 test surface clips these content-heavy root screens.
  void setLargeSurface(WidgetTester tester) {
    tester.view.physicalSize = const Size(1440, 3200);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);
    addTearDown(tester.view.resetDevicePixelRatio);
  }

  // Pre-existing project constraint (see pantalla_ajustes_test.dart):
  // PluriGlassSurface paints a background over ListTile's ink layer, which
  // Flutter flags as a warning-level assertion, not a correctness bug.
  void suppressListTileInkAssertion() {
    final original = FlutterError.onError;
    FlutterError.onError = (details) {
      if (details.exceptionAsString().contains(
        'ListTile background color or ink splashes may be invisible',
      )) {
        return;
      }
      original?.call(details);
    };
    addTearDown(() => FlutterError.onError = original);
  }

  group('The 5 root screens build zero Scaffold when mounted bare', () {
    testWidgets('PantallaInicio', (tester) async {
      setLargeSurface(tester);
      final estado = EstadoRadio(
        audio: FakeServicioAudio(),
        favoritos: FakeServicioFavoritos(),
        radio: FakeServicioRadio(),
        servicioEcualizador: FakeServicioEcualizador(),
        servicioGrabacion: FakeServicioGrabacionRadioInactiva(),
        resolverArchivoCustom: archivoCustomVacio,
        iniciarAutomaticamente: false,
      );
      addTearDown(estado.dispose);

      await tester.pumpWidget(
        MultiProvider(
          providers: [
            ChangeNotifierProvider<EstadoRadio>.value(value: estado),
            ListenableProvider<EstadoEcualizador>.value(
              value: estado.ecualizador,
            ),
            ListenableProvider<EstadoGrabacion>.value(value: estado.grabacion),
            ListenableProvider<EstadoBusqueda>.value(value: estado.busqueda),
          ],
          child: testApp(const PantallaInicio()),
        ),
      );
      await tester.pump();

      expect(find.byType(Scaffold), findsNothing);
    });

    testWidgets('PantallaBuscar', (tester) async {
      setLargeSurface(tester);
      // WU6 correction: PantallaBuscar now also owns the discovery landing
      // state relocated from PantallaInicio (task 6.5), which reads
      // EstadoRadio directly (near-you/trending/browse-grid selectors) —
      // a bare EstadoBusqueda provider is no longer sufficient.
      final estado = EstadoRadio(
        audio: FakeServicioAudio(),
        favoritos: FakeServicioFavoritos(),
        radio: FakeServicioRadio(),
        servicioEcualizador: FakeServicioEcualizador(),
        servicioGrabacion: FakeServicioGrabacionRadioInactiva(),
        resolverArchivoCustom: archivoCustomVacio,
        iniciarAutomaticamente: false,
      );
      addTearDown(estado.dispose);

      await tester.pumpWidget(
        MultiProvider(
          providers: [
            ChangeNotifierProvider<EstadoRadio>.value(value: estado),
            ListenableProvider<EstadoEcualizador>.value(
              value: estado.ecualizador,
            ),
            ListenableProvider<EstadoGrabacion>.value(value: estado.grabacion),
            ListenableProvider<EstadoBusqueda>.value(value: estado.busqueda),
          ],
          child: testApp(const PantallaBuscar()),
        ),
      );
      await tester.pump();

      expect(find.byType(Scaffold), findsNothing);
    });

    testWidgets('PantallaFavoritos', (tester) async {
      setLargeSurface(tester);
      final estado = EstadoRadio(
        audio: FakeServicioAudio(),
        favoritos: FakeServicioFavoritos(),
        radio: FakeServicioRadio(),
        servicioEcualizador: FakeServicioEcualizador(),
        servicioGrabacion: FakeServicioGrabacionRadioInactiva(),
        resolverArchivoCustom: archivoCustomVacio,
        iniciarAutomaticamente: false,
      );
      addTearDown(estado.dispose);

      await tester.pumpWidget(
        ChangeNotifierProvider<EstadoRadio>.value(
          value: estado,
          child: testApp(const PantallaFavoritos()),
        ),
      );
      await tester.pump();

      expect(find.byType(Scaffold), findsNothing);
    });

    testWidgets('PantallaAlarmas', (tester) async {
      setLargeSurface(tester);
      final android = FakePuertoAlarmasAndroid();
      final estadoAlarmas = EstadoAlarmas(
        servicio: ServicioAlarmas(reloj: DateTime.now),
        android: android,
        iniciarAutomaticamente: false,
      );
      addTearDown(estadoAlarmas.dispose);
      addTearDown(android.dispose);

      await tester.pumpWidget(
        ChangeNotifierProvider<EstadoAlarmas>.value(
          value: estadoAlarmas,
          child: testApp(const PantallaAlarmas()),
        ),
      );
      await tester.pump();

      expect(find.byType(Scaffold), findsNothing);
    });

    testWidgets('PantallaAjustes', (tester) async {
      setLargeSurface(tester);
      suppressListTileInkAssertion();
      final estado = EstadoRadio(
        audio: FakeServicioAudio(),
        favoritos: FakeServicioFavoritos(),
        radio: FakeServicioRadio(),
        servicioEcualizador: FakeServicioEcualizador(),
        servicioGrabacion: FakeServicioGrabacionRadioInactiva(),
        resolverArchivoCustom: archivoCustomVacio,
        iniciarAutomaticamente: false,
      );
      addTearDown(estado.dispose);
      final estadoIdioma = EstadoIdioma();
      addTearDown(estadoIdioma.dispose);

      await tester.pumpWidget(
        MultiProvider(
          providers: [
            ChangeNotifierProvider<EstadoRadio>.value(value: estado),
            ListenableProvider<EstadoEcualizador>.value(
              value: estado.ecualizador,
            ),
            ListenableProvider<EstadoGrabacion>.value(value: estado.grabacion),
            ChangeNotifierProvider<EstadoIdioma>.value(value: estadoIdioma),
            ChangeNotifierProvider<EstadoEntitlement>(
              create: (_) => EstadoEntitlement(prefs: null),
            ),
          ],
          child: testApp(const PantallaAjustes()),
        ),
      );
      await tester.pump();

      expect(find.byType(Scaffold), findsNothing);
    });
  });

  group('PluriPushScaffold', () {
    testWidgets('renders exactly one 56px AppBar with a back affordance', (
      tester,
    ) async {
      await tester.pumpWidget(
        MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: Navigator(
            onGenerateRoute:
                (settings) => MaterialPageRoute<void>(
                  builder:
                      (_) => const PluriPushScaffold(
                        title: 'Detalle',
                        body: SizedBox.shrink(),
                      ),
                ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      expect(find.byType(Scaffold), findsOneWidget);
      expect(find.byType(AppBar), findsOneWidget);
      final appBar = tester.widget<AppBar>(find.byType(AppBar));
      expect(appBar.toolbarHeight, PluriPushScaffold.headerHeight);
      expect(PluriPushScaffold.headerHeight, 56);
      expect(find.byIcon(Icons.arrow_back_rounded), findsOneWidget);
      expect(find.text('Detalle'), findsOneWidget);
    });

    // Design ADR-2's load-bearing contract: PluriPushScaffold has NO
    // bottomNavigationBar parameter. This is a type-system guarantee, not a
    // runtime one — passing `bottomNavigationBar: ...` below would simply
    // fail to compile. There is nothing to assert dynamically; the absence
    // of that parameter IS the enforcement.

    testWidgets('push navigates via Navigator.push (route depth increases)', (
      tester,
    ) async {
      await tester.pumpWidget(
        MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: Builder(
            builder:
                (context) => Material(
                  child: Center(
                    child: ElevatedButton(
                      onPressed:
                          () => PluriPushScaffold.push(
                            context,
                            (_) => const PluriPushScaffold(
                              title: 'Empujada',
                              body: SizedBox.shrink(),
                            ),
                          ),
                      child: const Text('abrir'),
                    ),
                  ),
                ),
          ),
        ),
      );

      expect(find.byType(PluriPushScaffold), findsNothing);
      await tester.tap(find.text('abrir'));
      await tester.pumpAndSettle();

      expect(find.byType(PluriPushScaffold), findsOneWidget);
      expect(find.text('Empujada'), findsOneWidget);
    });
  });
}