import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pluriwave/estado/estado_entitlement.dart';
import 'package:pluriwave/servicios/servicio_anuncios.dart';
import 'package:pluriwave/widgets/banner_anuncio_superior.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

/// Ad-display spec "Persistent Top Banner, Never Overlapping Content": the
/// banner is entitlement-aware and reserves layout via a `Column`
/// (`SizedBox.shrink()` collapses it to zero footprint) — never a `Stack`
/// overlay. AdMob's own `BannerAd.load()` cannot reach a real ad server in
/// `flutter test` (no plugin channel registered), so it always resolves to
/// "unloaded" here — exactly the same degrade-to-shrink path a genuine
/// failed load takes in production (never a crash, never a placeholder).
void main() {
  setUp(() {
    SharedPreferences.setMockInitialValues({});
  });

  Widget construir({required bool premium}) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider<EstadoEntitlement>(
          create: (_) {
            final estado = EstadoEntitlement(prefs: null);
            return estado;
          },
        ),
        Provider<ServicioAnuncios>(
          create: (_) => ServicioAnuncios(esPremium: () => premium),
        ),
      ],
      child: MaterialApp(
        home: Scaffold(
          body: Column(
            children: [
              const BannerAnuncioSuperior(),
              const Expanded(child: Center(child: Text('contenido'))),
            ],
          ),
        ),
      ),
    );
  }

  testWidgets(
    'usuario free sin anuncio cargado: colapsa a SizedBox.shrink (nunca overlay)',
    (tester) async {
      await tester.pumpWidget(construir(premium: false));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 50));

      final banner = find.byType(BannerAnuncioSuperior);
      expect(banner, findsOneWidget);
      // Collapsed to zero footprint (no ad ever loads in a widget test — no
      // AdMob plugin channel registered) — a `SizedBox.shrink()`, not an
      // overlay: the Column layout below it stays fully visible.
      expect(tester.getSize(banner).height, 0);
      expect(find.text('contenido'), findsOneWidget);
    },
  );

  testWidgets('usuario premium: nunca intenta mostrar el banner', (
    tester,
  ) async {
    await tester.pumpWidget(construir(premium: true));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 50));

    final banner = find.byType(BannerAnuncioSuperior);
    expect(tester.getSize(banner).height, 0);
    expect(find.text('contenido'), findsOneWidget);
  });
}