import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:hidalyx_drluiscastro/features/patient/data/models/patient_model.dart';
import 'package:hidalyx_drluiscastro/features/patient/data/services/patient_service.dart';
import 'package:hidalyx_drluiscastro/features/patient/presentation/store/patient_store.dart';
import 'package:hidalyx_drluiscastro/features/patient/presentation/views/patient_modal_view.dart';

class MockPatientServiceForDelete extends PatientService {
  int? deletedPatientId;
  bool shouldFail = false;

  @override
  Future<void> deletePatient(int id) async {
    if (shouldFail) {
      throw Exception('Error simulado al eliminar paciente');
    }
    deletedPatientId = id;
  }
}

void main() {
  group('Patient Deletion Unit & Store Tests', () {
    test('PatientStore.deletePatient deletes patient and updates state', () async {
      final mockService = MockPatientServiceForDelete();
      final store = PatientStore(patientService: mockService);

      // Attempt to delete with null id
      final nullResult = await store.deletePatient();
      expect(nullResult, isFalse);
      expect(store.errorMessage, contains('No se puede eliminar un paciente que no ha sido guardado'));

      // Populate patient
      store.populateFromModel(const PatientModel(
        id: 777,
        nombre: 'CARLOS',
        apellido: 'MARTINEZ',
      ));
      expect(store.id, 777);

      // Execute deletion
      final success = await store.deletePatient();
      expect(success, isTrue);
      expect(mockService.deletedPatientId, 777);
      expect(store.isDeleting, isFalse);
      expect(store.successMessage, 'Paciente eliminado exitosamente');
      expect(store.errorMessage, isNull);
    });

    test('PatientStore.deletePatient handles service errors gracefully', () async {
      final mockService = MockPatientServiceForDelete()..shouldFail = true;
      final store = PatientStore(patientService: mockService);

      store.populateFromModel(const PatientModel(
        id: 888,
        nombre: 'LUCIA',
        apellido: 'MENDEZ',
      ));

      final success = await store.deletePatient();
      expect(success, isFalse);
      expect(store.isDeleting, isFalse);
      expect(store.errorMessage, contains('Error simulado al eliminar paciente'));
    });
  });

  group('Patient Deletion UI & Role Tests', () {
    testWidgets('Doctor sees "Eliminar" button when editing an existing patient', (tester) async {
      tester.view.physicalSize = const Size(1400, 1000);
      tester.view.devicePixelRatio = 1.0;
      addTearDown(() => tester.view.resetPhysicalSize());

      const patient = PatientModel(
        id: 555,
        nombre: 'JUAN',
        apellido: 'PEREZ',
        cedula: '001-9999999-1',
      );

      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: PatientModalView(
              initialPatient: patient,
              isSecretary: false,
            ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      expect(find.text('Eliminar'), findsOneWidget);
    });

    testWidgets('Doctor does NOT see "Eliminar" button when creating a new patient', (tester) async {
      tester.view.physicalSize = const Size(1400, 1000);
      tester.view.devicePixelRatio = 1.0;
      addTearDown(() => tester.view.resetPhysicalSize());

      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: PatientModalView(
              isSecretary: false,
            ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      expect(find.text('Eliminar'), findsNothing);
    });

    testWidgets('Secretary NEVER sees "Eliminar" button even when editing an existing patient', (tester) async {
      tester.view.physicalSize = const Size(1400, 1000);
      tester.view.devicePixelRatio = 1.0;
      addTearDown(() => tester.view.resetPhysicalSize());

      const patient = PatientModel(
        id: 555,
        nombre: 'JUAN',
        apellido: 'PEREZ',
      );

      await tester.pumpWidget(
        const MaterialApp(
          home: Scaffold(
            body: PatientModalView(
              initialPatient: patient,
              isSecretary: true,
            ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      expect(find.text('Eliminar'), findsNothing);
    });

    testWidgets('Clicking "Eliminar" opens confirmation dialog, Cancel does not delete', (tester) async {
      tester.view.physicalSize = const Size(1400, 1000);
      tester.view.devicePixelRatio = 1.0;
      addTearDown(() => tester.view.resetPhysicalSize());

      final mockService = MockPatientServiceForDelete();
      final store = PatientStore(patientService: mockService);
      store.populateFromModel(const PatientModel(
        id: 123,
        nombre: 'ROBERTO',
        apellido: 'GARCIA',
        cedula: '402-1234567-8',
      ));

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: PatientModalView(
              store: store,
              isSecretary: false,
            ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      // Click Eliminar button
      await tester.tap(find.text('Eliminar'));
      await tester.pumpAndSettle();

      // Verify confirmation dialog
      expect(find.text('¿Eliminar Ficha del Paciente?'), findsOneWidget);
      expect(find.text('ROBERTO GARCIA'), findsOneWidget);
      expect(find.textContaining('#123'), findsOneWidget);
      expect(find.textContaining('Esta acción es permanente e irreversible'), findsOneWidget);

      // Click Cancelar
      await tester.tap(find.text('Cancelar'));
      await tester.pumpAndSettle();

      // Dialog dismissed, patient NOT deleted
      expect(find.text('¿Eliminar Ficha del Paciente?'), findsNothing);
      expect(mockService.deletedPatientId, isNull);
    });

    testWidgets('Confirming deletion invokes service, calls onDeleted, and closes modal', (tester) async {
      tester.view.physicalSize = const Size(1400, 1000);
      tester.view.devicePixelRatio = 1.0;
      addTearDown(() => tester.view.resetPhysicalSize());

      final mockService = MockPatientServiceForDelete();
      final store = PatientStore(patientService: mockService);
      store.populateFromModel(const PatientModel(
        id: 999,
        nombre: 'ALBERTO',
        apellido: 'MOREL',
      ));

      int? deletedIdReceived;

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: Builder(
              builder: (ctx) => ElevatedButton(
                onPressed: () => showDialog(
                  context: ctx,
                  builder: (_) => PatientModalView(
                    store: store,
                    isSecretary: false,
                    onDeleted: (id) => deletedIdReceived = id,
                  ),
                ),
                child: const Text('Open Modal'),
              ),
            ),
          ),
        ),
      );
      await tester.pumpAndSettle();

      // Open modal
      await tester.tap(find.text('Open Modal'));
      await tester.pumpAndSettle();

      // Click Eliminar
      await tester.tap(find.text('Eliminar'));
      await tester.pumpAndSettle();

      // Click Eliminar Paciente inside confirmation dialog
      await tester.tap(find.text('Eliminar Paciente'));
      await tester.pumpAndSettle();

      expect(mockService.deletedPatientId, 999);
      expect(deletedIdReceived, 999);
      expect(find.textContaining('eliminada exitosamente'), findsOneWidget);
    });
  });
}