import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:todo_app/features/todo/domain/entities/todo.dart';
import 'package:todo_app/features/todo/domain/repositories/todo_repository.dart';
import 'package:todo_app/features/todo/presentation/providers/todo_providers.dart';
import 'package:todo_app/features/todo/presentation/screens/todo_detail_screen.dart';

class MockTodoRepository extends Mock implements TodoRepository {}

void main() {
  late MockTodoRepository repository;

  final testTodo = Todo(
    id: '1',
    title: 'Existing Todo',
    description: 'A description',
    priority: 'high',
    sortOrder: 0,
    createdAt: DateTime(2026, 1, 1),
    updatedAt: DateTime(2026, 1, 1),
  );

  Widget createCreateWidget() {
    return ProviderScope(
      overrides: [
        todoRepositoryProvider.overrideWithValue(repository),
      ],
      child: const MaterialApp(
        home: TodoDetailScreen(),
      ),
    );
  }

  Widget createEditWidget() {
    return ProviderScope(
      overrides: [
        todoRepositoryProvider.overrideWithValue(repository),
      ],
      child: const MaterialApp(
        home: TodoDetailScreen(todoId: '1'),
      ),
    );
  }

  setUp(() {
    repository = MockTodoRepository();
  });

  group('Create mode', () {
    testWidgets('shows create form', (tester) async {
      await tester.pumpWidget(createCreateWidget());
      await tester.pumpAndSettle();

      expect(find.text('New Todo'), findsOneWidget);
      expect(find.text('Create Todo'), findsOneWidget);
    });

    testWidgets('validates title is required', (tester) async {
      await tester.pumpWidget(createCreateWidget());
      await tester.pumpAndSettle();

      await tester.tap(find.text('Create Todo'));
      await tester.pumpAndSettle();

      expect(find.text('Title is required'), findsOneWidget);
    });
  });

  group('Edit mode', () {
    testWidgets('loads existing todo data', (tester) async {
      when(() => repository.getTodo('1')).thenAnswer((_) async => testTodo);

      await tester.pumpWidget(createEditWidget());
      await tester.pump();
      await tester.pump();

      expect(find.text('Edit Todo'), findsOneWidget);
    });
  });
}