import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:go_router/go_router.dart';

import 'package:food_ai/core/auth/auth_provider.dart';
import 'package:food_ai/features/auth/login_screen.dart';

class _TestAuthNotifier extends AuthNotifier {
  _TestAuthNotifier(super.initialState) : super.test();

  @override
  Future<void> signInWithEmail(String email, String password) async {}

  @override
  Future<void> signInWithGoogle() async {}

  @override
  Future<void> register(String email, String password, String name) async {}

  @override
  Future<void> signOut() async {}
}

Widget _buildTestWidget({AuthState? initialState}) {
  final authState = initialState ??
      const AuthState(status: AuthStatus.unauthenticated);

  final router = GoRouter(
    initialLocation: '/auth/login',
    routes: [
      GoRoute(
        path: '/auth/login',
        builder: (_, __) => const LoginScreen(),
      ),
      GoRoute(
        path: '/auth/register',
        builder: (_, __) =>
            const Scaffold(body: Text('Register Screen')),
      ),
      GoRoute(
        path: '/home',
        builder: (_, __) =>
            const Scaffold(body: Text('Home Screen')),
      ),
    ],
  );

  return ProviderScope(
    overrides: [
      authProvider.overrideWith(
        (ref) => _TestAuthNotifier(authState),
      ),
    ],
    child: MaterialApp.router(routerConfig: router),
  );
}

void main() {
  testWidgets('renders email and password fields and buttons',
      (tester) async {
    await tester.pumpWidget(_buildTestWidget());
    await tester.pumpAndSettle();

    expect(find.text('Email'), findsOneWidget);
    expect(find.text('Пароль'), findsOneWidget);
    expect(find.text('Войти'), findsOneWidget);
    expect(find.text('Войти через Google'), findsOneWidget);
    expect(find.text('Нет аккаунта? Регистрация'), findsOneWidget);
  });

  testWidgets('validates empty email', (tester) async {
    await tester.pumpWidget(_buildTestWidget());
    await tester.pumpAndSettle();

    await tester.tap(find.text('Войти'));
    await tester.pumpAndSettle();

    expect(find.text('Введите email'), findsOneWidget);
  });

  testWidgets('validates invalid email format', (tester) async {
    await tester.pumpWidget(_buildTestWidget());
    await tester.pumpAndSettle();

    await tester.enterText(
        find.widgetWithText(TextFormField, 'Email'), 'abc');
    await tester.tap(find.text('Войти'));
    await tester.pumpAndSettle();

    expect(find.text('Некорректный email'), findsOneWidget);
  });

  testWidgets('validates short password', (tester) async {
    await tester.pumpWidget(_buildTestWidget());
    await tester.pumpAndSettle();

    await tester.enterText(
        find.widgetWithText(TextFormField, 'Email'), 'test@test.com');
    await tester.enterText(
        find.widgetWithText(TextFormField, 'Пароль'), '123');
    await tester.tap(find.text('Войти'));
    await tester.pumpAndSettle();

    expect(find.text('Минимум 6 символов'), findsOneWidget);
  });

  testWidgets('shows FoodAI branding', (tester) async {
    await tester.pumpWidget(_buildTestWidget());
    await tester.pumpAndSettle();

    expect(find.text('FoodAI'), findsOneWidget);
    expect(find.text('Управляйте питанием\nс помощью AI'), findsOneWidget);
  });
}