import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:http/http.dart' as http;
import 'package:http/testing.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences_platform_interface/in_memory_shared_preferences_async.dart';
import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';

import 'package:nontonki/core/data/remote/auth_api.dart';
import 'package:nontonki/core/data/remote/api_client.dart';
import 'package:nontonki/core/data/services/auth_controller.dart';
import 'package:nontonki/core/data/services/auth_session_store.dart';
import 'package:nontonki/l10n/app_localizations.dart';
import 'package:nontonki/pages/auth/auth_view.dart';

/// 登录/注册页的可读证据：校验提示 + 登录/注册切换 + 未登录时不会去发请求。
void main() {
  setUp(() {
    SharedPreferencesAsyncPlatform.instance =
        InMemorySharedPreferencesAsync.empty();
  });

  Future<void> pumpAuthPage(WidgetTester tester, {bool signUp = false}) async {
    final auth = AuthController(
      AuthApi(
        // 这个测试不联网：请求一律 500，正好用于验证"本地校验没过就不发请求"
        ApiClient(
          baseUrl: 'http://127.0.0.1:1',
          client: MockClient((_) async => http.Response('{}', 500)),
        ),
      ),
      AuthSessionStore(),
    );
    await tester.pumpWidget(
      ChangeNotifierProvider<AuthController>.value(
        value: auth,
        child: MaterialApp(
          locale: const Locale('en'),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: AuthPage(signUpMode: signUp),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  testWidgets('empty form shows the email error and stays on the page', (tester) async {
    await pumpAuthPage(tester);

    expect(find.text('Welcome back'), findsOneWidget);

    await tester.tap(find.byType(FilledButton));
    await tester.pumpAndSettle();

    expect(find.text('Enter your email'), findsOneWidget);
    expect(find.text('Welcome back'), findsOneWidget);
  });

  testWidgets('weak password is rejected locally', (tester) async {
    await pumpAuthPage(tester);

    await tester.enterText(find.byType(TextField).first, 'a@b.com');
    await tester.enterText(find.byType(TextField).last, 'abcdefgh');
    await tester.tap(find.byType(FilledButton));
    await tester.pumpAndSettle();

    expect(find.text('Password needs both letters and numbers'), findsOneWidget);
  });

  testWidgets('switch link flips between sign in and sign up', (tester) async {
    await pumpAuthPage(tester);
    expect(find.text('Welcome back'), findsOneWidget);

    await tester.tap(find.text('New here? Create an account'));
    await tester.pumpAndSettle();

    expect(find.text('Create your account'), findsOneWidget);
    expect(find.text('Already have an account? Sign in'), findsOneWidget);
  });
}