import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:http/http.dart' as http;
import 'package:mocktail/mocktail.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:mabea_app/api/api_client.dart';
import 'package:mabea_app/screens/login_screen.dart';

class _MockClient extends Mock implements http.Client {}

void main() {
  setUpAll(() {
    registerFallbackValue(Uri.parse('http://test.local'));
  });

  late _MockClient httpClient;
  late ApiClient apiClient;

  setUp(() {
    SharedPreferences.setMockInitialValues({});
    httpClient = _MockClient();
    apiClient = ApiClient(baseUrl: 'http://test.local/api/v1', httpClient: httpClient);
  });

  testWidgets('erfolgreicher Login navigiert zur Objektliste', (tester) async {
    when(() => httpClient.post(any(), headers: any(named: 'headers'), body: any(named: 'body')))
        .thenAnswer((_) async => http.Response(jsonEncode({'access_token': 'abc-token'}), 200));
    when(() => httpClient.get(any(), headers: any(named: 'headers')))
        .thenAnswer((_) async => http.Response(jsonEncode([]), 200));

    await tester.pumpWidget(MaterialApp(home: LoginScreen(apiClient: apiClient)));

    await tester.enterText(find.widgetWithText(TextField, 'Login'), 'mitarbeiter1');
    await tester.enterText(find.widgetWithText(TextField, 'Passwort'), 'test-passwort-123');
    await tester.tap(find.widgetWithText(FilledButton, 'Anmelden'));
    await tester.pumpAndSettle();

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

  testWidgets('falsches Passwort zeigt Fehlermeldung, bleibt auf Login', (tester) async {
    when(() => httpClient.post(any(), headers: any(named: 'headers'), body: any(named: 'body')))
        .thenAnswer((_) async => http.Response(jsonEncode({'detail': 'falsch'}), 401));

    await tester.pumpWidget(MaterialApp(home: LoginScreen(apiClient: apiClient)));

    await tester.enterText(find.widgetWithText(TextField, 'Login'), 'mitarbeiter1');
    await tester.enterText(find.widgetWithText(TextField, 'Passwort'), 'falsch');
    await tester.tap(find.widgetWithText(FilledButton, 'Anmelden'));
    await tester.pumpAndSettle();

    expect(find.text('Login oder Passwort falsch'), findsOneWidget);
  });
}