import 'dart:convert';

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';

class _MockClient extends Mock implements http.Client {}

void main() {
  late _MockClient httpClient;
  late ApiClient apiClient;

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

  group('login', () {
    test('speichert Token bei Erfolg', () async {
      when(() => httpClient.post(
            Uri.parse('http://test.local/api/v1/auth/login'),
            headers: any(named: 'headers'),
            body: any(named: 'body'),
          )).thenAnswer(
        (_) async => http.Response(jsonEncode({'access_token': 'abc-token'}), 200),
      );

      final token = await apiClient.login('mitarbeiter1', 'test-passwort-123');

      expect(token, 'abc-token');
      expect(apiClient.istEingeloggt, isTrue);
    });

    test('wirft ApiException bei falschem Passwort', () async {
      when(() => httpClient.post(
            Uri.parse('http://test.local/api/v1/auth/login'),
            headers: any(named: 'headers'),
            body: any(named: 'body'),
          )).thenAnswer(
        (_) async => http.Response(jsonEncode({'detail': 'falsch'}), 401),
      );

      expect(
        () => apiClient.login('mitarbeiter1', 'falsch'),
        throwsA(isA<ApiException>().having((e) => e.status, 'status', 401)),
      );
    });
  });

  group('request', () {
    test('sendet Bearer-Token, sobald eingeloggt', () async {
      when(() => httpClient.post(
            Uri.parse('http://test.local/api/v1/auth/login'),
            headers: any(named: 'headers'),
            body: any(named: 'body'),
          )).thenAnswer((_) async => http.Response(jsonEncode({'access_token': 'abc-token'}), 200));
      await apiClient.login('mitarbeiter1', 'test-passwort-123');

      when(() => httpClient.get(
            Uri.parse('http://test.local/api/v1/objekte'),
            headers: any(named: 'headers'),
          )).thenAnswer((_) async => http.Response(jsonEncode([]), 200));

      await apiClient.request('/objekte');

      final captured = verify(() => httpClient.get(
            Uri.parse('http://test.local/api/v1/objekte'),
            headers: captureAny(named: 'headers'),
          )).captured;
      final headers = captured.single as Map<String, String>;
      expect(headers['Authorization'], 'Bearer abc-token');
    });

    test('wirft ApiException bei 4xx-Antwort', () async {
      when(() => httpClient.get(
            Uri.parse('http://test.local/api/v1/objekte/1'),
            headers: any(named: 'headers'),
          )).thenAnswer((_) async => http.Response(jsonEncode({'detail': 'nicht gefunden'}), 404));

      expect(
        () => apiClient.request('/objekte/1'),
        throwsA(isA<ApiException>().having((e) => e.status, 'status', 404)),
      );
    });
  });
}