import 'package:cardash_launcher/data/models/jellyfin_models.dart';
import 'package:cardash_launcher/data/repositories/settings_repository.dart';
import 'package:cardash_launcher/data/services/jellyfin_service.dart';
import 'package:cardash_launcher/data/services/secure_store.dart';
import 'package:cardash_launcher/features/settings/jellyfin_controller.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

class _MemoryStore implements SecureStore {
  final values = <String, String>{};

  @override
  Future<String?> read(String key) async => values[key];

  @override
  Future<void> write(String key, String value) async {
    values[key] = value;
  }

  @override
  Future<void> delete(String key) async {
    values.remove(key);
  }
}

class _FakeGateway implements JellyfinGateway {
  bool unreachable = false;
  bool approved = false;
  bool rejectToken = false;
  int initiateCalls = 0;
  int userCalls = 0;
  String? lastDeviceId;

  @override
  Future<JellyfinServerInfo> serverInfo(Uri baseUrl) async {
    if (unreachable) {
      throw JellyfinUnreachable('Could not reach the server.');
    }
    return const JellyfinServerInfo(name: 'DarkTower', version: '12.2.0');
  }

  @override
  Future<JellyfinQuickConnect> startQuickConnect(
    Uri baseUrl, {
    required String deviceId,
  }) async {
    if (unreachable) {
      throw JellyfinUnreachable('Could not reach the server.');
    }
    initiateCalls++;
    lastDeviceId = deviceId;
    return const JellyfinQuickConnect(code: '491006', secret: 'secret');
  }

  @override
  Future<bool> isQuickConnectApproved(Uri baseUrl, String secret) async {
    if (unreachable) {
      throw JellyfinUnreachable('Could not reach the server.');
    }
    return approved;
  }

  @override
  Future<JellyfinSession> authenticateQuickConnect(
    Uri baseUrl,
    String secret, {
    required String deviceId,
  }) async {
    return const JellyfinSession(
      accessToken: 'token-1',
      userId: 'user-1',
      userName: 'wasp',
    );
  }

  @override
  Future<JellyfinUser> currentUser(Uri baseUrl, String token) async {
    userCalls++;
    if (unreachable) {
      throw JellyfinUnreachable('Could not reach the server.');
    }
    if (rejectToken) {
      throw JellyfinAuthException('The saved Jellyfin pairing is not valid.');
    }
    return const JellyfinUser(id: 'user-1', name: 'wasp');
  }

  @override
  void close() {}
}

Future<SettingsRepository> _settings([
  Map<String, Object> values = const {},
]) async {
  SharedPreferences.setMockInitialValues(values);
  final prefs = await SharedPreferences.getInstance();
  return SettingsRepository(prefs);
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test('enabling without a URL waits for setup', () async {
    final settings = await _settings();
    final gateway = _FakeGateway();
    final controller = JellyfinController(
      settings,
      gateway,
      _MemoryStore(),
      pollInterval: const Duration(milliseconds: 10),
      retryDelays: const [Duration(milliseconds: 10)],
    );
    addTearDown(controller.dispose);

    await controller.initialize();
    expect(controller.status, JellyfinStatus.disabled);

    await controller.setEnabled(true);
    expect(controller.status, JellyfinStatus.needsSetup);
    expect(controller.enabled, isTrue);
    expect(settings.jellyfinEnabled, isTrue);
  });

  test(
    'Quick Connect code is shown and the approved token is stored',
    () async {
      final settings = await _settings();
      final gateway = _FakeGateway();
      final store = _MemoryStore();
      final controller = JellyfinController(
        settings,
        gateway,
        store,
        pollInterval: const Duration(milliseconds: 10),
        pairingLifetime: const Duration(seconds: 2),
        retryDelays: const [Duration(milliseconds: 10)],
      );
      addTearDown(controller.dispose);

      await controller.initialize();
      await controller.setEnabled(true);
      await controller.connect('jellyfin.example.com');

      expect(controller.status, JellyfinStatus.pairing);
      expect(controller.quickConnectCode, '491006');
      expect(settings.jellyfinServerUrl, 'https://jellyfin.example.com');
      expect(gateway.lastDeviceId, isNotEmpty);

      gateway.approved = true;
      await Future<void>.delayed(const Duration(milliseconds: 80));

      expect(controller.status, JellyfinStatus.connected);
      expect(controller.quickConnectCode, isNull);
      expect(store.values[JellyfinController.tokenKey], 'token-1');
      expect(settings.jellyfinUserName, 'wasp');
    },
  );

  test('a saved token is reused on startup without Quick Connect', () async {
    final settings = await _settings({
      'jellyfin.enabled': true,
      'jellyfin.serverUrl': 'https://jellyfin.example.com',
    });
    final store = _MemoryStore()
      ..values[JellyfinController.tokenKey] = 'token-1';
    final gateway = _FakeGateway();
    final controller = JellyfinController(
      settings,
      gateway,
      store,
      pollInterval: const Duration(milliseconds: 10),
      retryDelays: const [Duration(milliseconds: 10)],
    );
    addTearDown(controller.dispose);

    await controller.initialize();
    expect(controller.status, JellyfinStatus.connecting);

    controller.start();
    await Future<void>.delayed(const Duration(milliseconds: 40));

    expect(controller.status, JellyfinStatus.connected);
    expect(controller.serverName, 'DarkTower');
    expect(controller.userName, 'wasp');
    expect(gateway.initiateCalls, 0);
    expect(gateway.userCalls, 1);
  });

  test(
    'a rejected token disables Jellyfin, clears the token, and asks to pair',
    () async {
      final settings = await _settings({
        'jellyfin.enabled': true,
        'jellyfin.serverUrl': 'https://jellyfin.example.com',
      });
      final store = _MemoryStore()
        ..values[JellyfinController.tokenKey] = 'stale-token';
      final gateway = _FakeGateway()..rejectToken = true;
      final controller = JellyfinController(
        settings,
        gateway,
        store,
        retryDelays: const [Duration(milliseconds: 10)],
      );
      addTearDown(controller.dispose);

      await controller.initialize();
      controller.start();
      await Future<void>.delayed(const Duration(milliseconds: 40));

      expect(controller.enabled, isFalse);
      expect(controller.needsRepair, isTrue);
      expect(controller.status, JellyfinStatus.error);
      expect(controller.error, isNotNull);
      expect(store.values.containsKey(JellyfinController.tokenKey), isFalse);
      expect(settings.jellyfinEnabled, isFalse);
      expect(settings.jellyfinServerUrl, 'https://jellyfin.example.com');
    },
  );

  test('an unreachable server is retried and reconnects', () async {
    final settings = await _settings({
      'jellyfin.enabled': true,
      'jellyfin.serverUrl': 'https://jellyfin.example.com',
    });
    final store = _MemoryStore()
      ..values[JellyfinController.tokenKey] = 'token-1';
    final gateway = _FakeGateway()..unreachable = true;
    final controller = JellyfinController(
      settings,
      gateway,
      store,
      retryDelays: const [Duration(milliseconds: 20)],
    );
    addTearDown(controller.dispose);

    await controller.initialize();
    controller.start();
    await Future<void>.delayed(const Duration(milliseconds: 30));

    expect(controller.status, JellyfinStatus.offline);
    expect(controller.enabled, isTrue);
    expect(store.values[JellyfinController.tokenKey], 'token-1');

    gateway.unreachable = false;
    await Future<void>.delayed(const Duration(milliseconds: 80));

    expect(controller.status, JellyfinStatus.connected);
    expect(controller.userName, 'wasp');
  });

  test('urls are normalized with a scheme and without a trailing slash', () {
    expect(
      normalizeJellyfinUrl('jellyfin.example.com')?.toString(),
      'https://jellyfin.example.com/',
    );
    expect(
      normalizeJellyfinUrl('http://host:8096/library')?.toString(),
      'http://host:8096/library/',
    );
    expect(normalizeJellyfinUrl(''), isNull);
    expect(normalizeJellyfinUrl('ftp://host'), isNull);
    expect(displayJellyfinUrl('https://host/'), 'https://host');
  });
}