import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:search_engine/services/live_activities_service.dart';

class NotificationService {
  static final NotificationService _instance = NotificationService._internal();
  factory NotificationService() => _instance;
  NotificationService._internal();

  final FlutterLocalNotificationsPlugin _notifications =
      FlutterLocalNotificationsPlugin();
  bool _isLiveActivitiesSupported = false;
  bool _isLiveActivitiesInitialized = false;

  // Variables para manejo condicional de LiveActivities
  dynamic _liveActivities;

  // Method to create LiveActivities instance
  dynamic createLiveActivitiesInstance() {
    if (Platform.isIOS) {
      return LiveActivitiesService();
    }
    return null;
  }

  Future<void> initialize() async {
    // Inicializar notificaciones normales
    const initializationSettingsAndroid =
        AndroidInitializationSettings('@mipmap/ic_launcher');
    const initializationSettingsIOS = DarwinInitializationSettings(
      requestAlertPermission: true,
      requestBadgePermission: true,
      requestSoundPermission: true,
    );
    const initializationSettings = InitializationSettings(
      android: initializationSettingsAndroid,
      iOS: initializationSettingsIOS,
    );
    await _notifications.initialize(initializationSettings);

    // Inicializar Live Activities solo en iOS
    if (Platform.isIOS) {
      try {
        await _initializeLiveActivities();
      } catch (e) {
        print('Error al inicializar Live Activities: $e');
        _isLiveActivitiesSupported = false;
      }
    }
  }

  Future<void> _initializeLiveActivities() async {
    try {
      // Intentamos crear una instancia de LiveActivities de forma segura
      _liveActivities = createLiveActivitiesInstance();

      if (_liveActivities != null) {
        try {
          await _liveActivities.init(
              appGroupId:
                  'group.com.lgcc.search', // Reemplazar con tu App Group ID
              urlScheme: 'lgcc' // Reemplazar con tu URL scheme
              );

          // Verificamos si están habilitadas
          _isLiveActivitiesSupported =
              await _liveActivities.areActivitiesEnabled();
          _isLiveActivitiesInitialized = true;

          print('LiveActivities inicializadas: $_isLiveActivitiesSupported');
        } catch (e) {
          print('Error al inicializar LiveActivities: $e');
          _isLiveActivitiesSupported = false;
          _isLiveActivitiesInitialized = false;
        }
      } else {
        print('LiveActivities no disponible en este dispositivo');
        _isLiveActivitiesSupported = false;
        _isLiveActivitiesInitialized = false;
      }
    } catch (e) {
      print('Error al crear instancia de LiveActivities: $e');
      _isLiveActivitiesSupported = false;
      _isLiveActivitiesInitialized = false;
    }
  }

  Future<void> showSearchNotification({
    required String title,
    required String body,
    String? searchTerm,
    int? totalResults,
  }) async {
    if (_isLiveActivitiesSupported &&
        _isLiveActivitiesInitialized &&
        Platform.isIOS &&
        _liveActivities != null) {
      // Usar Live Activities en iOS 16.1+
      try {
        final Map<String, dynamic> activityModel = {
          'title': title,
          'body': body,
          'searchTerm': searchTerm ?? '',
          'totalResults': totalResults ?? 0,
          'timestamp': DateTime.now().millisecondsSinceEpoch,
        };

        final activityId = await _liveActivities.createActivity(activityModel);
        print('LiveActivity creada con éxito: $activityId');
        return;
      } catch (e) {
        print('Error al crear LiveActivity: $e');
        // Si falla, usamos notificación estándar como fallback
      }
    }

    // Usar notificación normal en Android o iOS < 16.1 o si falló Live Activities
    await _showNormalNotification(title: title, body: body);
  }

  Future<void> _showNormalNotification({
    required String title,
    required String body,
  }) async {
    const androidDetails = AndroidNotificationDetails(
      'search_channel',
      'Search Notifications',
      channelDescription: 'Notifications for search results',
      importance: Importance.high,
      priority: Priority.high,
    );

    const iosDetails = DarwinNotificationDetails(
      presentAlert: true,
      presentBadge: true,
      presentSound: true,
    );

    const details = NotificationDetails(
      android: androidDetails,
      iOS: iosDetails,
    );

    await _notifications.show(
      DateTime.now().millisecond,
      title,
      body,
      details,
    );

    print('Notificación estándar mostrada');
  }

  Future<void> updateSearchActivity({
    required String activityId,
    required Map<String, dynamic> data,
  }) async {
    if (_isLiveActivitiesSupported &&
        _isLiveActivitiesInitialized &&
        Platform.isIOS &&
        _liveActivities != null) {
      try {
        await _liveActivities.updateActivity(activityId, data);
        print('LiveActivity actualizada: $activityId');
      } catch (e) {
        print('Error al actualizar LiveActivity: $e');
      }
    }
  }

  Future<void> endSearchActivity(String activityId) async {
    if (_isLiveActivitiesSupported &&
        _isLiveActivitiesInitialized &&
        Platform.isIOS &&
        _liveActivities != null) {
      try {
        await _liveActivities.endActivity(activityId);
        print('LiveActivity finalizada: $activityId');
      } catch (e) {
        print('Error al finalizar LiveActivity: $e');
      }
    }
  }

  void dispose() async {
    if (_isLiveActivitiesSupported &&
        _isLiveActivitiesInitialized &&
        Platform.isIOS &&
        _liveActivities != null) {
      try {
        await _liveActivities.dispose();
      } catch (e) {
        print('Error al liberar LiveActivities: $e');
      }
    }
  }
}