import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'dart:convert';
import 'dart:io' show Platform;

class PushNotificationService {
  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging.instance;
  final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =
      FlutterLocalNotificationsPlugin();
  static const String _channelId = 'visitRequest';
  static const String _channelName = 'Visitas';
  static const String _channelDescription = 'Solicitação de visita';

  Future<void> initialize() async {
    var initializationSettingsAndroid =
        const AndroidInitializationSettings('ic_launcher');
    var initializationSettingsIOS = const DarwinInitializationSettings(
      requestAlertPermission: true,
      requestBadgePermission: true,
      requestSoundPermission: true,
    );
    var initializationSettings = InitializationSettings(
      android: initializationSettingsAndroid,
      iOS: initializationSettingsIOS,
    );
    await _flutterLocalNotificationsPlugin.initialize(initializationSettings);
    if (Platform.isAndroid) {
      var channel = const AndroidNotificationChannel(
        _channelId,
        _channelName,
        description: _channelDescription,
        importance: Importance.high,
      );
      await _flutterLocalNotificationsPlugin
          .resolvePlatformSpecificImplementation<
              AndroidFlutterLocalNotificationsPlugin>()
          ?.createNotificationChannel(channel);
    }
    await Firebase.initializeApp();
    FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
    FirebaseMessaging.onMessage.listen(_handleMessage);
    FirebaseMessaging.onMessageOpenedApp.listen(_handleMessage);
    NotificationSettings settings = await _firebaseMessaging.requestPermission(
      alert: true,
      badge: true,
      sound: true,
    );
    debugPrint('User granted permission: ${settings.authorizationStatus}');
  }

  void _handleMessage(RemoteMessage message) {
    RemoteNotification? notification = message.notification;
    AndroidNotification? android = message.notification?.android;
    Map<String, dynamic> data = message.data;

    // Verifica se há um clickAction e se é um visit_request
    String? clickAction = data['clickAction'];
    if (clickAction != null && clickAction == "visit_request") {
      // Implementa a lógica específica para visit_request
      // Por exemplo, exibir uma notificação específica para visit_request
      if (notification != null && android != null) {
        var androidPlatformChannelSpecifics = const AndroidNotificationDetails(
          _channelId,
          _channelName,
          channelDescription: "Descrição específica para visit_request",
          importance: Importance.max,
          priority: Priority.high,
        );
        var platformChannelSpecifics = NotificationDetails(
          android: androidPlatformChannelSpecifics,
        );
        _flutterLocalNotificationsPlugin.show(
          notification.hashCode,
          "Título específico para visit_request",
          "Corpo específico para visit_request",
          platformChannelSpecifics,
          payload:
              "Dados adicionais que podem ser usados ao tocar na notificação",
        );
      }
    } else if (notification != null && android != null) {
      // Trata outras notificações como normalmente
      var androidPlatformChannelSpecifics = const AndroidNotificationDetails(
        _channelId,
        _channelName,
        channelDescription: _channelDescription,
        importance: Importance.max,
        priority: Priority.high,
      );
      var platformChannelSpecifics = NotificationDetails(
        android: androidPlatformChannelSpecifics,
      );
      _flutterLocalNotificationsPlugin.show(
        notification.hashCode,
        notification.title,
        notification.body,
        platformChannelSpecifics,
      );
    }
  }

  Future<void> _firebaseMessagingBackgroundHandler(
      RemoteMessage message) async {
    await Firebase.initializeApp();
    print("Handling a background message: ${message.messageId}");
  }
}