import 'dart:convert';
import 'dart:developer';
import 'dart:io';

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:google_api_availability/google_api_availability.dart';
import 'package:huawei_push/huawei_push.dart' as h_push;
import 'package:test_sa/controllers/notification/notification_manger.dart';
import 'package:test_sa/models/device/device_transfer.dart';
import 'package:test_sa/models/new_models/gas_refill_model.dart';
import 'package:test_sa/modules/cm_module/cm_detail_page.dart';
import 'package:test_sa/modules/cx_module/survey/survey_page.dart';
import 'package:test_sa/modules/pm_module/ppm_wo/ppm_details_page.dart';
import 'package:test_sa/modules/pm_module/recurrent_wo/recurrent_work_order_view.dart';
import 'package:test_sa/modules/tm_module/device_transfer/device_transfer_details.dart';
import 'package:test_sa/modules/tm_module/tasks/task_request_detail_view.dart';
import 'package:test_sa/modules/tm_module/gas_refill/gas_refill_details.dart';
import 'package:test_sa/new_views/common_widgets/default_app_bar.dart';
import 'package:test_sa/views/widgets/loaders/no_data_found.dart';
import 'package:test_sa/modules/cx_module/chat/services/pending_call_storage.dart';
import 'package:flutter_callkit_incoming/flutter_callkit_incoming.dart';
import 'package:flutter_callkit_incoming/entities/entities.dart';

@pragma('vm:entry-point')
Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  try {
    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
    log('🚀 [BACKGROUND ISOLATE] Handler started', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Push notification received', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Message ID: ${message.messageId}', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Data payload: ${message.data}', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Notification title: ${message.notification?.title}', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Notification body: ${message.notification?.body}', name: 'FirebaseNotificationManger');

    final notificationType = message.data['notificationType'] as String? ??
                             message.data['type'] as String?;
    final transactionType = message.data['transactionType'] as String?;
    
    log('📱 [BACKGROUND] Notification Type: $notificationType', name: 'FirebaseNotificationManger');
    log('📱 [BACKGROUND] Transaction Type: $transactionType', name: 'FirebaseNotificationManger');

    // Handle incoming call notifications
    if (notificationType == 'incoming_call' || transactionType == 'call') {
      log('📞 [BACKGROUND] Incoming call notification detected', name: 'FirebaseNotificationManger');
      log('📞 [BACKGROUND] Call data:', name: 'FirebaseNotificationManger');

      // Extract call data
      final callId = message.data['callId'] as String? ??
                     message.data['sessionId'] as String? ??
                     DateTime.now().millisecondsSinceEpoch.toString();

      final callerId = message.data['callerId'] as String? ??
                       message.data['callerEmployeeNumber'] as String? ??
                       message.data['sourceUserId'] as String? ??
                       'unknown';

      final callerName = message.data['callerName'] as String? ??
                         message.data['callerUserName'] as String? ??
                         message.data['userName'] as String? ??
                         'Unknown Caller';

      final callerEmployeeNumber = message.data['callerEmployeeNumber'] as String? ?? callerId;

      final isVideoCall = () {
        final value = message.data['isVideoCall'];
        if (value is bool) return value;
        if (value is String) return value.toLowerCase() == 'true';
        if (message.data['callType'] == 'video') return true;
        return false;
      }();

      final moduleId = message.data['moduleId'] as String? ??
                       message.data['applicationId']?.toString();
      final referenceId = message.data['referenceId'] as String?;
      final conversationId = message.data['conversationId'] as String?;

      log('   - callId: $callId', name: 'FirebaseNotificationManger');
      log('   - callerId: $callerId', name: 'FirebaseNotificationManger');
      log('   - callerName: $callerName', name: 'FirebaseNotificationManger');
      log('   - callerEmployeeNumber: $callerEmployeeNumber', name: 'FirebaseNotificationManger');
      log('   - isVideoCall: $isVideoCall', name: 'FirebaseNotificationManger');
      log('   - moduleId: $moduleId', name: 'FirebaseNotificationManger');
      log('   - referenceId: $referenceId', name: 'FirebaseNotificationManger');
      log('   - conversationId: $conversationId', name: 'FirebaseNotificationManger');

      // CRITICAL FIX: DO NOT initialize any communication services in background isolate
      // Only persist call data and show CallKit

      log('💾 [BACKGROUND] Saving call data to SharedPreferences...', name: 'FirebaseNotificationManger');
      await PendingCallStorage.savePendingCall(
        callId: callId,
        callerId: callerId,
        callerName: callerName,
        callerEmployeeNumber: callerEmployeeNumber,
        isVideoCall: isVideoCall,
        moduleId: moduleId,
        referenceId: referenceId,
        conversationId: conversationId,
      );
      log('✅ [BACKGROUND] Call data saved successfully', name: 'FirebaseNotificationManger');

      // Show CallKit incoming call UI
      log('📱 [BACKGROUND] Displaying CallKit UI...', name: 'FirebaseNotificationManger');
      final callKitParams = CallKitParams(
        id: callId,
        nameCaller: callerName,
        appName: 'ATOMS',
        avatar: '',
        handle: callerEmployeeNumber,
        type: isVideoCall ? 1 : 0,
        duration: 30000,
        missedCallNotification: const NotificationParams(
          showNotification: true,
          isShowCallback: true,
          subtitle: 'Missed call',
          callbackText: 'Call back',
        ),
        extra: {
          'callId': callId,
          'callerId': callerId,
          'callerEmployeeNumber': callerEmployeeNumber,
          'callerName': callerName,
          'moduleId': moduleId ?? '',
          'referenceId': referenceId ?? '',
          'conversationId': conversationId ?? '',
          'isVideoCall': isVideoCall,
          'timestamp': DateTime.now().toIso8601String(),
        },
        android: const AndroidParams(
          isCustomNotification: true,
          isShowLogo: false,
          ringtonePath: 'system_ringtone_default',
          backgroundColor: '#0955fa',
          backgroundUrl: '',
          actionColor: '#4CAF50',
          textColor: '#ffffff',
          incomingCallNotificationChannelName: 'Incoming Calls',
          missedCallNotificationChannelName: 'Missed Calls',
        ),
        ios: const IOSParams(
          iconName: 'CallKitLogo',
          handleType: 'generic',
          supportsVideo: true,
          maximumCallGroups: 1,
          maximumCallsPerCallGroup: 1,
          audioSessionMode: 'default',
          audioSessionActive: true,
          audioSessionPreferredSampleRate: 44100.0,
          audioSessionPreferredIOBufferDuration: 0.005,
          supportsDTMF: true,
          supportsHolding: false,
          supportsGrouping: false,
          supportsUngrouping: false,
          ringtonePath: 'system_ringtone_default',
        ),
      );

      await FlutterCallkitIncoming.showCallkitIncoming(callKitParams);
      log('✅ [BACKGROUND] CallKit UI displayed', name: 'FirebaseNotificationManger');
      log('ℹ️ [BACKGROUND] Main isolate will initialize communication services when app resumes', name: 'FirebaseNotificationManger');
    } else {
      log('📱 [BACKGROUND] Non-call notification type', name: 'FirebaseNotificationManger');
    }

    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
  } catch (e, stackTrace) {
    log('❌ [BACKGROUND] Error handling background message: $e', 
        name: 'FirebaseNotificationManger', error: e, stackTrace: stackTrace);
  }
}

class FirebaseNotificationManger {
  static FirebaseMessaging messaging = FirebaseMessaging.instance;
  static String? token;

  static Future<void> getToken() async {
    NotificationSettings settings = await messaging.requestPermission(alert: true, announcement: false, badge: true, carPlay: false, criticalAlert: false, provisional: false, sound: true);

    if (Platform.isAndroid) {
      try {
        if (!(await isGoogleServicesAvailable())) {
          h_push.Push.enableLogger();
          await h_push.Push.setAutoInitEnabled(true);
          h_push.Push.onMessageReceivedStream.listen(_onMessageReceived, onError: _onMessageReceiveError);

          h_push.Push.getTokenStream.listen((hToken) {
            // onToken(token);
            // print("Huawei Token: ${hToken}");
            token = hToken;
          }, onError: (e) {
            print("Huawei TokenError" + e.toString());
          });
          h_push.Push.getToken('');
        } else {
          if (settings.authorizationStatus == AuthorizationStatus.authorized) {
            try {
              token = await messaging.getToken();
            } catch (ex) {}
          }
        }
      } catch (ex) {
        print("Notification Exception: " + ex.toString());
      }
    } else {
      if (settings.authorizationStatus == AuthorizationStatus.authorized) {
        try {
          token = await messaging.getToken();
        } catch (ex) {}
      }
    }
    //print("pushToken:$token");
  }

  static void _onMessageReceived(h_push.RemoteMessage remoteMessage) {
    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
    log('📱 [HUAWEI] Message received', name: 'FirebaseNotificationManger');
    log('📱 [HUAWEI] Full message data: ${remoteMessage.toMap()}', name: 'FirebaseNotificationManger');
    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
  }

  static void _onMessageReceiveError(Object error) {
    log('❌ [HUAWEI] Message receive error: ${error.toString()}', name: 'FirebaseNotificationManger');
  }

  static Future<bool> isGoogleServicesAvailable() async {
    try {
      GooglePlayServicesAvailability availability = await GoogleApiAvailability.instance.checkGooglePlayServicesAvailability();
      String status = availability.toString().split('.').last;
      if (status == "success") {
        return true;
      }
      return false;
    } catch (ex) {
      return false;
    }
  }

  static Future<void> handleMessage(context, Map<String, dynamic> messageData) async {
    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Processing notification', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Full message data: $messageData', name: 'FirebaseNotificationManger');

    // FIXED: Check if this is a call notification first - CHECK BOTH 'notificationType' AND 'type'
    final notificationType = messageData['notificationType'] as String? ??
                             messageData['type'] as String?; // Backend uses 'type'
    final transactionType = messageData['transactionType'] as String?;
    
    log('📱 [HANDLE_MESSAGE] Notification Type: $notificationType', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Transaction Type: $transactionType', name: 'FirebaseNotificationManger');

    if (notificationType == 'incoming_call' || transactionType == 'call') {
      log('📞 [FOREGROUND] Incoming call notification detected', name: 'FirebaseNotificationManger');
      log('📞 [FOREGROUND] Call data:', name: 'FirebaseNotificationManger');
      log('   - callId: ${messageData['callId']}', name: 'FirebaseNotificationManger');
      log('   - callerId: ${messageData['callerId']}', name: 'FirebaseNotificationManger');
      log('   - calleeEmployeeNumber: ${messageData['calleeEmployeeNumber']}', name: 'FirebaseNotificationManger');
      log('   - callerName: ${messageData['callerName']}', name: 'FirebaseNotificationManger');
      log('   - callerUserName: ${messageData['callerUserName']}', name: 'FirebaseNotificationManger');
      log('   - callerEmployeeNumber: ${messageData['callerEmployeeNumber']}', name: 'FirebaseNotificationManger');
      log('   - isVideoCall: ${messageData['isVideoCall']}', name: 'FirebaseNotificationManger');
      log('   - callType: ${messageData['callType']}', name: 'FirebaseNotificationManger');
      log('   - moduleId: ${messageData['moduleId']}', name: 'FirebaseNotificationManger');
      log('   - referenceId: ${messageData['referenceId']}', name: 'FirebaseNotificationManger');
      log('   - conversationId: ${messageData['conversationId']}', name: 'FirebaseNotificationManger');
      log('   - applicationId: ${messageData['applicationId']}', name: 'FirebaseNotificationManger');

      // CRITICAL FIX: Show CallKit UI in foreground just like background
      // Extract call data (same as background handler)
      final callId = messageData['callId'] as String? ??
                     messageData['sessionId'] as String? ??
                     DateTime.now().millisecondsSinceEpoch.toString();

      final callerId = messageData['callerId'] as String? ??
                       messageData['callerEmployeeNumber'] as String? ??
                       messageData['sourceUserId'] as String? ??
                       'unknown';

      final callerName = messageData['callerName'] as String? ??
                         messageData['callerUserName'] as String? ??
                         messageData['userName'] as String? ??
                         'Unknown Caller';

      final callerEmployeeNumber = messageData['callerEmployeeNumber'] as String? ?? callerId;

      final isVideoCall = () {
        final value = messageData['isVideoCall'];
        if (value is bool) return value;
        if (value is String) return value.toLowerCase() == 'true';
        if (messageData['callType'] == 'video') return true;
        return false;
      }();

      final moduleId = messageData['moduleId'] as String? ??
                       messageData['applicationId']?.toString();
      final referenceId = messageData['referenceId'] as String?;
      final conversationId = messageData['conversationId'] as String?;

      log('📱 [FOREGROUND] Showing CallKit UI...', name: 'FirebaseNotificationManger');

      // Show CallKit UI using CallKitService
      try {
        final callKitParams = CallKitParams(
          id: callId,
          nameCaller: callerName,
          appName: 'ATOMS',
          avatar: '',
          handle: callerEmployeeNumber,
          type: isVideoCall ? 1 : 0,
          duration: 30000,
          missedCallNotification: const NotificationParams(
            showNotification: true,
            isShowCallback: true,
            subtitle: 'Missed call',
            callbackText: 'Call back',
          ),
          extra: {
            'callId': callId,
            'callerId': callerId,
            'callerEmployeeNumber': callerEmployeeNumber,
            'callerName': callerName,
            'moduleId': moduleId ?? '',
            'referenceId': referenceId ?? '',
            'conversationId': conversationId ?? '',
            'isVideoCall': isVideoCall,
            'timestamp': DateTime.now().toIso8601String(),
          },
          android: const AndroidParams(
            isCustomNotification: true,
            isShowLogo: false,
            ringtonePath: 'system_ringtone_default',
            backgroundColor: '#0955fa',
            backgroundUrl: '',
            actionColor: '#4CAF50',
            textColor: '#ffffff',
            incomingCallNotificationChannelName: 'Incoming Calls',
            missedCallNotificationChannelName: 'Missed Calls',
          ),
          ios: const IOSParams(
            iconName: 'CallKitLogo',
            handleType: 'generic',
            supportsVideo: true,
            maximumCallGroups: 1,
            maximumCallsPerCallGroup: 1,
            audioSessionMode: 'default',
            audioSessionActive: true,
            audioSessionPreferredSampleRate: 44100.0,
            audioSessionPreferredIOBufferDuration: 0.005,
            supportsDTMF: true,
            supportsHolding: false,
            supportsGrouping: false,
            supportsUngrouping: false,
            ringtonePath: 'system_ringtone_default',
          ),
        );

        await FlutterCallkitIncoming.showCallkitIncoming(callKitParams);
        log('✅ [FOREGROUND] CallKit UI displayed successfully', name: 'FirebaseNotificationManger');
        log('ℹ️ [FOREGROUND] SignalR OnIncomingCallAsync will handle call state in CallManager', name: 'FirebaseNotificationManger');
      } catch (e, stackTrace) {
        log('❌ [FOREGROUND] Failed to show CallKit UI: $e\nStack: $stackTrace', name: 'FirebaseNotificationManger');
      }

      log('���══════════════════════════════════════════', name: 'FirebaseNotificationManger');
      return;
    }

    log('📱 [HANDLE_MESSAGE] Non-call notification - processing normally', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Request Type: ${messageData["requestType"]}', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Request Number: ${messageData["requestNumber"]}', name: 'FirebaseNotificationManger');
    log('📱 [HANDLE_MESSAGE] Module ID: ${messageData["moduleId"]}', name: 'FirebaseNotificationManger');

    if (messageData["requestType"] != null && messageData["requestNumber"] != null) {
      Widget? serviceClass;

      String? transactionType = messageData["transactionType"]?.toString();

      if (transactionType == null) {
        return;
      } else if (transactionType == "17" && messageData["requestType"] == "chat") {
        int moduleId = int.parse(messageData["moduleId"].toString());
        int requestNumber = int.parse(messageData["requestNumber"].toString());

        switch (moduleId) {
          case 1: // cm
            serviceClass = CMDetailPage(requestId: requestNumber, moduleId: moduleId);
            break;
          case 2: // gas refill
            serviceClass = GasRefillDetailsPage(
              priority: messageData["priority"],
              date: messageData["createdOn"],
              moduleId: moduleId,
              model: GasRefillModel(id: requestNumber),
            );
            break;
          case 3: //transfer
            serviceClass = DeviceTransferDetails(model: DeviceTransfer(id: requestNumber), moduleId: moduleId);
            break;
          case 6: // task
            serviceClass = TaskRequestDetailsView(
              taskId: requestNumber,
              moduleId: moduleId,
              // requestDetails: RequestsDetails(nameOfType: requestData?.nameOfType, status: requestData?.statusName, priority: requestData?.priorityName, date: requestData?.transactionDate,                  ),
            );
            // ServiceRequestDetailMain(requestId: int.parse(messageData["requestNumber"].toString()), moduleId: 1);
            break;

          default:
            serviceClass = const Scaffold(appBar: DefaultAppBar(), body: Center(child: NoDataFound()));
        }

        Navigator.of(context).push(MaterialPageRoute(builder: (_) => serviceClass!));
        return;
      }

      // PPM=1,
      //   ServiceRequestEngineer = 3,
      //   AssetTransfer=7,
      //   SparePartTransaction= 8,
      //   GasRefill=9,
      //   TechnicalRetirmentWO = 11,
      //   Recurrent = 12,
      switch (transactionType) {
        case "1":
          serviceClass = PpmDetailsPage(requestId: int.parse(messageData["requestNumber"].toString()));
          break;
        //these three request are same corrective maintenance....
        case "3":
          serviceClass = CMDetailPage(requestId: int.parse(messageData["requestNumber"].toString()), moduleId: 1);
          break;
        case "8":
          serviceClass = CMDetailPage(requestId: int.parse(messageData["requestNumber"].toString()), moduleId: 1);
          break;
        case "11":
          serviceClass = CMDetailPage(requestId: int.parse(messageData["requestNumber"].toString()), moduleId: 1);
          break;
        case "7":
          serviceClass = DeviceTransferDetails(model: DeviceTransfer(id: int.parse(messageData["requestNumber"].toString())), moduleId: 3);
          break;
        case "9":
          serviceClass = GasRefillDetailsPage(
            priority: messageData["priority"],
            date: messageData["createdOn"],
            moduleId: 2,
            model: GasRefillModel(id: int.parse(messageData["requestNumber"].toString())),
          );
          break;
        case "12":
          serviceClass = RecurrentWorkOrderView(taskId: int.parse(messageData["requestNumber"].toString()));
        case "17":
          serviceClass = SurveyPage(surveyId: int.parse(messageData["requestNumber"].toString()));

        //Didn't handle task request yet...
        // case 6:
        //   serviceClass = TaskRequestDetailsView(
        //       taskId: int.parse(messageData["requestNumber"].toString()),
        //       requestDetails: RequestsDetails(nameOfType: messageData["sourceName"], status: messageData["statusName"], priority: messageData["priorityName"], date: messageData["createdDate"]));
        //   return;
        default:
          serviceClass = const Scaffold(appBar: DefaultAppBar(), body: Center(child: NoDataFound()));
      }

      // if (messageData["requestType"] == "Service request to engineer") {
      //   serviceClass = ServiceRequestDetailMain(requestId: messageData["requestNumber"] ?? '');
      // } else if (messageData["requestType"] == "Gas Refill") {
      //   serviceClass = GasRefillDetailsPage(
      //     priority: messageData["priority"],
      //     date: messageData["createdOn"],
      //     model: GasRefillModel(id: int.parse(messageData["requestNumber"].toString())),
      //   );
      // } else if (messageData["requestType"] == "Asset Transfer") {
      //   serviceClass = DeviceTransferDetails(model: DeviceTransfer(id: int.parse(messageData["requestNumber"].toString())));
      // } else if (messageData["requestType"] == "PPM") {
      //   serviceClass = PpmDetailsPage(requestId: int.parse(messageData["requestNumber"].toString()));
      // }
      // else if (data["requestType"] == "WorkOrder") {
      //
      // }
      Navigator.of(context).push(MaterialPageRoute(builder: (_) => serviceClass!));
    }
    log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
  }

  static initialized(BuildContext context) async {
    log('🔧 [INIT] Initializing FirebaseNotificationManger', name: 'FirebaseNotificationManger');

//TOD0 add platform check here also
    if (!(await isGoogleServicesAvailable()) && Platform.isAndroid) {
      log('📱 [INIT] Using Huawei Push Services', name: 'FirebaseNotificationManger');

      // NEW: Handle Huawei initial notification
      var initialNotification = await h_push.Push.getInitialNotification();
      if (initialNotification != null) {
        log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
        log('📱 [HUAWEI_INITIAL] Initial notification found', name: 'FirebaseNotificationManger');
        log('📱 [HUAWEI_INITIAL] Full data: $initialNotification', name: 'FirebaseNotificationManger');

        Map<String, dynamic> remoteData = Map<String, dynamic>.from(initialNotification["extras"] as Map);
        log('📱 [HUAWEI_INITIAL] Extras data: $remoteData', name: 'FirebaseNotificationManger');

        // Check if it's a call notification
        final notificationType = remoteData['notificationType'] as String?;
        log('📱 [HUAWEI_INITIAL] Notification Type: $notificationType', name: 'FirebaseNotificationManger');

        if (notificationType == 'incoming_call') {
          log('📞 [HUAWEI_INITIAL] Call notification - will be handled by SignalR', name: 'FirebaseNotificationManger');
          // In foreground, SignalR will handle via OnReceiveCall event
        } else {
          log('📱 [HUAWEI_INITIAL] Processing regular notification', name: 'FirebaseNotificationManger');
          handleMessage(context, remoteData);
        }
        log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
      } else {
        log('📱 [HUAWEI_INITIAL] No initial notification', name: 'FirebaseNotificationManger');
      }

      h_push.Push.onNotificationOpenedApp.listen((message) {
        try {
          log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
          log('📱 [HUAWEI_TAP] Notification tapped', name: 'FirebaseNotificationManger');
          log('📱 [HUAWEI_TAP] Message type: ${message.runtimeType}', name: 'FirebaseNotificationManger');
          log('📱 [HUAWEI_TAP] Full message: $message', name: 'FirebaseNotificationManger');

          if (message is Map<String, dynamic>) {
            Map<String, dynamic> remoteData = message;
            remoteData = remoteData["extras"];
            log('📱 [HUAWEI_TAP] Extras data: $remoteData', name: 'FirebaseNotificationManger');

            // Check if it's a call notification
            final notificationType = remoteData['notificationType'] as String?;
            log('📱 [HUAWEI_TAP] Notification Type: $notificationType', name: 'FirebaseNotificationManger');

            if (notificationType == 'incoming_call') {
              log('📞 [HUAWEI_TAP] Call notification - will be handled by SignalR', name: 'FirebaseNotificationManger');
              // In foreground, SignalR will handle via OnReceiveCall event
            } else {
              log('📱 [HUAWEI_TAP] Processing regular notification', name: 'FirebaseNotificationManger');
              handleMessage(context, remoteData);
            }
          }
          log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
        } catch (ex) {
          log('❌ [HUAWEI_TAP] Parsing error: $ex', name: 'FirebaseNotificationManger');
        }
      }, onError: (e) => log('❌ [HUAWEI_TAP] Error: ${e.toString()}', name: 'FirebaseNotificationManger'));
      return;
    }

    log('📱 [INIT] Using Firebase Cloud Messaging (FCM)', name: 'FirebaseNotificationManger');

    NotificationSettings settings;

    try {
      settings = await messaging.requestPermission(
        alert: true,
        announcement: false,
        badge: true,
        carPlay: false,
        criticalAlert: false,
        provisional: false,
        sound: true,
      );
      log('✅ [INIT] Notification permissions granted: ${settings.authorizationStatus}', name: 'FirebaseNotificationManger');
    } catch (error) {
      log('❌ [INIT] Permission request failed: $error', name: 'FirebaseNotificationManger');
      return;
    }

    if (settings.authorizationStatus != AuthorizationStatus.authorized) {
      log('⚠️ [INIT] Notifications not authorized', name: 'FirebaseNotificationManger');
      return;
    }

    await FirebaseMessaging.instance.setAutoInitEnabled(true);
    await FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(alert: true, badge: true, sound: true);

    FirebaseMessaging.instance.getInitialMessage().then((initialMessage) {
      if (initialMessage != null) {
        log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Initial message found', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Message ID: ${initialMessage.messageId}', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Data: ${initialMessage.data}', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Title: ${initialMessage.notification?.title}', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Body: ${initialMessage.notification?.body}', name: 'FirebaseNotificationManger');

        // Check if it's a call notification
        final notificationType = initialMessage.data['notificationType'] as String? ??
                                 initialMessage.data['type'] as String?;
        final transactionType = initialMessage.data['transactionType'] as String?;
        log('📱 [FCM_INITIAL] Notification Type: $notificationType', name: 'FirebaseNotificationManger');
        log('📱 [FCM_INITIAL] Transaction Type: $transactionType', name: 'FirebaseNotificationManger');

        if (notificationType == 'incoming_call' || transactionType == 'call') {
          log('📞 [FCM_INITIAL] Call notification detected', name: 'FirebaseNotificationManger');
          log('   ℹ️ Background handler already saved this call to SharedPreferences', name: 'FirebaseNotificationManger');
          log('   ℹ️ AppLifecycleObserver will restore the call when app initializes', name: 'FirebaseNotificationManger');
          log('   ℹ️ Skipping duplicate processing', name: 'FirebaseNotificationManger');
        } else {
          log('📱 [FCM_INITIAL] Processing regular notification', name: 'FirebaseNotificationManger');
          handleMessage(context, initialMessage.data);
        }
        log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
      } else {
        log('📱 [FCM_INITIAL] No initial message', name: 'FirebaseNotificationManger');
      }
    });

    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
      log('📱 [FCM_FOREGROUND] Message received', name: 'FirebaseNotificationManger');
      log('📱 [FCM_FOREGROUND] Message ID: ${message.messageId}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_FOREGROUND] Data: ${message.data}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_FOREGROUND] Title: ${message.notification?.title}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_FOREGROUND] Body: ${message.notification?.body}', name: 'FirebaseNotificationManger');

      // FIXED: Check if it's a call notification - CHECK BOTH 'notificationType' AND 'type'
      final notificationType = message.data['notificationType'] as String? ??
                               message.data['type'] as String?; // Backend uses 'type'
      log('📱 [FCM_FOREGROUND] Notification Type: $notificationType', name: 'FirebaseNotificationManger');

      if (notificationType == 'incoming_call') {
        log('📞 [FOREGROUND] Incoming call via FCM', name: 'FirebaseNotificationManger');
        log('📞 [FCM_FOREGROUND] Call data:', name: 'FirebaseNotificationManger');
        log('   - callId: ${message.data['callId']}', name: 'FirebaseNotificationManger');
        log('   - callerId: ${message.data['callerId']}', name: 'FirebaseNotificationManger');
        log('   - calleeEmployeeNumber: ${message.data['calleeEmployeeNumber']}', name: 'FirebaseNotificationManger');
        log('   - callerName: ${message.data['callerName']}', name: 'FirebaseNotificationManger');
        log('   - callerUserName: ${message.data['callerUserName']}', name: 'FirebaseNotificationManger');
        log('   - callerEmployeeNumber: ${message.data['callerEmployeeNumber']}', name: 'FirebaseNotificationManger');
        log('   - isVideoCall: ${message.data['isVideoCall']}', name: 'FirebaseNotificationManger');
        log('   - callType: ${message.data['callType']}', name: 'FirebaseNotificationManger');
        log('   - applicationId: ${message.data['applicationId']}', name: 'FirebaseNotificationManger');

        // CRITICAL FIX: Show CallKit UI in foreground
        final callId = message.data['callId'] as String? ??
                       message.data['sessionId'] as String? ??
                       DateTime.now().millisecondsSinceEpoch.toString();

        final callerId = message.data['callerId'] as String? ??
                         message.data['callerEmployeeNumber'] as String? ??
                         message.data['sourceUserId'] as String? ??
                         'unknown';

        final callerName = message.data['callerName'] as String? ??
                           message.data['callerUserName'] as String? ??
                           message.data['userName'] as String? ??
                           'Unknown Caller';

        final callerEmployeeNumber = message.data['callerEmployeeNumber'] as String? ?? callerId;

        final isVideoCall = () {
          final value = message.data['isVideoCall'];
          if (value is bool) return value;
          if (value is String) return value.toLowerCase() == 'true';
          if (message.data['callType'] == 'video') return true;
          return false;
        }();

        final moduleId = message.data['moduleId'] as String? ??
                         message.data['applicationId']?.toString();
        final referenceId = message.data['referenceId'] as String?;
        final conversationId = message.data['conversationId'] as String?;

        log('📱 [FOREGROUND] Showing CallKit UI...', name: 'FirebaseNotificationManger');

        try {
          final callKitParams = CallKitParams(
            id: callId,
            nameCaller: callerName,
            appName: 'ATOMS',
            avatar: '',
            handle: callerEmployeeNumber,
            type: isVideoCall ? 1 : 0,
            duration: 30000,
            missedCallNotification: const NotificationParams(
              showNotification: true,
              isShowCallback: true,
              subtitle: 'Missed call',
              callbackText: 'Call back',
            ),
            extra: {
              'callId': callId,
              'callerId': callerId,
              'callerEmployeeNumber': callerEmployeeNumber,
              'callerName': callerName,
              'moduleId': moduleId ?? '',
              'referenceId': referenceId ?? '',
              'conversationId': conversationId ?? '',
              'isVideoCall': isVideoCall,
              'timestamp': DateTime.now().toIso8601String(),
            },
            android: const AndroidParams(
              isCustomNotification: true,
              isShowLogo: false,
              ringtonePath: 'system_ringtone_default',
              backgroundColor: '#0955fa',
              backgroundUrl: '',
              actionColor: '#4CAF50',
              textColor: '#ffffff',
              incomingCallNotificationChannelName: 'Incoming Calls',
              missedCallNotificationChannelName: 'Missed Calls',
            ),
            ios: const IOSParams(
              iconName: 'CallKitLogo',
              handleType: 'generic',
              supportsVideo: true,
              maximumCallGroups: 1,
              maximumCallsPerCallGroup: 1,
              audioSessionMode: 'default',
              audioSessionActive: true,
              audioSessionPreferredSampleRate: 44100.0,
              audioSessionPreferredIOBufferDuration: 0.005,
              supportsDTMF: true,
              supportsHolding: false,
              supportsGrouping: false,
              supportsUngrouping: false,
              ringtonePath: 'system_ringtone_default',
            ),
          );

          FlutterCallkitIncoming.showCallkitIncoming(callKitParams);
          log('✅ [FOREGROUND] CallKit UI displayed successfully', name: 'FirebaseNotificationManger');
          log('ℹ️ [FOREGROUND] SignalR OnIncomingCallAsync will handle call state in CallManager', name: 'FirebaseNotificationManger');
        } catch (e, stackTrace) {
          log('❌ [FOREGROUND] Failed to show CallKit UI: $e\nStack: $stackTrace', name: 'FirebaseNotificationManger');
        }

        log('══════════════════════════════════════════', name: 'FirebaseNotificationManger');
        return;
      }

      log('📱 [FCM_FOREGROUND] Non-call notification', name: 'FirebaseNotificationManger');
      log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');

      if (Platform.isAndroid) {
        if (message.data["notificationType"] != 'NurseConfirmArrive') {
          NotificationManger.showNotification(
              title: message.notification?.title ?? "", 
              subtext: message.notification?.body ?? "", 
              hashcode: int.tryParse("1234") ?? 1,
              payload: json.encode(message.data),
              context: context);
        }
      }
      return;
    });
    
    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
      log('📱 [FCM_TAP] Notification tapped', name: 'FirebaseNotificationManger');
      log('📱 [FCM_TAP] Message ID: ${message.messageId}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_TAP] Data: ${message.data}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_TAP] Title: ${message.notification?.title}', name: 'FirebaseNotificationManger');
      log('📱 [FCM_TAP] Body: ${message.notification?.body}', name: 'FirebaseNotificationManger');

      // NEW: Check if it's a call notification
      final notificationType = message.data['notificationType'] as String?;
      log('📱 [FCM_TAP] Notification Type: $notificationType', name: 'FirebaseNotificationManger');

      if (notificationType == 'incoming_call') {
        log('📞 [NOTIFICATION TAP] Call notification tapped - will be handled by SignalR', name: 'FirebaseNotificationManger');
        // In foreground, SignalR will handle via OnReceiveCall event
      } else {
        log('📱 [FCM_TAP] Processing regular notification', name: 'FirebaseNotificationManger');
        handleMessage(context, message.data);
      }
      log('═══════════════════════════════════════════', name: 'FirebaseNotificationManger');
    });
    
    FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);

    log('✅ [INIT] FirebaseNotificationManger initialized successfully', name: 'FirebaseNotificationManger');
  }
}