queuing_system/lib/home/app_provider.dart

import 'dart:async';
import 'dart:developer';
import 'dart:io';

import 'package:connectivity/connectivity.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter_tts/flutter_tts.dart';
import 'package:intl/intl.dart';
import 'package:just_audio/just_audio.dart';
import 'package:queuing_system/core/api.dart';
import 'package:queuing_system/core/response_models/call_config_model.dart';
import 'package:queuing_system/core/response_models/patient_ticket_model.dart';
import 'package:queuing_system/core/response_models/prayers_widget_model.dart';
import 'package:queuing_system/core/response_models/weathers_widget_model.dart';
import 'package:queuing_system/core/response_models/widgets_config_model.dart';
import 'package:queuing_system/utils/call_by_voice.dart';
import 'package:queuing_system/utils/call_type.dart';
import 'package:queuing_system/utils/signalR_utils.dart';
import 'package:shared_preferences/shared_preferences.dart';

class AppProvider extends ChangeNotifier {
  AppProvider() {
    callInitializations();
  }

  Future<void> callInitializations() async {
    await startSignalHubConnection();
    await getInfoWidgetsDetailsFromServer();
    await getLastTimeUpdatedFromCache();
    listenNetworkConnectivity();
    listenAudioPlayerEvents();
    getTheWidgetsConfigurationsEveryMidnight();
  }

  SignalRHelper signalRHelper = SignalRHelper();

  final AudioPlayer audioPlayer = AudioPlayer();
  FlutterTts flutterTts = FlutterTts();

  CallConfig patientCallConfigurations = CallConfig();
  List<PatientTicketModel> patientTickets = [];
  List<PatientTicketModel> isQueuePatients = [];

  String currentDeviceIp = "";
  bool isCallingInProgress = false;
  bool isInternetConnectionAvailable = true;
  bool isApiCallNeeded = false;

  updateInternetConnection(bool value) {
    isInternetConnectionAvailable = value;
    notifyListeners();
  }

  Future<void> getCurrentIP() async {
    final ips = await NetworkInterface.list(type: InternetAddressType.IPv4);
    for (var interface in ips) {
      if (interface.name == "eth0") {
        for (var address in interface.addresses) {
          currentDeviceIp = address.address;
          notifyListeners();
        }
      }
      if (interface.name == "wlan0") {
        for (var address in interface.addresses) {
          currentDeviceIp = address.address;
          notifyListeners();
        }
      }
    }
  }

  WidgetsConfigModel? currentWidgetsConfigModel = WidgetsConfigModel();

  Future<void> getInfoWidgetsConfigurationsFromServer() async {
    WidgetsConfigModel? widgetsConfigModel = await API.getWidgetConfigsFromServer(currentDeviceIp, onFailure: (error) {
      log("Api call failed with this error: ${error.toString()}");
    });

    if (widgetsConfigModel != null) {
      currentWidgetsConfigModel = widgetsConfigModel;
      log("I got this data: ${widgetsConfigModel.toString()}");
      notifyListeners();
    }
  }

  WeathersWidgetModel currentWeathersWidgetModel = WeathersWidgetModel();

  Future<void> getWeatherDetailsFromServer() async {
    log("I got this data from Weather: ");

    WeathersWidgetModel? weathersWidgetModel = await API.getWeatherDetailsFromServer(
      (currentWidgetsConfigModel!.cityKey ?? "").toString(),
      onFailure: (error) => log("Api call failed with this error: ${error.toString()}"),
    );

    if (weathersWidgetModel != null) {
      currentWeathersWidgetModel = weathersWidgetModel;
      log("I got this data from Weather: ${weathersWidgetModel.toString()}");
      notifyListeners();
    }
  }

  String nextPrayerToShowWithTime = '';

  void getNextPrayerToShow() {
    log("Checking Namaz time!");
    final current = DateTime.now();
    if (DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.fajr!).isAfter(current)) {
      final namazTime = DateFormat('hh:mm a').format(DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.fajr!));
      nextPrayerToShowWithTime = "${patientCallConfigurations.fajrText} at $namazTime";
      notifyListeners();
      return;
    }
    if (DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.dhuhr!).isAfter(current)) {
      final namazTime = DateFormat('hh:mm a').format(DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.dhuhr!));
      nextPrayerToShowWithTime = "${patientCallConfigurations.dhuhrText} at $namazTime";
      notifyListeners();
      return;
    }
    if (DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.asr!).isAfter(current)) {
      final namazTime = DateFormat('hh:mm a').format(DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.asr!));
      nextPrayerToShowWithTime = "${patientCallConfigurations.asrText} at $namazTime";
      notifyListeners();
      return;
    }
    if (DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.maghrib!).isAfter(current)) {
      final namazTime = DateFormat('hh:mm a').format(DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.maghrib!));
      nextPrayerToShowWithTime = "${patientCallConfigurations.maghribText} at $namazTime";
      notifyListeners();
      return;
    }
    if (DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.isha!).isAfter(current)) {
      final namazTime = DateFormat('hh:mm a').format(DateTime.fromMillisecondsSinceEpoch(currentPrayersWidgetModel.isha!));
      nextPrayerToShowWithTime = "${patientCallConfigurations.ishaText} at $namazTime";
      notifyListeners();
      return;
    }
  }

  PrayersWidgetModel currentPrayersWidgetModel = PrayersWidgetModel();

  Future<void> getPrayerDetailsFromServer() async {
    PrayersWidgetModel? prayersWidgetModel = await API.getPrayerDetailsFromServer(
        latitude: currentWidgetsConfigModel!.projectLatitude ?? 0,
        longitude: currentWidgetsConfigModel!.projectLongitude ?? 0,
        onFailure: (error) => log("Api call failed with this error: ${error.toString()}"));

    if (prayersWidgetModel != null) {
      currentPrayersWidgetModel = prayersWidgetModel;
      log("I got this data from Prayers: ${prayersWidgetModel.toString()}");
      getNextPrayerToShow();
      notifyListeners();
    }
  }

  Future<void> getInfoWidgetsDetailsFromServer() async {
    if (currentWidgetsConfigModel == null) return;

    await getInfoWidgetsConfigurationsFromServer().whenComplete(() async {
      if (currentWidgetsConfigModel!.isWeatherReq!) {
        await getWeatherDetailsFromServer();
      }
      if (currentWidgetsConfigModel!.isPrayerTimeReq!) {
        await getPrayerDetailsFromServer();
      }
    });

    int currentDate = DateTime.now().millisecondsSinceEpoch;
    await setLastTimeUpdatedInCache(lasTimeUpdated: currentDate.toString());
  }

  Future<void> getTheWidgetsConfigurationsEveryMidnight() async {
    if (currentWidgetsConfigModel == null) return;
    if (!currentWidgetsConfigModel!.isWeatherReq! && !currentWidgetsConfigModel!.isPrayerTimeReq!) {
      return;
    }

    DateTime current = DateTime.now();
    Stream timer = Stream.periodic(const Duration(minutes: 1), (i) {
      current = current.add(const Duration(minutes: 1));
      return current;
    });

    timer.listen((data) async {
      DateTime dateTime = DateTime.parse(data.toString());

      if (currentWidgetsConfigModel!.isWeatherReq!) {
        if (dateTime.day > currentLastTimeUpdated.day) {
          await getWeatherDetailsFromServer();
        }
      }

      if (currentWidgetsConfigModel!.isPrayerTimeReq!) {
        if (dateTime.day > currentLastTimeUpdated.day) {
          await getPrayerDetailsFromServer();
        }
      }
      getNextPrayerToShow();
    });
  }

  Future<void> startSignalHubConnection() async {
    if (!signalRHelper.getConnectionState()) {
      await getCurrentIP().whenComplete(() => signalRHelper.startSignalRConnection(
            currentDeviceIp,
            onUpdateAvailable: onPingReceived,
            onConnect: onConnect,
            onConnecting: onConnecting,
            onDisconnect: onDisconnect,
          ));
    }
  }

  Future<void> callPatientsAPI() async {
    patientTickets.clear();
    API.getCallRequestInfoByClinicInfo(currentDeviceIp,
        onSuccess: (waitingCalls, isQueuePatientsCalls, callConfigs) async {
          patientCallConfigurations = callConfigs;
          if (waitingCalls.length > patientCallConfigurations.screenMaxDisplayPatients) {
            patientTickets = waitingCalls.sublist(0, patientCallConfigurations.screenMaxDisplayPatients);
          } else {
            patientTickets = waitingCalls;
          }
          isQueuePatients = isQueuePatientsCalls;
          notifyListeners();
          if (patientTickets.isNotEmpty) {
            voiceCallPatientTicket(patientTickets.first);
            updatePatientTicket(patientTickets.first);
          }
        },
        onFailure: (error) => log("Api call failed with this error: ${error.toString()}"));
  }

  onPingReceived(data) async {
    log("isCallingInProgress: $isCallingInProgress");
    log("isApiCallNeeded: $isApiCallNeeded");
    if (patientTickets.isNotEmpty) {
      if (isCallingInProgress) {
        isApiCallNeeded = true;
      } else {
        await callPatientsAPI();
      }
    } else {
      await callPatientsAPI();
    }
  }

  String getCallTypeText(PatientTicketModel ticket, CallConfig callConfig) {
    final callType = ticket.getCallType();
    switch (callType) {
      case CallType.vitalSign:
        return callConfig.vitalSignText;
      case CallType.doctor:
        return callConfig.doctorText;
      case CallType.procedure:
        return callConfig.procedureText;
      case CallType.vaccination:
        return callConfig.vaccinationText;
      case CallType.nebulization:
        return callConfig.nebulizationText;
      default:
        return callConfig.vitalSignText;
    }
  }

  CallByVoice? voiceCaller;
  PatientTicketModel currentPatient = PatientTicketModel();

  voiceCallPatientTicket(PatientTicketModel patientTicket) async {
    currentPatient = patientTicket;
    isCallingInProgress = true;
    log("Setting isCallingInProgress : $isCallingInProgress");

    if (patientTicket.isToneReq && !patientTicket.isQueue) {
      audioPlayer.setAsset("assets/tones/call_tone.mp3");
      await audioPlayer.play();
      await Future.delayed(const Duration(seconds: 3));
    }
    if (patientTicket.isVoiceReq && voiceCaller == null && !patientTicket.isQueue) {
      final postVoice = getCallTypeText(patientTicket, patientCallConfigurations);
      voiceCaller = CallByVoice(preVoice: "Ticket Number", ticketNo: patientTicket.queueNo.trim().toString(), postVoice: postVoice, lang: 'en', flutterTts: flutterTts);
      await voiceCaller!.startCalling(patientTicket.queueNo.trim().toString() != patientTicket.callNoStr.trim().toString());
      voiceCaller = null;
      if (isQueuePatients.isNotEmpty) {
        isQueuePatients.removeAt(0);
      }
    } else {
      isCallingInProgress = false;
      log("Setting isCallingInProgress : $isCallingInProgress");

      if (isApiCallNeeded) {
        log("I will start waiting!!");
        Timer(Duration(seconds: patientCallConfigurations.concurrentCallDelaySec), () async {
          await callPatientsAPI();
          log("Called the API after waiting!");
          isApiCallNeeded = false;
        });
      }
    }
  }

  Future<void> listenAudioPlayerEvents() async {
    audioPlayer.playerStateStream.listen((playerState) async {
      if (playerState.processingState == ProcessingState.completed) {
        // isCallingInProgress = false;

        if (currentPatient.isVoiceReq) return;

        if (isQueuePatients.isNotEmpty) {
          log("isQueuePatients length : ${isQueuePatients.length}");
          final length = isQueuePatients.length;
          for (int i = 0; i < length; i++) {
            await Future.delayed(Duration(seconds: patientCallConfigurations.concurrentCallDelaySec)).whenComplete(() async {
              PatientTicketModel temp = PatientTicketModel();
              if (patientTickets.isNotEmpty) {
                temp = patientTickets.elementAt(0);
                patientTickets.removeAt(0);
              }
              notifyListeners();
              isQueuePatients.removeAt(0);
              patientTickets.add(temp);
              notifyListeners();
              await voiceCallPatientTicket(patientTickets.first);
              updatePatientTicket(patientTickets.first);
            });
          }
        }
        isCallingInProgress = false;
        log("Setting isCallingInProgress : $isCallingInProgress");
        if (isApiCallNeeded) {
          log("I will start waiting!!");
          Timer(Duration(seconds: patientCallConfigurations.concurrentCallDelaySec), () async {
            await callPatientsAPI();
            log("Called the API after waiting!");
            isApiCallNeeded = false;
          });
        }
      }
    });

    flutterTts.setStartHandler(() {
      // isCallingInProgress = true;
    });

    flutterTts.setCompletionHandler(() async {
      if (isQueuePatients.isNotEmpty) {
        log("isQueuePatients length : ${isQueuePatients.length}");
        final length = isQueuePatients.length;
        for (int i = 0; i < length; i++) {
          await Future.delayed(Duration(seconds: patientCallConfigurations.concurrentCallDelaySec)).whenComplete(() async {
            PatientTicketModel temp = PatientTicketModel();
            if (patientTickets.isNotEmpty) {
              temp = patientTickets.elementAt(0);
              patientTickets.removeAt(0);
            }
            notifyListeners();
            isQueuePatients.removeAt(0);
            patientTickets.add(temp);
            notifyListeners();
            await voiceCallPatientTicket(patientTickets.first);
            updatePatientTicket(patientTickets.first);
          });
        }
      }
      isCallingInProgress = false;
      log("Setting isCallingInProgress : $isCallingInProgress");
      if (isApiCallNeeded) {
        log("I will start waiting!!");
        Timer(Duration(seconds: patientCallConfigurations.concurrentCallDelaySec), () async {
          await callPatientsAPI();
          log("Called the API after waiting!");
          isApiCallNeeded = false;
        });
      }
    });
  }

  // updatePatientTickets() {
  //   if (patientTickets.isNotEmpty) {
  //     List<Tickets> _ticketsToUpdate = patientTickets.where((t) => t.callUpdated == false).toList();
  //     API.callUpdateNotIsQueueRecordByIDAsync(currentDeviceIp, ticket: _ticketsToUpdate.first, onSuccess: (ticketsUpdated) {
  //       log("[${ticketsUpdated.length}] Tickets Updated: $ticketsUpdated");
  //     }, onFailure: (e) {
  //       log(" Tickets Update Failed with : ${e.toString()}");
  //     });
  //   }
  // }

  updatePatientTicket(PatientTicketModel patientTicket) {
    if (!patientTicket.isQueue) {
      API.callUpdateNotIsQueueRecordByIDAsync(currentDeviceIp, ticket: patientTicket, onSuccess: (ticketsUpdated) {
        log("[${patientTicket.callNoStr}] Ticket Updated: $ticketsUpdated");
      }, onFailure: (e) {
        log(" Tickets Update ${patientTicket.callNoStr} Failed with Error : ${e.toString()}");
      });
    }
  }

  onConnect() {
    log("SignalR: onConnect");
  }

  onDisconnect(exception) {
    log("SignalR: onDisconnect");
    signalRHelper.startSignalRConnection(currentDeviceIp, onUpdateAvailable: onPingReceived, onConnect: onConnect, onConnecting: onConnecting, onDisconnect: onDisconnect);
  }

  onConnecting() {
    log("SignalR: onConnecting");
  }

  listenNetworkConnectivity() async {
    Connectivity().onConnectivityChanged.listen((event) async {
      switch (event) {
        case ConnectivityResult.wifi:
          updateInternetConnection(true);
          await getCurrentIP();
          if (signalRHelper.connection == null || signalRHelper.connection!.state != ConnectionState.active) {
            signalRHelper.connection!.start();
          }
          break;
        case ConnectivityResult.none:
          updateInternetConnection(false);
          signalRHelper.closeConnection();
          break;
        case ConnectivityResult.mobile:
          break;
      }
    });
  }

  //SHARED PREFERENCE HANDLING

  DateTime currentLastTimeUpdated = DateTime.now();

  Future<String?> getLastTimeUpdatedFromCache() async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();

    if (prefs.containsKey("lastTimeUpdated")) {
      String? lastTimeUpdated = prefs.getString("lastTimeUpdated");
      currentLastTimeUpdated = DateTime.fromMillisecondsSinceEpoch(int.parse(lastTimeUpdated!));
      return lastTimeUpdated;
    } else {
      return null;
    }
  }

  Future<void> setLastTimeUpdatedInCache({required String lasTimeUpdated}) async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setString("lastTimeUpdated", lasTimeUpdated);
  }
}