mohemm-flutter-app/lib/home/home_screen.dart

import 'dart:async';
import 'dart:io';
import 'package:connectivity/connectivity.dart';
import 'package:flutter/material.dart';
import 'package:queuing_system/core/api.dart';
import 'package:queuing_system/core/base/app_scaffold_widget.dart';
import 'package:queuing_system/core/base/base_app_client.dart';
import 'package:queuing_system/core/config/config.dart';
import 'package:queuing_system/core/config/size_config.dart';
import 'package:queuing_system/core/response_model/patient_call.dart';
import 'package:queuing_system/header/app_header.dart';
import 'package:queuing_system/home/home_screen_components.dart';
import 'package:queuing_system/home/que_item_list.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:queuing_system/utils/utils.dart';
import 'package:queuing_system/widget/data_display/app_texts_widget.dart';
import 'package:signalr_core/signalr_core.dart';
import 'package:text_to_speech/text_to_speech.dart';
import 'first_column.dart';


var DEVICE_IP = "10.20.20.19"; // Testing IP
// var DEVICE_IP = "10.70.249.21"; // (Make sure by Haroon before use it) Production IP

class MyHomePage extends StatefulWidget {
  String title = "MyHomePage";

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  SignalRHelper signalRHelper = SignalRHelper();

  final _tts = TextToSpeech();

  List<Tickets> waitings = [];
  List<Tickets> currents = [];

  @override
  void dispose() {
    super.dispose();
  }


  @override
  void initState() {
    listenNetworkConnectivity();

    if (!signalRHelper.getConnectionState()) {
      signalRHelper.startSignalRConnection(
          DEVICE_IP,
          onUpdateAvailable: onUpdateAvailable,
          onConnect: onConnect,
          onConnecting: onConnecting,
          onDisconnect: onDisconnect
      );
    }

    _tts.setLanguage("en");
    _tts.setRate(0.7);

    // _tts.getVoiceByLang('en').then((value){
    //
    // })
    _tts.getVoice().then((value){
      _tts.setVoice(value[2]);
    });

    super.initState();
  }

  @override
  Widget build(BuildContext context) {

    return AppScaffold(
      appBar: AppHeader(),
      body: content(),
      bottomNavigationBar: Container(
        color: Colors.grey.withOpacity(0.1),
        height: Utils.getHeight(),
        width: double.infinity,
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            const SizedBox(width: 20),
            AppText(
              "Powered By",
              fontSize: SizeConfig.getWidthMultiplier() * 2.6,
              fontFamily: 'Poppins-Medium.ttf',
            ),
            const SizedBox(width: 20),
            Image.asset(
              "assets/images/cloud_logo.png",
              height: SizeConfig.getHeightMultiplier() * 4,
            ),
            const SizedBox(width: 20),
          ],
        ),
      ),
    );
  }

  Widget content(){
    // waitings = waitings.sublist(0,3);
    voiceCall();

    if(waitings.isEmpty) {
      // No Patient in Queue
      return noPatientInQueue();

    }else if(waitings.length > 4){
      // Return Content With Side List
      return priorityTicketsWithSideList(waitings);

    }else{
      // Return Content In Center Aligned
      return priorityTickets(waitings);

    }
  }


  CallByVoice voiceCaller;
  voiceCall() async{
    if(waitings.isNotEmpty && voiceCaller == null){
      final postVoice = waitings.first.getCallType().audio('en');
      voiceCaller = CallByVoice(waitings.first.callNo.toString(), preVoice: 'ticket_number.mp3', postVoice: postVoice, lang: 'en');
      await voiceCaller.start();
      voiceCaller = null;
    }
  }

  onUpdateAvailable(data) async{
    API.GetCallRequestInfoByClinincInfo(
        DEVICE_IP,
        onSuccess: (waitingCalls, currentInClinic){

          setState(() {
            waitings = waitingCalls;
            currents = currentInClinic;
          });

          print("\n\n");
          print("--------------------");
          print("Current: $currentInClinic");
          print("Waiting: $waitingCalls");
          print("--------------------");
          print("\n\n");

          updateTickets();

        }, onFailure: (error){

    });
  }


  updateTickets(){
    List<Tickets> _ticketsToUpdate = waitings.where((t) => t.call_updated == false);
    API.Call_UpdateNotIsQueueRecordByIDAsync(DEVICE_IP, tickets: _ticketsToUpdate, onSuccess: (tickets_updated){
      print("[${tickets_updated.length}] Tickets Updated: $tickets_updated");
    }, onFailure: (e){

    });
  }


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

  onDisconnect(exception){
    print("SignalR: onDisconnect");
  }

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

  listenNetworkConnectivity() async{
    Connectivity().onConnectivityChanged.listen((event) {
      switch (event) {
        case ConnectivityResult.wifi:
          signalRHelper.connection.start();
          break;
        case ConnectivityResult.none:
          signalRHelper.closeConnection(context);
          break;
      }
    });
  }
}