doctor_app_flutter/lib/screens/medicine/medicine_search_screen.dart

import 'dart:math';

import 'package:autocomplete_textfield/autocomplete_textfield.dart';
import 'package:doctor_app_flutter/config/size_config.dart';
import 'package:doctor_app_flutter/core/model/get_medication_response_model.dart';
import 'package:doctor_app_flutter/core/viewModel/medicine_view_model.dart';
import 'package:doctor_app_flutter/icons_app/doctor_app_icons.dart';
import 'package:doctor_app_flutter/screens/base/base_view.dart';
import 'package:doctor_app_flutter/screens/medicine/pharmacies_list_screen.dart';
import 'package:doctor_app_flutter/util/dr_app_shared_pref.dart';
import 'package:doctor_app_flutter/util/dr_app_toast_msg.dart';
import 'package:doctor_app_flutter/util/helpers.dart';
import 'package:doctor_app_flutter/util/translations_delegate_base.dart';
import 'package:doctor_app_flutter/widgets/medicine/medicine_item_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/Text.dart';
import 'package:doctor_app_flutter/widgets/shared/app_buttons_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/app_scaffold_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/app_texts_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/loader/gif_loader_dialog_utils.dart';
import 'package:eva_icons_flutter/eva_icons_flutter.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:speech_to_text/speech_recognition_error.dart';
import 'package:speech_to_text/speech_recognition_result.dart';
import 'package:speech_to_text/speech_to_text.dart';

import '../../util/extenstions.dart';

DrAppSharedPreferances sharedPref = DrAppSharedPreferances();

class MedicineSearchScreen extends StatefulWidget with DrAppToastMsg {
  MedicineSearchScreen({this.changeLoadingStata});

  final Function changeLoadingStata;

  @override
  _MedicineSearchState createState() => _MedicineSearchState();
}

class _MedicineSearchState extends State<MedicineSearchScreen> {
  var data;
  final myController = TextEditingController();
  Helpers helpers = new Helpers();
  bool _hasSpeech = false;
  String _currentLocaleId = "";
  bool _isInit = true;
  final SpeechToText speech = SpeechToText();
  String lastStatus = '';
  GetMedicationResponseModel _selectedMedication;
  GlobalKey key =
      new GlobalKey<AutoCompleteTextFieldState<GetMedicationResponseModel>>();

  // String lastWords;
  List<LocaleName> _localeNames = [];
  String lastError;
  double level = 0.0;
  double minSoundLevel = 50000;
  double maxSoundLevel = -50000;
  String reconizedWord;

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

  void requestPermissions() async {
    Map<Permission, PermissionStatus> statuses = await [
      Permission.microphone,
    ].request();
  }

  Future<void> initSpeechState() async {
    bool hasSpeech = await speech.initialize(
        onError: errorListener, onStatus: statusListener);
    // if (hasSpeech) {
    //   _localeNames = await speech.locales();

    //   var systemLocale = await speech.systemLocale();
    _currentLocaleId = TranslationBase.of(context).locale.languageCode == 'en'
        ? 'en-GB'
        : 'ar-SA'; // systemLocale.localeId;
    // }

    if (!mounted) return;

    setState(() {
      _hasSpeech = hasSpeech;
    });
  }

  InputDecoration textFieldSelectorDecoration(String hintText,
      String selectedText, bool isDropDown,
      {IconData icon}) {
    return InputDecoration(
      focusedBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Color(0xFFCCCCCC), width: 2.0),
        borderRadius: BorderRadius.circular(8),
      ),
      enabledBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Color(0xFFCCCCCC), width: 2.0),
        borderRadius: BorderRadius.circular(8),
      ),
      disabledBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Color(0xFFCCCCCC), width: 2.0),
        borderRadius: BorderRadius.circular(8),
      ),
      hintText: selectedText != null ? selectedText : hintText,
      suffixIcon: isDropDown ? Icon(icon ?? Icons.arrow_drop_down) : null,
      hintStyle: TextStyle(
        fontSize: 14,
        color: Colors.grey.shade600,
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return BaseView<MedicineViewModel>(
      onModelReady: (model) async {
        if(model.allMedicationList.length == 0)
        await model.getMedicationList();
      },
      builder: (_, model, w) =>
          AppScaffold(
            baseViewModel: model,
            appBarTitle: TranslationBase
                .of(context)
                .searchMedicine,
            body: SingleChildScrollView(
              child: FractionallySizedBox(
                widthFactor: 0.97,
                child: SingleChildScrollView(
                  child: Column(
                    children: <Widget>[
                      Column(
                        children: <Widget>[
                          Container(
                            child: Icon(
                              DoctorApp.medicine_search,
                              size: 100,
                              color: Colors.black,
                            ),
                            margin: EdgeInsets.only(top: 50),
                          ),
                          Padding(
                            padding: const EdgeInsets.only(top: 12.0),
                            child: AppText(
                              TranslationBase.of(context).type.toUpperCase(),
                              fontWeight: FontWeight.bold,
                              fontSize: SizeConfig.heightMultiplier * 2.5,
                            ),
                          ),
                          Padding(
                            padding: const EdgeInsets.only(top: 5.0),
                            child: AppText(
                              TranslationBase.of(context).searchMedicineImageCaption,
                              fontSize: SizeConfig.heightMultiplier * 2,
                            ),
                          )
                        ],
                      ),
                      SizedBox(
                        height: 15,
                      ),
                      FractionallySizedBox(
                        widthFactor: 0.9,
                        child: Column(
                          children: <Widget>[
                            Container(
                              height: MediaQuery
                                  .of(context)
                                  .size
                                  .height * 0.070,
                              child: InkWell(
                                onTap: model.allMedicationList != null
                                    ? () {
                                  setState(() {
                                    _selectedMedication = null;
                                  });
                                }
                                    : null,
                                child: _selectedMedication == null
                                    ? AutoCompleteTextField<
                                    GetMedicationResponseModel>(
                                  decoration: textFieldSelectorDecoration(
                                      TranslationBase
                                          .of(context)
                                          .searchMedicineNameHere,
                                      _selectedMedication != null
                                          ? _selectedMedication.genericName
                                          : null,
                                      true,
                                      icon: EvaIcons.search),
                                  itemSubmitted: (item) =>
                                      setState(
                                              () => _selectedMedication = item),
                                  key: key,
                                  suggestions: model.allMedicationList,
                                  itemBuilder: (context, suggestion) =>
                                  new Padding(
                                      child: Texts(suggestion.description + '/' +
                                          suggestion.genericName),
                                      padding: EdgeInsets.all(8.0)),
                                  itemSorter: (a, b) => 1,
                                  itemFilter: (suggestion, input) =>
                                  suggestion.genericName
                                      .toLowerCase()
                                      .startsWith(input.toLowerCase()) ||
                                      suggestion.description
                                          .toLowerCase()
                                          .startsWith(input.toLowerCase()) ||
                                      suggestion.keywords
                                          .toLowerCase()
                                          .startsWith(input.toLowerCase()),
                                )
                                    : TextField(
                                  minLines: 2,
                                  maxLines: 2,
                                  decoration: textFieldSelectorDecoration(
                                      TranslationBase
                                          .of(context)
                                          .searchMedicineNameHere,
                                      _selectedMedication != null
                                          ? _selectedMedication.description +
                                          (' (${_selectedMedication.genericName} )')
                                          : null,
                                      true,
                                      icon: EvaIcons.search),
                                  enabled: false,
                                ),
                              ),
                            ),
                            SizedBox(
                              height: 15,
                            ),
                            Container(
                              child: Wrap(
                                alignment: WrapAlignment.center,
                                children: <Widget>[
                                  // TODO change it secondary button and add loading
                                  AppButton(
                                    title: TranslationBase.of(context).search,
                                    onPressed: () async {
                                      await searchMedicine(context, model);
                                    },
                                  ),
                                ],
                              ),
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),),);
  }

  searchMedicine(context, MedicineViewModel model) async {
    FocusScope.of(context).unfocus();
    if (_selectedMedication.isNullOrEmpty()) {
      helpers.showErrorToast(TranslationBase
          .of(context)
          .typeMedicineName);
      //"Type Medicine Name")
      return;
    } else
    if (_selectedMedication.description.length < 3) {
      helpers.showErrorToast(TranslationBase
          .of(context)
          .moreThan3Letter);
      return;
    }

    // GifLoaderDialogUtils.showMyDialog(context);
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) =>
            PharmaciesListScreen(
                itemID:_selectedMedication.itemId,
              selectedMedication: _selectedMedication,
                ),
      ),
    );
    // await model.getMedicineItem(_selectedMedication.description);
    // GifLoaderDialogUtils.hideDialog(context);

  }

  startVoiceSearch() {
    // lastWords = "";
    lastError = "";
    speech.listen(
        onResult: resultListener,
        listenFor: Duration(seconds: 10),
        localeId: _currentLocaleId,
        onSoundLevelChange: soundLevelListener,
        cancelOnError: true,
        partialResults: true,
        onDevice: true,
        listenMode: ListenMode.confirmation);
    setState(() {});
  }

  void resultListener(SpeechRecognitionResult result) {
    setState(() {
      // lastWords = "${result.recognizedWords} - ${result.finalResult}";
      reconizedWord = result.recognizedWords;
      lastStatus = '';
      myController.text = reconizedWord;
      Future.delayed(const Duration(seconds: 2), () {
        // searchMedicine(context);
      });
    });
  }

  void errorListener(SpeechRecognitionError error) {
    // print("Received error status: $error, listening: ${speech.isListening}");
    setState(() {
      lastError = "${error.errorMsg} - ${error.permanent}";
    });
  }

  void statusListener(String status) {
    // print(
    // "Received listener status: $status, listening: ${speech.isListening}");
    setState(() {
      lastStatus = status;
    });
  }

  // _switchLang(selectedVal) {
  //   setState(() {
  //     _currentLocaleId = selectedVal;
  //   });
  //   print(selectedVal);
  // }

  void soundLevelListener(double level) {
    minSoundLevel = min(minSoundLevel, level);
    maxSoundLevel = max(maxSoundLevel, level);
    // print("sound level $level: $minSoundLevel - $maxSoundLevel ");
    setState(() {
      this.level = level;
    });
  }
}