doctor_app_flutter/lib/screens/medicine/medicine_search_screen.dart

import 'dart:math';

import 'package:doctor_app_flutter/config/config.dart';
import 'package:doctor_app_flutter/config/size_config.dart';
import 'package:doctor_app_flutter/icons_app/doctor_app_icons.dart';
import 'package:doctor_app_flutter/providers/medicine_provider.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/app_buttons_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/app_scaffold_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/app_text_form_field.dart';
import 'package:doctor_app_flutter/widgets/shared/app_texts_widget.dart';
import 'package:doctor_app_flutter/widgets/shared/dr_app_circular_progress_Indeicator.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:provider/provider.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;
  MedicineProvider _medicineProvider;
  String _currentLocaleId = "";
  bool _isInit = true;
  final SpeechToText speech = SpeechToText();
  String lastStatus = '';

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

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    if (_isInit) {
      _medicineProvider = Provider.of<MedicineProvider>(context);
      // requestPermissions();
      // initSpeechState();
    }
    _isInit = false;
  }

  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;
    });
  }

  @override
  Widget build(BuildContext context) {
    return AppScaffold(
        appBarTitle: TranslationBase.of(context).searchMedicine,
        body: 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(
                        child: AppTextFormField(
                            hintText: TranslationBase.of(context)
                                .searchMedicineNameHere,
                            controller: myController,
                            onSaved: (value) {},
                            onFieldSubmitted: (value) {
                              searchMedicine(context);
                            },
                            textInputAction: TextInputAction.search,
                            // TODO return it back when it needed
                            // prefix: IconButton(
                            //     icon: Icon(Icons.mic),
                            //     color:
                            //         lastStatus == 'listening' ? Colors.red : Colors.grey,
                            //     onPressed: () {
                            //       myController.text = '';
                            //       setState(() {
                            //         lastStatus = 'listening';
                            //       });
                            //
                            //       startVoiceSearch();
                            //     }),
                            inputFormatter: ONLY_LETTERS),
                      ),
                      SizedBox(
                        height: 15,
                      ),
                      Container(
                        child: Wrap(
                          alignment: WrapAlignment.center,
                          children: <Widget>[
                            AppButton(
                              title: TranslationBase.of(context).search,
                              onPressed: () {
                                searchMedicine(context);
                              },
                            ),
                          ],
                        ),
                      ),
                      Container(
                        margin: EdgeInsets.only(
                            left: SizeConfig.heightMultiplier * 2),
                        child: Row(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: <Widget>[
                            AppText(
                              TranslationBase.of(context).youCanFind +
                                  _medicineProvider.pharmacyItemsList.length
                                      .toString() +
                                  " " +
                                  TranslationBase.of(context).itemsInSearch,
                              fontWeight: FontWeight.bold,
                            ),
                          ],
                        ),
                      ),
                      Container(
                        height: MediaQuery.of(context).size.height * 0.35,
                        child: Container(
                          child: !_medicineProvider.isFinished
                              ? DrAppCircularProgressIndeicator()
                              : _medicineProvider.hasError
                                  ? Center(
                                      child: Text(
                                        _medicineProvider.errorMsg,
                                        style: TextStyle(
                                            color:
                                                Theme.of(context).errorColor),
                                      ),
                                    )
                                  : ListView.builder(
                                      scrollDirection: Axis.vertical,
                                      shrinkWrap: true,
                                      itemCount:
                                          _medicineProvider.pharmacyItemsList ==
                                                  null
                                              ? 0
                                              : _medicineProvider
                                                  .pharmacyItemsList.length,
                                      itemBuilder:
                                          (BuildContext context, int index) {
                                        return InkWell(
                                          child: MedicineItemWidget(
                                            label: _medicineProvider
                                                    .pharmacyItemsList[index]
                                                ["ItemDescription"],
                                            url: _medicineProvider
                                                    .pharmacyItemsList[index]
                                                ["ImageSRCUrl"],
                                          ),
                                          onTap: () {
                                            Navigator.push(
                                              context,
                                              MaterialPageRoute(
                                                builder: (context) =>
                                                    PharmaciesListScreen(
                                                        itemID: _medicineProvider
                                                                .pharmacyItemsList[
                                                            index]["ItemID"],
                                                        url: _medicineProvider
                                                                .pharmacyItemsList[
                                                            index]["ImageSRCUrl"]),
                                              ),
                                            );
                                          },
                                        );
                                      },
                                    ),
                        ),
                      ),
                    ],
                  ),
                ),
              ],
            ),
          ),
        ));
  }

  searchMedicine(context) {
    FocusScope.of(context).unfocus();
    if (myController.text.isNullOrEmpty()) {
      _medicineProvider.clearPharmacyItemsList();
      helpers.showErrorToast(TranslationBase.of(context).typeMedicineName) ;
      //"Type Medicine Name")
      return;
    }
    if (myController.text.length < 3) {
      _medicineProvider.clearPharmacyItemsList();
      helpers.showErrorToast(TranslationBase.of(context).moreThan3Letter);
      return;
    }
    _medicineProvider.getMedicineItem(myController.text);
  }

  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;
    });
  }
}