import 'package:flutter/material.dart';
import 'package:dart_core_sdk/handlingunit.pb.dart';
import 'package:dart_core_sdk/handlingunitQuery.pbgrpc.dart';
import 'package:dart_core_sdk/shared.pb.dart';
import 'package:sampleapp/widgets/components/reflex_button.dart';
import 'package:barcode_scan2/barcode_scan2.dart';
import 'package:sampleapp/widgets/components/reflex_circular_progress.dart';
import 'package:sampleapp/widgets/components/reflex_text_form_field.dart';
import '../../locator.dart';
import '../components/reflex_alert.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

class ScanBarcode extends StatefulWidget {
  final String projectID;

  final void Function(String refID, Handlingunit? handlingUnitResult) onBarcodeScanned;

  const ScanBarcode(
      {super.key, required this.projectID, required this.onBarcodeScanned});

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

class _ScanBarcodeState extends State<ScanBarcode> {
  final _handlingUnitIDController = TextEditingController();

  bool _isButtonDisabled() {
    return _handlingUnitIDController.text.isEmpty;
  }

  void _onHandlingUnitLookup() async {
    showDialog(
        barrierDismissible: false,
        context: context,
        builder: (context) => const Center(child: ReflexCircularProgress()));
    await locator
        .get<HandlingunitQueryClient>()
        .getByIds(HandlingunitByIdQuery(
          header: QueryProjectHeader(
            projectID: widget.projectID,
          ),
          iDs: [EntityID(
            refID: _handlingUnitIDController.text,
          )],
        ))
        .then((res) => {
          widget.onBarcodeScanned(_handlingUnitIDController.text, res.objects.isNotEmpty ? res.objects.first : null),
          Navigator.of(context, rootNavigator: true).pop()
        })
        .catchError((e) => {
          Navigator.of(context, rootNavigator: true).pop(),
          showDialog(
              context: context,
              builder: (context) => AlertDialog(
                  title: Text(AppLocalizations.of(context)!.error),
                  content: Text(e.toString()),
                  actions: [
                    TextButton(
                        onPressed: () {
                          Navigator.of(context).pop();
                        },
                        child: Text(AppLocalizations.of(context)!.ok))
                  ],
            ))
        });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Padding(
            padding: const EdgeInsets.all(15.0),
            child: Form(
                child: Column(
              children: [
                ReflexTextFormField(
                  controller: _handlingUnitIDController,
                  label: AppLocalizations.of(context)!.handlingUnitIdentifier,
                  onChanged: (v) {
                    setState(() {});
                  },
                ),
                // Separator
                const SizedBox(height: 20),
                Text(
                  AppLocalizations.of(context)!.or,
                  style: const TextStyle(
                    fontWeight: FontWeight.bold,
                  ),
                ),
                const SizedBox(height: 20),
                // Scan button
                ReflexButton(
                    text: AppLocalizations.of(context)!.scanBarcode,
                    isFullWidth: true,
                    onPressed: () async {
                      var result = await BarcodeScanner.scan();
                      if (result.rawContent.isNotEmpty) {
                        setState(() {
                          _handlingUnitIDController.text = result.rawContent.trim();
                        });
                        _onHandlingUnitLookup();
                      }
                    }),
                ReflexAlert(
                  text:
                      AppLocalizations.of(context)!.selectHandlingUnit,
                  icon: Icons.info_outline_rounded,
                ),
                const SizedBox(height: 20),
                Align(
                    alignment: Alignment.centerRight,
                    child: ReflexButton(
                      text: AppLocalizations.of(context)!.search,
                      onPressed:
                          _isButtonDisabled() ? null : _onHandlingUnitLookup,
                    ))
              ],
            ))));
  }
}