import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    super.key,
  });

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

class _MyHomePageState extends State<MyHomePage> with DeltaTextInputClient {
  TextInputConnection? _imeConnection;

  @override
  void initState() {
    super.initState();
    _attachToIme();
  }

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

  @override
  void updateEditingValueWithDeltas(List<TextEditingDelta> textEditingDeltas) {}

  void _attachToIme() {
    if (_imeConnection != null && _imeConnection!.attached) {
      return;
    }

    const config = TextInputConfiguration(
      enableDeltaModel: false,
      inputType: TextInputType.multiline,
      inputAction: TextInputAction.newline,
    );
    _imeConnection = TextInput.attach(this, config);
    _imeConnection!.setEditingState(const TextEditingValue());
    _imeConnection!.show();
  }

  void _detachFromIme() {
    _imeConnection?.close();
    _imeConnection = null;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Focus(
          autofocus: true,
          onKeyEvent: (node, event) {
            if (event is KeyDownEvent) {
              if (event.logicalKey == LogicalKeyboardKey.enter) {
                print('Enter pressed');
                return KeyEventResult.handled;
              }
            }
            return KeyEventResult.ignored;
          },
          child: const SizedBox()),
    );
  }

  @override
  void connectionClosed() {}

  @override
  AutofillScope? get currentAutofillScope => null;

  @override
  TextEditingValue? get currentTextEditingValue => TextEditingValue.empty;

  @override
  void didChangeInputControl(
      TextInputControl? oldControl, TextInputControl? newControl) {}

  @override
  void insertContent(KeyboardInsertedContent content) {}

  @override
  void insertTextPlaceholder(Size size) {}

  @override
  void performAction(TextInputAction action) {
    print('Action $action');
  }

  @override
  void performPrivateCommand(String action, Map<String, dynamic> data) {}

  @override
  void performSelector(String selectorName) {}

  @override
  void removeTextPlaceholder() {}

  @override
  void showAutocorrectionPromptRect(int start, int end) {}

  @override
  void showToolbar() {}

  @override
  void updateEditingValue(TextEditingValue value) {}

  @override
  void updateFloatingCursor(RawFloatingCursorPoint point) {}
}