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

class TusYayilmasiEngelleWidget extends StatefulWidget {
  final Widget child;
  final bool Function(KeyEvent event) shouldBlockKey;

  const TusYayilmasiEngelleWidget({
    super.key,
    required this.child,
    required this.shouldBlockKey,
  });

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

class _TusYayilmasiEngelleWidgetState extends State<TusYayilmasiEngelleWidget> with WidgetsBindingObserver {
  final FocusNode _focusNode = FocusNode();
  bool _isFocused = false;
  LogicalKeyboardKey? _lastKeyPressed;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    _forceFocus();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _focusNode.dispose();
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      Future.delayed(const Duration(milliseconds: 0), _forceFocus);
    }
  }

  void _forceFocus() {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (!mounted || _focusNode.hasFocus) return;
      FocusScope.of(context).unfocus();
      _focusNode.requestFocus();
      _isFocused = true;
    });
  }

  KeyEventResult _handleKeyEvent(FocusNode node, KeyEvent event) {
    if (event is! KeyDownEvent) return KeyEventResult.ignored;

    LogicalKeyboardKey key = event.logicalKey;

    // Aynı tuşun tekrar basılması önleniyor
    if (_lastKeyPressed == key) {
      return KeyEventResult.handled;
    }
    _lastKeyPressed = key;

    // Geri tuşu veya escape tamamen engelleniyor
    if (key == LogicalKeyboardKey.goBack || key == LogicalKeyboardKey.escape) {
      return KeyEventResult.handled;
    }

    // Kullanıcının engellemek istediği tuşlar
    if (widget.shouldBlockKey(event)) {
      return KeyEventResult.handled;
    }

    return KeyEventResult.ignored;
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: _forceFocus,
      child: Focus(
        focusNode: _focusNode,
        autofocus: true,
        canRequestFocus: true,
        skipTraversal: true,
        onFocusChange: (value) => _isFocused = value,
        onKeyEvent: _handleKeyEvent,
        child: widget.child,
      ),
    );
  }
}