import 'dart:async';
import 'package:flutter/material.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 {
  late FocusNode _focusNode;
  Timer? _debounceTimer; // Global debounce timer

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    _focusNode = FocusNode(
      canRequestFocus: true,
      skipTraversal: true,
    );
    _forceFocus();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    _focusNode.dispose();
    _debounceTimer?.cancel(); // Timer'ı temizle
    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;
      _focusNode.requestFocus();
    });
  }

  KeyEventResult _handleKeyEvent(FocusNode node, KeyEvent event) {
    // Eğer debounce aktifse, işlemi iptal et
    if (_debounceTimer?.isActive ?? false) {
      return KeyEventResult.handled;
    }

    // Debounce başlat
    _debounceTimer = Timer(const Duration(milliseconds: 300), () {
      _debounceTimer = null; // Zamanlayıcı sıfırla
    });

    if (widget.shouldBlockKey(event)) {
      return KeyEventResult.handled;
    }
    return KeyEventResult.ignored;
  }

  @override
  Widget build(BuildContext context) {
    return Focus(
      focusNode: _focusNode,
      autofocus: true,
      canRequestFocus: true,
      skipTraversal: true,
      onKeyEvent: _handleKeyEvent, // Debounced key handler
      child: widget.child,
    );
  }
}