import 'package:flutter/material.dart';

class WhyWidget extends StatefulWidget {
  final TextEditingController controller;
  final bool prependWhy;

  const WhyWidget({
    Key? key,
    required this.controller,
    this.prependWhy = true,
  }) : super(key: key);

  @override
  State<WhyWidget> createState() => _WhyWidget();
}

class _WhyWidget extends State<WhyWidget> {
  //final TextEditingController _controller = TextEditingController(text: "warum? ");
  final FocusNode _focusNode = FocusNode();

  @override
  void initState() {
    super.initState();
    _focusNode.addListener(() {
      if (!_focusNode.hasFocus) {
        setState(() {
          // Remove cursor when focus is lost
          widget.controller.text = widget.controller.text.replaceAll('|', '');
        });
      }
    });

    // Automatically focus the TextField and open the keyboard when the widget builds
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _focusNode.requestFocus();
    });
  }

  @override
  Widget build(BuildContext context) {
    return TextField(
      controller: widget.controller,
      focusNode: _focusNode,
      keyboardType: TextInputType.multiline,
      maxLines: null, // Allow for unlimited lines
      cursorColor: Colors.transparent, // Hide the default cursor
      style: const TextStyle(color: Colors.black, fontSize: 18),
      decoration: const InputDecoration(
        border: InputBorder.none, // Make the TextField borderless
      ),
      onChanged: (value) {
        // Ensure "why? " is always at the start
        if (widget.prependWhy && !value.startsWith('warum? ')) {
          widget.controller.text = 'warum? $value';
          widget.controller.selection = TextSelection.fromPosition(TextPosition(offset: widget.controller.text.length));
        }
      },
    );
  }

  @override
  void dispose() {
    widget.controller.dispose();
    _focusNode.dispose();
    super.dispose();
  }
}