import 'dart:math';

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

class NumberDisplay extends StatelessWidget {
  NumberDisplay({this.value: ''});

  final String value;

  GlobalKey stickyKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: Padding(
          padding: const EdgeInsets.only(left: 20.0, right: 20.0, top: 20.0),
          child: Container(
            key: stickyKey,
            alignment: Alignment.topLeft,
            child: AutoSizeText(
              value,
              style: TextStyle(fontSize: 40),
            ),
            // child: AnimatedDefaultTextStyle(
            //   duration: const Duration(milliseconds: 200),
            //   style: TextStyle(
            //     fontSize: fontSizeCalc(value: value),
            //     fontWeight: FontWeight.bold,
            //     color: Colors.black,
            //   ),
            //   child: Text(
            //     value,
            //   ),
            // ),
          )),
    );
  }

  double fontSizeCalc({String value = "    ", context}) {
    const double result = 40.0;
    try {
      double width = MediaQuery.of(context).size.width;
      double height = MediaQuery.of(context).size.height;
      double global = width * height / 2;
      double scale = (global / value.length);
      final pixelOfLetter = sqrt(scale);
      final pixelOfLetterP = pixelOfLetter - (pixelOfLetter * 7) / 100;
      if (pixelOfLetterP > result) {
        return result;
      }
      return pixelOfLetterP;
    } catch (e) {
      return result;
    }
  }
}