import 'dart:async';

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData.light(),
      debugShowCheckedModeBanner: false,
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

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

class _MyHomePageState extends State<MyHomePage> {

  int _counter = 0;
  int timerTime = 60;
  int i = 60;
  void _incrementCounter() {
    setState(() {
      var timer = new Timer.periodic(Duration(seconds: 1), callback);{

      };
    });
  }

  int t;
  void callback(Timer timer) {

    if(i == _counter){
      print("End");
    } else {
      print("time is " + t.toString());
      t = i--;
    }

  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Center(child: Text("Hedgehog Timer", textAlign: TextAlign.center,style: TextStyle(color: Colors.black)) ),
        backgroundColor: Colors.white,

        elevation: 0.2,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              t.toString(),
              style: TextStyle(fontSize: 150),
            ),
          ],
        ),
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
      floatingActionButton: FloatingActionButton.extended(
        onPressed: _incrementCounter,
        elevation: 4.0,
        icon: Icon(Icons.play_arrow),
        label: Text("Start The Hedgehog Timer"),
      ),
      bottomNavigationBar: BottomAppBar(
        child: new Row(
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: <Widget>[
            IconButton(
              icon: Icon(Icons.menu),
              onPressed: () {},
            ),
            IconButton(
              icon: Icon(Icons.more_vert),
              onPressed: () {},
            )
          ],
        ),
      ),// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}