Game main.dart step 2

main.dart

import 'package:flutter/material.dart';
import 'package:flame/components/component.dart';
import 'package:flame/sprite.dart';
import 'package:flame/flame.dart';
import 'package:audioplayers/audioplayers.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'gameclasses.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
          primarySwatch: Colors.blue,
          textTheme: TextTheme(
            body1: TextStyle(
                fontSize: 16.0,
                color: Colors.black,
                backgroundColor: Colors.white),
          )),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  MyGame _myGame;
  bool _gameInProgress = false;
  int _level;
  SharedPreferences _prefs;
  bool _showMessages = false;
  String levelText, resultText, gameOverText, wellDoneText;

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Kill the gnats!'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            Container(
              color: Colors.white,
              height: 30.0,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  _level == null
                      ? FutureBuilder<SharedPreferences>(
                          future: SharedPreferences.getInstance(),
                          builder: (BuildContext context,
                              AsyncSnapshot<SharedPreferences> snapshot) {
                            if (snapshot.hasData) {
                              _prefs = snapshot.data;
                              _level = _prefs.getInt('level') ?? 1;
                              return Text(
                                  'Your current level is $_level (${2 * _level + 2} gnats)');
                            } else
                              return Text('wait');
                          })
                      : Text(
                          'Your current level is $_level (${2 * _level + 2} gnats)'),
                  FlatButton(
                    color: Colors.white,
                    textColor: Colors.white,
                    padding: EdgeInsets.all(0.0),
                    onPressed: () {
                      _level = 1;
                      _prefs.setInt('level', 1);
                      setState(() {});
                    },
                    child: ClipRRect(
                      borderRadius: BorderRadius.all(Radius.circular(5.0)),
                      child: Text(
                        " Reset ",
                        style: TextStyle(
                            fontSize: 18.0, backgroundColor: Colors.red[400]),
                      ),
                    ),
                  )
                ],
              ),
            ),
            Expanded(
                child: Stack(
              children: [
                Container(
                  color: Colors.lightBlue[100],
                  child: _myGame == null
                      ? Text('Tap the button to let in the gnats!',
                          style: TextStyle(
                            color: Colors.red,
                            fontWeight: FontWeight.bold,
                          ))
                      : _myGame.widget,
                ),
                _showMessages
                    ? Center(
                        child: Column(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                          Text(
                            gameOverText,
                            style: TextStyle(
                                fontSize: 50.0,
                                color: Colors.red,
                                fontStyle: FontStyle.italic),
                          ),
                          Text(resultText), // You killed 3 gnats in 5 seconds
                          Text(levelText), // You advance to level 4 or You stay on level 3
                        ],
                      ))
                    : Container(),
              ],
            )),
            Container(
              color: Colors.lightGreen,
              height: 100.0, // For largeBanner ads
            )
          ],
        ),
      ),
      floatingActionButton: Padding(
        padding: const EdgeInsets.only(bottom: 100.0),
        child: FloatingActionButton(
          onPressed: () => _newGame(),
          child: Icon(Icons.add),
        ),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  void _newGame() async {
    if (_gameInProgress) return; // Only allow one game at a time
    _gameInProgress = true;
    AudioPlayer _audioPlayer =
        await Flame.audio.playLongAudio('188708__zywx__flying-mosquito.wav');
    _myGame = new MyGame(); // This kills the remaining gnats but not the timer
    MyGame.kills = 0;
    _level = _prefs.getInt('level') ?? 1;
    MyGame.target = 2 * _level + 2;
    Sprite sprite = await Sprite.loadSprite('gnat.png');
    for (int i = 0; i < MyGame.target; i++) {
      SpriteComponent gnat = Gnat(sprite);
      _myGame.add(gnat);
    }
    setState(() {
      _showMessages = false;
    });

    int seconds;
    for (seconds = 0; seconds < 10; seconds++) {
      print('seconds $seconds');
      await Future.delayed(const Duration(seconds: 1), () {});
      if (MyGame.kills == MyGame.target) break;
    }
    _gameInProgress = false;
    if (MyGame.kills == MyGame.target) {
      _level++;
      _prefs.setInt('level', _level);
      gameOverText = 'Well Done';
      resultText = 'You killed ${MyGame.target} gnats in $seconds seconds';
      levelText = 'You advance to level $_level.';
      Flame.audio.play('397354__plasterbrain__tada-fanfare-f.flac');
      _audioPlayer.stop(); // Stop the background sound
    } else {
      gameOverText = 'Game Over!';
      resultText = resultText = 'You only killed ${MyGame.kills} gnats.';
      levelText = 'You stay on level $_level.';
      Flame.audio.play('350984__cabled-mess__lose-c-03.wav');
    }
    setState(() {
      _showMessages = true;
    });
  }
}