testarossa

import 'dart:io';
import 'dart:math';
import 'dart:async';
import 'dart:collection';

class Pong {
  var TICK_TIME = const Duration(milliseconds: 17);
  var TICK_DOWN = 60 * 3;
  var WAIT_DOWN = 60;

  var BASE_SPEED = 1.5;

  var PADDLE_WIDTH = 10;
  var PADDLE_HEIGHT = 50;

  var BALL_SIZE = 10;

  var SCREEN_HEIGHT = 400;
  var SCREEN_WIDTH = 600;

  var BUMP_ACCELERATION = 0.05;

  // screen height = 400;
  // screen width = 600;
  var self = new Map();
  var bean = new Map();

  var gameTimer;
  var gameRandom;

  setupLevel () {
    var randomAngle = (gameRandom.nextBool() ? 1 : -1) * (PI / 4 + gameRandom.nextDouble() * PI / 2);

    var vx = sin(randomAngle) * BASE_SPEED;
    var vy = cos(randomAngle) * BASE_SPEED;

    bean['ball'] = {'px': 300, 'py': 200, 'vx': vx, 'vy': vy};

    bean['tickDown'] = TICK_DOWN;
  }

  gameTick(timer) {
    // do the updating
    if (bean['waitDown'] != 0) {
      bean['waitDown'] = bean['waitDown'] - 1;

      if (bean['waitDown'] == 0) {
        setupLevel();
      };
    }
    else if (bean['tickDown'] != 0) {
      bean['tickDown'] = bean['tickDown'] - 1;
    }
    else {
      var bx = bean['ball']['px'];
      var by = bean['ball']['py'];

      var vx = bean['ball']['vx'];
      var vy = bean['ball']['vy'];

      by += vy;

      if (by <= 0) {
        by *= -1;

        vy = -vy + BUMP_ACCELERATION;
      }
      else if (by >= SCREEN_HEIGHT) {
        var dy = by - SCREEN_HEIGHT;

        by = SCREEN_HEIGHT - dy;
        vy = -vy + -BUMP_ACCELERATION;
      }

      var plpx = bean['playerLeft']['px'] + PADDLE_WIDTH / 2;
      var plpy = bean['playerLeft']['py'] - PADDLE_HEIGHT / 2;

      var prpx = bean['playerRight']['px'] - PADDLE_WIDTH / 2;
      var prpy = bean['playerRight']['py'] - PADDLE_HEIGHT / 2;

      var bty = by - BALL_SIZE / 2;
      var bby = by + BALL_SIZE / 2;

      if ((vx > 0) && ((bx < prpx) && (bx + vx > prpx)) &&
          ((bby > prpy) && (bty < prpy + PADDLE_HEIGHT))) {

        vx = -vx - BUMP_ACCELERATION;
      }
      else if ((vx < 0) && ((bx > plpx) && (bx + vx < plpx)) &&
               ((bby > plpy) && (bty < plpy + PADDLE_HEIGHT))) {

        vx = -vx + BUMP_ACCELERATION;
      }

      bx += vx;

      bean['ball']['px'] = bx;
      bean['ball']['py'] = by;

      bean['ball']['vx'] = vx;
      bean['ball']['vy'] = vy;

      if (bx < 0) {
        // set a score
        bean['playerRight']['score'] += 1;

        bean['waitDown'] = WAIT_DOWN;
      }
      else if (bx > SCREEN_WIDTH) {
        // set a score;
        bean['playerLeft']['score'] += 1;

        bean['waitDown'] = WAIT_DOWN;
      }
    }

    self['socketLeft'].add(bean.toString());
    self['socketRight'].add(bean.toString());
  }

  Pong(socketLeft, socketRight) {
    gameRandom = new Random();

    self['socketLeft'] = socketLeft;
    self['socketRight'] = socketRight;

    setupLevel();

    bean['waitDown'] = 0;
    bean['playerLeft'] = {'px': 20, 'py': 200, 'score': 0};
    bean['playerRight'] = {'px': 580, 'py': 200, 'score': 0};


    socketLeft.listen((e) {
      bean['playerLeft']['py'] = double.parse(e).round();
    });
    socketRight.listen((e) {
      bean['playerRight']['py'] = double.parse(e).round();
    });

    gameTimer = new Timer.periodic(TICK_TIME, gameTick);
  }
}

main() async {
	try {
		var server = await HttpServer.bind('192.168.1.108', 4040);
    var socketList = [];

    await for (HttpRequest req in server) {
			if (req.uri.path == '/ws') {
				var socket = await WebSocketTransformer.upgrade(req);

        socketList.add(socket);

        if (socketList.length == 2) {
          var pongGame = new Pong(socketList[0], socketList[1]);

          socketList.length = 0;
        };
			}
		}
	}
  catch (e) {
		print(e);
	}
}