import akka.actor.{Actor, ActorRef, ActorSystem, PoisonPill, Props}
class Player() extends Actor {
  private var n = 3
  override def receive: Receive = {
    case Player.Ping(message) => {
      println(message)
      sender ! Player.Pong()
    }
    case Player.Pong(message) => {
      println(message)
      n -= 1
      if (n <= 0) {
        sender ! PoisonPill
        self ! PoisonPill
      }
      else
        sender() ! Player.Ping()
    }
  }
}
object Player {
  def props = Props(classOf[Player]) //obiekt konf przy tworz aktora
  case class Ping(msg: String = "ping")
  case class Pong(msg: String = "pong")
}

object Main extends App {
  val ourSystem = ActorSystem("MySystem")
  val pinger: ActorRef = ourSystem.actorOf(Player.props)
  val ponger: ActorRef = ourSystem.actorOf(Player.props)
  ponger.tell(Player.Ping(),pinger)
  Thread.sleep(1000)
  ourSystem.terminate()
}