import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.Condition;

public class BrusMaskin {
    private final Lock brusLaas = new ReentrantLock();
    private final Condition harBrusTilSalgs = brusLaas.newCondition();
    private final Condition trengerPaafyll = brusLaas.newCondition();
    private final int kapasitet;
    private int brusTeller;

    public BrusMaskin(int kapasitet) {
        this.kapasitet = kapasitet;
        brusTeller = 0;
    }

    public void kjopBrus() {
        brusLaas.lock();
        try {
            while(brusTeller == 0) {
                harBrusTilSalgs.await();
            }
            System.out.println("Kjoper brus, antall igjen er " + --brusTeller);
            if (brusTeller == 0) {
                System.out.println("Maskinen trenger paafyll");
                trengerPaafyll.signal();
            }
        } catch (InterruptedException e) {
            System.out.println("Avbrutt under bruskjop");
        } finally {
            brusLaas.unlock();
        }
    }

    public void fyllBrus()  {
      brusLaas.lock();
      try {
          while(brusTeller > 0) {
              trengerPaafyll.await();
          }
          brusTeller = kapasitet;
          System.out.printf("Maskinen er fylt opp. Det er %d brus i maskinen%n", brusTeller);
          harBrusTilSalgs.signalAll();
      } catch (InterruptedException e) {
          System.out.println("Avbrutt under paafyll");
      } finally {
          brusLaas.unlock();
      }
    }


}