import java.util.LinkedList;
import java.util.Queue;

/**
 * Implements your code here.
 * Change comments
 * @Author Your Name
 * @Date
 */
public class KPGuitarString implements GuitarString{

    private Queue<Double> ringBuffer;
   // private RingBuffer ring;
    private int strlen;
    private int time;
    private static final int SAMPLE = 44100;
    private static final double ENERGY = .996;


    public KPGuitarString(double frequency)
    {
        time = 0;
        int length = (int) Math.ceil(SAMPLE / frequency);
        strlen = length;
        //ring = new RingBuffer(length);
        ringBuffer = new LinkedList<>();
        for (int i = 0; i < length; i++) {
            ringBuffer.add(0.0);
       }
//       while(!ring.isFull())
//           ring.enqueue(0);

    }

    public KPGuitarString(double[] init)
    {
        time = 0;
        ringBuffer = (Queue<Double>) new RingBuffer(init.length);
        for(int i = 0; i < init.length; i++)
        {
           // ring.enqueue(init[i]);
            ringBuffer.add(init[i]);
        }

    }
    /**
     * Implement your code here
     * Change comments
     */
    @Override
    public void pluck(){
        for(int i = 0; i < strlen; i++)
        {
            double rnd = Math.random() - 0.5;
           // ring.enqueue(rnd);
            ringBuffer.add(rnd);
        }
    }

    /**
     * Implement your code here
     * Change comments
     */
    @Override
    public void tic(){
       // double first = ring.dequeue();
        double first = ringBuffer.remove();
        double second = sample();
        ringBuffer.add(ENERGY * (first + second) / 2 );
        time++;
    }

    /**
     * Implement your code here
     * Change comments
     */
    @Override
    public double sample()
    {
        return ringBuffer.peek();
    }

}