package performance;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

import collection.Stack;

public class Task extends Thread
{
    private final Stack<Integer> stack;
    private final double percentage;
    private final CyclicBarrier barrier;
    private int total;
    private long operations;
    private long end;
    private int random;

    public Task(Stack<Integer> stack, double percentage, CyclicBarrier barrier, int random)
    {
        super();
        this.stack = stack;
        this.percentage = percentage;
        this.barrier = barrier;
        this.total = 0;
        this.operations = 0;
        this.random = random;
    }

    private void nextInt()
    {
        this.random ^= (this.random << 6);
        this.random ^= (this.random >>> 21);
        this.random ^= (this.random << 7);
    }

    public void run()
    {
        try
        {
            this.barrier.await();
        }
        catch (InterruptedException | BrokenBarrierException e)
        {
            e.printStackTrace();
        }

        final long start = System.nanoTime();
        Main.start.compareAndSet(null, start);

        while (true)
        {
            this.nextInt();
            double choice = (this.random % 100) / 100.0;
            if (choice < percentage)
            {
                try
                {
                    this.total += this.stack.pop();
                }
                catch (Exception e)
                {
                    // do nothing
                }
            }
            else
            {
                this.nextInt();
                int data = this.random;
                this.stack.push(data);
            }
            this.operations++;

            long time = System.nanoTime();
            if (time - Main.start.get() > Main.NANO_PER_SECOND)
            {
                return;
            }
            else
            {
                this.end = time;
            }
        }
    }

    public int getTotal()
    {
        return this.total;
    }

    public long getOperations()
    {
        return this.operations;
    }

    public long getEnd()
    {
        return this.end;
    }
}