import coreb.FIFOArray;

/**
 *
 * @author Jure
 */
public class ATCommandHandler
{
    private FIFOArray FIFOThreads = new FIFOArray(20);
    private String currentThreadId = "0";

    public ATCommandHandler()
    {
        System.out.println("ATCommandHandler cons");
    }

    public synchronized boolean addATCommand(String id)
    {
        if(FIFOThreads.isFull())
        {
            return false; //it would be good to restart
        }
        if(FIFOThreads.isEmptey() && currentThreadId.equals("0"))
        {
            FIFOThreads.addElement(id);
            currentThreadId = (String)FIFOThreads.getOldestElement(true);
        }
        else
        {
            FIFOThreads.addElement(id);
        }


        return true;
    }

    public synchronized void commandFinished()
    {
        if(!FIFOThreads.isEmptey())
        {
            currentThreadId = (String)FIFOThreads.getOldestElement(true);
        }
        else
        {
            currentThreadId = "0";
        }
    }

    public String getThreadId()
    {
        return currentThreadId;
    }

    //SINGELTON
    private static class Loader
    {
        static ATCommandHandler INSTANCE = new ATCommandHandler();
    }

    public static ATCommandHandler getInstance()
    {
        return ATCommandHandler.Loader.INSTANCE;
    }
}