import java.util.concurrent.*;

public class P1_War implements Runnable{
   
    Semaphore sem;
    private int id;                     //ID number of the WAR
    private boolean atDock;             //Is the WAR at the dock? True if at dock
    private int trackNum;               //Which track does the WAR operate in? 1 or 2?
    
    /**
     * WAR (Wharehouse Assistance Robot) object
     * @param idInput ID number for the WAR
     * @param trackNumInput The track that the WAR is on
     * @param atDockInput   Is the WAR at the dock (True) or at Storage (False)
     */
    public P1_War(int idInput, int trackNumInput, boolean atDockInput, Semaphore intersection) {
        id = idInput;
        atDock = atDockInput;
        trackNum = trackNumInput;
        this.sem=intersection;
    }

    public void run()
    {
        String loadedState;
        if(atDock)
        {
            loadedState = " (Loaded) ";
        }
        else
        {
            loadedState = " (Unloaded) ";
        }  

        System.out.println("WAR-"+id+loadedState+"Waiting at the Intersection. Going towards Storage"+trackNum);

        //aquire semaphore
        sem.acquireUninterruptibly();

        for(int i = 1; i<3; i++)
        {
            System.out.println("WAR-"+id+loadedState+"Crossing intersection Checkpoint "+i+".");
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                // Don't care
                //e.printStackTrace();
            }
        }

        System.out.println("WAR-"+id+loadedState+"Crossed the intersection.");

        sem.release();
        //Change location to the otherside of the intersection
        atDock=!atDock;
    }

    //Getters
    public int getID()
    {
        return id;
    }

    public boolean getAtDock()
    {
        return atDock;
    }

    public int getTrackNum()
    {
        return trackNum;
    }

    //Setters
    public void setAtDock(boolean atDockInput)
    {
        atDock=atDockInput;
    }

}