package onewayStreet;

public class CarFromSense2 extends Car {
				
	static int nCarsFromSense2untilSemaphore =0;
	static int nActiveCarsFromSense2 =0;
	
	public static synchronized int getnActiveCarsFromSense2() {
		return nActiveCarsFromSense2;	}
	public static synchronized void setnActiveCarsFromSense2(int nCars) {
						CarFromSense2.nActiveCarsFromSense2 = nCars;	}
		
	public static synchronized int getnCarsFromSense2untilSemaphore() {
								return nCarsFromSense2untilSemaphore;	}

	public static synchronized void setnCarsFromSense2untilSemaphore(int nCars) {
									nCarsFromSense2untilSemaphore = nCars;	}
		
	public CarFromSense2(int cid, onewayStreet o) {	super(cid,o);	}
	
	
	protected void crossOnewayStreet() {
		
		int varTimeToCross= getVariableTimeToCross(); int timeToCross= varTimeToCross +FixedCrossTime;
		
		try {Thread.sleep(varTimeToCross);} catch(InterruptedException e) {};
	    setnCarsFromSense2untilSemaphore(getnCarsFromSense2untilSemaphore()-1); 
					
	    sem2.release();
		try {Thread.sleep(FixedCrossTime);} catch(InterruptedException e) {};
				
		System.out.println ("Car carId:" +  getCarId() + 
				" took "+ timeToCross+" ms to cross oneWayStreet from Sense2. NrCarsFromSense2untilSem:" + 
						getnCarsFromSense2untilSemaphore()+" NrActiveCarsFromSense2: "+getnActiveCarsFromSense2() +". BYE.");
				
		setnActiveCarsFromSense2(getnActiveCarsFromSense2()-1);
	}
	
	
	private synchronized void trytoCrossOneWayStreet() {
		while ((onewayStreet.getSense()!= FROM_SENSE2)||((onewayStreet.isYellow()== true))) {
			getO().waitToCross();	// up to nMaxCarsFromSense2toSemaphore may go in sense2
			System.out.println ("Car carId:" +  getCarId() + 
					" notified from Sense2. Onewaystreet sense now: " +
					getO().displaySense() + " yellow? "+ onewayStreet.isYellow() + ".");
		}
	}
	
	
	public void run() {
		
		setnCarsFromSense2untilSemaphore(getnCarsFromSense2untilSemaphore()+1);
		setnActiveCarsFromSense2(getnActiveCarsFromSense2()+1);
		
		System.out.println ("Car carId:" +  getCarId() + 
				" Starts from Sense2. NrCarsUntilSem: "+getnCarsFromSense2untilSemaphore()+" : "+
				getnActiveCarsFromSense2()+".");
		
		try {sem2.acquire();}	catch(InterruptedException e) {};	
		
		trytoCrossOneWayStreet();			
		crossOnewayStreet() ;			
	}	
}