package onewayStreet;

public class CarFromSense1 extends Car {
		
	static int nCarsFromSense1untilSemaphore =0;
	static int nActiveCarsFromSense1 =0;
	
	public static synchronized int getnActiveCarsFromSense1() {
								return nActiveCarsFromSense1;	}
	public static synchronized void setnActiveCarsFromSense1(int nCars) {
						CarFromSense1.nActiveCarsFromSense1 = nCars;	}

	public static synchronized int getnCarsFromSense1untilSemaphore() {
								return nCarsFromSense1untilSemaphore;	}
	public static synchronized void setnCarsFromSense1untilSemaphore(int nCars) {
									nCarsFromSense1untilSemaphore = nCars;	}
		
	public CarFromSense1(int cid, onewayStreet o) {	super(cid,o);	}
		
	protected void crossOnewayStreet() {
				
		int varTimeToCross= getVariableTimeToCross(); int timeToCross= varTimeToCross +FixedCrossTime;
		
		try {Thread.sleep(varTimeToCross);} catch(InterruptedException e) {};
	    setnCarsFromSense1untilSemaphore(getnCarsFromSense1untilSemaphore()-1); 
			    
		sem1.release();// another auto may try to enter oneWayStreet from sense1...
		
		try {Thread.sleep(FixedCrossTime);} catch(InterruptedException e) {};// car is crossing...
		
		System.out.println ("Car carId:" +  getCarId() + 
				" took "+ timeToCross+" ms to cross oneWayStreet from Sense1. NrCarsFromSense1untilSem:" + 
						getnCarsFromSense1untilSemaphore()+" NrActiveCarsFromSense1: "+getnActiveCarsFromSense1() +". BYE.");
		
		setnActiveCarsFromSense1(getnActiveCarsFromSense1()-1);// car exits street => no more active...
	}
	
	private synchronized void trytoCrossOneWayStreet() {
		while ((onewayStreet.getSense()!= FROM_SENSE1)||((onewayStreet.isYellow()== true))) {
			getO().waitToCross();// up to nMaxCarsFromSense2toSemaphore may go from sense1
			System.out.println ("Car carId:" +  getCarId() + 
					" notified from: Sense1. Onewaystreet sense now: "
					+ getO().displaySense() + " yellow? "+onewayStreet.isYellow()+".");
		}
	}
		
	
	public void run() {
			
		setnCarsFromSense1untilSemaphore(getnCarsFromSense1untilSemaphore()+1);
		setnActiveCarsFromSense1(getnActiveCarsFromSense1()+1);
		
		System.out.println ("Car carId:" +  getCarId() + 
				" Starts from Sense1. NrCarsUntilSem: "+getnCarsFromSense1untilSemaphore()+" : "+
				getnActiveCarsFromSense1()+".");
		
		try {sem1.acquire();}	catch(InterruptedException e) {};
		
		trytoCrossOneWayStreet();
		crossOnewayStreet() ;
	}	
}