package pathfinder.BlockingQnoSeMa;

import java.util.LinkedList;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

public class NetworkSimulator_withoutSeMa<P> {
	/** Established connection */
	private LinkedList<ChannelSimulator<P>> connectedList;

	public NetworkSimulator_withoutSeMa(){
		connectedList = new LinkedList<ChannelSimulator<P>>();
	}

	/**
	 * Request to connect.
	 * Client editor use this method to connect SeMa. 
	 * @param cs
	 */
	public ChannelSimulator<P> connect(){
		ChannelSimulator<P> cs;
		if (connectedList.isEmpty()){
			BlockingQueue<P> q = new LinkedBlockingQueue<P>();
			cs = new ChannelSimulator<P>(q, q);
		}else{
			BlockingQueue<P> rq = connectedList.getLast().getWriteQ();
			BlockingQueue<P> wq = new LinkedBlockingQueue<P>();
			connectedList.getFirst().setReadQ(wq);
			
/*			ChannelSimulator<P> lastcs = connectedList.getLast();
			BlockingQueue<P> rq = lastcs.getWriteQ();

			BlockingQueue<P> wq = new LinkedBlockingQueue<P>();
			ChannelSimulator<P> firstcs = connectedList.getFirst();
			firstcs.setReadQ(wq);
*/
			cs = new ChannelSimulator<P>(rq, wq);
		}

		connectedList.addLast(cs);
		return cs;
	}

	public boolean checkAllCS(){
		for(ChannelSimulator<P> cs: connectedList){
			if(!cs.readQisEmpty()) return false;
		}
		return true;
	}
}