package rep.channel;

import java.io.IOException;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.nio.channels.spi.SelectorProvider;
import java.util.HashMap;

public class REPSocketChannel<P> extends SelectableChannel{

	public SocketChannel sc;
	private REPPack<P> pack;
	static public HashMap<SelectableChannel,SelectableChannel> channels = new HashMap<SelectableChannel,SelectableChannel>();  

	public REPSocketChannel(SocketChannel channel, REPPack<P> packer) {
		sc = channel;
		pack = packer;
		addChannel(sc,this);
	}

	public REPSocketChannel(SelectableChannel channel, REPPack<P> packer) {
		sc = (SocketChannel)channel;
		pack = packer;
		addChannel(sc,this);
	}

	public static void addChannel(SelectableChannel sc,SelectableChannel rc) {
		channels.put(sc, rc);
	}

	public void close1() throws IOException {
		removeChannel(sc);
		sc.close();
	}

	public static void removeChannel(SelectableChannel sc) throws IOException {
		if(channels.containsKey(sc)) channels.remove(sc);
	}
	
	@Override
	public Object blockingLock() {
		return sc.blockingLock();
	}

	@Override
	public SelectableChannel configureBlocking(boolean block) throws IOException {
		return sc.configureBlocking(block);
	}

	@Override
	public boolean isBlocking() {
		return sc.isBlocking();
	}

	@Override
	public boolean isRegistered() {
		return sc.isRegistered();
	}

	@Override
	public SelectionKey keyFor(Selector sel) {
		return sc.keyFor(sel);
	}

	@Override
	public SelectorProvider provider() {
		return sc.provider();
	}


	public SelectionKey register(REPSelector<P> sel, int ops, Object att) throws ClosedChannelException {
		return sc.register(sel.selector, ops, att);
	}
	@Override
	public SelectionKey register(Selector sel, int ops, Object att)
			throws ClosedChannelException {
		if (sel instanceof REPSelector){
			return sc.register(((REPSelector<?>)sel).selector, ops);
		}else if(sel instanceof Selector){
			return sc.register(sel, ops);
		}else 
			return null;
		//assert(false);
		//return null;
	}


	@Override
	public int validOps() {
		return sc.validOps();
	}

	@Override
	protected void implCloseChannel() throws IOException {
		sc.close();
	}

	public long read(ByteBuffer header) {
		// TODO Auto-generated method stub
		return 0;
	}

	public void write(ByteBuffer buffer) throws IOException {
		// TODO Auto-generated method stub
		
	}

	public boolean finishConnect() {
		// TODO Auto-generated method stub
		return false;
	}

	public Socket socket() {
		// TODO Auto-generated method stub
		return null;
	}
	
	public P read() throws IOException{
		return pack.unpackUConv(sc);
	}
	public boolean write(P p){
		ByteBuffer bb = pack.packUConv(p);
		if (bb==null) return true;
		try {
			while (bb.remaining() > 0 ){
				sc.write(bb);
			}
			return true;
		} catch (IOException e) {
			return false;
		}
	}

	public static <T> REPSocketChannel<T> create(REPPack<T> packer) throws IOException {
		if (REPServerSocketChannel.isSimulation) {
			return new ChannelSimulator<T>();
		} else {
			REPSocketChannel<T> rsc = new REPSocketChannel<T>(SocketChannel.open(), packer);
			return rsc;
		}
	}


	public boolean connect(SocketAddress semaIP) throws IOException {
		return sc.connect(semaIP);
	}



}