package goodjava.lucene.backup;

import java.io.File;
import java.io.IOException;
import java.util.Map;
import java.net.Socket;
import java.net.ServerSocket;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.Executors;
import javax.net.ssl.SSLServerSocketFactory;
import javax.net.ssl.SSLServerSocket;
import goodjava.util.SoftCacheMap;
import goodjava.io.IoUtils;
import goodjava.rpc.RpcServer;
import goodjava.rpc.RpcCall;
import goodjava.logging.Logger;
import goodjava.logging.LoggerFactory;


public class BackupServer {
	private static final Logger logger = LoggerFactory.getLogger(BackupServer.class);

	public static int port = 9101;
	public static String[] cipherSuites = new String[] {
		"TLS_DH_anon_WITH_AES_128_GCM_SHA256",
		"TLS_DH_anon_WITH_AES_128_CBC_SHA256",
		"TLS_ECDH_anon_WITH_AES_128_CBC_SHA",
		"TLS_DH_anon_WITH_AES_128_CBC_SHA",
		"TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA",
		"SSL_DH_anon_WITH_3DES_EDE_CBC_SHA",
		"TLS_ECDH_anon_WITH_RC4_128_SHA",
		"SSL_DH_anon_WITH_RC4_128_MD5",
		"SSL_DH_anon_WITH_DES_CBC_SHA",
		"SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA",
		"SSL_DH_anon_EXPORT_WITH_RC4_40_MD5",
	};
	static {
		cipherSuites = null;  // for now, until I figure out disgusting java security
	}

	private final File backupDir;
	private static final ThreadPoolExecutor threadPool = (ThreadPoolExecutor)Executors.newCachedThreadPool();
	private static final Map<String,Backup> backups = new SoftCacheMap<String,Backup>();

	public BackupServer(File backupDir) throws IOException {
		this.backupDir = backupDir;
		IoUtils.mkdirs(backupDir);
	}

	public synchronized void start() throws IOException {
		final ServerSocket ss;
		if( cipherSuites == null ) {
			ss = new ServerSocket(port);
		} else {
			ss = SSLServerSocketFactory.getDefault().createServerSocket(port);
			((SSLServerSocket)ss).setEnabledCipherSuites(cipherSuites);
		}
		threadPool.execute(new Runnable(){public void run() {
			try {
				while(!threadPool.isShutdown()) {
					final Socket socket = ss.accept();
					threadPool.execute(new Runnable(){public void run() {
						handle(socket);
					}});
				}
			} catch(IOException e) {
				logger.error("",e);
			}
		}});
		logger.info("started server on port "+port);
	}

	private void handle(Socket socket) {
		RpcServer rpc = new RpcServer(socket);
		while( !rpc.isClosed() ) {
			RpcCall call = rpc.read();
			if( call == null )
				break;
			String name = (String)call.args[0];
			Backup backup;
			synchronized(backups) {
				backup = backups.get(name);
				if( backup == null ) {
					backup = new Backup(new File(backupDir,name));
					backups.put(name,backup);
				}
			}
			backup.handle(rpc,call);
		}
	}

}