/*
 * Copyright (c) 2010-2019 Nathan Rajlich
 *
 *  Permission is hereby granted, free of charge, to any person
 *  obtaining a copy of this software and associated documentation
 *  files (the "Software"), to deal in the Software without
 *  restriction, including without limitation the rights to use,
 *  copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following
 *  conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *  OTHER DEALINGS IN THE SOFTWARE.
 */

package org.java_websocket.server;
import java.io.IOException;
import java.nio.channels.ByteChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;

import org.java_websocket.*;
import org.java_websocket.drafts.Draft;

public class DefaultSSLWebSocketServerFactory implements WebSocketServerFactory {
	protected SSLContext sslcontext;
	protected ExecutorService exec;

	public DefaultSSLWebSocketServerFactory( SSLContext sslContext ) {
		this( sslContext, Executors.newSingleThreadScheduledExecutor() );
	}

	public DefaultSSLWebSocketServerFactory( SSLContext sslContext , ExecutorService exec ) {
		if( sslContext == null || exec == null )
			throw new IllegalArgumentException();
		this.sslcontext = sslContext;
		this.exec = exec;
	}

	@Override
	public ByteChannel wrapChannel( SocketChannel channel, SelectionKey key ) throws IOException {
		SSLEngine e = sslcontext.createSSLEngine();
		/*
		 * See https://github.com/TooTallNate/Java-WebSocket/issues/466
		 *
		 * We remove TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 from the enabled ciphers since it is just available when you patch your java installation directly.
		 * E.g. firefox requests this cipher and this causes some dcs/instable connections
		 */
		List<String> ciphers = new ArrayList<String>( Arrays.asList(e.getEnabledCipherSuites()));
		ciphers.remove("TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256");
		e.setEnabledCipherSuites( ciphers.toArray( new String[ciphers.size()] ) );
		e.setUseClientMode( false );
		return new SSLSocketChannel2( channel, e, exec, key );
	}

	@Override
	public WebSocketImpl createWebSocket( WebSocketAdapter a, Draft d) {
		return new WebSocketImpl( a, d );
	}

	@Override
	public WebSocketImpl createWebSocket( WebSocketAdapter a, List<Draft> d) {
		return new WebSocketImpl( a, d );
	}
	@Override
	public void close() {
		exec.shutdown();
	}
}