package org.metricshub.http;
   
   /*-
    * ╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲
    * HTTP Java Client
    * ჻჻჻჻჻჻
    * Copyright (C) 2023 MetricsHub
    * ჻჻჻჻჻჻
    * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * ╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱╲╱
   */
  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.net.Socket;
  import javax.net.ssl.SSLSocket;
  import javax.net.ssl.SSLSocketFactory;
  
  /**
   * A {@link SSLSocketFactory} which uses an existing {@link SSLSocketFactory} to delegate its operations to and overrides the
   * {@link javax.net.ssl.SSLSocket#getEnabledProtocols() enabled protocols} to the protocols that were passed to its
   * {@link #ProtocolOverridingSSLSocketFactory(javax.net.ssl.SSLSocketFactory, String[]) constructor}
   *
   */
  public class ProtocolOverridingSSLSocketFactory extends SSLSocketFactory {
  
  	private final SSLSocketFactory underlyingSSLSocketFactory;
  	private final String[] enabledProtocols;
  
  	/**
  	 * Constructs a {@code ProtocolOverridingSSLSocketFactory} with the given
  	 * delegate {@link SSLSocketFactory} and array of enabled protocols.
  	 *
  	 * @param delegate         The underlying {@link SSLSocketFactory} to delegate operations to.
  	 * @param enabledProtocols The array of protocols to be set as enabled protocols.
  	 */
  	public ProtocolOverridingSSLSocketFactory(final SSLSocketFactory delegate, final String[] enabledProtocols) {
  		this.underlyingSSLSocketFactory = delegate;
  		this.enabledProtocols = enabledProtocols;
  	}
  
  	@Override
  	public String[] getDefaultCipherSuites() {
  		return underlyingSSLSocketFactory.getDefaultCipherSuites();
  	}
  
  	@Override
  	public String[] getSupportedCipherSuites() {
  		return underlyingSSLSocketFactory.getSupportedCipherSuites();
  	}
  
  	@Override
  	public Socket createSocket(final Socket socket, final String host, final int port, final boolean autoClose)
  		throws IOException {
  		Socket underlyingSocket = underlyingSSLSocketFactory.createSocket(socket, host, port, autoClose);
  		return overrideProtocol(underlyingSocket);
  	}
  
  	@Override
  	public Socket createSocket(final String host, final int port) throws IOException {
  		Socket underlyingSocket = underlyingSSLSocketFactory.createSocket(host, port);
  		return overrideProtocol(underlyingSocket);
  	}
  
  	@Override
  	public Socket createSocket(final String host, final int port, final InetAddress localAddress, final int localPort)
  		throws IOException {
  		Socket underlyingSocket = underlyingSSLSocketFactory.createSocket(host, port, localAddress, localPort);
  		return overrideProtocol(underlyingSocket);
  	}
  
  	@Override
  	public Socket createSocket(final InetAddress host, final int port) throws IOException {
  		Socket underlyingSocket = underlyingSSLSocketFactory.createSocket(host, port);
  		return overrideProtocol(underlyingSocket);
  	}
  
  	@Override
  	public Socket createSocket(
  		final InetAddress host,
  		final int port,
  		final InetAddress localAddress,
  		final int localPort
  	) throws IOException {
  		Socket underlyingSocket = underlyingSSLSocketFactory.createSocket(host, port, localAddress, localPort);
  		return overrideProtocol(underlyingSocket);
  	}
  
  	/**
 	 * Set the {@link javax.net.ssl.SSLSocket#getEnabledProtocols() enabled protocols} to {@link #enabledProtocols} if the <code>socket</code> is a
 	 * {@link SSLSocket}
 	 *
 	 * @param socket The Socket
 	 * @return the amended socket
 	 **/
 	private Socket overrideProtocol(final Socket socket) {
 		if (socket instanceof SSLSocket && enabledProtocols != null && enabledProtocols.length > 0) {
 			((SSLSocket) socket).setEnabledProtocols(enabledProtocols);
 		}
 		return socket;
 	}
 }