/*
 * Copyright 2008-2016 MongoDB, Inc.
 *
 * 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.
 */

package com.mongodb.connection;

import com.mongodb.MongoInternalException;
import com.mongodb.ServerAddress;

import javax.net.ssl.SSLParameters;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.net.Socket;

import static com.mongodb.internal.connection.SslHelper.enableHostNameVerification;
import static com.mongodb.internal.connection.SslHelper.enableSni;
import static java.util.concurrent.TimeUnit.MILLISECONDS;

final class SocketStreamHelper {
    static void initialize(final Socket socket, final ServerAddress address, final SocketSettings settings, final SslSettings sslSettings)
    throws IOException {
        socket.setTcpNoDelay(true);
        socket.setSoTimeout(settings.getReadTimeout(MILLISECONDS));
        socket.setKeepAlive(settings.isKeepAlive());
        if (settings.getReceiveBufferSize() > 0) {
            socket.setReceiveBufferSize(settings.getReceiveBufferSize());
        }
        if (settings.getSendBufferSize() > 0) {
            socket.setSendBufferSize(settings.getSendBufferSize());
        }
        if (sslSettings.isEnabled() || socket instanceof SSLSocket) {
            if (!(socket instanceof SSLSocket)) {
                throw new MongoInternalException("SSL is enabled but the socket is not an instance of javax.net.ssl.SSLSocket");
            }
            SSLSocket sslSocket = (SSLSocket) socket;
            SSLParameters sslParameters = sslSocket.getSSLParameters();

            enableSni(address, sslParameters);

            if (!sslSettings.isInvalidHostNameAllowed()) {
                enableHostNameVerification(sslParameters);
            }
            sslSocket.setSSLParameters(sslParameters);
        }
        socket.connect(address.getSocketAddress(), settings.getConnectTimeout(MILLISECONDS));
    }

    private SocketStreamHelper() {
    }
}