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// 
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// 
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// 
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// 
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
// 
package org.eclipse.jetty.io;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.Executor;
import javax.net.ssl.SSLEngine;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;

// @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
@Deprecated(since = "2021-05-27")
public abstract class NegotiatingClientConnection extends AbstractConnection {

    private static final Logger LOG = Log.getLogger(NegotiatingClientConnection.class);

    private final SSLEngine engine;

    private final ClientConnectionFactory connectionFactory;

    private final Map context;

    private volatile boolean completed;

    protected NegotiatingClientConnection(EndPoint endp, Executor executor, SSLEngine sslEngine, ClientConnectionFactory connectionFactory, Map context) {
        super(endp, executor);
        this.engine = sslEngine;
        this.connectionFactory = connectionFactory;
        this.context = context;
    }

    public SSLEngine getSSLEngine() {
        return engine;
    }

    protected void completed() {
        completed = true;
    }

    @Override
    public void onOpen() {
        super.onOpen();
        try {
            getEndPoint().flush(BufferUtil.EMPTY_BUFFER);
            if (completed)
                replaceConnection();
            else
                fillInterested();
        } catch (IOException x) {
            close();
            throw new RuntimeIOException(x);
        }
    }

    @Override
    public void onFillable() {
        while (true) {
            int filled = fill();
            if (completed || filled < 0) {
                replaceConnection();
                break;
            }
            if (filled == 0) {
                fillInterested();
                break;
            }
        }
    }

    private int fill() {
        try {
            return getEndPoint().fill(BufferUtil.EMPTY_BUFFER);
        } catch (IOException x) {
            LOG.debug(x);
            close();
            return -1;
        }
    }

    private void replaceConnection() {
        EndPoint endPoint = getEndPoint();
        try {
            endPoint.upgrade(connectionFactory.newConnection(endPoint, context));
        } catch (Throwable x) {
            LOG.debug(x);
            close();
        }
    }

    @Override
    public void close() {
        // Gentler close for SSL.
        getEndPoint().shutdownOutput();
        super.close();
    }
}