// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;

import com.google.inject.Inject;
import com.yahoo.jdisc.Metric;
import com.yahoo.jdisc.http.ConnectorConfig;
import com.yahoo.jdisc.http.ssl.SslContextFactoryProvider;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.SecureRequestCustomizer;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.SslConnectionFactory;
import org.eclipse.jetty.util.ssl.SslContextFactory;

import java.nio.channels.ServerSocketChannel;

/**
 * @author Einar M R Rosenvinge
 * @author bjorncs
 */
public class ConnectorFactory {

    private final ConnectorConfig connectorConfig;
    private final SslContextFactoryProvider sslContextFactoryProvider;

    @Inject
    public ConnectorFactory(ConnectorConfig connectorConfig,
                            SslContextFactoryProvider sslContextFactoryProvider) {
        this.connectorConfig = connectorConfig;
        this.sslContextFactoryProvider = sslContextFactoryProvider;
    }

    public ConnectorConfig getConnectorConfig() {
        return connectorConfig;
    }

    public ServerConnector createConnector(final Metric metric, final Server server, final ServerSocketChannel ch) {
        ServerConnector connector;
        if (connectorConfig.ssl().enabled()) {
            connector = new JDiscServerConnector(connectorConfig, metric, server, ch,
                                                 newSslConnectionFactory(),
                                                 newHttpConnectionFactory());
        } else {
            connector = new JDiscServerConnector(connectorConfig, metric, server, ch,
                                                 newHttpConnectionFactory());
        }
        connector.setPort(connectorConfig.listenPort());
        connector.setName(connectorConfig.name());
        connector.setAcceptQueueSize(connectorConfig.acceptQueueSize());
        connector.setReuseAddress(connectorConfig.reuseAddress());
        connector.setIdleTimeout((long)(connectorConfig.idleTimeout() * 1000.0));
        connector.setStopTimeout((long)(connectorConfig.stopTimeout() * 1000.0));
        return connector;
    }

    private HttpConnectionFactory newHttpConnectionFactory() {
        HttpConfiguration httpConfig = new HttpConfiguration();
        httpConfig.setSendDateHeader(true);
        httpConfig.setSendServerVersion(false);
        httpConfig.setSendXPoweredBy(false);
        httpConfig.setHeaderCacheSize(connectorConfig.headerCacheSize());
        httpConfig.setOutputBufferSize(connectorConfig.outputBufferSize());
        httpConfig.setRequestHeaderSize(connectorConfig.requestHeaderSize());
        httpConfig.setResponseHeaderSize(connectorConfig.responseHeaderSize());
        if (connectorConfig.ssl().enabled()) {
            httpConfig.addCustomizer(new SecureRequestCustomizer());
        }
        return new HttpConnectionFactory(httpConfig);
    }

    private SslConnectionFactory newSslConnectionFactory() {
        SslContextFactory factory = sslContextFactoryProvider.getInstance(connectorConfig.name(), connectorConfig.listenPort());
        return new SslConnectionFactory(factory, HttpVersion.HTTP_1_1.asString());
    }

}