package org.apache.maven.continuum.wagon;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.maven.wagon.authentication.AuthenticationInfo;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Initializable;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.InitializationException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Startable;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.StartingException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.StoppingException;
import org.mortbay.http.BasicAuthenticator;
import org.mortbay.http.HashUserRealm;
import org.mortbay.http.SecurityConstraint;
import org.mortbay.http.SocketListener;
import org.mortbay.http.handler.SecurityHandler;
import org.mortbay.jetty.Server;
import org.mortbay.jetty.servlet.ServletHolder;
import org.mortbay.jetty.servlet.ServletHttpContext;
import org.mortbay.util.MultiException;

/**
 * Plexus Component to start a Jetty Server with servlet settings.
 * 
 * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>
 */
public class ServletServer
    implements Initializable, Startable
{
    public static final String ROLE = ServletServer.class.getName();
    
    private Server server;

    private int port;

    private List contexts;

    public void initialize()
        throws InitializationException
    {
        server = new Server();

        SocketListener listener = new SocketListener();
        listener.setPort( port );

        server.addListener( listener );

        if ( contexts != null )
        {
            try
            {
                Iterator itcontext = contexts.iterator();

                while ( itcontext.hasNext() )
                {
                    Context wdc = (Context) itcontext.next();

                    ServletHttpContext context = (ServletHttpContext) server.getContext( wdc.getId() );

                    initContext( wdc, context );
                }
            }
            catch ( Exception e )
            {
                throw new InitializationException( "Unable to initialize.", e );
            }
        }
    }

    private void initContext( Context wdc, ServletHttpContext context )
        throws ClassNotFoundException, InstantiationException, IllegalAccessException
    {
        AuthenticationInfo authenticationInfo = wdc.getAuthenticationInfo();
        if ( authenticationInfo != null )
        {
            HashUserRealm userRealm = new HashUserRealm( "basic" );
            userRealm.put( authenticationInfo.getUserName(), authenticationInfo.getPassword() );
            context.getHttpServer().addRealm( userRealm );

            context.setAuthenticator( new BasicAuthenticator() );
            context.addSecurityConstraint( "/*", new SecurityConstraint( "any", SecurityConstraint.ANY_ROLE ) );
            context.addHandler( new SecurityHandler() );
        }

        Iterator itpaths = wdc.getServlets().iterator();
        while ( itpaths.hasNext() )
        {
            Servlet servlet = (Servlet) itpaths.next();
            initServlet( context, servlet );
        }
    }

    private void initServlet( ServletHttpContext context, Servlet path )
        throws ClassNotFoundException, InstantiationException, IllegalAccessException
    {
        ServletHolder servlet = context.addServlet( path.getId(), path.getPath(), path.getServlet() );

        Iterator itparams = path.getParameters().entrySet().iterator();
        while ( itparams.hasNext() )
        {
            Map.Entry entry = (Entry) itparams.next();
            servlet.setInitParameter( (String) entry.getKey(), (String) entry.getValue() );
        }
    }

    public void start()
        throws StartingException
    {
        try
        {
            server.start();
        }
        catch ( MultiException e )
        {
            throw new StartingException( "Error starting the jetty webdav server: ", e );
        }
    }

    public void stop()
        throws StoppingException
    {
        try
        {
            server.stop();
        }
        catch ( InterruptedException e )
        {
            throw new StoppingException( "Error stopping the jetty webdav server: ", e );
        }
    }
}