/**
 * 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.
 */

package org.apache.cxf.transport.local;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Logger;

import javax.annotation.Resource;

import org.apache.cxf.Bus;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.helpers.CastUtils;
import org.apache.cxf.message.Message;
import org.apache.cxf.service.model.EndpointInfo;
import org.apache.cxf.transport.AbstractTransportFactory;
import org.apache.cxf.transport.Conduit;
import org.apache.cxf.transport.ConduitInitiator;
import org.apache.cxf.transport.Destination;
import org.apache.cxf.transport.DestinationFactory;
import org.apache.cxf.ws.addressing.AttributedURIType;
import org.apache.cxf.ws.addressing.EndpointReferenceType;

public class LocalTransportFactory extends AbstractTransportFactory
    implements DestinationFactory, ConduitInitiator {
   
    public static final String TRANSPORT_ID = "http://cxf.apache.org/transports/local";
    public static final String MESSAGE_FILTER_PROPERTIES 
        = LocalTransportFactory.class.getName() + ".filterProperties";
    public static final String MESSAGE_INCLUDE_PROPERTIES 
        = LocalTransportFactory.class.getName() + ".includeProperties";

    private static final Logger LOG = LogUtils.getL7dLogger(LocalTransportFactory.class);
    private static final Set<String> URI_PREFIXES = new HashSet<String>();

    static {
        URI_PREFIXES.add("local://");
    }
    
    private Map<String, Destination> destinations = new HashMap<String, Destination>();
    private Bus bus;

    private Set<String> messageFilterProperties;
    private Set<String> messageIncludeProperties;
    
    public LocalTransportFactory() {
        super();
        List<String> ids = new ArrayList<String>();
        ids.add(TRANSPORT_ID);
        setTransportIds(ids);
        
        messageFilterProperties = new HashSet<String>();
        messageIncludeProperties = new HashSet<String>();
        messageFilterProperties.add(Message.REQUESTOR_ROLE); 
        
        messageIncludeProperties.add(Message.PROTOCOL_HEADERS);
        messageIncludeProperties.add(Message.ENCODING);
        messageIncludeProperties.add(Message.CONTENT_TYPE);
        messageIncludeProperties.add(Message.ACCEPT_CONTENT_TYPE);
        messageIncludeProperties.add(Message.RESPONSE_CODE);
    }
    
    @Resource(name = "cxf")
    public void setBus(Bus b) {
        bus = b;
    }

    public Bus getBus() {
        return bus;
    }
    
    public Destination getDestination(EndpointInfo ei) throws IOException {
        return getDestination(ei, createReference(ei));
    }

    protected Destination getDestination(EndpointInfo ei,
                                         EndpointReferenceType reference)
        throws IOException {
        Destination d = destinations.get(reference.getAddress().getValue());
        if (d == null) {
            d = createDestination(ei, reference);
            destinations.put(reference.getAddress().getValue(), d);
        }
        return d;
    }

    private Destination createDestination(EndpointInfo ei, EndpointReferenceType reference) {
        LOG.info("Creating destination for address " + reference.getAddress().getValue());
        return new LocalDestination(this, reference, ei);
    }

    void remove(LocalDestination destination) {
        destinations.remove(destination);
    }

    public Conduit getConduit(EndpointInfo ei) throws IOException {
        return new LocalConduit(this, (LocalDestination)getDestination(ei));
    }

    public Conduit getConduit(EndpointInfo ei, EndpointReferenceType target) throws IOException {
        return new LocalConduit(this, (LocalDestination)getDestination(ei, target));
    }

    EndpointReferenceType createReference(EndpointInfo ei) {
        EndpointReferenceType epr = new EndpointReferenceType();
        AttributedURIType address = new AttributedURIType();
        address.setValue(ei.getAddress());
        epr.setAddress(address);
        return epr;
    }

    public Set<String> getUriPrefixes() {
        return URI_PREFIXES;
    }

    public Set<String> getMessageFilterProperties() {
        return messageFilterProperties;
    }

    public void setMessageFilterProperties(Set<String> props) {
        this.messageFilterProperties = props;
    }
    public Set<String> getIncludeMessageProperties() {
        return messageIncludeProperties;
    }

    public void setMessageIncludeProperties(Set<String> props) {
        this.messageIncludeProperties = props;
    }

    
    public void copy(Message message, Message copy) {
        Set<String> filter = CastUtils.cast((Set)message.get(MESSAGE_FILTER_PROPERTIES));
        if (filter == null) {
            filter = messageFilterProperties;
        }
        
        Set<String> includes =  CastUtils.cast((Set)message.get(MESSAGE_INCLUDE_PROPERTIES));
        if (includes == null) {
            includes = messageIncludeProperties;
        }

        // copy all the contents
        for (Map.Entry<String, Object> e : message.entrySet()) {
            if ((includes.contains(e.getKey())
                || messageIncludeProperties.contains(e.getKey()))
                && !filter.contains(e.getKey())) {
                copy.put(e.getKey(), e.getValue());
            }
        }
    }    
}
