/*
 *
 * 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.qpid.server.protocol.v0_10;

import java.util.Collection;
import java.util.Collections;
import java.util.UUID;

import org.apache.qpid.bytebuffer.QpidByteBuffer;
import org.apache.qpid.server.message.internal.InternalMessage;
import org.apache.qpid.server.model.NamedAddressSpace;
import org.apache.qpid.server.plugin.MessageConverter;
import org.apache.qpid.server.plugin.PluggableService;
import org.apache.qpid.server.store.StoredMessage;
import org.apache.qpid.transport.DeliveryProperties;
import org.apache.qpid.transport.Header;
import org.apache.qpid.transport.MessageDeliveryPriority;
import org.apache.qpid.transport.MessageProperties;

@PluggableService
public class MessageConverter_Internal_to_v0_10 implements MessageConverter<InternalMessage, MessageTransferMessage>
{
    @Override
    public Class<InternalMessage> getInputClass()
    {
        return InternalMessage.class;
    }

    @Override
    public Class<MessageTransferMessage> getOutputClass()
    {
        return MessageTransferMessage.class;
    }

    @Override
    public MessageTransferMessage convert(InternalMessage serverMsg, NamedAddressSpace addressSpace)
    {
        return new MessageTransferMessage(convertToStoredMessage(serverMsg), null);
    }

    private StoredMessage<MessageMetaData_0_10> convertToStoredMessage(final InternalMessage serverMsg)
    {
        final byte[] messageContent = MessageConverter_v0_10.convertToBody(serverMsg.getMessageBody());
        final MessageMetaData_0_10 messageMetaData_0_10 = convertMetaData(serverMsg,
                                                                          MessageConverter_v0_10.getBodyMimeType(
                                                                                  serverMsg.getMessageBody()),
                                                                          messageContent.length);

        return new StoredMessage<MessageMetaData_0_10>()
                {
                    @Override
                    public MessageMetaData_0_10 getMetaData()
                    {
                        return messageMetaData_0_10;
                    }

                    @Override
                    public long getMessageNumber()
                    {
                        return serverMsg.getMessageNumber();
                    }

                    @Override
                    public Collection<QpidByteBuffer> getContent(final int offset, final int length)
                    {
                        return Collections.singleton(QpidByteBuffer.wrap(messageContent, offset, length));
                    }

                    @Override
                    public void remove()
                    {
                        throw new UnsupportedOperationException();
                    }

                    @Override
                    public boolean isInMemory()
                    {
                        return true;
                    }

                    @Override
                    public boolean flowToDisk()
                    {
                        return false;
                    }
        };
    }

    private MessageMetaData_0_10 convertMetaData(InternalMessage serverMsg, final String bodyMimeType, final int size)
    {
        DeliveryProperties deliveryProps = new DeliveryProperties();
        MessageProperties messageProps = new MessageProperties();

        deliveryProps.setExpiration(serverMsg.getExpiration());
        deliveryProps.setPriority(MessageDeliveryPriority.get(serverMsg.getMessageHeader().getPriority()));
        deliveryProps.setRoutingKey(serverMsg.getInitialRoutingAddress());
        deliveryProps.setTimestamp(serverMsg.getMessageHeader().getTimestamp());

        messageProps.setContentEncoding(serverMsg.getMessageHeader().getEncoding());
        messageProps.setContentLength(size);
        messageProps.setContentType(bodyMimeType);
        if (serverMsg.getMessageHeader().getCorrelationId() != null)
        {
            messageProps.setCorrelationId(serverMsg.getMessageHeader().getCorrelationId().getBytes());
        }
        messageProps.setApplicationHeaders(serverMsg.getMessageHeader().getHeaderMap());
        String messageIdAsString = serverMsg.getMessageHeader().getMessageId();
        if (messageIdAsString != null)
        {
            try
            {
                if (messageIdAsString.startsWith("ID:"))
                {
                    messageIdAsString = messageIdAsString.substring(3);
                }
                messageProps.setMessageId(UUID.fromString(messageIdAsString));
            }
            catch (IllegalArgumentException iae)
            {
                // ignore message id is not a UUID
            }
        }
        Header header = new Header(deliveryProps, messageProps, null);
        return new MessageMetaData_0_10(header, size, serverMsg.getArrivalTime());
    }


    @Override
    public String getType()
    {
        return "Internal to v0-10";
    }
}