/*
 *
 * 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.framing;

import java.nio.ByteBuffer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.qpid.transport.ByteBufferSender;
import org.apache.qpid.util.ByteBufferUtils;

public class BasicContentHeaderProperties
{
    //persistent & non-persistent constants, values as per JMS DeliveryMode
    public static final byte NON_PERSISTENT = 1;
    public static final byte PERSISTENT = 2;

    private static final Logger _logger = LoggerFactory.getLogger(BasicContentHeaderProperties.class);

    private static final AMQShortString ZERO_STRING = null;

    private AMQShortString _contentType;

    private AMQShortString _encoding;

    private FieldTable _headers;

    private byte _deliveryMode;

    private byte _priority;

    private AMQShortString _correlationId;

    private AMQShortString _replyTo;

    private long _expiration;

    private AMQShortString _messageId;

    private long _timestamp;

    private AMQShortString _type;

    private AMQShortString _userId;

    private AMQShortString _appId;

    private AMQShortString _clusterId;

    private int _propertyFlags = 0;
    private static final int CONTENT_TYPE_MASK = 1 << 15;
    private static final int ENCODING_MASK = 1 << 14;
    private static final int HEADERS_MASK = 1 << 13;
    private static final int DELIVERY_MODE_MASK = 1 << 12;
    private static final int PRIORITY_MASK = 1 << 11;
    private static final int CORRELATION_ID_MASK = 1 << 10;
    private static final int REPLY_TO_MASK = 1 << 9;
    private static final int EXPIRATION_MASK = 1 << 8;
    private static final int MESSAGE_ID_MASK = 1 << 7;
    private static final int TIMESTAMP_MASK = 1 << 6;
    private static final int TYPE_MASK = 1 << 5;
    private static final int USER_ID_MASK = 1 << 4;
    private static final int APPLICATION_ID_MASK = 1 << 3;
    private static final int CLUSTER_ID_MASK = 1 << 2;

    private ByteBuffer _encodedForm;


    public BasicContentHeaderProperties(BasicContentHeaderProperties other)
    {
        if(other._headers != null)
        {
            _headers = new FieldTable(other._headers);
        }

        _contentType = other._contentType;

        _encoding = other._encoding;

        _deliveryMode = other._deliveryMode;

        _priority = other._priority;

        _correlationId = other._correlationId;

        _replyTo = other._replyTo;

        _expiration = other._expiration;

        _messageId = other._messageId;

        _timestamp = other._timestamp;

        _type = other._type;

        _userId = other._userId;

        _appId = other._appId;

        _clusterId = other._clusterId;
        
        _propertyFlags = other._propertyFlags;
    }

    public BasicContentHeaderProperties()
    { 
    }

    public synchronized int getPropertyListSize()
    {
        if(useEncodedForm())
        {
            return _encodedForm.remaining();
        }
        else
        {
            int size = 0;

            if ((_propertyFlags & (CONTENT_TYPE_MASK)) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_contentType);
            }

            if ((_propertyFlags & ENCODING_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_encoding);
            }

            if ((_propertyFlags & HEADERS_MASK) != 0)
            {
                size += EncodingUtils.encodedFieldTableLength(_headers);
            }

            if ((_propertyFlags & DELIVERY_MODE_MASK) != 0)
            {
                size += 1;
            }

            if ((_propertyFlags & PRIORITY_MASK) != 0)
            {
                size += 1;
            }

            if ((_propertyFlags & CORRELATION_ID_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_correlationId);
            }

            if ((_propertyFlags & REPLY_TO_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_replyTo);
            }

            if ((_propertyFlags & EXPIRATION_MASK) != 0)
            {
                if (_expiration == 0L)
                {
                    size += EncodingUtils.encodedShortStringLength(ZERO_STRING);
                }
                else
                {
                    size += EncodingUtils.encodedShortStringLength(_expiration);
                }
            }

            if ((_propertyFlags & MESSAGE_ID_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_messageId);
            }

            if ((_propertyFlags & TIMESTAMP_MASK) != 0)
            {
                size += 8;
            }

            if ((_propertyFlags & TYPE_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_type);
            }

            if ((_propertyFlags & USER_ID_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_userId);
            }

            if ((_propertyFlags & APPLICATION_ID_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_appId);
            }

            if ((_propertyFlags & CLUSTER_ID_MASK) != 0)
            {
                size += EncodingUtils.encodedShortStringLength(_clusterId);
            }

            return size;
        }
    }

    public void setPropertyFlags(int propertyFlags)
    {
        _propertyFlags = propertyFlags;
    }

    public int getPropertyFlags()
    {
        return _propertyFlags;
    }

    public synchronized long writePropertyListPayload(ByteBuffer buffer)
    {
        if(useEncodedForm())
        {
            ByteBufferUtils.copyTo(_encodedForm, buffer);
            return _encodedForm.remaining();

        }
        else
        {
            int propertyListSize = getPropertyListSize();

            if ((_propertyFlags & (CONTENT_TYPE_MASK)) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _contentType);
            }

            if ((_propertyFlags & ENCODING_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _encoding);
            }

            if ((_propertyFlags & HEADERS_MASK) != 0)
            {
                EncodingUtils.writeFieldTableBytes(buffer, _headers);
            }

            if ((_propertyFlags & DELIVERY_MODE_MASK) != 0)
            {
                buffer.put(_deliveryMode);
            }

            if ((_propertyFlags & PRIORITY_MASK) != 0)
            {
                buffer.put(_priority);
            }

            if ((_propertyFlags & CORRELATION_ID_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _correlationId);
            }

            if ((_propertyFlags & REPLY_TO_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _replyTo);
            }

            if ((_propertyFlags & EXPIRATION_MASK) != 0)
            {
                if (_expiration == 0L)
                {
                    EncodingUtils.writeShortStringBytes(buffer, ZERO_STRING);
                }
                else
                {
                    EncodingUtils.writeLongAsShortString(buffer, _expiration);
                }
            }

            if ((_propertyFlags & MESSAGE_ID_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _messageId);
            }

            if ((_propertyFlags & TIMESTAMP_MASK) != 0)
            {
                buffer.putLong(_timestamp);
            }

            if ((_propertyFlags & TYPE_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _type);
            }

            if ((_propertyFlags & USER_ID_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _userId);
            }

            if ((_propertyFlags & APPLICATION_ID_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _appId);
            }

            if ((_propertyFlags & CLUSTER_ID_MASK) != 0)
            {
                EncodingUtils.writeShortStringBytes(buffer, _clusterId);
            }

            return propertyListSize;
        }
    }

    public int read(ByteBuffer input)
    {

        _propertyFlags = ByteBufferUtils.getUnsignedShort(input);
        int length = 2;
        if ((_propertyFlags & (CONTENT_TYPE_MASK)) != 0)
        {
            length++;
            _contentType = AMQShortString.readAMQShortString(input);
            if(_contentType != null)
            {
                length += _contentType.length();
            }
        }

        if ((_propertyFlags & ENCODING_MASK) != 0)
        {
            length++;
            _encoding = AMQShortString.readAMQShortString(input);
            if(_encoding != null)
            {
                length += _encoding.length();
            }
        }

        if ((_propertyFlags & HEADERS_MASK) != 0)
        {
            int fieldTableLength = input.getInt();

            _headers = new FieldTable(input, fieldTableLength);

            length += 4;
            length += fieldTableLength;
        }

        if ((_propertyFlags & DELIVERY_MODE_MASK) != 0)
        {
            _deliveryMode = input.get();
            length++;
        }

        if ((_propertyFlags & PRIORITY_MASK) != 0)
        {
            _priority = input.get();
            length++;
        }

        if ((_propertyFlags & CORRELATION_ID_MASK) != 0)
        {
            length++;
            _correlationId = AMQShortString.readAMQShortString(input);
            if(_correlationId != null)
            {
                length += _correlationId.length();
            }
        }

        if ((_propertyFlags & REPLY_TO_MASK) != 0)
        {
            length++;
            _replyTo = AMQShortString.readAMQShortString(input);
            if(_replyTo != null)
            {
                length += _replyTo.length();
            }
        }

        if ((_propertyFlags & EXPIRATION_MASK) != 0)
        {
            length++;
            AMQShortString expiration = AMQShortString.readAMQShortString(input);
            if(expiration != null)
            {
                length += expiration.length();
                _expiration = Long.parseLong(expiration.toString());
            }
        }

        if ((_propertyFlags & MESSAGE_ID_MASK) != 0)
        {
            length++;
            _messageId = AMQShortString.readAMQShortString(input);
            if(_messageId != null)
            {
                length += _messageId.length();
            }
        }

        if ((_propertyFlags & TIMESTAMP_MASK) != 0)
        {
            _timestamp = input.getLong();
            length += 8;
        }

        if ((_propertyFlags & TYPE_MASK) != 0)
        {
            length++;
            _type = AMQShortString.readAMQShortString(input);
            if(_type != null)
            {
                length += _type.length();
            }
        }

        if ((_propertyFlags & USER_ID_MASK) != 0)
        {
            length++;
            _userId = AMQShortString.readAMQShortString(input);
            if(_userId != null)
            {
                length += _userId.length();
            }
        }

        if ((_propertyFlags & APPLICATION_ID_MASK) != 0)
        {
            length++;
            _appId = AMQShortString.readAMQShortString(input);
            if(_appId != null)
            {
                length += _appId.length();
            }
        }

        if ((_propertyFlags & CLUSTER_ID_MASK) != 0)
        {
            length++;
            _clusterId = AMQShortString.readAMQShortString(input);
            if(_clusterId != null)
            {
                length += _clusterId.length();
            }
        }

        return length;
    }


    public synchronized long writePropertyListPayload(final ByteBufferSender sender)
    {
        if(useEncodedForm())
        {
            sender.send(_encodedForm.duplicate());
            return _encodedForm.remaining();
        }
        else
        {
            int propertyListSize = getPropertyListSize();
            ByteBuffer buf = ByteBuffer.allocate(propertyListSize);
            writePropertyListPayload(buf);
            buf.flip();
            sender.send(buf);
            return propertyListSize;
        }

    }

    public synchronized void populatePropertiesFromBuffer(ByteBuffer buffer, int propertyFlags, int size) throws AMQFrameDecodingException
    {
        _propertyFlags = propertyFlags;

        if (_logger.isDebugEnabled())
        {
            _logger.debug("Property flags: " + _propertyFlags);
        }
        _encodedForm = ByteBufferUtils.view(buffer, 0, size);

        decode(_encodedForm.slice());
        buffer.position(buffer.position()+size);

    }

    private void decode(ByteBuffer buffer) throws AMQFrameDecodingException
    {
        if ((_propertyFlags & (CONTENT_TYPE_MASK)) != 0)
        {
            _contentType = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & ENCODING_MASK) != 0)
        {
            _encoding = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & HEADERS_MASK) != 0)
        {
            long length = ByteBufferUtils.getUnsignedInt(buffer);

            ByteBuffer buf = ByteBufferUtils.view(buffer, 0, (int) length);
            _headers = new FieldTable(buf);
            buffer.position(buffer.position()+(int)length);
        }

        if ((_propertyFlags & DELIVERY_MODE_MASK) != 0)
        {
            _deliveryMode = buffer.get();
        }

        if ((_propertyFlags & PRIORITY_MASK) != 0)
        {
            _priority = buffer.get();
        }

        if ((_propertyFlags & CORRELATION_ID_MASK) != 0)
        {
            _correlationId = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & REPLY_TO_MASK) != 0)
        {
            _replyTo = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & EXPIRATION_MASK) != 0)
        {
            _expiration = EncodingUtils.readLongAsShortString(buffer);
        }

        if ((_propertyFlags & MESSAGE_ID_MASK) != 0)
        {
            _messageId = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & TIMESTAMP_MASK) != 0)
        {
            _timestamp = buffer.getLong();
        }

        if ((_propertyFlags & TYPE_MASK) != 0)
        {
            _type = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & USER_ID_MASK) != 0)
        {
            _userId = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & APPLICATION_ID_MASK) != 0)
        {
            _appId = AMQShortString.readAMQShortString(buffer);
        }

        if ((_propertyFlags & CLUSTER_ID_MASK) != 0)
        {
            _clusterId = AMQShortString.readAMQShortString(buffer);
        }

    }


    public AMQShortString getContentType()
    {
        return _contentType;
    }

    public String getContentTypeAsString()
    {
        return (_contentType == null) ? null : _contentType.toString();
    }

    public synchronized void setContentType(AMQShortString contentType)
    {

        if(contentType == null)
        {
            _propertyFlags &= (~CONTENT_TYPE_MASK);
        }
        else
        {
            _propertyFlags |= CONTENT_TYPE_MASK;
        }
        _contentType = contentType;
        nullEncodedForm();
    }

    public void setContentType(String contentType)
    {
        setContentType((contentType == null) ? null : AMQShortString.valueOf(contentType));
    }

    public String getEncodingAsString()
    {

        return (getEncoding() == null) ? null : getEncoding().toString();
    }

    public AMQShortString getEncoding()
    {
        return _encoding;
    }

    public void setEncoding(String encoding)
    {
        setEncoding(encoding == null ? null : AMQShortString.valueOf(encoding));
    }

    public synchronized void setEncoding(AMQShortString encoding)
    {
        if(encoding == null)
        {
            _propertyFlags &= (~ENCODING_MASK);
        }
        else
        {
            _propertyFlags |= ENCODING_MASK;
        }
        _encoding = encoding;
        nullEncodedForm();
    }

    public FieldTable getHeaders()
    {
        if (_headers == null)
        {
            setHeaders(FieldTableFactory.newFieldTable());
        }

        return _headers;
    }

    public synchronized void setHeaders(FieldTable headers)
    {
        if(headers == null)
        {
            _propertyFlags &= (~HEADERS_MASK);
        }
        else
        {
            _propertyFlags |= HEADERS_MASK;
        }
        _headers = headers;
        nullEncodedForm();
    }

    public byte getDeliveryMode()
    {
        return _deliveryMode;
    }

    public synchronized void setDeliveryMode(byte deliveryMode)
    {
        _propertyFlags |= DELIVERY_MODE_MASK;
        _deliveryMode = deliveryMode;
        nullEncodedForm();
    }

    public byte getPriority()
    {
        return _priority;
    }

    public synchronized void setPriority(byte priority)
    {
        _propertyFlags |= PRIORITY_MASK;
        _priority = priority;
        nullEncodedForm();
    }

    public AMQShortString getCorrelationId()
    {
        return _correlationId;
    }

    public String getCorrelationIdAsString()
    {
        return (_correlationId == null) ? null : _correlationId.toString();
    }

    public void setCorrelationId(String correlationId)
    {
        setCorrelationId((correlationId == null) ? null : AMQShortString.valueOf(correlationId));
    }

    public synchronized void setCorrelationId(AMQShortString correlationId)
    {
        if(correlationId == null)
        {
            _propertyFlags &= (~CORRELATION_ID_MASK);
        }
        else
        {
            _propertyFlags |= CORRELATION_ID_MASK;
        }
        _correlationId = correlationId;
        nullEncodedForm();
    }

    public String getReplyToAsString()
    {
        return (_replyTo == null) ? null : _replyTo.toString();
    }

    public AMQShortString getReplyTo()
    {
        return _replyTo;
    }

    public void setReplyTo(String replyTo)
    {
        setReplyTo((replyTo == null) ? null : AMQShortString.valueOf(replyTo));
    }

    public synchronized void setReplyTo(AMQShortString replyTo)
    {
        if(replyTo == null)
        {
            _propertyFlags &= (~REPLY_TO_MASK);
        }
        else
        {
            _propertyFlags |= REPLY_TO_MASK;
        }
        _replyTo = replyTo;
        nullEncodedForm();
    }

    public long getExpiration()
    {
        return _expiration;
    }

    public synchronized void setExpiration(long expiration)
    {
        if(expiration == 0l)
        {
            _propertyFlags &= (~EXPIRATION_MASK);
        }
        else
        {
            _propertyFlags |= EXPIRATION_MASK;
        }
        _expiration = expiration;
        nullEncodedForm();
    }

    public AMQShortString getMessageId()
    {
        return _messageId;
    }

    public String getMessageIdAsString()
    {
        return (_messageId == null) ? null : _messageId.toString();
    }

    public void setMessageId(String messageId)
    {
        setMessageId(messageId == null ? null : new AMQShortString(messageId));
    }

    public synchronized void setMessageId(AMQShortString messageId)
    {
        if(messageId == null)
        {
            _propertyFlags &= (~MESSAGE_ID_MASK);
        }
        else
        {
            _propertyFlags |= MESSAGE_ID_MASK;
        }
        _messageId = messageId;
        nullEncodedForm();
    }

    public long getTimestamp()
    {
        return _timestamp;
    }

    public synchronized void setTimestamp(long timestamp)
    {
        _propertyFlags |= TIMESTAMP_MASK;
        _timestamp = timestamp;
        nullEncodedForm();
    }

    public String getTypeAsString()
    {
        return (_type == null) ? null : _type.toString();
    }

    public AMQShortString getType()
    {
        return _type;
    }

    public void setType(String type)
    {
        setType((type == null) ? null : AMQShortString.valueOf(type));
    }

    public synchronized void setType(AMQShortString type)
    {
        if(type == null)
        {
            _propertyFlags &= (~TYPE_MASK);
        }
        else
        {
            _propertyFlags |= TYPE_MASK;
        }
        _type = type;
        nullEncodedForm();
    }

    public String getUserIdAsString()
    {
        return (_userId == null) ? null : _userId.toString();
    }

    public AMQShortString getUserId()
    {
        return _userId;
    }

    public void setUserId(String userId)
    {
        setUserId((userId == null) ? null : AMQShortString.valueOf(userId));
    }

    public synchronized void setUserId(AMQShortString userId)
    {
        if(userId == null)
        {
            _propertyFlags &= (~USER_ID_MASK);
        }
        else
        {
            _propertyFlags |= USER_ID_MASK;
        }
        _userId = userId;
        nullEncodedForm();
    }

    public String getAppIdAsString()
    {
        return (_appId == null) ? null : _appId.toString();
    }

    public AMQShortString getAppId()
    {
        return _appId;
    }

    public void setAppId(String appId)
    {
        setAppId((appId == null) ? null : AMQShortString.valueOf(appId));
    }

    public synchronized void setAppId(AMQShortString appId)
    {
        if(appId == null)
        {
            _propertyFlags &= (~APPLICATION_ID_MASK);
        }
        else
        {
            _propertyFlags |= APPLICATION_ID_MASK;
        }
        _appId = appId;
        nullEncodedForm();
    }

    public String getClusterIdAsString()
    {
        return (_clusterId == null) ? null : _clusterId.toString();
    }

    public AMQShortString getClusterId()
    {
        return _clusterId;
    }

    public void setClusterId(String clusterId)
    {
        setClusterId((clusterId == null) ? null : AMQShortString.valueOf(clusterId));
    }

    public synchronized void setClusterId(AMQShortString clusterId)
    {
        if(clusterId == null)
        {
            _propertyFlags &= (~CLUSTER_ID_MASK);
        }
        else
        {
            _propertyFlags |= CLUSTER_ID_MASK;
        }
        _clusterId = clusterId;
        nullEncodedForm();
    }

    @Override
    public String toString()
    {
        return "reply-to = " + _replyTo + ",propertyFlags = " + _propertyFlags + ",ApplicationID = " + _appId
            + ",ClusterID = " + _clusterId + ",UserId = " + _userId + ",JMSMessageID = " + _messageId
            + ",JMSCorrelationID = " + _correlationId + ",JMSDeliveryMode = " + _deliveryMode + ",JMSExpiration = "
            + _expiration + ",JMSPriority = " + _priority + ",JMSTimestamp = " + _timestamp + ",JMSType = " + _type
            + ",contentType = " + _contentType;
    }

    private synchronized boolean useEncodedForm()
    {
        return _encodedForm != null && (_headers == null || _headers.isClean());
    }


    public synchronized void dispose()
    {
        nullEncodedForm();
        if(_headers != null)
        {
            _headers.dispose();
        }
    }

    public synchronized void clearEncodedForm()
    {
        nullEncodedForm();
        if(_headers != null)
        {
            _headers.clearEncodedForm();
        }
    }

    private synchronized void nullEncodedForm()
    {
        if(_encodedForm != null)
        {
            _encodedForm = null;
        }
    }
}