/*
 * 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.usergrid.mongo.protocol;


import java.io.IOException;
import java.nio.ByteBuffer;

import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.MessageEvent;
import org.apache.usergrid.mongo.MongoChannelHandler;


public class OpGetMore extends OpCrud {

    int numberToReturn;
    long cursorID;


    public OpGetMore() {
        opCode = OP_GET_MORE;
    }


    public int getNumberToReturn() {
        return numberToReturn;
    }


    public void setNumberToReturn( int numberToReturn ) {
        this.numberToReturn = numberToReturn;
    }


    public long getCursorID() {
        return cursorID;
    }


    public void setCursorID( long cursorID ) {
        this.cursorID = cursorID;
    }


    @Override
    public void decode( ChannelBuffer buffer ) throws IOException {
        super.decode( buffer );

        buffer.readInt();
        fullCollectionName = readCString( buffer );
        numberToReturn = buffer.readInt();
        cursorID = buffer.readLong();
    }


    @Override
    public ChannelBuffer encode( ChannelBuffer buffer ) {
        int l = 32; // 8 ints * 4 bytes

        ByteBuffer fullCollectionNameBytes = getCString( fullCollectionName );
        l += fullCollectionNameBytes.capacity();

        messageLength = l;

        buffer = super.encode( buffer );

        buffer.writeInt( 0 );

        buffer.writeBytes( fullCollectionNameBytes );

        buffer.writeInt( numberToReturn );

        buffer.writeLong( cursorID );

        return buffer;
    }


    /* (non-Javadoc)
     * @see org.apache.usergrid.mongo.protocol.OpCrud#doOp(org.apache.usergrid.mongo.MongoChannelHandler,
     * org.jboss.netty.channel.ChannelHandlerContext, org.jboss.netty.channel.MessageEvent)
     */
    @Override
    public OpReply doOp( MongoChannelHandler handler, ChannelHandlerContext ctx, MessageEvent messageEvent ) {
        return new OpReply( this );
    }


    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "OpGetMore [numberToReturn=" + numberToReturn + ", cursorID=" + cursorID + ", fullCollectionName="
                + fullCollectionName + ", messageLength=" + messageLength + ", requestID=" + requestID + ", responseTo="
                + responseTo + ", opCode=" + opCode + "]";
    }
}