/*
 *
 * Copyright (c) 2006 The Apache Software Foundation
 *
 * Licensed 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.codec;

import org.apache.qpid.framing.*;
import org.apache.mina.common.*;
import org.apache.mina.common.support.BaseIoSession;
import org.apache.mina.filter.codec.ProtocolDecoderOutput;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;

import java.net.SocketAddress;

/**
 */
public class BasicDeliverTest
{
    public static void main(String[] argv) throws Exception
    {
        BasicDeliverTest test = new BasicDeliverTest();

        //warm up:
        test.encode(512, 100000);

        //real tests:
        test.encode(16, 10000, 15);
        test.encode(32, 10000, 15);
        test.encode(64, 10000, 15);
        test.encode(128, 10000, 15);
        test.encode(256, 10000, 15);
        test.encode(512, 10000, 15);
        test.encode(1024, 10000, 15);
        test.encode(2048, 10000, 15);

        test.decode(16, 10000, 15);
        test.decode(32, 10000, 15);
        test.decode(64, 10000, 15);
        test.decode(128, 10000, 15);
        test.decode(256, 10000, 15);
        test.decode(512, 10000, 15);
        test.decode(1024, 10000, 15);
        test.decode(2048, 10000, 15);
    }

    void decode(int size, int count, int iterations) throws Exception
    {
        long min = Long.MAX_VALUE;
        long max = 0;
        long total = 0;
        for(int i = 0; i < iterations; i++)
        {
            long time = decode(size, count);
            total += time;
            if(time < min) min = time;
            if(time > max) max = time;
        }
        System.out.println("Decoded " + count + " messages of " + size +
                " bytes: avg=" + (total / iterations) + ", min=" + min + ", max=" + max) ;
    }


    long decode(int size, int count) throws Exception
    {
        AMQDataBlock block = getDataBlock(size);
        ByteBuffer data = ByteBuffer.allocate((int) block.getSize()); // XXX: Is cast a problem?
        block.writePayload(data);
        data.flip();
        AMQDecoder decoder = new AMQDecoder(false);
        long start = System.currentTimeMillis();
        for(int i = 0; i < count; i++)
        {
            decoder.decode(session, data, decoderOutput);
            data.rewind();
        }
        return System.currentTimeMillis() - start;
    }

    void encode(int size, int count, int iterations) throws Exception
    {
        long min = Long.MAX_VALUE;
        long max = 0;
        long total = 0;
        for(int i = 0; i < iterations; i++)
        {
            long time = encode(size, count);
            total += time;
            if(time < min) min = time;
            if(time > max) max = time;
        }
        System.out.println("Encoded " + count + " messages of " + size +
                " bytes: avg=" + (total / iterations) + ", min=" + min + ", max=" + max) ;
    }

    long encode(int size, int count) throws Exception
    {
        IoSession session = null;
        AMQDataBlock block = getDataBlock(size);
        AMQEncoder encoder = new AMQEncoder();
        long start = System.currentTimeMillis();
        for(int i = 0; i < count; i++)
        {
            encoder.encode(session, block, encoderOutput);
        }
        return System.currentTimeMillis() - start;
    }

    private final ProtocolEncoderOutput encoderOutput = new ProtocolEncoderOutput(){

        public void write(ByteBuffer byteBuffer)
        {
        }

        public void mergeAll()
        {
        }

        public WriteFuture flush()
        {
            return null;
        }
    };

    private final ProtocolDecoderOutput decoderOutput = new ProtocolDecoderOutput(){
        public void write(Object object)
        {
        }

        public void flush()
        {
        }
    };

    private final IoSession session = new BaseIoSession(){

        protected void updateTrafficMask()
        {
            //To change body of implemented methods use File | Settings | File Templates.
        }

        public IoService getService()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public IoHandler getHandler()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public IoSessionConfig getConfig()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public IoFilterChain getFilterChain()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public TransportType getTransportType()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public SocketAddress getRemoteAddress()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public SocketAddress getLocalAddress()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public SocketAddress getServiceAddress()
        {
            return null;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public int getScheduledWriteRequests()
        {
            return 0;  //To change body of implemented methods use File | Settings | File Templates.
        }

        public int getScheduledWriteBytes()
        {
            return 0;  //To change body of implemented methods use File | Settings | File Templates.
        }
    };

    private static final char[] DATA = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();

    static CompositeAMQDataBlock getDataBlock(int size)
    {
        //create a frame representing message delivery
        AMQFrame[] frames = new AMQFrame[3];
        frames[0] = wrapBody( createBasicDeliverBody() );
        frames[1] = wrapBody( createContentHeaderBody() );
        frames[2] = wrapBody( createContentBody(size) );

        return new CompositeAMQDataBlock(frames);
    }

    static AMQFrame wrapBody(AMQBody body)
    {
        AMQFrame frame = new AMQFrame();
        frame.bodyFrame = body;
        frame.channel = 1;

        return frame;
    }

    static ContentBody createContentBody(int size)
    {
        ContentBody body = new ContentBody();
        body.payload = ByteBuffer.allocate(size);
        for(int i = 0; i < size; i++)
        {
            body.payload.put((byte) DATA[i % DATA.length]);
        }
        return body;
    }

    static ContentHeaderBody createContentHeaderBody()
    {
        ContentHeaderBody body = new ContentHeaderBody();
        body.properties = new BasicContentHeaderProperties();
        body.weight = 1;
        body.classId = 6;
        return body;
    }

    static BasicDeliverBody createBasicDeliverBody()
    {
        BasicDeliverBody body = new BasicDeliverBody();
        body.consumerTag = "myConsumerTag";
        body.deliveryTag = 1;
        body.exchange = "myExchange";
        body.redelivered = false;
        body.routingKey = "myRoutingKey";
        return body;
    }
}
