/*
 *
 * 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.
 *
 */
#ifndef _Connector_
#define _Connector_


#include "qpid/framing/InputHandler.h"
#include "qpid/framing/OutputHandler.h"
#include "qpid/framing/InitiationHandler.h"
#include "qpid/framing/ProtocolInitiation.h"
#include "qpid/framing/ProtocolVersion.h"
#include "qpid/sys/ShutdownHandler.h"
#include "qpid/sys/TimeoutHandler.h"
#include "qpid/sys/Thread.h"
#include "qpid/sys/Runnable.h"
#include "qpid/sys/Mutex.h"
#include "qpid/sys/Socket.h"
#include "qpid/sys/Time.h"

#include <queue>
#include <boost/weak_ptr.hpp>
#include <boost/shared_ptr.hpp>

namespace qpid {

namespace sys {
class Poller;
class AsynchIO;
class AsynchIOBufferBase;
}
	
namespace client {

class Bounds;
class ConnectionSettings;
class ConnectionImpl;

///@internal
class Connector : public framing::OutputHandler, 
                  private sys::Runnable
{
    struct Buff;

    /** Batch up frames for writing to aio. */
    class Writer : public framing::FrameHandler {
        typedef sys::AsynchIOBufferBase BufferBase;
        typedef std::vector<framing::AMQFrame> Frames;

        const uint16_t maxFrameSize;
        sys::Mutex lock;
        sys::AsynchIO* aio;
        BufferBase* buffer;
        Frames frames;
        size_t lastEof; // Position after last EOF in frames
        framing::Buffer encode;
        size_t framesEncoded;
        std::string identifier;
        Bounds* bounds;        
        
        void writeOne(const sys::Mutex::ScopedLock&);
        void newBuffer(const sys::Mutex::ScopedLock&);

      public:
        
        Writer(uint16_t maxFrameSize, Bounds*);
        ~Writer();
        void init(std::string id, sys::AsynchIO*);
        void handle(framing::AMQFrame&);
        void write(sys::AsynchIO&);
    };
    
    const uint16_t maxFrameSize;
    framing::ProtocolVersion version;
    bool initiated;

    sys::Mutex closedLock;    
    bool closed;
    bool joined;

    sys::AbsTime lastIn;
    sys::AbsTime lastOut;
    sys::Duration timeout;
    sys::Duration idleIn;
    sys::Duration idleOut;

    sys::TimeoutHandler* timeoutHandler;
    sys::ShutdownHandler* shutdownHandler;
    framing::InputHandler* input;
    framing::InitiationHandler* initialiser;
    framing::OutputHandler* output;

    Writer writer;
    
    sys::Thread receiver;

    sys::Socket socket;

    sys::AsynchIO* aio;
    boost::shared_ptr<sys::Poller> poller;

    void run();
    void handleClosed();
    bool closeInternal();
    
    void readbuff(qpid::sys::AsynchIO&, qpid::sys::AsynchIOBufferBase*);
    void writebuff(qpid::sys::AsynchIO&);
    void writeDataBlock(const framing::AMQDataBlock& data);
    void eof(qpid::sys::AsynchIO&);

    std::string identifier;

    ConnectionImpl* impl;
    
  public:
    Connector(framing::ProtocolVersion pVersion,
              const ConnectionSettings&, 
              ConnectionImpl*);
    virtual ~Connector();
    virtual void connect(const std::string& host, int port);
    virtual void init();
    virtual void close();
    virtual void setInputHandler(framing::InputHandler* handler);
    virtual void setShutdownHandler(sys::ShutdownHandler* handler);
    virtual sys::ShutdownHandler* getShutdownHandler() { return shutdownHandler; }
    virtual framing::OutputHandler* getOutputHandler();
    virtual void send(framing::AMQFrame& frame);
    const std::string& getIdentifier() const { return identifier; }
};

}}


#endif
