// Copyright (c) 2013 by István Váradi

// This file is part of XPLRA, a remote-access plugin for X-Plane

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:

// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.

#ifndef XPLRA_SERVERTHREAD_H
#define XPLRA_SERVERTHREAD_H
//------------------------------------------------------------------------------

#include <hu/varadiistvan/scpl/Thread.h>

#include <hu/varadiistvan/scpl/io/Waiter.h>
#include <hu/varadiistvan/scpl/io/BufferedStream.h>
#include <hu/varadiistvan/scpl/io/DataStream.h>
#include <hu/varadiistvan/scpl/io/LocalAcceptor.h>

#include <hu/varadiistvan/scpl/Mutex.h>

#include <set>
#include <map>

//------------------------------------------------------------------------------

namespace xplra {

//------------------------------------------------------------------------------

class ListenThread;

class RequestQueue;

class GetMultiDataRefRequest;
class SetMultiDataRefRequest;

//------------------------------------------------------------------------------

/**
 * A thread serving a client.
 */
class ServerThread : public hu::varadiistvan::scpl::Thread
{
private:
    /**
     * Type for the set of server thread instances.
     */
    typedef std::set<ServerThread*> instances_t;

    /**
     * Type for the registered multiple-data query requests.
     */
    typedef std::map<size_t, GetMultiDataRefRequest*> getMultiRequests_t;

    /**
     * Type for the registered multiple-data update requests.
     */
    typedef std::map<size_t, SetMultiDataRefRequest*> setMultiRequests_t;

    /**
     * A mutex to protect the collection of server threads.
     */
    static hu::varadiistvan::scpl::Mutex instancesMutex;

    /**
     * The instances of this class.
     */
    static instances_t instances;

public:
    /**
     * Call quit() an all threads.
     */
    static void quitAll();

private:
    /**
     * The listen thread this server was started by.
     */
    ListenThread& listenThread;

    /**
     * The request queue to use.
     */
    RequestQueue& requestQueue;

    /**
     * Our waiter.
     */
    hu::varadiistvan::scpl::io::Waiter waiter;

    /**
     * The buffered stream to use for communication at the low-level.
     */
    hu::varadiistvan::scpl::io::BufferedStream* bufferedStream;

    /**
     * The data stream being used for communication.
     */
    hu::varadiistvan::scpl::io::DataStream stream;

    /**
     * The ID of the next multiple-data query request.
     */
    size_t nextGetMultiRequestID;

    /**
     * The registered multiple-data query requests.
     */
    getMultiRequests_t getMultiRequests;

    /**
     * The ID of the next multiple-data update request.
     */
    size_t nextSetMultiRequestID;

    /**
     * The registered multiple-data query requests.
     */
    setMultiRequests_t setMultiRequests;

public:
    /**
     * Construct the thread by using a LocalSocket returned by the
     * given acceptor.
     */
    ServerThread(ListenThread& listenThread, RequestQueue& requestQueue,
                 hu::varadiistvan::scpl::io::LocalAcceptor& acceptor);

    /**
     * Destroy the thread.
     */
    virtual ~ServerThread();

    /**
     * Quit the thread. It interrupts the blocking stream.
     */
    void quit();

    /**
     * Perform the thread's operation.
     */
    virtual void run();

private:
    /**
     * Handle the COMMAND_GET_SINGLE command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleGetSingle();

    /**
     * Handle the COMMAND_SET_SINGLE command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleSetSingle();

    /**
     * Handle the COMMAND_GET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleGetMulti();

    /**
     * Handle the COMMAND_SET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleSetMulti();

    /**
     * Handle the COMMAND_REGISTER_GET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleRegisterGetMulti();

    /**
     * Handle the COMMAND_UNREGISTER_GET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleUnregisterGetMulti();

    /**
     * Handle the COMMAND_EXECUTE_GET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleExecuteGetMulti();

    /**
     * Handle the COMMAND_REGISTER_SET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleRegisterSetMulti();

    /**
     * Handle the COMMAND_UNREGISTER_SET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleUnregisterSetMulti();

    /**
     * Handle the COMMAND_EXECUTE_SET_MULTI command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleExecuteSetMulti();

    /**
     * Handle the COMMAND_GET_VERSIONS command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleGetVersions();

    /**
     * Handle the COMMAND_SHOW_MESSAGE command
     *
     * @return true, if we can continue, false if the thread should quit
     */
    bool handleShowMessage();
};

//------------------------------------------------------------------------------

} /* namespace xplra */

//------------------------------------------------------------------------------
#endif // XPLRA_SERVERTHREAD_H

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