/**
 * @file llagentpicksinfo.cpp
 * @brief LLAgentPicksInfo class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"
#include "llagentpicksinfo.h"

#include "llagent.h"
#include "llavatarpropertiesprocessor.h"

const S32 MAX_AVATAR_PICKS = 10;


class LLAgentPicksInfo::LLAgentPicksObserver : public LLAvatarPropertiesObserver
{
public:
    LLAgentPicksObserver()
    {
        LLAvatarPropertiesProcessor::getInstance()->addObserver(gAgent.getID(), this);
    }

    ~LLAgentPicksObserver()
    {
        if (LLAvatarPropertiesProcessor::instanceExists())
            LLAvatarPropertiesProcessor::getInstance()->removeObserver(gAgent.getID(), this);
    }

    void sendAgentPicksRequest()
    {
        LLAvatarPropertiesProcessor::getInstance()->sendAvatarPropertiesRequest(gAgent.getID());
    }

    typedef boost::function<void(LLAvatarData*)> server_respond_callback_t;

    void setServerRespondCallback(const server_respond_callback_t& cb)
    {
        mServerRespondCallback = cb;
    }

    virtual void processProperties(void* data, EAvatarProcessorType type)
    {
        if(APT_PROPERTIES == type)
        {
            LLAvatarData* picks = static_cast<LLAvatarData*>(data);
            if(picks && gAgent.getID() == picks->avatar_id)
            {
                if(mServerRespondCallback)
                {
                    mServerRespondCallback(picks);
                }
            }
        }
    }

private:

    server_respond_callback_t mServerRespondCallback;
};

//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////

LLAgentPicksInfo::LLAgentPicksInfo()
 : mAgentPicksObserver(NULL)
 , mMaxNumberOfPicks(MAX_AVATAR_PICKS)
 // Disable Pick creation until we get number of Picks from server - in case
 // avatar has maximum number of Picks.
 , mNumberOfPicks(mMaxNumberOfPicks)
{
}

LLAgentPicksInfo::~LLAgentPicksInfo()
{
    delete mAgentPicksObserver;
}

void LLAgentPicksInfo::requestNumberOfPicks()
{
    if(!mAgentPicksObserver)
    {
        mAgentPicksObserver = new LLAgentPicksObserver();

        mAgentPicksObserver->setServerRespondCallback(boost::bind(
            &LLAgentPicksInfo::onServerRespond, this, _1));
    }

    mAgentPicksObserver->sendAgentPicksRequest();
}

bool LLAgentPicksInfo::isPickLimitReached()
{
    return getNumberOfPicks() >= getMaxNumberOfPicks();
}

void LLAgentPicksInfo::onServerRespond(LLAvatarData* picks)
{
    if(!picks)
    {
        LL_ERRS() << "Unexpected value" << LL_ENDL;
        return;
    }

    setNumberOfPicks(static_cast<S32>(picks->picks_list.size()));
}