/**
 * @file   llavatarrendernotifier.h
 * @author andreykproductengine
 * @date   2015-08-05
 * @brief  
 * 
 * $LicenseInfo:firstyear=2013&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2013, 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
 * $/LicenseInfo$
 */

#if ! defined(LL_llavatarrendernotifier_H)
#define LL_llavatarrendernotifier_H

#include "llnotificationptr.h"

class LLViewerRegion;

// Class to notify user about drastic changes in agent's render weights or if other agents
// reported that user's agent is too 'heavy' for their settings
class LLAvatarRenderNotifier : public LLSingleton<LLAvatarRenderNotifier>
{
public:
	LLAvatarRenderNotifier();

    void displayNotification(bool show_over_limit);
	bool isNotificationVisible();

	void updateNotificationRegion(U32 agentcount, U32 overLimit);
    void updateNotificationState();
	void updateNotificationAgent(U32 agentComplexity);

// [SL:KB] - Patch: Appearance-Complexity | Checked: Catznip-4.1
	typedef boost::signals2::signal<void(U32, U32)> complexity_changed_signal_t;
	boost::signals2::connection addComplexityChangedCallback(const complexity_changed_signal_t::slot_type& cb) { return mComplexityChangedSignal.connect(cb); }
	void                        notifyComplexityChanged(U32 oldScore, U32 newScore) { mComplexityChangedSignal(oldScore, newScore); }
	void                        removeComplexityChangedCallback(boost::signals2::connection callback) { mComplexityChangedSignal.disconnect(callback); }

	typedef boost::signals2::signal<void(U32, U32)> visibility_changed_signal_t;
	boost::signals2::connection addVisibilityChangedCallback(const visibility_changed_signal_t::slot_type& cb) { return mVisibilityChangedSignal.connect(cb); }
	void                        notifyVisibilityChanged(U32 overLimitAgents, U32 countAgents) { mVisibilityChangedSignal(overLimitAgents, countAgents); }
	void                        removeVisibilityChangedCallback(boost::signals2::connection callback) { mVisibilityChangedSignal.disconnect(callback); }

	U32                         getLatestOverLimitAgents() const { return mLatestOverLimitAgents; }
	U32                         getLatestAgentsCount() const { return mLatestAgentsCount; }
	F32                         getLatestOverLimitPct() const { return mLatestOverLimitPct; }
protected:
	complexity_changed_signal_t mComplexityChangedSignal;
	visibility_changed_signal_t mVisibilityChangedSignal;
// [/SL:KB]

private:

	LLNotificationPtr mNotificationPtr;

	// to prevent notification from popping up too often, show it only
	// if certain amount of time passed since previous notification
	LLFrameTimer mPopUpDelayTimer;

	// values since last notification for comparison purposes
	U32 mAgentsCount;
	U32 mOverLimitAgents;
	U32 mAgentComplexity;
	F32 mOverLimitPct;

	// last reported values
	U32 mLatestAgentsCount;
	U32 mLatestOverLimitAgents;
	U32 mLatestAgentComplexity;
	F32 mLatestOverLimitPct;

	bool mShowOverLimitAgents;
    std::string overLimitMessage();

    // initial outfit related variables (state control)
    bool mNotifyOutfitLoading;

    // COF (inventory folder) and Skeleton (voavatar) are used to spot changes in outfit.
    S32 mLastCofVersion;
    S32 mLastSkeletonSerialNum;
    // Used to detect changes in voavatar's rezzed status.
    // If value decreases - there were changes in outfit.
    S32 mLastOutfitRezStatus;
};

#endif /* ! defined(LL_llavatarrendernotifier_H) */
