/*
    Object Viewer Qt
    Copyright (C) 2010 Dzmitry Kamiahin <dnk-88@tut.by>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef ENTITY_H
#define ENTITY_H

#include <nel/misc/types_nl.h>

// STL includes
#include <map>
#include <string>
#include <vector>

// NeL includes
#include <nel/misc/vector.h>
#include <nel/misc/vectord.h>
#include <nel/misc/quat.h>
#include <nel/3d/animation_time.h>
#include <nel/3d/u_instance.h>
#include <nel/3d/u_skeleton.h>
#include <nel/3d/channel_mixer.h>

namespace NL3D {
	class UPlayList;
	class UAnimationSet;
}

namespace NLQT {
  
class CSlotInfo
{
public:
	CSlotInfo ():
		Animation("empty"), Skeleton("empty"),
		Offset(0), StartTime(0), EndTime(0),
		StartBlend(1),	EndBlend (1), Smoothness(1),
		SpeedFactor(1),	ClampMode(0),
		SkeletonInverted(false), 
		Enable(true)	{} ;

	std::string		Animation;
	std::string		Skeleton;
	float			Offset;
	float			StartTime;
	float			EndTime;

	float			StartBlend;
	float			EndBlend;
	float			Smoothness;
	float			SpeedFactor;
	sint32			ClampMode;
	bool			SkeletonInverted;
	bool			Enable;
	
	CSlotInfo &operator=(const CSlotInfo &);
};

	
/**
@class CEntity
@brief Class manage animated shape.
@details
Allows you to load animations for shape and skeleton weight. 
Contains a built-in playlist. Has management and playback Playlists or Mixer.
*/
class CEntity
{
public:
	struct Mode
	{
		enum List
		{
			PlayList = 1,
			Mixer
		};
	};

	/// Will need for a single or multiple animation shape
	struct SAnimationStatus
	{
		bool	LoopAnim;
		bool	PlayAnim;
		float	CurrentTimeAnim;
		float	StartAnim;
		float	EndAnim;
		float	SpeedAnim;
		int	Mode;
		
		SAnimationStatus():
			LoopAnim(false), PlayAnim(false),
			CurrentTimeAnim(0), StartAnim(0),
			EndAnim(0), SpeedAnim(1), Mode(Mode::PlayList) {}
	};
 
	/// Destructor
	~CEntity(void);

	/// Loads a file animations
	/// @param fileName - name animation file
	void loadAnimation(std::string &fileName);
	
	/// Loads a file skeleton weight
	void loadSWT(std::string &fileName);
	
	/// Adds an animation to a playlist
	/// @param name - name loaded animations
	void addAnimToPlayList(std::string &name);
	
	/// Removes the animation from a playlist
	/// @param row - number of animations in the playlist
	void removeAnimToPlayList(uint row);
	
	/// Swaps animations to a playlist
	/// @param row1 - first number of animations in the playlist
	/// @param row2 - second number of animations in the playlist
	void swapAnimToPlayList(uint row1, uint row2); 
	
	/// Playback animation 
	void playbackAnim(bool play);
	
	/// Reset playlist and animation
	void reset();
	
	/// Get the total time of animation playlist
	/// @return total time of animation
	float getPlayListLength();
	
	/// get time length single animation
	float getAnimLength(std::string name);
	
	/// Get slot infomation
	void setSlotInfo(uint num, CSlotInfo& slotInfo) { _SlotInfo[num] = slotInfo; }

	/// Set use mode playlist or mixer
	void setMode(int mode) { _AnimationStatus.Mode = mode; }

	/// Set in place mode animation
	void setInPlace(bool enabled) { _inPlace = enabled; }

	/// Get in place mode
	bool getInPlace() { return _inPlace; }

	/// Set inc position
	void setIncPos(bool enabled) { _incPos = enabled; }

	/// Get inc position
	bool getIncPos() { return _incPos; }

	/// Get information about the current status of playing a playlist
	/// @return struct containing current information playback
	SAnimationStatus getStatus() { return _AnimationStatus; }

	/// Get name entity
	/// @return name entity
	std::string getName() { return _Name; }
	
	/// Get file name shape
	/// @return file name shape
	std::string getFileNameShape() { return _FileNameShape; }
	
	/// Get file name skeleton
	/// @return file name skeleton
	std::string getFileNameSkeleton() { return _FileNameSkeleton; }
	
	/// Get slot information
	CSlotInfo getSlotInfo(uint num) { return _SlotInfo[num]; }

	/// Get list loaded animations files
	std::vector<std::string>& getAnimationList() { return _AnimationList; }

	/// Get playlist animations
	std::vector<std::string>& getPlayListAnimation() { return _PlayListAnimation; }

	/// Get list loaded skeleton weight template files
	std::vector<std::string>& getSWTList() { return _SWTList; }
	
	/// Get game interface for manipulating Skeleton.
	NL3D::USkeleton getSkeleton() const { return _Skeleton; }
	
private:
  	/// Constructor
	CEntity(void);

	/// Update the animate from the playlist or channel mixer
	/// @param time - current time in second
	void update(NL3D::TAnimationTime time);
	
	void resetChannel();
	
	/// Update the animate from the playlist
	void animatePlayList(NL3D::TAnimationTime time);

	/// Update the animate from the mixer
	void animateChannelMixer();
	void addTransformation (NLMISC::CMatrix &current, NL3D::UAnimation *anim, 
				float begin, float end, 
				NL3D::UTrack *posTrack, NL3D::UTrack *rotquatTrack, 
				NL3D::UTrack *nextPosTrack, NL3D::UTrack *nextRotquatTrack, 
				bool removeLast);

	// The name of the entity
	std::string			_Name;
	std::string			_FileNameShape;
	std::string			_FileNameSkeleton;
	
	SAnimationStatus		_AnimationStatus;

	bool 				_inPlace;
	bool 				_incPos;
	
	float 				_CharacterScalePos;
	
	// The mesh instance associated to this entity
	NL3D::UInstance			_Instance;

	// The skeleton binded to the instance
	NL3D::USkeleton			_Skeleton;

	NL3D::UPlayList			*_PlayList;

	NL3D::UAnimationSet		*_AnimationSet;

	// Animation input file
	std::vector<std::string>	_AnimationList;
	
	// Skeleton weight input file
	std::vector<std::string>	_SWTList;
	
	// Play list animation
	std::vector<std::string >	_PlayListAnimation;
		
	// Slot info for this object
	CSlotInfo			_SlotInfo[NL3D::CChannelMixer::NumAnimationSlot];

	friend class CObjectViewer;
}; /* class CEntity */

typedef std::map<std::string, CEntity>	CEntities;
typedef CEntities::iterator		EIT;

} /* namespace NLQT */

#endif // ENTITY_H