/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 GRIM_ANIMATIONEMI_H
#define GRIM_ANIMATIONEMI_H

#include "common/str.h"

#include "math/mathfwd.h"
#include "math/quat.h"

#include "engines/grim/animation.h"
#include "engines/grim/object.h"
#include "engines/grim/emi/skeleton.h"

namespace Grim {

struct AnimRotation {
	Math::Quaternion _quat;
	float _time;
};

struct AnimTranslation {
	Math::Vector3d _vec;
	float _time;
};

struct Bone {
	Common::String _boneName;
	int _operation;
	int _priority;
	int _c;
	int _count;
	AnimRotation *_rotations;
	AnimTranslation *_translations;
	Joint *_target;
	Bone() : _rotations(NULL), _translations(NULL), _boneName(""), _operation(0), _target(NULL) {}
	~Bone();
	void loadBinary(Common::SeekableReadStream *data);
};

class AnimationEmi : public Object {
	void loadAnimation(Common::SeekableReadStream *data);
public:
	Common::String _name;
	Common::String _fname;
	float _duration;
	int _numBones;
	Bone *_bones;
	AnimationEmi(const Common::String &filename, Common::SeekableReadStream *data);
	~AnimationEmi();

	const Common::String &getFilename() const { return _fname; }
};

class AnimationStateEmi {
public:
	AnimationStateEmi(const Common::String &anim);
	~AnimationStateEmi();

	void update(uint time);
	void computeWeights();
	void animate();
	void play();
	void stop();
	void setPaused(bool paused);
	void setLooping(bool loop);
	void setSkeleton(Skeleton *skel);
	void fade(Animation::FadeMode mode, int fadeLength);
	void advance(uint msecs);
	void saveState(SaveGame *state);
	void restoreState(SaveGame *state);

private:
	void activate();
	void deactivate();

	friend class Skeleton;

	Skeleton *_skel;
	ObjectPtr<AnimationEmi> _anim;
	bool _looping;
	bool _active;
	bool _paused;
	int _time;
	float _fade;
	float _startFade;
	Animation::FadeMode _fadeMode;
	int _fadeLength;
	int *_boneJoints;
};

} // end of namespace Grim

#endif