/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2015                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
 * software and associated documentation files (the "Software"), to deal in the Software *
 * without restriction, including without limitation the rights to use, copy, modify,    *
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
 * permit persons to whom the Software is furnished to do so, subject to the following   *
 * conditions:                                                                           *
 *                                                                                       *
 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
 ****************************************************************************************/

#ifndef __RenderableFov_H__
#define __RenderableFov_H__

// open space includes
#include <openspace/rendering/renderable.h>

#include <openspace/properties/stringproperty.h>
#include <openspace/query/query.h>

// ghoul includes
#include <ghoul/opengl/programobject.h>
#include <ghoul/opengl/texture.h>
//#include <openspace/util/runtimedata.h>
#include <openspace/util/powerscaledcoordinate.h>

namespace openspace {
class RenderableFov : public Renderable{
public:
	RenderableFov(const ghoul::Dictionary& dictionary);
	~RenderableFov();

	bool initialize() override;
	bool deinitialize() override;

	bool isReady() const override;

	void render(const RenderData& data) override;
	void update(const UpdateData& data) override;

 private:
    properties::FloatProperty _lineWidth;
	properties::BoolProperty _drawSolid;
	ghoul::opengl::ProgramObject* _programObject;
	ghoul::opengl::Texture* _texture;
	openspace::SceneGraphNode* _targetNode;

	void loadTexture();
	void allocateData();
	void insertPoint(std::vector<float>& arr, psc p, glm::vec4 c);
	void fovProjection(bool H[], std::vector<glm::dvec3> bounds);

	psc orthogonalProjection(glm::dvec3 camvec);
	psc checkForIntercept(glm::dvec3 ray);
	psc pscInterpolate(psc p0, psc p1, float t);
	psc sphericalInterpolate(glm::dvec3 p0, glm::dvec3 p1, float t);
	
	glm::dvec3 interpolate(glm::dvec3 p0, glm::dvec3 p1, float t);
	glm::dvec3 bisection(glm::dvec3 p1, glm::dvec3 p2, double tolerance);

	void computeColors();

	// instance variables
	int _nrInserted = 0;
	int _isteps;
	bool _rebuild = false;
	bool _interceptTag[9];
	bool _withinFOV;
	psc _projectionBounds[8];
	psc _interceptVector;

	// spice
	std::string _spacecraft;
	std::string _observer;
	std::string _frame;
	std::string _instrumentID;
	std::string _method;
	std::string _aberrationCorrection;
	std::string _fovTarget;
    std::vector<std::string> _potentialTargets;

	glm::dvec3 ipoint, ivec;
	glm::dvec3 _previousHalf;
	glm::vec3 _c; 
	double _r, _g, _b;

	// GPU stuff
	GLuint _vaoID[2] ;
	GLuint _vboID[2] ;
	GLuint _iboID[2];
	GLenum _mode;
	unsigned int _isize[2];
	unsigned int _vsize[2];
	unsigned int _vtotal[2];
	unsigned int _stride[2];
	std::vector<float> _varray1;
	std::vector<float> _varray2;
	int* _iarray1[2];

	void updateData();
	void sendToGPU();

	glm::dmat3 _stateMatrix;

	// time
	double _time = 0;
	double _oldTime = 0;

	// capturetime
	double _timeInterval;
	double _nextCaptureTime;
};
}
#endif