/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2016                                                               *
 *                                                                                       *
 * 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 __RENDERABLEPATH_H__
#define __RENDERABLEPATH_H__

#include <openspace/rendering/renderable.h>
#include <openspace/properties/stringproperty.h>
#include <openspace/properties/vectorproperty.h>

#include <ghoul/opengl/ghoul_gl.h>

namespace ghoul {
	namespace opengl {
		class ProgramObject;
		class Texture;
	}
}

namespace openspace {

class RenderablePath : public Renderable {
public:
	RenderablePath(const ghoul::Dictionary& dictionary);

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

	bool isReady() const override;

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

	void calculatePath(std::string observer);
private:
	struct VertexInfo {
		float x, y, z, e;
		//float r, g, b, a;
	};
	void sendToGPU();
	void addPosition(psc pos);
	void addColor(glm::vec4 col);

	glm::vec3 _lineColor;
	glm::vec4 _lastPosition;
	properties::FloatProperty _lineFade;
	properties::FloatProperty _lineWidth;
	properties::BoolProperty _drawLine;

	std::unique_ptr<ghoul::opengl::ProgramObject> _programObject;

	bool _successfullDictionaryFetch;

	std::string _target;
	std::string _observer;
	std::string _frame;

	GLuint _vaoID;
	GLuint _vBufferID;
		
	bool _needsSweep;

	std::vector<VertexInfo> _vertexArray;
		
	float _increment;
	double _start;
	double _stop;
	float _distanceFade;
};

} // namespace openspace

#endif // __RENDERABLEPATH_H__