/*****************************************************************************************
 *                                                                                       *
 * 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 KAMELEONWRAPPER_H_
#define KAMELEONWRAPPER_H_

#include <glm/gtx/std_based_type.hpp>

#include <tuple>
#include <string>
#include <vector>

namespace ccmc {
    class Kameleon;
    class Model;
    class Interpolator;
}

namespace openspace {

struct LinePoint {
	glm::vec3 position;
	glm::vec4 color;

	LinePoint(glm::vec3 pos, glm::vec4 col) {
		position = pos;
		color = col;
	}
};

class KameleonWrapper {
public:

	enum class Model {
        OpenGGCM,
        BATSRUS,		// Magnetosphere
        ENLIL,			// Heliosphere
        MAS,
        Adapt3D,
        SWMF,
        LFM,
        Unknown
	};

	enum class TraceDirection {
		FORWARD = 1,
		BACK 	= -1
	};

	enum class FieldlineEnd {
		NORTH,
		SOUTH,
		FAROUT
	};
    
    enum class GridType {
        Cartesian,
        Spherical,
        Unknown
	};

	typedef std::vector<std::vector<LinePoint> > Fieldlines;

	KameleonWrapper();
	KameleonWrapper(const std::string& filename);
	~KameleonWrapper();

	bool open(const std::string& filename);
	void close();

	float* getUniformSampledValues(
		const std::string& var, 
		const glm::size3_t& outDimensions);

	float* getUniformSampledVectorValues(
		const std::string& xVar, 
		const std::string& yVar,
		const std::string& zVar, 
		const glm::size3_t& outDimensions);

	Fieldlines getClassifiedFieldLines(
		const std::string& xVar,
		const std::string& yVar, 
		const std::string& zVar,
		const std::vector<glm::vec3>& seedPoints, 
		float stepSize);

	Fieldlines getFieldLines(
		const std::string& xVar,
		const std::string& yVar, 
		const std::string& zVar,
		const std::vector<glm::vec3>& seedPoints, 
		float stepSize, 
		const glm::vec4& color);

	Fieldlines getLorentzTrajectories(
		const std::vector<glm::vec3>& seedPoints,
		const glm::vec4& color, 
		float stepsize);

	glm::vec3 getModelBarycenterOffset();
	glm::vec3 getModelScale();
	glm::vec3 getGridMax();
	glm::vec3 getGridMin();
	std::string getVariableUnit(const std::string& variable);

	std::tuple < std::string, std::string, std::string > getGridUnits();

	Model model();
	GridType gridType();

private:
	typedef std::vector<glm::vec3> TraceLine;
	TraceLine traceCartesianFieldline(
		const std::string& xVar,
		const std::string& yVar,
		const std::string& zVar, 
		const glm::vec3& seedPoint,
		float stepSize, 
		TraceDirection direction, 
		FieldlineEnd& end);

	TraceLine traceLorentzTrajectory(
		const glm::vec3& seedPoint,
		float stepsize, 
		float eCharge);
    
    void getGridVariables(std::string& x, std::string& y, std::string& z);
    GridType getGridType(
		const std::string& x, 
		const std::string& y, 
		const std::string& z);
    Model getModelType();
	glm::vec4 classifyFieldline(FieldlineEnd fEnd, FieldlineEnd bEnd);

    ccmc::Kameleon* _kameleon;
	ccmc::Model* _model;
    Model _type;
	ccmc::Interpolator* _interpolator;

	// Model parameters
	float _xMin, _xMax, _yMin, _yMax, _zMin, _zMax;
	float _xValidMin, _xValidMax, _yValidMin, _yValidMax, _zValidMin, _zValidMax;
	std::string _xCoordVar, _yCoordVar, _zCoordVar;
    GridType _gridType;
};

} // namespace openspace

#endif // KAMELEONWRAPPER_H_