/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2023                                                               *
 *                                                                                       *
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 * 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:                                                                           *
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 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
 *                                                                                       *
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 ****************************************************************************************/

#ifndef __OPENSPACE_MODULE_SPACE___KEPLER___H__
#define __OPENSPACE_MODULE_SPACE___KEPLER___H__

#include <filesystem>
#include <string>
#include <vector>

namespace openspace::kepler {

struct Parameters {
    // Some human-readable name for the object represented by this kepler parameter set
    std::string name;

    // Some form of unique identifier for the object represented by this data
    std::string id;

    double inclination = 0.0;
    double semiMajorAxis = 0.0;
    double ascendingNode = 0.0;
    double eccentricity = 0.0;
    double argumentOfPeriapsis = 0.0;
    double meanAnomaly = 0.0;
    double epoch = 0.0;
    double period = 0.0;
};

/**
 * Reads the object information from the provided \p file and returns them as individual
 * values.
 *
 * \param file The file to the TLE file. This file must be a valid file
 * \return Information about all of the contained objects in the \p file
 *
 * \pre \p file must be a file and must exist
 * \throw ghoul::RuntimeError If the provided \p file is not a valid TLE file
 */
std::vector<Parameters> readTleFile(std::filesystem::path file);

/**
 * Reads the object information from the provided \p file and returns them as individual
 * values.
 *
 * \param file The file to the OMM file. This file must be a valid file
 * \return Information about all of the contained objects in the \p file
 *
 * \pre \p file must be a file and must exist
 * \throw ghoul::RuntimeError If the provided \p file is not a valid OMM file
 */
std::vector<Parameters> readOmmFile(std::filesystem::path file);

/**
 * Reads the object information from a CSV file following JPL's Small Body Database
 * format, which provides the Epoch, eccentricity, semi-major axis (in AU), inclination,
 * ascending node, argument of periapsis, mean anomaly, and period in that order.
 *
 * \param file The CSV file containing the information about the objects
 * \return Information about all of the contained objects in the \p file
 *
 * \pre \p file must be a file and must exist
 * \throw ghoul::RuntimeError If the provided \p is not a valid JPL SBDB CSV format
 */
std::vector<Parameters> readSbdbFile(std::filesystem::path file);

/**
 * The different formats that the readFile function is capable of loading
 */
enum class Format {
    TLE,
    OMM,
    SBDB
};
/**
 * Reads the object information from the provided file.
 *
 * \param file The file containing the information about the objects
 * \param format The format of the provided \p file
 * \return Information about all of the contained objects in the \p file
 *
 * \pre \p file must be a file and must exist
 * \throw ghoul::RuntimeError If the provided \p is not in the provided file
 */
std::vector<Parameters> readFile(std::filesystem::path file, Format format);

} // namespace openspace::kepler

#endif // __OPENSPACE_MODULE_SPACE___KEPLER___H__
