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/*! \file
 * \brief
 * Declares nblib ParticleTypes
 *
 * \author Victor Holanda <victor.holanda@cscs.ch>
 * \author Joe Jordan <ejjordan@kth.se>
 * \author Prashanth Kanduri <kanduri@cscs.ch>
 * \author Sebastian Keller <keller@cscs.ch>
 * \author Artem Zhmurov <zhmurov@gmail.com>
 *
 * \inpublicapi
 * \ingroup nblib
 */
#ifndef NBLIB_PARTICLETYPE_H
#define NBLIB_PARTICLETYPE_H

#include <string>

#include "nblib/util/util.hpp"
#include "nblib/basicdefinitions.h"

namespace nblib
{
class TopologyBuilder;

//! Named type for particle type name
using ParticleTypeName = StrongType<std::string, struct ParticleTypeNameParameter>;
//! Named type for particle mass
using Mass = StrongType<real, struct MassParameter>;

/*! \brief Class that represents the particle type.
 *
 * The particle type is used in lookup tables for masses, non-bonded parameters, etc.
 * Every particle has to assigned an atom type.
 */
class ParticleType final
{
public:
    /*! \brief Constructor with explicit name and mass specification.
     *
     * \param[in] name The unique name to reference the particle type.
     * \param[in] mass The mass of the particle of this type.
     */
    ParticleType(ParticleTypeName name, Mass mass);

    //! Get the type name
    [[nodiscard]] ParticleTypeName name() const;

    //! Get the mass
    [[nodiscard]] Mass mass() const;

private:
    //! The name
    ParticleTypeName name_;
    //! The mass
    Mass mass_;
};

/*! \brief Comparison operator
 *
 * \param[in] a First type.
 * \param[in] b Second type.
 * \returns If the types are identical.
 */
bool operator==(const ParticleType& a, const ParticleType& b);

} // namespace nblib
#endif // NBLIB_PARTICLETYPE_H
