#pragma once

/**
 * @file relations.hpp
 * @author Emily M. Boudreaux
 *
 * @brief File containing the thermodynamic relations used in the eos module. These relations are used to compute various thermodynamic quantities from other quantities.
 */

#include "serif/eos/relations/catalog.hpp"
#include "serif/dimensions/dimensions.hpp"

namespace serif::eos::relations {
    using PressureFromDensity = Relation<dimensions::Pressure, dimensions::MassDensity>; ///< A relation to compute pressure from density.
    using DensityFromPressure = Relation<dimensions::MassDensity, dimensions::Pressure>; ///< A relation to compute density at a prescribed pressure.
    /**
     * @brief Evaluate A(density), whose derivative on the positive barotropic branch is (dP/density)/density.
     *
     * An additive constant is arbitrary. A finite surface value is required when a consumer
     * subtracts A at a prescribed pressure. This mechanical primitive need not be thermodynamic enthalpy.
     */
    using PressurePotentialFromDensity = Relation<dimensions::BarotropicPressurePotential, dimensions::MassDensity>;
    using PressureFromSpecificEnthalpy = Relation<dimensions::Pressure, dimensions::SpecificEnthalpy>; ///< A relation to compute pressure from specific enthalpy.
    using SpecificEnthalpyFromDensity = Relation<dimensions::SpecificEnthalpy, dimensions::MassDensity>; ///< A relation to compute specific enthalpy from density.
    using SpecificEnthalpyFromPressure = Relation<dimensions::SpecificEnthalpy, dimensions::Pressure>; ///< A relation to compute specific enthalpy from pressure.
    using DensityFromSpecificEnthalpy = Relation<dimensions::MassDensity, dimensions::SpecificEnthalpy>; ///< A relation to compute density from specific enthalpy.
}