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#include "snag.h"

    // lifecycle

    /// set initial pool contents

    void setInitialState(const CNPool &young_labile_kg_ha, const CNPool &young_refractory_kg_ha, const CNPool &SOM_kg_ha) { mYL = young_labile_kg_ha*0.001; mYR = young_refractory_kg_ha*0.001; mSOM = SOM_kg_ha*0.001; }

    // actions

    void setSoilInput(const CNPool &labile_input_kg_ha, const CNPool &refractory_input_kg_ha); ///< provide values for input pools

    void setClimateFactor(const double climate_factor_re) { mRE = climate_factor_re; } ///< set the climate decomposition factor for the current year

    void calculate(); ///< main calculation function: calculates the update of state variables

    // access

    const CNPool &youngLabile() const { return mYL;} ///< young labile matter (t/ha)

    const CNPool &youngRefractory() const { return mYR;} ///< young refractory matter (t/ha)

    const CNPool &oldOrganicMatter() const { return mSOM;} ///< old matter (SOM) (t/ha)

    double availableNitrogen() const { return mAvailableNitrogen; } ///< return available Nitrogen (kg/ha*yr)

    QList<QVariant> debugList(); ///< return a debug output

private:

    // variables

    double mRE; ///< climate factor 're' (see Snag::calculateClimateFactors())

    double mAvailableNitrogen; ///< plant available nitrogen (kg/ha)

    CNPool mInputLab; ///< input pool labile matter (t/ha)

    CNPool mInputRef; ///< input pool refractory matter (t/ha)

    // state variables

    CNPool mYL; ///< C/N Pool for young labile matter (i.e. litter) (t/ha)

    CNPool mYR; ///< C/N Pool for young refractory matter (i.e. downed woody debris) (t/ha)

    CNPool mSOM; ///< C/N Pool for old matter (t/ha) (i.e. soil organic matter, SOM)