using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BaseCellSimulation.Enzyms.Membrane
{
    // ----------------------------------------------------------
    // 3. PMCA – Ca²⁺-ATPase (Ca raus, ATP-abhängig)
    // ----------------------------------------------------------
    public class PMCA : MembranEnzyme
    {
        public double ATPperCycle = 1.0;

        public override void ComputeRate(double caCyt, EnviromentState env)
        {
            // klassisch: Michaelis-Menten mit Ca²⁺-Abhängigkeit
            rate = Michaelis_Menten(caCyt, Vmax, Km);
        }

        public override void ApplyChanges(CellRessources res, double dt)
        {
            double flux = rate * dt;
            double atpNeeded = flux * ATPperCycle;

            if (res.Res.Energy.ATP < atpNeeded) flux *= res.Res.Energy.ATP / atpNeeded;

            res.Res.Ca.CytosolicCa -= flux;    // Ca raus
            res.Env.Ca += flux;
            res.ConsumeATP(atpNeeded);
        }

        public override double CalculateGradient(CellRessources res)
        {
            return res.Res.Ca.CytosolicCa; // PMCA is not driven by a concentration gradient
        }
    }
}