using System;

namespace Science.Physics.GeneralPhysics
{
	/// <summary>
	/// Entrope
	/// </summary>
	public class Entropy : Scalar
	{
		public Entropy()
		{
		}
		private Heat q;
		public double Difference(Heat Q, Temperature Ti, Temperature Tf)
		{
			q = Q;
            Calculus.Function<double,double> f = new Calculus.Function<double,double>(dQOVERdTOVERT);
			return Calculus.Integration1D(f,Ti.K,Tf.K); 
		}
		public double JPERK
		{
			get{return this.Magnitude;}
			set{this.Magnitude = value;}
		}
		private double dQOVERdTOVERT(double T)
		{
			return q.DerivativeWithRespectToTemperature(T)/T;
		}
		private double W;
		public double NumberOfMicrostates
		{
			get{return W;}
			set
			{
			    W = value; 
				this.Magnitude = Constant.BolzmannConstant*Math.Log(W);
			}
		}
        public override string ToString()
        {
            return base.ToString() + "(J/K)";
        }
	}
}