/*
Copyright (c) 2009-2013, UT-Battelle, LLC
All rights reserved

[SPF, Version 7.0]
[by G.A., Oak Ridge National Laboratory]

UT Battelle Open Source Software License 11242008

OPEN SOURCE LICENSE

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charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), a
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must include the following acknowledgment:

"This product includes software produced by UT-Battelle,
LLC under Contract No. DE-AC05-00OR22725  with the
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*********************************************************
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*/
/** \ingroup SPF */
/*@{*/

/*! \file HubbardOneOrbitalFields.h
 *
 *  Wrapper around classical spin, to say that only spin is a MC variable
 *
 */
#ifndef HUBBARD_ONE_ORB_FIELDS_H
#define HUBBARD_ONE_ORB_FIELDS_H
#include "loki/Typelist.h"
#include "../../ClassicalFields/ContVarFiniteOperations.h"

namespace Spf {
	template<typename FieldType,typename GeometryType>
	class HubbardOneOrbitalFields {

	public:

		enum {CHARGE, MAG};

		typedef ContVarFiniteOperations<GeometryType,FieldType> ContVarFiniteOperationsType;
		typedef typename ContVarFiniteOperationsType::DynVarsType ContVarFiniteType;
		typedef typename ContVarFiniteType::PairRealType PairRealType;

		typedef LOKI_TYPELIST_2(ContVarFiniteOperationsType,ContVarFiniteOperationsType) OperationsList;

		template<typename SomeParamsType>
		HubbardOneOrbitalFields(SizeType vol,const SomeParamsType& params)
		    : name_(2),
		      charge_(vol,params.dynvarsfile,0,PairRealType(0,2)),
		      mag_(vol,params.dynvarsfile,1,PairRealType(-1,1))
		{
			setNames();
		}

		HubbardOneOrbitalFields(const ContVarFiniteType& charge,const ContVarFiniteType& mag)
		    : name_(2),charge_(charge),mag_(mag)
		{
			setNames();
		}

		const PsimagLite::String& name(SizeType i) const
		{
			return name_[i];
		}

		void getField(ContVarFiniteType const** field,SizeType i) const
		{
			assert(i == 0 || i == 1);
			if (i == 0)
				*field = &charge_;
			else if (i == 1)
				*field = &mag_;
			else
				throw PsimagLite::RuntimeError("HubbardOneOrbitalFields::getField()\n");
		}

		void getField(ContVarFiniteType** field,SizeType i)
		{
			assert(i == 0 || i == 1);
			if (i==0)
				*field = &charge_;
			else if (i == 1)
				*field = &mag_;
			else
				throw PsimagLite::RuntimeError("HubbardOneOrbitalFields::getField()\n");
		}

		const ContVarFiniteType& getField(SizeType what) const
		{
			return (what==CHARGE) ? charge_ : mag_;
		}


		template<typename FieldType2,typename GeometryType2>
		friend std::ostream& operator<<(std::ostream& os,const HubbardOneOrbitalFields<FieldType2,GeometryType2>& f);

	private:

		void setNames()
		{
			assert(name_.size()==2);
			name_[CHARGE] = "Charge";
			name_[MAG] = "Mag";
		}

		PsimagLite::Vector<PsimagLite::String>::Type name_;
		ContVarFiniteType charge_;
		ContVarFiniteType mag_;

	}; // HubbardOneOrbitalFields

	template<typename FieldType,typename GeometryType>
	std::ostream& operator<<(std::ostream& os,const HubbardOneOrbitalFields<FieldType,GeometryType>& f)
	{
		os<<f.charge_;
		os<<f.mag_;
		return os;
	}

} // namespace Spf

/*@}*/
#endif
