//# SpectralElement.cc: Describes (a set of related) spectral lines
//# Copyright (C) 2001,2004
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
//#                        520 Edgemont Road
//#                        Charlottesville, VA 22903-2475 USA
//#
//# $Id: SpectralElement.cc 21024 2011-03-01 11:46:18Z gervandiepen $

#include <components/SpectralComponents/PowerLogPolynomialSpectralElement.h>

#include <scimath/Functionals/PowerLogarithmicPolynomial.h>

#include <casa/iostream.h>

#define _ORIGIN  String("PowerLogPolynomialSpectralElement::") + __FUNCTION__ + ":" + String::toString(__LINE__) + ": "


namespace casa { //# NAMESPACE CASA - BEGIN

/*
PowerLogPolynomialSpectralElement::PowerLogPolynomialSpectralElement(
	uInt n
) : SpectralElement(SpectralElement::POWERLOGPOLY, n) {
	if (n == 0) {
		throw AipsError(_ORIGIN + "n must be greater than zero.");
	}
	//_makeFunction();
	_setFunction(
		std::shared_ptr<PowerLogarithmicPolynomial<Double> >(
			new PowerLogarithmicPolynomial(n)
		)
	);
}
*/
PowerLogPolynomialSpectralElement::PowerLogPolynomialSpectralElement(
	const Vector<Double>& param
) : SpectralElement(SpectralElement::POWERLOGPOLY, param) {
	//_makeFunction();
	_setFunction(
		std::shared_ptr<PowerLogarithmicPolynomial<Double> >(
			new PowerLogarithmicPolynomial<Double>(param.tovector())
		)
	);
}

/*
void PowerLogPolynomialSpectralElement::_makeFunction() {
	ostringstream function;
	function << "p0";
	uInt n = get().size();
	for (uInt i=1; i<n; i++) {
		if (i == 1) {
			function << "*(x)^(p1";
		}
		else {
			function << " + p" << i << "*ln(x)";
			if (i > 2) {
				function << "^" << (i-1);
			}
		}
		if (i == n-1) {
			function << ")";
		}
	}
	_setFunction(function.str());
}
*/

PowerLogPolynomialSpectralElement::PowerLogPolynomialSpectralElement(
	const PowerLogPolynomialSpectralElement &other
) : SpectralElement(other) {}

PowerLogPolynomialSpectralElement::~PowerLogPolynomialSpectralElement() {}

PowerLogPolynomialSpectralElement& PowerLogPolynomialSpectralElement::operator=(
	const PowerLogPolynomialSpectralElement& other
) {
	if (this != &other) {
		SpectralElement::operator=(other);
	}
	return *this;
}

SpectralElement* PowerLogPolynomialSpectralElement::clone() const {
	return new PowerLogPolynomialSpectralElement(*this);
}

ostream &operator<<(ostream& os, const PowerLogPolynomialSpectralElement& elem) {
	os << SpectralElement::fromType((elem.getType())) << " element: " << endl;
	ostringstream function;
	function << "p0";
	uInt n = elem.get().size();
	for (uInt i=1; i<n; i++) {
		if (i == 1) {
			function << "*(x)^(p1";
		}
		else {
			function << " + p" << i << "*ln(x)";
			if (i > 2) {
				function << "^" << (i-1);
			}
		}
		if (i == n-1) {
			function << ")";
		}
	}
	os << "  Function:    " << function.str() << endl;
	const Vector<Double> p = elem.get();
	for (uInt i=0; i<p.size(); i++) {
		os << "p" << i << ": " << p[i] << endl;
	}
	return os;
}


} //# NAMESPACE CASA - END

