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 /*
     SPDX-FileCopyrightText: 2019 Hy Murveit <hy-1@murveit.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include <QVector>
 #include <qcustomplot.h>
 
 namespace Ekos
 {
 
 class PolynomialFit
 {
 public:
     // Constructor. Pass in the degree of the desired polynomial fit, and a vector with the x and y values.
     // The constructor solves for the polynomial coefficients.
     PolynomialFit(int degree, uint8_t maxCount, const QVector<double>& x, const QVector<double>& y);
     PolynomialFit(int degree, const QVector<int>& x, const QVector<double>& y);
 
     // Returns the minimum position and value in the pointers for the solved polynomial.
     // Returns false if the polynomial couldn't be solved.
     bool findMinimum(double expected, double minPosition, double maxPosition, double *position, double *value);
 
     /**
      * @brief Polynomial function f(x)
      * @param x argument
      * @return f(x)
      */
     double f(double x);
 
 
 private:
     // Solves for the polynomial coefficients.
     void solve(const QVector<double>& positions, const QVector<double>& values);
 
     // Calculates the value of the polynomial at x.
     // Params will be cast to a PolynomialFit*.
     static double polynomialFunction(double x, void *params);
 
     // Polynomial degree.
     int degree;
     // The data values.
     QVector<double> x, y;
     // The solved polynomial coefficients.
     std::vector<double> coefficients;
 };
 }