#include <cstdio>
#include "spline.h"
extern "C" {
  double Compute (double);
  void plot ();
};
static constexpr Pair measured [] = {
  { +133.9, 125.000 },
  { +152.2, 120.000 },
  { +198.3, 110.000 },
  { +260.0, 100.000 },
  { +343.6,  90.000 },
  { +456.9,  80.000 },
  { +609.9,  70.000 },
//{ +705.1,  65.000 },
  { +814.5,  60.000 },
//{ +940.1,  55.000 },
  { +1082.6,  50.000 },
//{ +1242.9,  45.000 },
  { +1421.2,  40.000 },
//{ +1616.3,  35.000 },
//{ +1826.2,  30.000 },
  { +2047.5,  25.000 },
//{ +2275.6,  20.000 },
//{ +2504.7,  15.000 },
  { +2729.0,  10.000 },
//{ +2942.4,   5.000 },
  { +3139.8,   0.000 },
//{ +3317.3,  -5.000 },
  { +3472.7, -10.000 },
//{ +3605.2, -15.000 },
  { +3715.6, -20.000 },
//{ +3805.4, -25.000 },
  { +3876.9, -30.000 },
  { +3960.2, -38.000 },
  { +3976.0, -40.000 },
};

static const SPLINE<array_size(measured)> spline (measured, false);

double Compute (double x) {
  try {
    const real r = spline.interpolate (to_real(x, 16));
    return from_real(r);
  } catch (const char * e) {
    fprintf(stderr, "%s at x = %f\n", e, x);
  };
  return 0;
}
void plot () {
  printf("Cubic Spline Coefficients - počet bodů : %zd\n", array_size (measured) - 1ul);
  for (auto & e: spline) {
    printf ("%12g: a = %+13g, b = %+13g, c = %+13g, d = %+13g\n", +e.x, +e.a, +e.b, +e.c, +e.d);
  }
  printf("half ~ %f\n", Compute(2047.45));
}