#ifndef SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H
#define SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H

#include "banner_view.h"
#include "curve_view_cursor.h"
#include "poincare_helpers.h"
#include "../constant.h"

namespace Shared {

template<class T>
class StorageFunctionBannerDelegate  {
public:
  constexpr static int k_maxNumberOfCharacters = 50;
  constexpr static int k_maxDigitLegendLength = 11;
protected:
  void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, T * function, char symbol) {
    char buffer[k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
    const char * space = "                  ";
    int spaceLength = strlen(space);
    const char * legend = "0=";
    int legendLength = strlen(legend);
    int numberOfChar = 0;
    strlcpy(buffer, legend, legendLength+1);
    numberOfChar += legendLength;
    buffer[0] = symbol;
    numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer+numberOfChar, Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
    strlcpy(buffer+numberOfChar, space, spaceLength+1);
    buffer[k_maxDigitLegendLength+2] = 0;
    bannerView()->setLegendAtIndex(buffer, 0);

    numberOfChar = 0;
    legend = "0(x)=";
    legendLength = strlen(legend);
    numberOfChar += legendLength;
    strlcpy(buffer, legend, legendLength+1);
    buffer[2] = symbol;
    buffer[0] = function->name()[0];
    numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->y(), buffer+legendLength, Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
    strlcpy(buffer+numberOfChar, space, spaceLength+1);
    buffer[k_maxDigitLegendLength+5] = 0;
    bannerView()->setLegendAtIndex(buffer, 1);
  }
  virtual BannerView * bannerView() = 0;
};

}

#endif