#pragma once

#include <iostream>

class Color
{
public:
  
  Color(int r, int g, int b, int a = 255);
  
  explicit Color(int g) : Color(g, g, g) {}

  Color operator+(Color const& rhs) const;

  friend std::ostream& operator<<(std::ostream& os, Color const&);
  
private:

  bool out_of_range(int value) const;

  int r;
  int g;
  int b;
  int a;
};

Color operator+(int lhs, Color const& rhs);
Color operator+(Color const& lhs, int rhs);