#pragma once
#include <string>
#include <vector>

enum class DirT{UP, DOWN, LEFT, RIGHT, UP_LEFT, 
                UP_RIGHT, DOWN_LEFT, DOWN_RIGHT,
                NEXT, BACK, NONE};
const std::vector<std::string> DIRECTION_NAMES{"up","down","left","right",
                     "up left", "up right", "down left", "down right",
                     "next", "back", "none"};
const int DIRECTION_COUNT{static_cast<int>(DirT::NONE)};

std::string DirTToString(DirT dir);
DirT StringToDirT(std::string name);

DirT NextDir(DirT dir);

// forward declaration, can't be used in a system without a BoardT.
class BoardT;

class CoordT {
   public:
       CoordT(const BoardT & b, std::size_t  xpos =0, std::size_t ypos = 0);
       CoordT(const CoordT & other);
 
       CoordT & operator = (const CoordT & other);

       std::size_t X() const;
       std::size_t Y() const;

       void Change(DirT direction);
       void Set(std::size_t xpos, std::size_t ypos);
       bool SuccessfulChange() const;

   private:
       const BoardT & board;       
       std::size_t x, y;
       bool error;
       friend class BoardT;
};