#include <iostream>
#include <vector>
#include <exception>

using namespace std;

class MapT {

   public:
      MapT(size_t x=10, size_t y=10) :
         width{x}, height{y} , data(width, vector<char>(height, '.'))
      {
         cout << "The map is " << data.size() 
              << " by " << data[0].size() << endl;
      }

      size_t Width() const {
         return width;
      }

      size_t Height() const {
         return height;
      }

      char Pos(size_t x, size_t y) const {
         if (x < width and y < height) {
            return data[x][y]; 
         } else {
            throw out_of_range("Pos must be in range");
         }
      }

      void Set(size_t x, size_t y, char thing) {
         if (x < width and y < height) {
            data[x][y] = thing; 
         } else {
            throw out_of_range("Pos must be in range");
         }
      }
        
   private:
      size_t width, height;
      vector<vector<char>> data;
};

class CritterT {
   public:
      CritterT(MapT & map, size_t xpos=0, size_t ypos=0, char r ='@'):
          theMap{map}, x{xpos}, y{ypos}, rep{r}
      {
          Fix();
          cout << "Currently the map has a " << theMap.Pos(x,y) << endl;
          theMap.Set(x,y,rep);
      }

      void Up() {
         theMap.Set(x,y,'.');
         ++y;
         Fix();
         theMap.Set(x,y,rep);
      }

      void Down() {
         theMap.Set(x,y,'.');
         if (y == 0) {
            y = theMap.Height()-1;
         } else {
            --y;
         }
         theMap.Set(x,y,rep);
      }   

      void Left() {
         theMap.Set(x,y,'.');
         if (x == 0) {
            x = theMap.Width()-1;
         } else {
            --x;
         }
         theMap.Set(x,y,rep);
      }

      void Right() {
         theMap.Set(x,y,'.');
         ++x;
         Fix();
         theMap.Set(x,y,rep);
      }


   private:

      void Fix() {
          x = x % theMap.Width();
          y = y % theMap.Height();
      }
      MapT & theMap;
      size_t x, y;
      char rep;
};

void PrintMap(const MapT & map);

int main() {
   MapT  world(5,7);
   char c;
   bool done {false};

   CritterT me(world, 5, 8);

   PrintMap(world);

   while( not done) {
       cout << "Action (wasdq) :";
       cin >> c;
       switch(c) {
          case 'w': me.Up(); break;
          case 'a': me.Left(); break;
          case 's': me.Down(); break;
          case 'd': me.Right(); break;
          case 'q': done = true; break;

       }
       cout << endl;
       PrintMap(world);
   }
}

void PrintMap(const MapT & map) {
    size_t x,y;
    for(y =  map.Height(); y > 0; --y) {
       for(x = 0; x < map.Width(); ++ x) {
           cout << map.Pos(x,y-1);
       }
       cout << endl;
    }
}