#include <iostream.h>
#include "Grid.h"
#include "Umpire.h"

// Initialised its own version
// of the grid.
// We could use the grid directly but
// it would be more complicated as we would
// have to access the data member grid of the
// grid class (overloading [][] operation for instance
Umpire::Umpire()
{
  int i,j;
  
  for (i= 0; i < 3; i++)
    {
      for (j = 0; j < 3; j++)
	{
	  myGrid[i][j] = ' ';
	}
    }
}

// Validates a grid move.
// Checks for state of the move (valid, invalid)
// And Game (won, draw)
char Umpire::validate(char t, int r, int c)
  {
    int i, j;
    
    if(r > 2 || c > 2 || myGrid[r][c]!=' ') 
      {
	return 'i';
      }
    myGrid[r][c] = t;
    if(myGrid[r][0]==myGrid[r][1] 
      && myGrid[r][1]==myGrid[r][2]) return 'w';
 
    if(myGrid[0][c]==myGrid[1][c] 
      && myGrid[1][c]==myGrid[2][c]) return 'w';
  
    for(i=0;i<3;i++)
      for(j=0;j<3;j++) 
        if (myGrid[i][j]==' ') return 'v';
 
    return 'd';		
  }