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

// Constructor for Grid
// Initialise the grid
// to void and creates
// player objects and umpire.
// Also starts playing.
Grid::Grid()
{
  int i,j;
  
  for (i= 0; i < 3; i++)
    {
      for (j = 0; j < 3; j++)
	{
	  grid[i][j] = ' ';
	}
    }
  xPlayer = new Player(this,'X');
  oPlayer = new Player(this,'0');
  umpire = new Umpire();
  curToken = 'X';
  xPlayer->makeAMove();
}

// We need to delete the objects 
// we have created to 
// avoid memory leaks
Grid::~Grid()
{
  delete xPlayer;
  delete oPlayer;
  delete umpire;
}

// Prints the grid in a visible format
void Grid::printGrid()
{
  int i,j;
  
  cout << "  ";
  for (i = 0; i < 3; i++)
    {
      cout << i <<" ";
    }
  cout << endl;
  for (i= 0; i < 3; i++)
    {
      cout << i << " ";
      for (j = 0; j < 3; j++)
	{
	  cout << grid[i][j] << " ";
	}
      cout << endl;
    }
  cout << endl;
}

// Key function of the program
// Checks if tbe move is valid
// And ask players to play in turn
void Grid::move(int r, int c)
{

  char returned;

  cout << "Move is " << curToken << " " << r << " " << c << endl;
  returned = umpire->validate(curToken,r,c);
  switch(returned)
    {
    case 'v':
      grid[r][c] = curToken;
      if (curToken == 'O')
	curToken = 'X';
      else 
	curToken = 'O';
      if (curToken=='X') 
	xPlayer->makeAMove();
      else
	oPlayer->makeAMove();
      break;
    case 'i':
      cout << "Invalid move - try again" << endl;
      if (curToken=='X') 
	xPlayer->makeAMove();
      else
	oPlayer->makeAMove();
      break;
    case 'w':   
      cout<< curToken << "Player wins" << endl;
      break;
    case 'd':
      grid[r][c] = curToken;
      cout << "It's a draw." << endl;
      printGrid();
      break;
    default:
      cout << "Odd return " << endl;
    }
}