public GameEngine(HumanPlayer humanPlayer, PCPlayer pcPlayer, Player firstPlayerTurn)
{
if (humanPlayer.XOSymbol == pcPlayer.XOSymbol)
throw new Exception("Invalid Players.You can not give the PC and the Human player the same XO symbol");
HumanPlayer = humanPlayer;
PCPlayer = pcPlayer;
this.currentPlayerTurn = firstPlayerTurn;
gamePad = new XOSymbol[3, 3];
winnerPlayer = null;
isGameOver = false;
}
/// <summary>
/// Rules to be validated
/// 1- Game is not over AND
/// 2- The player own this turn AND
/// 3- The XOSymbol position is valid
/// </summary>
/// <param name="player"></param>
/// <param name="gameMove"></param>
/// <returns></returns>
private bool validateGameMove(Player player, GameMove gameMove)
{
return (!IsGameOver && player.Equals(currentPlayerTurn) && validatePosition(gameMove));
}
/// <summary>
/// Switch between players.
/// For instnace if the Human played, it will give the turn to PC
/// </summary>
private void switchPlayers()
{
if (currentPlayerTurn.Equals(PCPlayer))
currentPlayerTurn = HumanPlayer;
else
currentPlayerTurn = PCPlayer;
}
/// <summary>
/// 1- Set the gameover flag
/// 2- Find the winner
/// </summary>
/// <param name="winnerXOSymbol"></param>
private void endGame( XOSymbol winnerXOSymbol)
{
isGameOver = true;
if (humanPlayer.XOSymbol == winnerXOSymbol)
{
winnerPlayer = humanPlayer;
return;
}
if (pcPlayer.XOSymbol == winnerXOSymbol)
{
winnerPlayer = pcPlayer;
return;
}
}
public bool MakeMove(Player player, GameMove gameMove)
{
if (!validateGameMove(player, gameMove))
{
return false;
}
//Write the move in the GamePad
int rowIndex, columnIndex;
rowIndex = getRowIndex(gameMove.Position);
columnIndex = getColumnIndex(gameMove.Position);
gamePad.SetValue(gameMove.XOSymbol, rowIndex, columnIndex);
//Switch the player turns
switchPlayers();
//Process Game status to see whether there is a Winner, or the game ends
processGame();
//Drive the PCPlayer to Play
if (currentPlayerTurn.Equals(PCPlayer) && !IsGameOver)
pcPlayer.Play();
return true;
}
private void showWinner(Player player)
{
if (player == null)
{
MessageBox.Show("Game finished with no winner");
return;
}
if (player is HumanPlayer)
{
MessageBox.Show("You win :)");
return;
}
if (player is PCPlayer)
{
MessageBox.Show("You lose :(");
return;
}
}
