/// <summary>
/// Initialises a new game with specifed grid size.
/// </summary>
/// <param name="gridColumns">No. of columns in grid</param>
/// <param name="gridRows">No. of rows in grid</param>
public Connect4(IBoardSettings boardSettings, IMessage message)
{
//Initialise
_Message = message;
Winner = false;
GameState = new State(boardSettings);
}
/// <summary>
/// New state base on old state
/// </summary>
/// <param name="original"></param>
public State(State original)
{
Values = (int[,])original.Values.Clone();
RowCount = (int[])original.RowCount.Clone();
Turn = original.Turn;
MoveCount = original.MoveCount;
}
/// <summary>
/// Initialises a new game with specifed grid size.
/// </summary>
/// <param name="gridColumns">No. of columns in grid</param>
/// <param name="gridRows">No. of rows in grid</param>
public Connect4(IBoardSettings boardSettings, IMessage message)
{
//Initialise
_Message = message;
Winner = false;
GameState = new State(boardSettings.Columns,boardSettings.Rows);
GameState.Turn = 1;
}
public bool Turn(int move)
{
try
{
State state = GameState.Move(move);
if (state == null)
return false;
GameState = state;
}
catch(Exception ex)
{
_Message.WriteLine(string.Format("Invalid move - {0}", ex.Message));
}
return true;
}
/// <summary>
/// Creates a new state after the move
/// </summary>
/// <param name="iMove">A number between 1-7 representing the chosen column.</param>
/// <returns></returns>
public State Move(int iMove)
{
State state = new State(this);
if (iMove < 1 || iMove > Columns)
{
throw new ArgumentOutOfRangeException(string.Format("Specified column {1} is not valid. Column index must be between 1 and {0}.", Columns, iMove));
}
int m = iMove - 1;
if (state.RowCount[m] == Rows) return null; //column full.
state.RowCount[m]++;
state.Values[m, (Rows - state.RowCount[m])] = state.Turn; //updates the board.
state.Turn = (state.Turn == 1) ? 2 : 1; //switch player.
state.MoveCount++;
return state;
}
