/// <summary>
/// Allows two AI players to play against each other. Records the state of the game after each turn to
/// allow the game to be replayed
/// </summary>
/// <param name="board"></param>
private static void AiVsAi(Board board)
{
Square currentPlayer = Square.Red;
// list for storing all subsequent states of the game
List <State> states = new List <State>();
// add initial state of the game to the list
State firstState = new State(board.GetState(), currentPlayer);
states.Add(firstState);
// initialize pointer variable and point it to the initial state of the game
int pointer = 0;
Ai bot = new Ai();
// continue the game as long as current player has any pieces left
while (board.GetPlayersPieces(currentPlayer).Any())
{
Console.WriteLine("\n\nTurn #{0} Player: {1}", pointer + 1, currentPlayer);
board.PrintBoard();
// get the list of pieces belonging to current player
var playersPieces = board.GetPlayersPieces(currentPlayer);
// get the list of legal non-jump moves that player can make
var legalMoves = board.GetLegalMoves(playersPieces);
// get the list of legal jumps that player can (have to) make
var legalJumps = board.GetLegalJumps(playersPieces);
// if current player has no jumps and no regular moves to make, he's lost
if (legalJumps.Count + legalMoves.Count == 0)
{
break;
}
State state = new State(board.GetState(), currentPlayer);
// get the move from the AI player based on the current state of the board
Move bestMove = bot.GetBestMove(board, state);
// AI is jumping
if (bestMove.IsJump)
{
while (legalJumps.Any())
{
Piece jumpingPiece =
playersPieces.Find(piece => piece.X == bestMove.FromRow && piece.Y == bestMove.FromCol);
bool kingBeforeJump = jumpingPiece.IsKing;
board.DoJump(bestMove, jumpingPiece);
Console.WriteLine("AI's move: from {0} to {1}", bestMove.CoordinateFrom, bestMove.CoordinateTo);
// update variables of the piece that has just jumped
jumpingPiece.HasJustJumped = true;
jumpingPiece.X = bestMove.ToRow;
jumpingPiece.Y = bestMove.ToCol;
// all pieces other than the one that has just jumped are irrelevant when checking if more jumps can be made
playersPieces.RemoveAll(piece => piece.HasJustJumped == false);
legalJumps = board.GetLegalJumps(playersPieces);
// update position of the jumping piece on the board
board.UpdatePosition(jumpingPiece, bestMove.FromRow, bestMove.FromCol);
// no further jumps can be made if piece became a king after the first jump
if (!kingBeforeJump && bestMove.ToRow == 0 | bestMove.ToRow == 7)
{
break;
}
// make a subsequent jump if there is one
if (legalJumps.Any())
{
bestMove = legalJumps.First();
}
}
}
else
{
board.MovePiece(bestMove);
Console.WriteLine("AI's move: from {0} to {1}", bestMove.CoordinateFrom, bestMove.CoordinateTo);
}
currentPlayer = ChangeTurn(currentPlayer);
// create new state of the game after move was made
State newState = new State(board.GetState(), currentPlayer);
// move was made after performing undo operation since pointer is not pointing to the last state
if (pointer < states.Count - 1)
{
// newState now becomes the last state, remove all states that happened after it
states.RemoveAll(other => states.IndexOf(other) > pointer);
}
states.Add(newState);
// set pointer to the new state
pointer = states.IndexOf(newState);
}
Console.WriteLine("\n\n{0} player won!", ChangeTurn(currentPlayer));
// print the final state of the board once the game has ended
board.PrintBoard();
// add states all subsequent states of the game to the list of previous games
previousGames.Add(states);
Console.WriteLine("Replay the game? Plase answer Y/N");
string answer = Console.ReadLine();
while (!answer.Equals("y") && !answer.Equals("n"))
{
Console.WriteLine("Please type 'Y' to replay the game or 'N' to skip");
answer = Console.ReadLine();
}
if (answer.Equals("y"))
{
ReplayGame(states);
}
}
/// <summary>
/// Allows human player to play against AI player. Records the state of the game after each turn to provide
/// undo/redo/replay functionalities
/// </summary>
/// <param name="board"></param>
private static void HumanVsAi(Board board)
{
Square currentPlayer = Square.Red;
// list for storing all subsequent states of the game
List <State> states = new List <State>();
// add initial state of the game to the list
State firstState = new State(board.GetState(), currentPlayer);
states.Add(firstState);
// initialize pointer variable and point it to the initial state of the game
int pointer = 0;
Ai bot = new Ai();
// continue the game as long as current player has any pieces left
while (board.GetPlayersPieces(currentPlayer).Any())
{
Console.WriteLine("\n\nTurn #{0} Player: {1}", pointer + 1, currentPlayer);
board.PrintBoard();
// get the list of pieces belonging to current player
var playersPieces = board.GetPlayersPieces(currentPlayer);
// get the list of legal non-jump moves that player can make
var legalMoves = board.GetLegalMoves(playersPieces);
// get the list of legal jumps that player can (have to) make
var legalJumps = board.GetLegalJumps(playersPieces);
// if current player has no jumps and no regular moves to make, he's lost
if (legalJumps.Count + legalMoves.Count == 0)
{
break;
}
// human player's turn
if (currentPlayer == Square.Red)
{
Console.WriteLine("What would you like to do? Type 'Undo', 'Redo', or press enter to carry on");
var choice = Console.ReadLine();
if (choice.Equals("undo", StringComparison.CurrentCultureIgnoreCase))
{
// check whether there were any states before current state
if (pointer > 0)
{
pointer -= 2;
// get a deep copy of the previous state of the game
State previousState = states[pointer].DeepCopy();
//Console.WriteLine("RESTORED STATE: " + pointer);
// set previous state of the game to be the current state and reverse player's turn
board.SetState(previousState.BoardState);
currentPlayer = previousState.CurrentPlayer;
}
else
{
Console.WriteLine("You can't go back any further");
}
}
else if (choice.Equals("redo", StringComparison.CurrentCultureIgnoreCase))
{
// check whether there were any states after current state
if (pointer < states.Count - 1)
{
pointer += 2;
// get a deep copy of the next state of the game
State redoState = states[pointer].DeepCopy();
//Console.WriteLine("RESTORED STATE: " + pointer);
// set next state of the game to be the current state and reverse player's turn
board.SetState(redoState.BoardState);
currentPlayer = redoState.CurrentPlayer;
}
else
{
Console.WriteLine("There are no moves to redo");
}
}
else
{
var move = RequestMove();
// no jumps can be made so a regular move has to be made
if (!legalJumps.Any())
{
while (!legalMoves.Contains(move))
{
Console.WriteLine("--------------------Please provide a legal move--------------------");
move = RequestMove();
}
// move can be made as it's in the list of legal moves, perform it
board.MovePiece(move);
}
// force the player to make a jump
while (legalJumps.Any())
{
// see if player's move matches any of the possible jumps
if (legalJumps.Contains(move))
{
// get reference to the piece that will be jumping
Piece jumpingPiece = playersPieces.Find(piece =>
piece.X == move.FromRow && piece.Y == move.FromCol);
bool kingBeforeJump = jumpingPiece.IsKing;
board.DoJump(move, jumpingPiece);
// update variables of the piece that has just jumped
jumpingPiece.HasJustJumped = true;
jumpingPiece.X = move.ToRow;
jumpingPiece.Y = move.ToCol;
// all pieces other than the one that has just jumped are irrelevant when checking if more jumps can be made
playersPieces.RemoveAll(piece => piece.HasJustJumped == false);
legalJumps = board.GetLegalJumps(playersPieces);
// update position of the jumping piece on the board
board.UpdatePosition(jumpingPiece, move.FromRow, move.FromCol);
// show the state of the board after first jump if another one can be made
if (legalJumps.Any())
{
board.PrintBoard();
}
// no further jumps can be made if piece became a king after the first jump
if (!kingBeforeJump && move.ToRow == 0 | move.ToRow == 7)
{
break;
}
}
else
{
Console.WriteLine("--------------------You have to jump--------------------");
move = RequestMove();
}
}
// change turn
currentPlayer = ChangeTurn(currentPlayer);
// create new state of the game after move was made
State newState = new State(board.GetState(), currentPlayer);
// move was made after performing undo operation since pointer is not pointing to the last state
if (pointer < states.Count - 1)
{
// newState now becomes the last state, remove all states that happened after it
states.RemoveAll(other => states.IndexOf(other) > pointer);
}
states.Add(newState);
// set pointer to the new state
pointer = states.IndexOf(newState);
}
}
// AI player's turn
else if (currentPlayer == Square.White)
{
State state = new State(board.GetState(), currentPlayer);
// get the move from the AI player based on the current state of the board
Move bestMove = bot.GetBestMove(board, state);
// AI is jumping
if (bestMove.IsJump)
{
while (legalJumps.Any())
{
Piece jumpingPiece =
playersPieces.Find(piece => piece.X == bestMove.FromRow && piece.Y == bestMove.FromCol);
bool kingBeforeJump = jumpingPiece.IsKing;
board.DoJump(bestMove, jumpingPiece);
Console.WriteLine("AI's move from {0} to {1}", bestMove.CoordinateFrom, bestMove.CoordinateTo);
// update variables of the piece that has just jumped
jumpingPiece.HasJustJumped = true;
jumpingPiece.X = bestMove.ToRow;
jumpingPiece.Y = bestMove.ToCol;
// all pieces other than the one that has just jumped are irrelevant when checking if more jumps can be made
playersPieces.RemoveAll(piece => piece.HasJustJumped == false);
legalJumps = board.GetLegalJumps(playersPieces);
// update position of the jumping piece on the board
board.UpdatePosition(jumpingPiece, bestMove.FromRow, bestMove.FromCol);
// no further jumps can be made if piece became a king after the first jump
if (!kingBeforeJump && bestMove.ToRow == 0 | bestMove.ToRow == 7)
{
break;
}
// make a subsequent jump if there is one
if (legalJumps.Any())
{
bestMove = legalJumps.First();
}
}
}
else
{
board.MovePiece(bestMove);
Console.WriteLine("AI's move from {0} to {1}", bestMove.CoordinateFrom, bestMove.CoordinateTo);
}
currentPlayer = ChangeTurn(currentPlayer);
// create new state of the game after move was made
State newState = new State(board.GetState(), currentPlayer);
// move was made after performing undo operation since pointer is not pointing to the last state
if (pointer < states.Count - 1)
{
// newState now becomes the last state, remove all states that happened after it
states.RemoveAll(other => states.IndexOf(other) > pointer);
}
states.Add(newState);
// set pointer to the new state
pointer = states.IndexOf(newState);
}
}
Console.WriteLine("\n\n{0} player won!", ChangeTurn(currentPlayer));
// print the final state of the board once the game has ended
board.PrintBoard();
// add states all subsequent states of the game to the list of previous games
previousGames.Add(states);
Console.WriteLine("Replay the game? Plase answer Y/N");
string answer = Console.ReadLine();
while (!answer.Equals("y") && !answer.Equals("n"))
{
Console.WriteLine("Please type 'Y' to replay the game or 'N' to skip");
answer = Console.ReadLine();
}
if (answer.Equals("y"))
{
ReplayGame(states);
}
}
