app/src/main/java/chess/SwingMain.java

@@ -1,5 +1,6 @@
 package chess;
 
+import chess.ai.AlphaBetaAI;
 import chess.ai.DumbAI;
 import chess.ai.HungryAI;
 import chess.controller.CommandExecutor;
@@ -18,12 +19,15 @@ public class SwingMain {
         Window window = new Window(commandExecutor, false);
         commandExecutor.addListener(window);
 
-        DumbAI ai = new DumbAI(commandExecutor, Color.Black);
+        DumbAI ai = new DumbAI(commandExecutor, Color.White);
         commandExecutor.addListener(ai);
 
-        HungryAI ai2 = new HungryAI(commandExecutor, Color.White);
+        AlphaBetaAI ai2 = new AlphaBetaAI(commandExecutor, Color.Black, 3);
         commandExecutor.addListener(ai2);
 
+        // Window window2 = new Window(ai2.getSimulation(), false);
+        // ai2.getSimulation().addListener(window2);
+
         commandExecutor.addListener(new GameAdaptator(){
             @Override
             public void onGameEnd() {

app/src/main/java/chess/ai/AI.java

@@ -4,6 +4,7 @@ import java.util.List;
 
 import chess.controller.Command;
 import chess.controller.CommandExecutor;
+import chess.controller.Command.CommandResult;
 import chess.controller.commands.GetPieceAtCommand;
 import chess.controller.commands.GetPlayerMovesCommand;
 import chess.controller.commands.GetAllowedCastlingsCommand;
@@ -50,8 +51,12 @@ public abstract class AI extends GameAdaptator{
 	}
 
 	protected List<Move> getAllowedMoves() {
+		return getAllowedMoves(this.commandExecutor);
+	}
+
+	protected List<Move> getAllowedMoves(CommandExecutor commandExecutor) {
 		GetPlayerMovesCommand cmd = new GetPlayerMovesCommand();
-		sendCommand(cmd);
+		sendCommand(cmd, commandExecutor);
 		return cmd.getMoves();
 	}
 
@@ -61,8 +66,16 @@ public abstract class AI extends GameAdaptator{
 		return cmd2.getCastlingResult();
 	}
 
-	protected void sendCommand(Command command) {
-		this.commandExecutor.executeCommand(command);
+	protected CommandResult sendCommand(Command command) {
+		return sendCommand(command, this.commandExecutor);
+	}
+
+	protected CommandResult sendCommand(Command command, CommandExecutor commandExecutor) {
+		CommandResult result = commandExecutor.executeCommand(command);
+		if(result == CommandResult.NotAllowed){
+			System.out.println("eeeeee");
+		}
+		return result;
 	}
 	
 }

app/src/main/java/chess/ai/AlphaBetaAI.java

@@ -0,0 +1,141 @@
+package chess.ai;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import chess.controller.CommandExecutor;
+import chess.controller.commands.CastlingCommand;
+import chess.controller.commands.MoveCommand;
+import chess.controller.commands.NewGameCommand;
+import chess.controller.commands.PromoteCommand;
+import chess.controller.commands.PromoteCommand.PromoteType;
+import chess.controller.commands.UndoCommand;
+import chess.model.ChessBoard;
+import chess.model.Color;
+import chess.model.Coordinate;
+import chess.model.Game;
+import chess.model.Move;
+
+public class AlphaBetaAI extends AI {
+
+	private final int searchDepth;
+	private final PieceCost pieceCost;
+	private final CommandExecutor simulation;
+	private final Game gameSimulation;
+
+	public AlphaBetaAI(CommandExecutor commandExecutor, Color color, int searchDepth) {
+		super(commandExecutor, color);
+		this.searchDepth = 3;
+		this.pieceCost = new PieceCost(color);
+		this.gameSimulation = new Game();
+		this.simulation = new CommandExecutor(this.gameSimulation);
+	}
+
+	public CommandExecutor getSimulation() {
+		return simulation;
+	}
+
+	private int getBoardEvaluation() {
+		final ChessBoard board = this.gameSimulation.getBoard();
+		int result = 0;
+		for (int i = 0; i < Coordinate.VALUE_MAX; i++) {
+			for (int j = 0; j < Coordinate.VALUE_MAX; j++) {
+				result += pieceCost.getCost(board.pieceAt(new Coordinate(i, j)));
+			}
+		}
+		return result;
+	}
+
+	private int negaMax(int depth, int alpha, int beta) {
+		if (depth == 0)
+			return getBoardEvaluation();
+
+		int value = Integer.MIN_VALUE;
+
+		List<Move> moves = getAllowedMoves(this.simulation);
+
+		if (moves.isEmpty()) {
+			System.out.println("oaaaaaaaaa");
+			int board = getBoardEvaluation();
+			int result = board + (this.gameSimulation.getPlayerTurn() == this.color ? -100 : 100);
+			return result;
+		}
+
+		for (Move move : moves) {
+			sendCommand(new MoveCommand(move), this.simulation);
+			if (this.gameSimulation.getBoard().pawnShouldBePromoted())
+				sendCommand(new PromoteCommand(PromoteType.Queen), this.simulation);
+			int leaveValue = -negaMax(depth - 1, -beta, -alpha);
+			value = Integer.max(value, leaveValue);
+			sendCommand(new UndoCommand(), this.simulation);
+			alpha = Integer.max(alpha, value);
+			if (alpha >= beta)
+				return value;
+		}
+
+		return value;
+	}
+
+	private Move getBestMove() {
+		List<Move> moves = getAllowedMoves(this.simulation);
+		int bestMove = Integer.MIN_VALUE;
+		List<Move> bestMoves = new ArrayList<>(20);
+
+		for (Move move : moves) {
+			sendCommand(new MoveCommand(move), this.simulation);
+			if (this.gameSimulation.getBoard().pawnShouldBePromoted())
+				sendCommand(new PromoteCommand(PromoteType.Queen), this.simulation);
+			int value = -negaMax(this.searchDepth - 1, Integer.MIN_VALUE, Integer.MAX_VALUE);
+			sendCommand(new UndoCommand(), this.simulation);
+			if (value > bestMove) {
+				bestMove = value;
+				bestMoves.clear();
+				bestMoves.add(move);
+			} else if (value == bestMove) {
+				bestMoves.add(move);
+			}
+		}
+
+		System.out.println("Best move : " + bestMove + " count : " + bestMoves.size());
+
+		return bestMoves.get(new Random().nextInt(bestMoves.size()));
+	}
+
+	@Override
+	public void onGameStart() {
+		sendCommand(new NewGameCommand(), this.simulation);
+	}
+
+	@Override
+	public void onPawnPromoted(PromoteType promotion, Color player) {
+		// if (player == this.color)
+		// 	return;
+		sendCommand(new PromoteCommand(promotion), this.simulation);
+	}
+
+	@Override
+	public void onCastling(boolean bigCastling) {
+		sendCommand(new CastlingCommand(bigCastling), this.simulation);
+	}
+
+	@Override
+	public void onMove(Move move) {
+		sendCommand(new MoveCommand(move), this.simulation);
+	}
+
+	@Override
+	protected void play() {
+		long current = System.currentTimeMillis();
+		Move move = getBestMove();
+		long elapsed = System.currentTimeMillis() - current;
+		System.out.println("Took " + elapsed + "ms");
+		sendCommand(new MoveCommand(move));
+	}
+
+	@Override
+	protected void promote(Coordinate pawnCoords) {
+		sendCommand(new PromoteCommand(PromoteType.Queen));
+	}
+
+}

app/src/main/java/chess/controller/CommandExecutor.java

@@ -55,7 +55,6 @@ public class CommandExecutor {
 				this.dispatcher.onBoardUpdate();
 				if (checkGameStatus()) {
 					this.dispatcher.onGameEnd();
-					return;
 				}
 				switchPlayerTurn(command instanceof UndoCommand);
 				return;

app/src/main/java/chess/controller/commands/CastlingCommand.java

@@ -49,6 +49,8 @@ public class CastlingCommand extends PlayerCommand {
 		board.applyMove(this.kingMove);
 		board.applyMove(this.rookMove);
 
+		outputSystem.onCastling(this.bigCastling);
+
 		return CommandResult.Moved;
 	}
 

app/src/main/java/chess/controller/commands/MoveCommand.java

@@ -37,7 +37,6 @@ public class MoveCommand extends PlayerCommand {
 				return result;
 
 			case Moved:
-				outputSystem.onMove(this.move);
 				game.saveTraitPiecesPos();
 				return result;
 
@@ -76,11 +75,14 @@ public class MoveCommand extends PlayerCommand {
 		}
 
 		if (tryPromote(game, outputSystem)) {
+			outputSystem.onMove(this.move);
 			return CommandResult.ActionNeeded;
 		}
 
 		board.setLastMove(this.move);
 
+		outputSystem.onMove(this.move);
+
 		return CommandResult.Moved;
 	}
 

app/src/main/java/chess/controller/commands/PromoteCommand.java

@@ -55,6 +55,8 @@ public class PromoteCommand extends PlayerCommand {
 		this.oldPawn = pawn;
 		board.pieceComes(createPiece(this.promoteType, pawn.getColor()), this.pieceCoords);
 
+		outputSystem.onPawnPromoted(this.promoteType, game.getPlayerTurn());
+
 		return CommandResult.Moved;
 	}
 

app/src/main/java/chess/controller/event/GameAdaptator.java

@@ -1,5 +1,6 @@
 package chess.controller.event;
 
+import chess.controller.commands.PromoteCommand.PromoteType;
 import chess.model.Color;
 import chess.model.Coordinate;
 import chess.model.Move;
@@ -45,4 +46,10 @@ public abstract class GameAdaptator implements GameListener {
 	@Override
 	public void onDraw() {}
 
+	@Override
+	public void onCastling(boolean bigCastling) {}
+
+	@Override
+	public void onPawnPromoted(PromoteType promotion, Color player) {}
+
 }

app/src/main/java/chess/controller/event/GameDispatcher.java

@@ -6,6 +6,7 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.function.Consumer;
 
+import chess.controller.commands.PromoteCommand.PromoteType;
 import chess.model.Color;
 import chess.model.Coordinate;
 import chess.model.Move;
@@ -93,6 +94,16 @@ public class GameDispatcher implements GameListener {
 		asyncForEachCall((l) -> l.onDraw());
 	}
 
+	@Override
+	public void onCastling(boolean bigCastling) {
+		asyncForEachCall((l) -> l.onCastling(bigCastling));		
+	}
+
+	@Override
+	public void onPawnPromoted(PromoteType promotion, Color player) {
+		asyncForEachCall((l) -> l.onPawnPromoted(promotion, player));
+	}
+
 	public void stopService() {
 		this.executor.shutdown();
 	}

app/src/main/java/chess/controller/event/GameListener.java

@@ -1,5 +1,6 @@
 package chess.controller.event;
 
+import chess.controller.commands.PromoteCommand.PromoteType;
 import chess.model.Color;
 import chess.model.Coordinate;
 import chess.model.Move;
@@ -15,7 +16,7 @@ public interface GameListener {
 	 * Invoked when a draw occurs (same position is repeated three times)
 	 */
 	void onDraw();
-	
+
 	/**
 	 * Invoked when the game has ended (by a win or a draw)
 	 */
@@ -25,7 +26,7 @@ public interface GameListener {
 	 * Invoked when the game has started
 	 */
 	void onGameStart();
-	
+
 	/**
 	 * Invoked when a king is in check
 	 */
@@ -35,47 +36,68 @@ public interface GameListener {
 	 * Invoked when a checkmate occurs
 	 */
 	void onKingInMat();
-	
+
 	/**
 	 * Invoked when a valid move on the board occurs
+	 * 
 	 * @param move the move to be processed
 	 */
 	void onMove(Move move);
 
 	/**
 	 * Invoked when a sent move is not allowed
+	 * 
 	 * @param move the move to be processed
 	 */
 	void onMoveNotAllowed(Move move);
-	
+
 	/**
 	 * Invoked when a pat situation occurs
 	 */
 	void onPatSituation();
-	
+
 	/**
 	 * Invoked when it's the player turn
-	 * @param color the color of the player who should play
+	 * 
+	 * @param color  the color of the player who should play
 	 * @param undone true if it's a result of an undo command
 	 */
 	void onPlayerTurn(Color color, boolean undone);
-	
+
 	/**
 	 * Invoked when a pawn should be promoted
+	 * 
 	 * @param pieceCoords the coordinates of the pawn
 	 */
 	void onPromotePawn(Coordinate pieceCoords);
-	
+
 	/**
 	 * Invoked when a players surrenders
+	 * 
 	 * @param coward the player who gave up
 	 */
 	void onSurrender(Color coward);
-	
+
 	/**
 	 * Invoked when a player wins (by checkmate or if the other one surrenders)
+	 * 
 	 * @param winner
 	 */
 	void onWin(Color winner);
 
+	/**
+	 * Invoked when a castling is done
+	 * 
+	 * @param bigCastling if it's queen side castling
+	 */
+	void onCastling(boolean bigCastling);
+
+	/**
+	 * Invoked when a pawn is promoted
+	 * 
+	 * @param promotion the type of promotion
+	 * @param player the player who promoted the pawns
+	 */
+	void onPawnPromoted(PromoteType promotion, Color player);
+
 }

app/src/main/java/chess/view/consolerender/Console.java

@@ -333,4 +333,11 @@ public class Console implements GameListener {
         this.captureInput = captureInput;
     }
 
+    @Override
+    public void onCastling(boolean bigCastling) {}
+
+    @Override
+    public void onPawnPromoted(PromoteType promotion, Color player) {}
+    
+
 }

app/src/main/java/chess/view/simplerender/Window.java

@@ -318,4 +318,10 @@ public class Window extends JFrame implements GameListener {
 		JOptionPane.showMessageDialog(this, "Same position was repeated three times. It's a draw!");
 	}
 
+	@Override
+	public void onCastling(boolean bigCastling) {}
+
+	@Override
+	public void onPawnPromoted(PromoteType promotion, chess.model.Color player) {}
+
 }