autoplayer work but random for the moment

src/backend/AutoPlayer.java

@@ -1,17 +1,32 @@
 package backend;
 
+import java.util.ArrayList;
+import java.util.Random;
+
 public class AutoPlayer {
 
+    /**
+     * Returns a random legal move for the active player.
+     */
+    public Move computeBestMove(Board board) {
+        ArrayList<Piece> pieces = board.getPieces();
+        ArrayList<Move> allMoves = new ArrayList<>();
+        boolean isWhite = board.isTurnWhite();
 
-	/**
-	 * returns the best Move to try on provided board for active player
-	 * @param board
-	 * @return
-	 */
-	public Move computeBestMove(Board board) {
-		
-		return null;
-	}
+        // Collect all legal moves for all of the active player's pieces
+        for (Piece piece : pieces) {
+            if (piece.isWhite() == isWhite) {
+                ArrayList<Move> moves = board.getLegalMoves(piece);
+                allMoves.addAll(moves);
+            }
+        }
 
+        if (allMoves.isEmpty()) {
+            return null; // No moves = checkmate or stalemate
+        }
 
+        // Pick a random move
+        Random rand = new Random();
+        return allMoves.get(rand.nextInt(allMoves.size()));
+    }
 }

src/backend/Board.java

@@ -516,9 +516,37 @@ public class Board {
 	}
 	
 	
-	public Board(Board board) {
-		//TODO
+	public Board(Board original) {
+	    this.width = original.width;
+	    this.height = original.height;
+	    this.turn = original.turn;
+	    this.selectedX = original.selectedX;
+	    this.selectedY = original.selectedY;
+	    this.enPassantCol = original.enPassantCol;
+	    this.enPassantRow = original.enPassantRow;
 
+	    // Deep copy the board array and pieces
+	    this.board = new Piece[width][height];
+	    for (int x = 0; x < width; x++) {
+	        for (int y = 0; y < height; y++) {
+	            Piece p = original.board[x][y];
+	            if (p != null) {
+	                this.board[x][y] = new Piece(p.isWhite(), p.getType(), x, y);
+	            } else {
+	                this.board[x][y] = null;
+	            }
+	        }
+	    }
+	    // Deep copy highlightedSquares
+	    this.highlightedSquares = new boolean[width][height];
+	    for (int x = 0; x < width; x++) {
+	        for (int y = 0; y < height; y++) {
+	            this.highlightedSquares[x][y] = original.highlightedSquares[x][y];
+	        }
+	    }
+
+	    // Undo stack is not copied (empty)
+	    this.undoStack = new Stack<>();
 	}//test