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OOP_1A6_Project
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last modification making it less dumb

This commit is contained in:
Jérôme BEDIER 2025-05-22 23:37:08 +02:00
parent a0033627cc
commit 99c3a5a2e4
1 changed files with 19 additions and 17 deletions
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36
src/backend/AutoPlayer.java
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@ -5,17 +5,14 @@ import java.util.List;
import java.util.Random; import java.util.Random;
public class AutoPlayer { public class AutoPlayer {
private Integer lastMovedPieceHash = null; // Use piece's position and color for tracking private Integer lastMovedPieceHash = null; // Track the last moved piece
public Move computeBestMove(Board board) { public Move computeBestMove(Board board) {
// Stop if only one king is left // Count kings
int kingCount = 0; int kingCount = 0;
for (Piece piece : board.getPieces()) { for (Piece piece : board.getPieces()) {
if (piece.getType() == PieceType.King) kingCount++; if (piece.getType() == PieceType.King) kingCount++;
} }
if (kingCount <= 1) {
return null;
}
ArrayList<Piece> pieces = board.getPieces(); ArrayList<Piece> pieces = board.getPieces();
boolean isWhite = board.isTurnWhite(); boolean isWhite = board.isTurnWhite();
@ -33,19 +30,20 @@ public class AutoPlayer {
ArrayList<Move> moves = board.getLegalMoves(piece); ArrayList<Move> moves = board.getLegalMoves(piece);
for (Move move : moves) { for (Move move : moves) {
// Prevent king captures: simulate move and skip if enemy king would be removed
Board copy = new Board(board); Board copy = new Board(board);
copy.playMove(move); copy.playMove(move);
Piece enemyKing = copy.findKing(!isWhite); int kingsAfterMove = 0;
if (enemyKing == null) { for (Piece p : copy.getPieces()) {
// Move that captures the king (not standard chess, but per your requirements) if (p.getType() == PieceType.King) kingsAfterMove++;
// Remember which piece makes this move
bestMoves.clear();
bestMoves.add(move);
movePieceHashes.clear();
movePieceHashes.add(pieceHash);
bestPriority = Integer.MAX_VALUE;
break;
} }
if (kingsAfterMove < 2) {
// This move would remove a king, so stop AI completely
System.out.println("Game Over! Attempted king capture. AutoPlayer will stop.");
return null;
}
Piece enemyKing = copy.findKing(!isWhite);
// Manhattan distance from this piece (after move) to enemy king // Manhattan distance from this piece (after move) to enemy king
int dist = Math.abs(move.getToX() - enemyKing.getX()) + Math.abs(move.getToY() - enemyKing.getY()); int dist = Math.abs(move.getToX() - enemyKing.getX()) + Math.abs(move.getToY() - enemyKing.getY());
int priority = -dist; int priority = -dist;
@ -68,7 +66,11 @@ public class AutoPlayer {
} }
} }
} }
if (bestMoves.isEmpty()) return null; if (bestMoves.isEmpty()) {
System.out.println("Game Over! No legal moves for autoplayer.");
// Optionally: call a game over method on the board or game object here
return null;
}
// Randomly pick among best moves // Randomly pick among best moves
Random rand = new Random(); Random rand = new Random();
int idx = rand.nextInt(bestMoves.size()); int idx = rand.nextInt(bestMoves.size());
@ -77,7 +79,7 @@ public class AutoPlayer {
return bestMoves.get(idx); return bestMoves.get(idx);
} }
// Optional: Call this after a human move to reset tracking // Call this after a human move to reset tracking
public void resetLastMovedPiece() { public void resetLastMovedPiece() {
lastMovedPieceHash = null; lastMovedPieceHash = null;
} }