@Override
public BattleResult resolveBattle(Piece attacker, Piece defender) {
if (defender.getType().equals(PieceType.FLAG)) {
state.setWinner(attacker.getColor());
return BattleResult.VICTORY;
}
if (attacker.getType().equals(PieceType.MINER) && defender.getType().equals(PieceType.BOMB)) {
return BattleResult.VICTORY;
}
if (attacker.getType().equals(PieceType.SPY) && defender.getType().equals(PieceType.MARSHAL)) {
return BattleResult.VICTORY;
}
if (attacker.getType().getRank() < defender.getType().getRank()) {
return BattleResult.VICTORY;
}
if (attacker.getType().getRank() == defender.getType().getRank()) {
return BattleResult.DRAW;
}
return BattleResult.DEFEAT;
}
@Override
public Piece makeMove(Position source, Position destination) throws StrategyException {
if (source.equals(destination)) {
throw new StrategyException("destination must be different from source");
}
if (source.isDiagonal(destination)) {
throw new StrategyException("Pieces cannot move diagonally");
}
if (!state.getBoard().isOccupied(source)) {
throw new StrategyException("source must be occupied by a piece");
}
if (state.isOver()) {
throw new StrategyException("Game is already over");
}
// change turn/dont double move
if (state.getBoard().getPieceAt(source).getColor() != state.getTurn()) {
throw new StrategyException("not your turn");
}
if (state.getTurn() == PlayerColor.RED) {
state.setTurn(PlayerColor.BLUE);
} else {
state.setTurn(PlayerColor.RED);
}
final Piece sourcePiece = state.getBoard().getPieceAt(source);
final Piece destinationPiece = state.getBoard().getPieceAt(destination);
final int distance = state.getBoard().getDistance(source, destination);
final int range = sourcePiece.getType().getRange();
if (range >= 0 && distance > range) {
throw new StrategyException("Cannot move piece farther than its range");
}
if (sourcePiece.getColor().equals(destinationPiece.getColor())) {
throw new StrategyException("Cannot move onto a friendly piece");
}
if (!state.getBoard().isPathValid(source, destination)) {
throw new StrategyException("Cannot move through occupied spaces or water");
}
BattleResult result = BattleResult.VICTORY;
if (state.getBoard().isOccupied(destination)) {
result = resolveBattle(sourcePiece, destinationPiece);
}
switch (result) {
case VICTORY:
state.getBoard().putPieceAt(destination, sourcePiece);
state.getBoard().putPieceAt(source, Piece.NULL_PIECE);
break;
case DRAW:
state.getBoard().putPieceAt(destination, Piece.NULL_PIECE);
// fallthrough
case DEFEAT:
state.getBoard().putPieceAt(source, Piece.NULL_PIECE);
break;
}
// if moves>10 end game
state.setNumMoves(state.getNumMoves() + 1);
if (state.getNumMoves() >= 10) {
state.setWinner(PlayerColor.BLUE);
}
return state.getBoard().getPieceAt(destination);
}