public List<Combat> addAttackers(Game game) {
Map<Integer, Combat> engagements = new HashMap<Integer, Combat>();
// useful only for two player games - will only attack first opponent
UUID defenderId = game.getOpponents(playerId).iterator().next();
List<Permanent> attackersList = super.getAvailableAttackers(defenderId, game);
// use binary digits to calculate powerset of attackers
int powerElements = (int) Math.pow(2, attackersList.size());
StringBuilder binary = new StringBuilder();
for (int i = powerElements - 1; i >= 0; i--) {
Game sim = game.copy();
binary.setLength(0);
binary.append(Integer.toBinaryString(i));
while (binary.length() < attackersList.size()) {
binary.insert(0, "0");
}
for (int j = 0; j < attackersList.size(); j++) {
if (binary.charAt(j) == '1') {
setStoredBookmark(
sim
.bookmarkState()); // makes it possible to UNDO a declared attacker with costs
// from e.g. Propaganda
if (!sim.getCombat()
.declareAttacker(attackersList.get(j).getId(), defenderId, playerId, sim)) {
sim.undo(playerId);
}
}
}
if (engagements.put(sim.getCombat().getValue().hashCode(), sim.getCombat()) != null) {
logger.debug("simulating -- found redundant attack combination");
} else if (logger.isDebugEnabled()) {
logger.debug("simulating -- attack:" + sim.getCombat().getGroups().size());
}
}
return new ArrayList<Combat>(engagements.values());
}
@Override
public void selectAttackers(Game game, UUID attackingPlayerId) {
// useful only for two player games - will only attack first opponent
// logger.info("select attackers");
UUID defenderId = game.getOpponents(playerId).iterator().next();
List<Permanent> attackersList = super.getAvailableAttackers(defenderId, game);
// use binary digits to calculate powerset of attackers
int powerElements = (int) Math.pow(2, attackersList.size());
int value = rnd.nextInt(powerElements);
StringBuilder binary = new StringBuilder();
binary.append(Integer.toBinaryString(value));
while (binary.length() < attackersList.size()) {
binary.insert(0, "0"); // pad with zeros
}
for (int i = 0; i < attackersList.size(); i++) {
if (binary.charAt(i) == '1') {
setStoredBookmark(
game
.bookmarkState()); // makes it possible to UNDO a declared attacker with costs from
// e.g. Propaganda
if (!game.getCombat()
.declareAttacker(attackersList.get(i).getId(), defenderId, playerId, game)) {
game.undo(playerId);
}
}
}
actionCount++;
}