protected int simulateAttackers(
Game game,
SimulationNode2 node,
UUID attackerId,
int depth,
int alpha,
int beta,
boolean counter) {
if (ALLOW_INTERRUPT && Thread.interrupted()) {
Thread.currentThread().interrupt();
logger.debug("interrupted");
return GameStateEvaluator2.evaluate(playerId, game);
}
Integer val = null;
SimulationNode2 bestNode = null;
SimulatedPlayer2 attacker = (SimulatedPlayer2) game.getPlayer(attackerId);
UUID defenderId = game.getOpponents(attackerId).iterator().next();
if (logger.isDebugEnabled()) {
logger.debug(
attacker.getName()
+ "'s possible attackers: "
+ attacker.getAvailableAttackers(defenderId, game));
}
for (Combat engagement : attacker.addAttackers(game)) {
if (logger.isDebugEnabled()) {
logger.debug(
"Sim Attackers: "
+ engagement.getAttackers()
+ ", blockers: "
+ engagement.getBlockers());
}
if (alpha >= beta) {
logger.debug("Sim Attackers -- pruning attackers");
break;
}
Game sim = game.copy();
for (CombatGroup group : engagement.getGroups()) {
for (UUID attackId : group.getAttackers()) {
sim.getPlayer(attackerId).declareAttacker(attackId, defenderId, sim, false);
}
}
sim.fireEvent(
GameEvent.getEvent(GameEvent.EventType.DECLARED_ATTACKERS, attackerId, attackerId));
SimulationNode2 newNode = new SimulationNode2(node, sim, depth, attackerId);
if (logger.isDebugEnabled()) {
logger.debug("Sim attack for player:" + game.getPlayer(attackerId).getName());
}
sim.checkStateAndTriggered();
while (!sim.getStack().isEmpty()) {
sim.getStack().resolve(sim);
logger.debug("Sim attack: resolving triggered abilities");
sim.applyEffects();
}
sim.fireEvent(
GameEvent.getEvent(
GameEvent.EventType.DECLARE_ATTACKERS_STEP_POST,
sim.getActivePlayerId(),
sim.getActivePlayerId()));
Combat simCombat = sim.getCombat().copy();
sim.getPhase().setStep(new DeclareBlockersStep());
val = simulateCombat(sim, newNode, depth - 1, alpha, beta, counter);
if (!attackerId.equals(playerId)) {
if (val < beta) {
beta = val;
bestNode = newNode;
bestNode.setScore(val);
if (newNode.getChildren().size() > 0) {
bestNode.setCombat(newNode.getChildren().get(0).getCombat());
}
}
} else {
if (val > alpha) {
alpha = val;
bestNode = newNode;
bestNode.setScore(val);
if (newNode.getChildren().size() > 0) {
bestNode.setCombat(newNode.getChildren().get(0).getCombat());
}
}
}
}
if (val == null) {
val = GameStateEvaluator2.evaluate(playerId, game);
}
if (bestNode != null) {
node.children.clear();
node.children.add(bestNode);
node.setScore(bestNode.getScore());
}
if (logger.isDebugEnabled()) {
logger.debug(
"Sim attackers: returning score: "
+ val
+ " depth:"
+ depth
+ " for player:"
+ game.getPlayer(node.getPlayerId()).getName());
}
return val;
}
