private Card chooseCardOnStack(SpellAbility sa, Player ai, Game game) {
for (SpellAbilityStackInstance si : game.getStack()) {
final Card source = si.getSourceCard();
final SpellAbility abilityOnStack = si.getSpellAbility(true);
if (sa.hasParam("Choices")
&& !abilityOnStack.getHostCard().isValid(sa.getParam("Choices"), ai, sa.getHostCard())) {
continue;
}
final ApiType threatApi = abilityOnStack.getApi();
if (threatApi != ApiType.DealDamage && threatApi != ApiType.DamageAll) {
continue;
}
List<? extends GameObject> objects = getTargets(abilityOnStack);
if (!abilityOnStack.usesTargeting()
&& !abilityOnStack.hasParam("Defined")
&& abilityOnStack.hasParam("ValidPlayers"))
objects =
AbilityUtils.getDefinedPlayers(
source, abilityOnStack.getParam("ValidPlayers"), abilityOnStack);
if (!objects.contains(ai) || abilityOnStack.hasParam("NoPrevention")) {
continue;
}
int dmg =
AbilityUtils.calculateAmount(source, abilityOnStack.getParam("NumDmg"), abilityOnStack);
if (ComputerUtilCombat.predictDamageTo(ai, dmg, source, false) <= 0) {
continue;
}
return source;
}
return null;
}
/* (non-Javadoc)
* @see forge.card.abilityfactory.SpellAiLogic#canPlayAI(forge.game.player.Player, java.util.Map, forge.card.spellability.SpellAbility)
*/
@Override
protected boolean canPlayAI(final Player ai, SpellAbility sa) {
// TODO: AI Support! Currently this is copied from AF ChooseCard.
// When implementing AI, I believe AI also needs to be made aware of the damage sources
// chosen
// to be prevented (e.g. so the AI doesn't attack with a creature that will not deal any
// damage
// to the player because a CoP was pre-activated on it - unless, of course, there's
// another
// possible reason to attack with that creature).
final Card host = sa.getHostCard();
final Cost abCost = sa.getPayCosts();
final Card source = sa.getHostCard();
if (abCost != null) {
// AI currently disabled for these costs
if (!ComputerUtilCost.checkLifeCost(ai, abCost, source, 4, null)) {
return false;
}
if (!ComputerUtilCost.checkDiscardCost(ai, abCost, source)) {
return false;
}
if (!ComputerUtilCost.checkSacrificeCost(ai, abCost, source)) {
return false;
}
if (!ComputerUtilCost.checkRemoveCounterCost(abCost, source)) {
return false;
}
}
final TargetRestrictions tgt = sa.getTargetRestrictions();
if (tgt != null) {
sa.resetTargets();
if (sa.canTarget(ai.getOpponent())) {
sa.getTargets().add(ai.getOpponent());
} else {
return false;
}
}
if (sa.hasParam("AILogic")) {
final Game game = ai.getGame();
if (sa.getParam("AILogic").equals("NeedsPrevention")) {
if (!game.getStack().isEmpty()) {
final SpellAbility topStack = game.getStack().peekAbility();
if (sa.hasParam("Choices")
&& !topStack.getHostCard().isValid(sa.getParam("Choices"), ai, source)) {
return false;
}
final ApiType threatApi = topStack.getApi();
if (threatApi != ApiType.DealDamage && threatApi != ApiType.DamageAll) {
return false;
}
final Card threatSource = topStack.getHostCard();
List<? extends GameObject> objects = getTargets(topStack);
if (!topStack.usesTargeting()
&& topStack.hasParam("ValidPlayers")
&& !topStack.hasParam("Defined")) {
objects =
AbilityUtils.getDefinedPlayers(
threatSource, topStack.getParam("ValidPlayers"), topStack);
}
if (!objects.contains(ai) || topStack.hasParam("NoPrevention")) {
return false;
}
int dmg =
AbilityUtils.calculateAmount(threatSource, topStack.getParam("NumDmg"), topStack);
if (ComputerUtilCombat.predictDamageTo(ai, dmg, threatSource, false) <= 0) {
return false;
}
return true;
}
if (game.getPhaseHandler().getPhase() != PhaseType.COMBAT_DECLARE_BLOCKERS) {
return false;
}
CardCollectionView choices = game.getCardsIn(ZoneType.Battlefield);
if (sa.hasParam("Choices")) {
choices =
CardLists.getValidCards(choices, sa.getParam("Choices"), host.getController(), host);
}
final Combat combat = game.getCombat();
choices =
CardLists.filter(
choices,
new Predicate<Card>() {
@Override
public boolean apply(final Card c) {
if (combat == null || !combat.isAttacking(c, ai) || !combat.isUnblocked(c)) {
return false;
}
return ComputerUtilCombat.damageIfUnblocked(c, ai, combat, true) > 0;
}
});
if (choices.isEmpty()) {
return false;
}
}
}
return true;
}