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package mage.cards.c;
import mage.abilities.Ability;
import mage.abilities.condition.Condition;
import mage.abilities.costs.AlternativeCostSourceAbility;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.WatcherScope;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.events.GameEvent.EventType;
import mage.game.permanent.Permanent;
import mage.game.permanent.token.SnakeToken;
import mage.game.stack.StackObject;
import mage.watchers.Watcher;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;
/**
* @author Rafbill
*/
public class CobraTrap extends CardImpl {
public CobraTrap(UUID ownerId, CardSetInfo setInfo) {
super(ownerId, setInfo, new CardType[]{CardType.INSTANT}, "{4}{G}{G}");
this.subtype.add("Trap");
// If a noncreature permanent under your control was destroyed this turn by a spell or ability an opponent controlled, you may pay {G} rather than pay Cobra Trap's mana cost.
this.addAbility(new AlternativeCostSourceAbility(new ManaCostsImpl("{G}"), CobraTrapCondition.instance), new CobraTrapWatcher());
// Create four 1/1 green Snake creature tokens.
this.getSpellAbility().addEffect(new CreateTokenEffect(new SnakeToken(), 4));
}
public CobraTrap(final CobraTrap card) {
super(card);
}
@Override
public CobraTrap copy() {
return new CobraTrap(this);
}
}
enum CobraTrapCondition implements Condition {
instance;
@Override
public boolean apply(Game game, Ability source) {
CobraTrapWatcher watcher = (CobraTrapWatcher) game.getState().getWatchers().get(CobraTrapWatcher.class.getSimpleName());
return watcher != null && watcher.conditionMet(source.getControllerId());
}
@Override
public String toString() {
return "If a noncreature permanent under your control was destroyed this turn by a spell or ability an opponent controlled";
}
}
class CobraTrapWatcher extends Watcher {
Set<UUID> players = new HashSet<>();
public CobraTrapWatcher() {
super(CobraTrapWatcher.class.getSimpleName(), WatcherScope.GAME);
}
public CobraTrapWatcher(final CobraTrapWatcher watcher) {
super(watcher);
}
@Override
public CobraTrapWatcher copy() {
return new CobraTrapWatcher(this);
}
@Override
public void watch(GameEvent event, Game game) {
if (event.getType() == EventType.DESTROYED_PERMANENT) {
Permanent perm = (Permanent) game.getPermanentOrLKIBattlefield(event.getTargetId()); // can regenerate or be indestructible
if (perm != null && !perm.isCreature()) {
if (!game.getStack().isEmpty()) {
StackObject spell = game.getStack().getStackObject(event.getSourceId());
if (spell != null && game.getOpponents(perm.getControllerId()).contains(spell.getControllerId())) {
players.add(perm.getControllerId());
}
}
}
}
}
@Override
public void reset() {
super.reset();
players.clear();
}
public boolean conditionMet(UUID playerId) {
return players.contains(playerId);
}
}