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package mage.sets.zendikar;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import mage.constants.CardType;
import mage.constants.Rarity;
import mage.abilities.Ability;
import mage.abilities.costs.AlternativeCostImpl;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.common.ReturnToHandTargetEffect;
import mage.cards.CardImpl;
import mage.constants.WatcherScope;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.target.common.TargetCreaturePermanent;
import mage.watchers.Watcher;
/**
*
* @author jeffwadsworth
*/
public class WhiplashTrap extends CardImpl {
public WhiplashTrap(UUID ownerId) {
super(ownerId, 77, "Whiplash Trap", Rarity.COMMON, new CardType[]{CardType.INSTANT}, "{3}{U}{U}");
this.expansionSetCode = "ZEN";
this.subtype.add("Trap");
this.color.setBlue(true);
// If an opponent had two or more creatures enter the battlefield under his or her control this turn, you may pay {U} rather than pay Whiplash Trap's mana cost.
this.getSpellAbility().addAlternativeCost(new WhiplashAlternativeCost());
this.addWatcher(new WhiplashTrapWatcher());
// Return two target creatures to their owners' hands.
this.getSpellAbility().addEffect(new ReturnToHandTargetEffect());
this.getSpellAbility().addTarget(new TargetCreaturePermanent(2));
}
public WhiplashTrap(final WhiplashTrap card) {
super(card);
}
@Override
public WhiplashTrap copy() {
return new WhiplashTrap(this);
}
}
class WhiplashTrapWatcher extends Watcher {
private Map<UUID, Integer> amountOfCreaturesPlayedThisTurn = new HashMap<UUID, Integer>();
public WhiplashTrapWatcher() {
super("WhiplashTrapWatcher", WatcherScope.GAME);
}
public WhiplashTrapWatcher(final WhiplashTrapWatcher watcher) {
super(watcher);
for (Map.Entry<UUID, Integer> entry : watcher.amountOfCreaturesPlayedThisTurn.entrySet()) {
amountOfCreaturesPlayedThisTurn.put(entry.getKey(), entry.getValue());
}
}
@Override
public WhiplashTrapWatcher copy() {
return new WhiplashTrapWatcher(this);
}
@Override
public void watch(GameEvent event, Game game) {
if (event.getType() == GameEvent.EventType.ENTERS_THE_BATTLEFIELD) {
Permanent perm = game.getPermanent(event.getTargetId());
if (perm.getCardType().contains(CardType.CREATURE)) {
Integer amount = amountOfCreaturesPlayedThisTurn.get(perm.getControllerId());
if (amount == null) {
amount = Integer.valueOf(1);
} else {
++amount;
}
amountOfCreaturesPlayedThisTurn.put(perm.getControllerId(), amount);
}
}
}
public int maxCreaturesAnOpponentPlayedThisTurn(UUID playerId, Game game) {
int maxCreatures = 0;
for (UUID opponentId : game.getOpponents(playerId)) {
Integer amount = amountOfCreaturesPlayedThisTurn.get(opponentId);
if (amount != null && amount.intValue() > maxCreatures) {
maxCreatures = amount.intValue();
}
}
return maxCreatures;
}
@Override
public void reset() {
super.reset();
amountOfCreaturesPlayedThisTurn.clear();
}
}
class WhiplashAlternativeCost extends AlternativeCostImpl {
public WhiplashAlternativeCost() {
super("you may pay {U} rather than pay Whiplash Trap's mana cost");
this.add(new ManaCostsImpl("{U}"));
}
public WhiplashAlternativeCost(final WhiplashAlternativeCost cost) {
super(cost);
}
@Override
public WhiplashAlternativeCost copy() {
return new WhiplashAlternativeCost(this);
}
@Override
public boolean isAvailable(Game game, Ability source) {
WhiplashTrapWatcher watcher = (WhiplashTrapWatcher) game.getState().getWatchers().get("WhiplashTrapWatcher");
if (watcher != null && watcher.maxCreaturesAnOpponentPlayedThisTurn(source.getControllerId(), game) >= 2) {
return true;
}
return false;
}
@Override
public String getText() {
return "If an opponent had two or more creatures enter the battlefield under his or her control this turn, you may pay {U} rather than pay Whiplash Trap's mana cost";
}
}