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package mage.cards.u;

import java.util.UUID;
import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldAllTriggeredAbility;
import mage.abilities.effects.OneShotEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import static mage.cards.u.UnstableShapeshifter.filterAnotherCreature;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Outcome;
import mage.constants.SetTargetPointer;
import mage.constants.Zone;
import mage.filter.common.FilterCreaturePermanent;
import mage.filter.predicate.permanent.AnotherPredicate;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.util.functions.EmptyApplyToPermanent;

/**
 *
 * @author HCrescent
 */
public class UnstableShapeshifter extends CardImpl {

    public final static FilterCreaturePermanent filterAnotherCreature = new FilterCreaturePermanent("another creature");

    static {
        filterAnotherCreature.add(new AnotherPredicate());
    }

    public UnstableShapeshifter(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{U}");
        this.subtype.add("Shapeshifter");

        this.power = new MageInt(0);
        this.toughness = new MageInt(1);

        // Whenever another creature enters the battlefield, Unstable Shapeshifter becomes a copy of that creature and gains this ability.
        this.addAbility(new EntersBattlefieldAllTriggeredAbility(Zone.BATTLEFIELD, new UnstableShapeshifterEffect(), filterAnotherCreature, false, SetTargetPointer.PERMANENT, ""));
    }

    public UnstableShapeshifter(final UnstableShapeshifter card) {
        super(card);
    }

    @Override
    public UnstableShapeshifter copy() {
        return new UnstableShapeshifter(this);
    }
}

class UnstableShapeshifterEffect extends OneShotEffect {

    public UnstableShapeshifterEffect() {
        super(Outcome.Copy);
        this.staticText = "{this} becomes a copy of that creature and gains this ability";
    }

    public UnstableShapeshifterEffect(final UnstableShapeshifterEffect effect) {
        super(effect);
    }

    @Override
    public UnstableShapeshifterEffect copy() {
        return new UnstableShapeshifterEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Permanent permanent = game.getPermanent(source.getSourceId());
        Permanent targetCreature = game.getPermanentOrLKIBattlefield(getTargetPointer().getFirst(game, source));
        if (targetCreature != null && permanent != null) {
            Permanent blueprintPermanent = game.copyPermanent(Duration.Custom, targetCreature, permanent.getId(), source, new EmptyApplyToPermanent());
            blueprintPermanent.addAbility(new EntersBattlefieldAllTriggeredAbility(Zone.BATTLEFIELD,
                    new UnstableShapeshifterEffect(), filterAnotherCreature, false, SetTargetPointer.PERMANENT, ""), game);
            return true;
        }
        return false;
    }
}