foul-magics/Mage.Sets/src/mage/sets/fallenempires/Seasinger.java

/*
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package mage.sets.fallenempires;

import java.util.UUID;
import mage.Constants;
import mage.Constants.CardType;
import mage.Constants.Rarity;
import mage.Constants.TargetController;
import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.StateTriggeredAbility;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.effects.common.SacrificeSourceEffect;
import mage.cards.CardImpl;
import mage.filter.FilterPermanent;
import mage.filter.predicate.mageobject.SubtypePredicate;
import mage.abilities.common.SkipUntapOptionalAbility;
import mage.abilities.condition.Condition;
import mage.abilities.condition.common.ControlsPermanentCondition;
import mage.abilities.costs.common.TapSourceCost;
import mage.abilities.decorator.ConditionalContinousEffect;
import mage.abilities.effects.common.continious.GainControlTargetEffect;
import mage.filter.common.FilterCreaturePermanent;
import mage.filter.common.FilterLandPermanent;
import mage.filter.predicate.Predicate;
import mage.filter.predicate.mageobject.CardIdPredicate;
import mage.filter.predicate.permanent.ControllerIdPredicate;
import mage.filter.predicate.permanent.ControllerPredicate;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.target.common.TargetCreaturePermanent;

/**
 *
 * @author jeffwadsworth
 */
public class Seasinger extends CardImpl<Seasinger> {

    final private static String rule = "Gain control of target creature whose controller controls an Island for as long as you control Seasinger and Seasinger remains tapped";
    final private static FilterPermanent islandYouControl = new FilterPermanent("Island");
    final private static FilterCreaturePermanent creatureWhoseControllerControlsIsland = new FilterCreaturePermanent("creature whose controller controls an island");

    static {
        islandYouControl.add(new SubtypePredicate("Island"));
        islandYouControl.add(new ControllerPredicate(TargetController.YOU));
    }

    public Seasinger(UUID ownerId) {
        super(ownerId, 52, "Seasinger", Rarity.UNCOMMON, new CardType[]{CardType.CREATURE}, "{1}{U}{U}");
        this.expansionSetCode = "FEM";
        this.subtype.add("Merfolk");

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

        FilterPermanent seasinger = new FilterPermanent();
        seasinger.add(new ControllerPredicate(Constants.TargetController.YOU));
        seasinger.add(new CardIdPredicate(this.getId()));

        // When you control no Islands, sacrifice Seasinger.
        this.addAbility(new SeasingerTriggeredAbility());

        // You may choose not to untap Seasinger during your untap step.
        this.addAbility(new SkipUntapOptionalAbility());

        // {tap}: Gain control of target creature whose controller controls an Island for as long as you control Seasinger and Seasinger remains tapped.
        ConditionalContinousEffect effect = new ConditionalContinousEffect(new GainControlTargetEffect(Constants.Duration.Custom), new ControlsPermanentCondition(seasinger, ControlsPermanentCondition.CountType.EQUAL_TO, 1, TappedCondition.getInstance()), rule);
        Ability ability = new SimpleActivatedAbility(Constants.Zone.BATTLEFIELD, effect, new TapSourceCost());
        creatureWhoseControllerControlsIsland.add(new ControllerControlsIslandPredicate());
        ability.addTarget(new TargetCreaturePermanent(creatureWhoseControllerControlsIsland));
        this.addAbility(ability);
    }

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

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

class ControllerControlsIslandPredicate implements Predicate<Permanent> {

    @Override
    public boolean apply(Permanent input, Game game) {
        FilterLandPermanent islandControlledByTargetCreatureController = new FilterLandPermanent("Island");
        islandControlledByTargetCreatureController.add(new SubtypePredicate("Island"));
        UUID controllerId = input.getControllerId();
        islandControlledByTargetCreatureController.add(new ControllerIdPredicate(controllerId));
        return !game.getBattlefield().getAllActivePermanents(islandControlledByTargetCreatureController, game).isEmpty();
    }

    @Override
    public String toString() {
        return "Controls an island";
    }
}

class SeasingerTriggeredAbility extends StateTriggeredAbility<SeasingerTriggeredAbility> {

    public SeasingerTriggeredAbility() {
        super(Constants.Zone.BATTLEFIELD, new SacrificeSourceEffect());
    }

    public SeasingerTriggeredAbility(final SeasingerTriggeredAbility ability) {
        super(ability);
    }

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

    @Override
    public boolean checkTrigger(GameEvent event, Game game) {
        for (Permanent perm : game.getBattlefield().getAllActivePermanents(controllerId)) {
            if (perm.getSubtype().contains("Island")) {
                return false;
            }
        }
        return true;
    }

    @Override
    public String getRule() {
        return "When you control no islands, sacrifice {this}.";
    }
}

class TappedCondition implements Condition {

    private static TappedCondition fInstance = new TappedCondition();

    public static Condition getInstance() {
        return fInstance;
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Permanent seasinger = game.getBattlefield().getPermanent(source.getSourceId());
        if (seasinger != null) {
            return seasinger.isTapped();
        }
        return false;
    }
}