foul-magics/Mage.Sets/src/mage/cards/c/CreamOfTheCrop.java

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package mage.cards.c;

import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldControlledTriggeredAbility;
import mage.abilities.effects.OneShotEffect;
import mage.cards.*;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.SetTargetPointer;
import mage.constants.Zone;
import mage.filter.FilterCard;
import mage.filter.StaticFilters;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.TargetCard;
import mage.target.common.TargetCardInHand;
import mage.target.targetpointer.FixedTarget;

/**
 *
 * @author emerald000
 */
public class CreamOfTheCrop extends CardImpl {

    public CreamOfTheCrop(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{1}{G}");

        // Whenever a creature enters the battlefield under your control, you may look at the top X cards of your library, where X is that creature's power. If you do, put one of those cards on top of your library and the rest on the bottom of your library in any order.
        this.addAbility(new EntersBattlefieldControlledTriggeredAbility(
                Zone.BATTLEFIELD, new CreamOfTheCropEffect(),
                StaticFilters.FILTER_PERMANENT_CREATURE, true, SetTargetPointer.PERMANENT,
                "Whenever a creature enters the battlefield under your control, you may look at the top X cards of your library, where X is that creature's power. If you do, put one of those cards on top of your library and the rest on the bottom of your library in any order"));
    }

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

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

class CreamOfTheCropEffect extends OneShotEffect {

    CreamOfTheCropEffect() {
        super(Outcome.Benefit);
        this.staticText = "look at the top X cards of your library, where X is that creature's power. If you do, put one of those cards on top of your library and the rest on the bottom of your library in any order";
    }

    CreamOfTheCropEffect(final CreamOfTheCropEffect effect) {
        super(effect);
    }

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

    @Override
    public boolean apply(Game game, Ability source) {
        Player player = game.getPlayer(source.getControllerId());
        Permanent permanent = ((FixedTarget) getTargetPointer()).getTargetedPermanentOrLKIBattlefield(game);
        if (player != null && permanent != null) {
            int numLooked = Math.min(permanent.getPower().getValue(), player.getLibrary().size());
            if (numLooked > 0) {
                Cards cards = new CardsImpl();
                for (int i = 0; i < numLooked; i++) {
                    cards.add(player.getLibrary().removeFromTop(game));
                }
                TargetCard target = new TargetCardInHand(new FilterCard("card to put on top of your library"));
                player.choose(Outcome.Benefit, cards, target, game);
                Card card = cards.get(target.getFirstTarget(), game);
                cards.remove(card);
                player.moveCardToLibraryWithInfo(card, source.getSourceId(), game, Zone.LIBRARY, true, false);
                player.putCardsOnBottomOfLibrary(cards, game, source, true);
            }
            return true;
        }
        return false;
    }
}