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 *        of conditions and the following disclaimer in the documentation and/or other materials
 *        provided with the distribution.
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package mage.cards.n;

import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.effects.OneShotEffect;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.cards.Cards;
import mage.cards.CardsImpl;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.Zone;
import mage.filter.FilterCard;
import mage.game.Game;
import mage.players.Player;
import mage.target.TargetCard;
import mage.target.TargetPlayer;

/**
 *
 * @author KholdFuzion

 */
public class NaturalSelection extends CardImpl {

    public NaturalSelection(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.INSTANT},"{G}");


        // Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle his or her library.
        this.getSpellAbility().addEffect(new NaturalSelectionEffect());
        this.getSpellAbility().addTarget(new TargetPlayer());
    }

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

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

class  NaturalSelectionEffect extends OneShotEffect {

    public  NaturalSelectionEffect() {
        super(Outcome.DrawCard);
        this.staticText = "look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle his or her library.";
    }

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        Player you = game.getPlayer(source.getControllerId());
        Player player = game.getPlayer(source.getFirstTarget());
        if (player == null || you == null) {
            return false;
        }
        Cards cards = new CardsImpl();
        int count = Math.min(player.getLibrary().size(), 3);
        for (int i = 0; i < count; i++) {
            Card card = player.getLibrary().removeFromTop(game);
            if (card != null) {
                cards.add(card);
            }
        }

        you.lookAtCards("Natural Selection", cards, game);

        TargetCard target = new TargetCard(Zone.LIBRARY, new FilterCard("card to put on the top of target player's library"));
        while (player.canRespond() && cards.size() > 1) {
            you.choose(Outcome.Neutral, cards, target, game);
            Card card = cards.get(target.getFirstTarget(), game);
            if (card != null) {
                cards.remove(card);
                card.moveToZone(Zone.LIBRARY, source.getSourceId(), game, true);
            }
            target.clearChosen();
        }
        if (cards.size() == 1) {
            Card card = cards.get(cards.iterator().next(), game);
            card.moveToZone(Zone.LIBRARY, source.getSourceId(), game, true);
        }
        if (you.chooseUse(Outcome.Neutral, "You may have that player shuffle his or her library", source, game)){
            player.shuffleLibrary(source, game);
        }
        return true;
    }
}