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 *        conditions and the following disclaimer.
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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.g;

import mage.abilities.Ability;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.common.TapSourceCost;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.OneShotEffect;
import mage.cards.*;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.Zone;
import mage.game.Game;
import mage.players.Player;
import mage.target.TargetPlayer;

import java.util.UUID;

/**
 *
 * @author LevelX2
 */
public class Grindstone extends CardImpl {

    public Grindstone(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId,setInfo,new CardType[]{CardType.ARTIFACT},"{1}");

        // {3}, {T}: Target player puts the top two cards of his or her library into his or her graveyard. If both cards share a color, repeat this process.
        Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new GrindstoneEffect(), new ManaCostsImpl("{3}"));
        ability.addCost(new TapSourceCost());
        ability.addTarget(new TargetPlayer());
        this.addAbility(ability);

    }

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

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

class GrindstoneEffect extends OneShotEffect {

    public GrindstoneEffect() {
        super(Outcome.Benefit);
        this.staticText = "Target player puts the top two cards of his or her library into his or her graveyard. If both cards share a color, repeat this process";
    }

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        Player targetPlayer = game.getPlayer(this.getTargetPointer().getFirst(game, source));
        boolean colorShared;
        if (targetPlayer != null) {
            int possibleIterations = targetPlayer.getLibrary().size() / 2;
            int iteration = 0;
            do {
                iteration++;
                if (iteration > possibleIterations + 20) {
                    // 801.16. If the game somehow enters a "loop" of mandatory actions, repeating a sequence of events
                    // with no way to stop, the game is a draw for each player who controls an object that's involved in
                    // that loop, as well as for each player within the range of influence of any of those players. They
                    // leave the game. All remaining players continue to play the game.
                    game.setDraw(source.getControllerId());
                    return true;
                }
                colorShared = false;
                Cards cards = new CardsImpl();
                cards.addAll(targetPlayer.getLibrary().getTopCards(game, 2));
                if (!cards.isEmpty()) {
                    Card card1 = targetPlayer.getLibrary().removeFromTop(game);
                    if (targetPlayer.getLibrary().hasCards()) {
                        colorShared = card1.getColor(game).shares(targetPlayer.getLibrary().removeFromTop(game).getColor(game));
                    }
                }
                targetPlayer.moveCards(cards, Zone.GRAVEYARD, source, game);
            } while (colorShared && targetPlayer.canRespond());
            return true;
        }
        return false;
    }
}