mage/Mage.Sets/src/mage/sets/iceage/GlacialChasm.java

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package mage.sets.iceage;

import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.costs.common.PayLifeCost;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.dynamicvalue.common.StaticValue;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.ReplacementEffectImpl;
import mage.abilities.effects.common.PreventAllDamageToControllerEffect;
import mage.abilities.keyword.CumulativeUpkeepAbility;
import mage.cards.CardImpl;
import mage.constants.*;
import mage.filter.FilterPermanent;
import mage.filter.common.FilterLandPermanent;
import mage.filter.predicate.permanent.ControllerPredicate;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.Target;
import mage.target.common.TargetControlledPermanent;

import java.util.UUID;

/**
 *
 * @author Plopman
 */
public class GlacialChasm extends CardImpl {

    public GlacialChasm(UUID ownerId) {
        super(ownerId, 331, "Glacial Chasm", Rarity.UNCOMMON, new CardType[]{CardType.LAND}, "");
        this.expansionSetCode = "ICE";

        // Cumulative upkeep-Pay 2 life.
        this.addAbility(new CumulativeUpkeepAbility(new PayLifeCost(2)));
        // When Glacial Chasm enters the battlefield, sacrifice a land.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new SacrificeControllerEffect(new FilterLandPermanent(), 1, "")));
        // Creatures you control can't attack.
        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new CantAttackEffect()));
        // Prevent all damage that would be dealt to you.
        this.addAbility(new SimpleStaticAbility(Zone.BATTLEFIELD, new PreventAllDamageToControllerEffect(Duration.WhileOnBattlefield)));
    }

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

    @Override
    public GlacialChasm copy() {
        return new GlacialChasm(this);
    }
}
class SacrificeControllerEffect extends OneShotEffect{

    private FilterPermanent filter;
    private DynamicValue count;

    public SacrificeControllerEffect ( FilterPermanent filter, DynamicValue count, String preText ) {
        super(Outcome.Sacrifice);
        this.filter = filter;
        this.count = count;
        staticText = "sacrifice a land";
    }

    public SacrificeControllerEffect ( FilterPermanent filter, int count, String preText ) {
        this(filter, new StaticValue(count), preText);
    }

    public SacrificeControllerEffect ( SacrificeControllerEffect effect ) {
        super(effect);
        this.filter = effect.filter;
        this.count = effect.count;
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player player = game.getPlayer(source.getControllerId());

        if (player == null) {
            return false;
        }

        filter.add(new ControllerPredicate(TargetController.YOU));

        int amount = count.calculate(game, source, this);
        int realCount = game.getBattlefield().countAll(filter, player.getId(), game);
        amount = Math.min(amount, realCount);

        Target target = new TargetControlledPermanent(amount, amount, filter, false);

        //A spell or ability could have removed the only legal target this player
        //had, if thats the case this ability should fizzle.
        if (amount > 0 && target.canChoose(source.getSourceId(), player.getId(), game)) {
            boolean abilityApplied = false;
            while (player.isInGame() && !target.isChosen() && target.canChoose(player.getId(), game)) {
                player.choose(Outcome.Sacrifice, target, source.getSourceId(), game);
            }

            for ( int idx = 0; idx < target.getTargets().size(); idx++) {
                Permanent permanent = game.getPermanent((UUID)target.getTargets().get(idx));

                if ( permanent != null ) {
                    abilityApplied |= permanent.sacrifice(source.getSourceId(), game);
                }
            }

            return abilityApplied;
        }
        return false;
    }

    public void setAmount(DynamicValue amount) {
        this.count = amount;
    }

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

}


class CantAttackEffect extends ReplacementEffectImpl {

    public CantAttackEffect() {
        super(Duration.WhileOnBattlefield, Outcome.Detriment);
        staticText = "Creatures you control can't attack";
    }

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

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

    @Override
    public boolean apply(Game game, Ability source) {
        return true;
    }

    @Override
    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
        return true;
    }

    @Override
    public boolean applies(GameEvent event, Ability source, Game game) {
        if (event.getType() == GameEvent.EventType.DECLARE_ATTACKER && source.getControllerId().equals(event.getPlayerId())) {
            return true;
        }
        return false;
    }
}