package mage.abilities.keyword;
import java.io.ObjectStreamException;
import mage.abilities.Ability;
import mage.abilities.EvasionAbility;
import mage.abilities.MageSingleton;
import mage.abilities.effects.RestrictionEffect;
import mage.constants.AsThoughEffectType;
import mage.constants.Duration;
import mage.game.Game;
import mage.game.permanent.Permanent;
/**
* "Shadow" keyword
* @author Loki
*/
public class ShadowAbility extends EvasionAbility implements MageSingleton {
private static final ShadowAbility instance = new ShadowAbility();
private Object readResolve() throws ObjectStreamException {
return instance;
}
public static ShadowAbility getInstance() {
return instance;
}
private ShadowAbility() {
this.addEffect(new ShadowEffect());
}
@Override
public String getRule() {
return "Shadow <i>(This creature can block or be blocked by only creatures with shadow.)</i>";
}
@Override
public ShadowAbility copy() {
return instance;
}
}
class ShadowEffect extends RestrictionEffect implements MageSingleton {
public ShadowEffect() {
super(Duration.EndOfGame);
}
public ShadowEffect(final ShadowEffect effect) {
super(effect);
}
@Override
public boolean applies(Permanent permanent, Ability source, Game game) {
return permanent.getAbilities().containsKey(ShadowAbility.getInstance().getId());
}
@Override
public boolean canBlock(Permanent attacker, Permanent blocker, Ability source, Game game) {
return attacker.getAbilities().containsKey(ShadowAbility.getInstance().getId());
}
@Override
public boolean canBeBlocked(Permanent attacker, Permanent blocker, Ability source, Game game) {
return blocker.getAbilities().containsKey(ShadowAbility.getInstance().getId())
|| game.getContinuousEffects().asThough(blocker.getId(), AsThoughEffectType.BLOCK_SHADOW, source, blocker.getControllerId(), game);
}
@Override
public ShadowEffect copy() {
return new ShadowEffect(this);
}
}