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* Copyright 2011 BetaSteward_at_googlemail.com. All rights reserved.
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package mage.abilities.effects.common.combat;
import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.effects.RequirementEffect;
import mage.constants.Duration;
import mage.game.Game;
import mage.game.permanent.Permanent;
/**
* !! This effect does only support one target.
*
*
* http://tappedout.net/mtg-questions/must-be-blocked-if-able-effect-makes-other-attacking-creatures-essentially-unblockable/
*
* When you Declare Blockers, you choose an arrangement for your blockers,
* then check to see if there are any restrictions or requirements.
*
* If any restrictions are violated, the block is illegal. (For example,
* trying to block with Sightless Ghoul)
* If any requirements are violated, the least possible number of requirements
* must be violated, otherwise the block is illegal. (For example, your opponent
* control two creatures that he has cast Deadly Allure on, but you control only
* one creature. Blocking either one will violate a requirement, "This creature
* must be blocked this turn if able", but it will also violate the least
* possible number of requirements, thus it is legal.)
* If the block is illegal, the game state backs up and you declare blockers
* again. (Note that while you can, in some cases, circumvent requirements
* such as "This creature must be blocked" or "This creature must block
* any attacking creature" you can never circumvent restrictions: "This creature
* can't block" or "Only one creature may block this turn.")
* Because you declare ALL your blockers at once, THEN check for
* restrictions/requirements, you may block Deadly Allure'd creatures
* with only one creature, if you choose.
* This still works with Lure: This card sets up a requirement that ALL
* creatures must block it if able. Any block that violates more than
* the minimum number of requirements is still illegal.
*
* @author LevelX2
*/
public class MustBeBlockedByAtLeastOneTargetEffect extends RequirementEffect {
public MustBeBlockedByAtLeastOneTargetEffect() {
this(Duration.EndOfTurn);
}
public MustBeBlockedByAtLeastOneTargetEffect(Duration duration) {
super(duration);
staticText = "Target creature must be blocked this turn if able";
}
public MustBeBlockedByAtLeastOneTargetEffect(final MustBeBlockedByAtLeastOneTargetEffect effect) {
super(effect);
}
@Override
public boolean applies(Permanent permanent, Ability source, Game game) {
return permanent.canBlock(this.getTargetPointer().getFirst(game, source), game);
}
@Override
public boolean mustAttack(Game game) {
return false;
}
@Override
public boolean mustBlock(Game game) {
return false;
}
@Override
public UUID mustBlockAttackerIfElseUnblocked(Ability source, Game game) {
return this.getTargetPointer().getFirst(game, source);
}
@Override
public MustBeBlockedByAtLeastOneTargetEffect copy() {
return new MustBeBlockedByAtLeastOneTargetEffect(this);
}
}