Package mage.abilities.keyword

Source Code of mage.abilities.keyword.BestowTypeChangingEffect

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package mage.abilities.keyword;

import mage.abilities.Ability;
import mage.abilities.SpellAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.ContinuousEffectImpl;
import mage.abilities.effects.common.AttachEffect;
import mage.abilities.effects.common.continious.SourceEffect;
import mage.cards.Card;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Layer;
import static mage.constants.Layer.TypeChangingEffects_4;
import mage.constants.Outcome;
import mage.constants.SubLayer;
import mage.constants.TimingRule;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.target.TargetPermanent;
import mage.target.common.TargetCreaturePermanent;

/**
*
* 702.102. Bestow
*
* 702.102a Bestow represents two static abilities, one that functions while the card with bestow is
* on the stack and another that functions both while it’s on stack and while it’s on the battlefield.
* “Bestow [cost]” means “You may cast this card by paying [cost] rather than its mana cost.” and “If
* you chose to pay this spell’s bestow cost, it becomes an Aura enchantment and gains enchant creature.
* These effects last until one of two things happens: this spell has an illegal target as it resolves
* and or the permanent this spell becomes, becomes unattached.” Paying a card’s bestow cost follows the
* rules for paying alternative costs in rules 601.2b and 601.2e–g.
*
* 702.102b If a spell’s controller chooses to pay its bestow cost, that player chooses a legal target
* for that Aura spell as defined by its enchant creature ability and rule 601.2c. See also rule 303.4.
*
* 702.102c A spell’s controller can’t choose to pay its bestow cost unless that player can choose a legal
* target for that spell after it becomes an Aura spell.
*
* 702.102d As an Aura spell with bestow begins resolving, if its target is illegal, the effect making
* it an Aura spell ends. It continues resolving as a creature spell and will be put onto the battlefield
* under the control of the spell’s controller. This is an exception to rule 608.3a.
*
* 702.102e If an Aura with bestow is attached to an illegal object or player, it becomes unattached.
* This is an exception to rule 704.5n.
*
* You don’t choose whether the spell is going to be an Aura spell or not until the spell is already on
* the stack. Abilities that affect when you can cast a spell, such as flash, will apply to the creature
* card in whatever zone you’re casting it from. For example, an effect that said you can cast creature
* spells as though they have flash will allow you to cast a creature card with bestow as an Aura spell
* anytime you could cast an instant.
*
* On the stack, a spell with bestow is either a creature spell or an Aura spell. It’s never both.
*
* Unlike other Aura spells, an Aura spell with bestow isn’t countered if its target is illegal as it
* begins to resolve. Rather, the effect making it an Aura spell ends, it loses enchant creature, it
* returns to being an enchantment creature spell, and it resolves and enters the battlefield as an
* enchantment creature.
*
* Unlike other Auras, an Aura with bestow isn’t put into its owner’s graveyard if it becomes unattached.
* Rather, the effect making it an Aura ends, it loses enchant creature, and it remains on the
* battlefield as an enchantment creature. It can attack (and its {T} abilities can be activated,
* if it has any) on the turn it becomes unattached if it’s been under your control continuously,
* even as an Aura, since your most recent turn began.
*
* If a permanent with bestow enters the battlefield by any method other than being cast, it will be
* an enchantment creature. You can’t choose to pay the bestow cost and have it become an Aura.
*
* Auras attached to a creature don’t become tapped when the creature becomes tapped. Except in some
* rare cases, an Aura with bestow remains untapped when it becomes unattached and becomes a creature.
*
*
* @author LevelX2
*/


public class BestowAbility extends SpellAbility {

    public BestowAbility(Card card, String manaString) {
        super(new ManaCostsImpl(manaString), card.getName() + " using bestow");
        this.timing = TimingRule.SORCERY;
        TargetPermanent auraTarget = new TargetCreaturePermanent();
        this.addTarget(auraTarget);
        this.addEffect(new AttachEffect(Outcome.BoostCreature));
        Ability ability = new SimpleStaticAbility(Zone.BATTLEFIELD, new BestowTypeChangingEffect());
        ability.setRuleVisible(false);
        card.addAbility(ability);
    }

    public BestowAbility(final BestowAbility ability) {
        super(ability);
    }

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

    @Override
    public String getRule(boolean all) {
        return getRule();
    }

    @Override
    public String getRule() {
        return "Bestow " + getManaCostsToPay().getText()+ " <i>(If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)</i>";
    }

}

class BestowTypeChangingEffect extends ContinuousEffectImpl implements SourceEffect {

    public BestowTypeChangingEffect() {
        super(Duration.WhileOnBattlefield, Outcome.BoostCreature);
    }

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

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

    @Override
    public boolean apply(Layer layer, SubLayer sublayer, Ability source, Game game) {
        Permanent permanent = game.getPermanent(source.getSourceId());
        if (permanent != null) {
            switch (layer) {
                case TypeChangingEffects_4:
                    if (sublayer == SubLayer.NA) {
                        if (permanent.getAttachedTo() == null) {
                            if (permanent.getSubtype().contains("Aura")) {
                                permanent.getSubtype().remove("Aura");
                            }
                        } else {
                            permanent.getCardType().remove(CardType.CREATURE);
                            permanent.getSubtype().clear();
                            if (!permanent.getSubtype().contains("Aura")) {

                                permanent.getSubtype().add("Aura");
                            }
                        }
                    }
                    break;
            }
            return true;
        }
        return false;
    }

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


    @Override
    public boolean hasLayer(Layer layer) {
        return layer == Layer.TypeChangingEffects_4;
    }

}
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