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package mage.abilities.keyword;
import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.SpellAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.costs.AdjustingSourceCosts;
import mage.cards.Card;
import mage.constants.Outcome;
import mage.constants.Zone;
import mage.filter.FilterCard;
import mage.game.Game;
import mage.players.Player;
import mage.target.Target;
import mage.target.common.TargetCardInYourGraveyard;
import mage.util.CardUtil;
/**
* 702.65. Delve
* 702.65a Delve is a static ability that functions while the spell with delve is on the stack.
* “Delve” means “For each generic mana in this spell’s total cost, you may exile a card
* from your graveyard rather than pay that mana.” The delve ability isn’t an additional
* or alternative cost and applies only after the total cost of the spell with delve is
* determined.
* 702.65b Multiple instances of delve on the same spell are redundant.
*
* * The rules for delve have changed slightly since it was last in an expansion. Previously, delve
* reduced the cost to cast a spell. Under the current rules, you exile cards from your graveyard
* at the same time you pay the spell’s cost. Exiling a card this way is simply another way to pay
* that cost.
* * Delve doesn’t change a spell’s mana cost or converted mana cost. For example, Dead Drop’s converted
* mana cost is 10 even if you exiled three cards to cast it.
* * You can’t exile cards to pay for the colored mana requirements of a spell with delve.
* * You can’t exile more cards than the generic mana requirement of a spell with delve. For example,
* you can’t exile more than nine cards from your graveyard to cast Dead Drop.
* * Because delve isn’t an alternative cost, it can be used in conjunction with alternative costs.
*
* @author LevelX2
*
* TODO: Change card exiling to a way to pay mana costs, now it's maybe not passible to pay costs from effects that
* increase the mana costs.
*/
public class DelveAbility extends SimpleStaticAbility implements AdjustingSourceCosts {
public DelveAbility() {
super(Zone.STACK, null);
this.setRuleAtTheTop(true);
}
public DelveAbility(final DelveAbility ability) {
super(ability);
}
@Override
public DelveAbility copy() {
return new DelveAbility(this);
}
@Override
public void adjustCosts(Ability ability, Game game) {
Player player = game.getPlayer(controllerId);
if (player == null || !(ability instanceof SpellAbility)) {
return;
}
Target target = new TargetCardInYourGraveyard(1, Integer.MAX_VALUE, new FilterCard());
target.setTargetName("cards to delve from your graveyard");
if (!target.canChoose(sourceId, controllerId, game)) {
return;
}
if (!CardUtil.isCheckPlayableMode(ability) && player.chooseUse(Outcome.Detriment, "Delve cards from your graveyard?", game)) {
player.chooseTarget(Outcome.Detriment, target, ability, game);
if (target.getTargets().size() > 0) {
int adjCost = 0;
for (UUID cardId: target.getTargets()) {
Card card = game.getCard(cardId);
if (card == null) {
continue;
}
player.moveCardToExileWithInfo(card, null, "", getSourceId(), game, Zone.GRAVEYARD);
++adjCost;
}
game.informPlayers(new StringBuilder("Delve: ").append(player.getName()).append(" exiled ")
.append(adjCost).append(" card").append(adjCost != 1?"s":"").append(" from his or her graveyard").toString());
CardUtil.adjustCost((SpellAbility)ability, adjCost);
}
}
}
@Override
public String getRule() {
return "Delve <i>(You may exile any number of cards from your graveyard as you cast this spell. It costs {1} less to cast for each card exiled this way.)</i>";
}
}