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package mage.abilities.keyword;
import java.util.UUID;
import mage.abilities.Ability;
import mage.abilities.DelayedTriggeredAbility;
import mage.abilities.SpellAbility;
import mage.abilities.costs.Cost;
import mage.abilities.costs.VariableCost;
import mage.abilities.costs.mana.VariableManaCost;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.CreateDelayedTriggeredAbilityEffect;
import mage.abilities.effects.common.ExileSourceEffect;
import mage.cards.Card;
import mage.cards.SplitCard;
import mage.constants.Outcome;
import mage.constants.SpellAbilityType;
import mage.constants.TimingRule;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.events.ZoneChangeEvent;
import mage.players.Player;
/**
* 702.32. Flashback
*
* 702.32a. Flashback appears on some instants and sorceries. It represents two static abilities:
* one that functions while the card is in a player‘s graveyard and the other that functions
* while the card is on the stack. Flashback [cost] means, "You may cast this card from your
* graveyard by paying [cost] rather than paying its mana cost" and, "If the flashback cost
* was paid, exile this card instead of putting it anywhere else any time it would leave the
* stack." Casting a spell using its flashback ability follows the rules for paying alternative
* costs in rules 601.2b and 601.2e–g.
*
* @author nantuko
*/
public class FlashbackAbility extends SpellAbility {
private String abilityName;
public FlashbackAbility(Cost cost, TimingRule timingRule) {
super(null, "", Zone.GRAVEYARD);
this.setAdditionalCostsRuleVisible(false);
this.name = new StringBuilder("Flashback ").append(cost.getText()).toString();
this.addEffect(new FlashbackEffect());
this.addCost(cost);
this.timing = timingRule;
this.usesStack = false;
this.spellAbilityType = SpellAbilityType.BASE_ALTERNATE;
this.addEffect(new CreateDelayedTriggeredAbilityEffect(new FlashbackTriggeredAbility()));
}
public FlashbackAbility(final FlashbackAbility ability) {
super(ability);
this.spellAbilityType = ability.spellAbilityType;
this.abilityName = ability.abilityName;
}
@Override
public boolean canActivate(UUID playerId, Game game) {
if (super.canActivate(playerId, game)) {
Card card = game.getCard(getSourceId());
if (card != null) {
return card.getSpellAbility().canActivate(playerId, game);
}
}
return false;
}
@Override
public FlashbackAbility copy() {
return new FlashbackAbility(this);
}
@Override
public String getRule(boolean all) {
return this.getRule();
}
@Override
public String getRule() {
StringBuilder sbRule = new StringBuilder("Flashback");
if (costs.size() > 0) {
sbRule.append(" - ");
} else {
sbRule.append(" ");
}
if (manaCosts.size() > 0) {
sbRule.append(manaCosts.getText());
}
if (costs.size() > 0) {
sbRule.append(costs.getText());
sbRule.append(".");
}
if (abilityName != null) {
sbRule.append(" ");
sbRule.append(abilityName);
}
sbRule.append(" <i>(You may cast this card from your graveyard for its flashback cost. Then exile it.)</i>");
return sbRule.toString();
}
@Override
public void setSpellAbilityType(SpellAbilityType spellAbilityType) {
this.spellAbilityType = spellAbilityType;
}
@Override
public SpellAbilityType getSpellAbilityType() {
return this.spellAbilityType;
}
public void setAbilityName(String abilityName) {
this.abilityName = abilityName;
}
}
class FlashbackEffect extends OneShotEffect {
public FlashbackEffect() {
super(Outcome.Benefit);
staticText = "";
}
public FlashbackEffect(final FlashbackEffect effect) {
super(effect);
}
@Override
public FlashbackEffect copy() {
return new FlashbackEffect(this);
}
@Override
public boolean apply(Game game, Ability source) {
Card card = (Card) game.getObject(source.getSourceId());
if (card != null) {
Player controller = game.getPlayer(source.getControllerId());
if (controller != null) {
SpellAbility spellAbility;
switch(((FlashbackAbility) source).getSpellAbilityType()) {
case SPLIT_LEFT:
spellAbility = ((SplitCard)card).getLeftHalfCard().getSpellAbility();
break;
case SPLIT_RIGHT:
spellAbility = ((SplitCard)card).getRightHalfCard().getSpellAbility();
break;
default:
spellAbility = card.getSpellAbility();
}
spellAbility.clear();
// used if flashbacked spell has a {X} cost
int amount = source.getManaCostsToPay().getX();
if (amount == 0) {
// add variable cost like Discard X cards to get the X value to the spell
// because there is currently no way to set the x value in anotehr way, it's set for the
// x mana value to be known by the spell
for (Cost cost:source.getCosts()) {
if (cost instanceof VariableCost && cost.isPaid()) {
amount = ((VariableCost) cost).getAmount();
break;
}
}
}
if (amount > 0) {
// multiplier must be taken into account because if the base spell has {X}{X} the x value would be wrongly halfed
for (VariableCost variableCost: spellAbility.getManaCostsToPay().getVariableCosts()) {
if (variableCost instanceof VariableManaCost) {
amount = amount * ((VariableManaCost)variableCost).getMultiplier();
break;
}
}
spellAbility.getManaCostsToPay().setX(amount);
}
game.informPlayers(new StringBuilder(controller.getName()).append(" flashbacks ").append(card.getName()).toString());
spellAbility.setCostModificationActive(false); // prevents to apply cost modification twice for flashbacked spells
return controller.cast(spellAbility, game, true);
}
}
return false;
}
}
class FlashbackTriggeredAbility extends DelayedTriggeredAbility {
public FlashbackTriggeredAbility() {
super(new ExileSourceEffect());
usesStack = false;
}
public FlashbackTriggeredAbility(final FlashbackTriggeredAbility ability) {
super(ability);
}
@Override
public FlashbackTriggeredAbility copy() {
return new FlashbackTriggeredAbility(this);
}
@Override
public boolean checkTrigger(GameEvent event, Game game) {
if (event.getType() == GameEvent.EventType.ZONE_CHANGE && event.getTargetId().equals(this.sourceId)) {
ZoneChangeEvent zEvent = (ZoneChangeEvent) event;
if (zEvent.getFromZone() == Zone.STACK) {
return true;
}
}
return false;
}
@Override
public String getRule() {
return "(If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack)";
}
}