/*
* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
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*/
package mage.game.combat;
import mage.abilities.Ability;
import mage.abilities.effects.RequirementEffect;
import mage.abilities.effects.RestrictionEffect;
import mage.abilities.keyword.CanAttackOnlyAloneAbility;
import mage.abilities.keyword.CantAttackAloneAbility;
import mage.abilities.keyword.VigilanceAbility;
import mage.constants.Outcome;
import mage.constants.Zone;
import mage.filter.common.FilterControlledCreaturePermanent;
import mage.filter.common.FilterCreatureForCombatBlock;
import mage.filter.common.FilterPlaneswalkerPermanent;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.players.PlayerList;
import mage.target.common.TargetDefender;
import mage.util.CardUtil;
import mage.util.Copyable;
import mage.util.trace.TraceUtil;
import java.io.Serializable;
import java.util.*;
/**
* @author BetaSteward_at_googlemail.com
*/
public class Combat implements Serializable, Copyable<Combat> {
private static FilterPlaneswalkerPermanent filterPlaneswalker = new FilterPlaneswalkerPermanent();
private static FilterCreatureForCombatBlock filterBlockers = new FilterCreatureForCombatBlock();
// There are effects that let creatures assigns combat damage equal to its toughness rather than its power
private boolean useToughnessForDamage;
protected List<CombatGroup> groups = new ArrayList<>();
protected Map<UUID, CombatGroup> blockingGroups = new HashMap<>();
protected Set<UUID> defenders = new HashSet<>();
// how many creatures attack defending player
protected Map<UUID, Set<UUID>> numberCreaturesDefenderAttackedBy = new HashMap<>();
protected UUID attackerId; //the player that is attacking
// <creature that can block, <all attackers that force the creature to block it>>
protected Map<UUID, Set<UUID>> creatureMustBlockAttackers = new HashMap<>();
// which creature is forced to attack which defender(s). If set is empty, the creature can attack every possible defender
private final Map<UUID, Set<UUID>> creaturesForcedToAttack = new HashMap<>();
private int maxAttackers = Integer.MIN_VALUE;
public Combat() {
this.useToughnessForDamage = false;
}
public Combat(final Combat combat) {
this.attackerId = combat.attackerId;
for (CombatGroup group : combat.groups) {
groups.add(group.copy());
}
defenders.addAll(combat.defenders);
for (Map.Entry<UUID, CombatGroup> group : combat.blockingGroups.entrySet()) {
blockingGroups.put(group.getKey(), group.getValue());
}
this.useToughnessForDamage = combat.useToughnessForDamage;
for (Map.Entry<UUID, Set<UUID>> group : combat.numberCreaturesDefenderAttackedBy.entrySet()) {
this.numberCreaturesDefenderAttackedBy.put(group.getKey(), group.getValue());
}
for (Map.Entry<UUID, Set<UUID>> group : combat.creatureMustBlockAttackers.entrySet()) {
this.creatureMustBlockAttackers.put(group.getKey(), group.getValue());
}
for (Map.Entry<UUID, Set<UUID>> group : combat.creaturesForcedToAttack.entrySet()) {
this.creaturesForcedToAttack.put(group.getKey(), group.getValue());
}
this.maxAttackers = combat.maxAttackers;
}
public List<CombatGroup> getGroups() {
return groups;
}
public Collection<CombatGroup> getBlockingGroups() {
return blockingGroups.values();
}
public Set<UUID> getDefenders() {
return defenders;
}
public List<UUID> getAttackers() {
List<UUID> attackers = new ArrayList<>();
for (CombatGroup group : groups) {
attackers.addAll(group.attackers);
}
return attackers;
}
public List<UUID> getBlockers() {
List<UUID> blockers = new ArrayList<>();
for (CombatGroup group : groups) {
blockers.addAll(group.blockers);
}
return blockers;
}
public boolean useToughnessForDamage() {
return useToughnessForDamage;
}
public void setUseToughnessForDamage(boolean useToughnessForDamage) {
this.useToughnessForDamage = useToughnessForDamage;
}
public void reset() {
this.useToughnessForDamage = false;
}
public void clear() {
groups.clear();
blockingGroups.clear();
defenders.clear();
attackerId = null;
creatureMustBlockAttackers.clear();
numberCreaturesDefenderAttackedBy.clear();
creaturesForcedToAttack.clear();
maxAttackers = Integer.MIN_VALUE;
}
public String getValue() {
StringBuilder sb = new StringBuilder();
sb.append(attackerId).append(defenders);
for (CombatGroup group : groups) {
sb.append(group.defenderId).append(group.attackers).append(group.attackerOrder).append(group.blockers).append(group.blockerOrder);
}
return sb.toString();
}
public void setAttacker(UUID playerId) {
this.attackerId = playerId;
}
/**
* Add an additional attacker to the combat (e.g. token of Geist of Saint
* Traft) This method doesn't trigger ATTACKER_DECLARED event (as intended).
*
* @param creatureId - creature that shall be added to the combat
* @param game
* @return
*/
public boolean addAttackingCreature(UUID creatureId, Game game) {
Player player = game.getPlayer(attackerId);
if (defenders.size() == 1) {
declareAttacker(creatureId, defenders.iterator().next(), game);
return true;
} else {
TargetDefender target = new TargetDefender(defenders, creatureId);
target.setRequired(true);
player.chooseTarget(Outcome.Damage, target, null, game);
if (target.getFirstTarget() != null) {
declareAttacker(creatureId, target.getFirstTarget(), game);
return true;
}
}
return false;
}
public void selectAttackers(Game game) {
if (!game.replaceEvent(GameEvent.getEvent(GameEvent.EventType.DECLARING_ATTACKERS, attackerId, attackerId))) {
Player player = game.getPlayer(attackerId);
//20101001 - 508.1d
checkAttackRequirements(player, game);
if (!game.getPlayer(game.getActivePlayerId()).getAvailableAttackers(game).isEmpty()) {
player.selectAttackers(game, attackerId);
}
if (game.isPaused() || game.gameOver(null)) {
return;
}
checkAttackRestrictions(player, game);
resumeSelectAttackers(game);
}
}
public void resumeSelectAttackers(Game game) {
Player player = game.getPlayer(attackerId);
for (CombatGroup group : groups) {
for (UUID attacker : group.getAttackers()) {
game.fireEvent(GameEvent.getEvent(GameEvent.EventType.ATTACKER_DECLARED, group.defenderId, attacker, attackerId));
}
}
game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_ATTACKERS, attackerId, attackerId));
game.informPlayers(new StringBuilder(player.getName()).append(" attacks with ").append(groups.size()).append(groups.size() == 1 ? " creature":" creatures").toString());
}
protected void checkAttackRequirements(Player player, Game game) {
//20101001 - 508.1d
for (Permanent creature : player.getAvailableAttackers(game)) {
boolean mustAttack = false;
Set<UUID> defendersForcedToAttack = new HashSet<>();
for (Map.Entry<RequirementEffect, HashSet<Ability>> entry : game.getContinuousEffects().getApplicableRequirementEffects(creature, game).entrySet()) {
RequirementEffect effect = entry.getKey();
if (effect.mustAttack(game)) {
mustAttack = true;
for (Ability ability : entry.getValue()) {
UUID defenderId = effect.mustAttackDefender(ability, game);
if (defenderId != null) {
defendersForcedToAttack.add(defenderId);
}
break;
}
}
}
if (mustAttack) {
creaturesForcedToAttack.put(creature.getId(), defendersForcedToAttack);
if (defendersForcedToAttack.isEmpty()) {
if (defenders.size() == 1) {
player.declareAttacker(creature.getId(), defenders.iterator().next(), game, false);
} else {
TargetDefender target = new TargetDefender(defenders, creature.getId());
target.setRequired(true);
if (player.chooseTarget(Outcome.Damage, target, null, game)) {
player.declareAttacker(creature.getId(), target.getFirstTarget(), game, false);
}
}
} else {
player.declareAttacker(creature.getId(), defendersForcedToAttack.iterator().next(), game, false);
}
}
}
}
protected void checkAttackRestrictions(Player player, Game game) {
int count = 0;
for (CombatGroup group : groups) {
count += group.getAttackers().size();
}
if (count > 1) {
List<UUID> tobeRemoved = new ArrayList<>();
for (CombatGroup group : groups) {
for (UUID attackingCreatureId : group.getAttackers()) {
Permanent attacker = game.getPermanent(attackingCreatureId);
if (count > 1 && attacker != null && attacker.getAbilities().containsKey(CanAttackOnlyAloneAbility.getInstance().getId())) {
game.informPlayers(attacker.getLogName() + " can only attack alone. Removing it from combat.");
tobeRemoved.add(attackingCreatureId);
count--;
}
}
}
for (UUID attackingCreatureId : tobeRemoved) {
this.removeAttacker(attackingCreatureId, game);
}
}
if (count == 1) {
List<UUID> tobeRemoved = new ArrayList<>();
for (CombatGroup group : groups) {
for (UUID attackingCreatureId : group.getAttackers()) {
Permanent attacker = game.getPermanent(attackingCreatureId);
if (attacker != null && attacker.getAbilities().containsKey(CantAttackAloneAbility.getInstance().getId())) {
game.informPlayers(attacker.getLogName() + " can't attack alone. Removing it from combat.");
tobeRemoved.add(attackingCreatureId);
}
}
}
for (UUID attackingCreatureId : tobeRemoved) {
this.removeAttacker(attackingCreatureId, game);
}
}
}
public void selectBlockers(Game game) {
if (!game.replaceEvent(GameEvent.getEvent(GameEvent.EventType.DECLARING_BLOCKERS, attackerId, attackerId))) {
game.getCombat().selectBlockers(null, game);
}
}
/**
* Handle the blocker selection process
*
* @param blockController player that controlls how to block, if null the
* defender is the controller
* @param game
*/
public void selectBlockers(Player blockController, Game game) {
Player attacker = game.getPlayer(attackerId);
//20101001 - 509.1c
this.retrieveMustBlockAttackerRequirements(attacker, game);
for (UUID defenderId : getPlayerDefenders(game)) {
Player defender = game.getPlayer(defenderId);
if (defender != null) {
boolean choose = true;
if (blockController == null) {
blockController = defender;
}
while (choose) {
blockController.selectBlockers(game, defenderId);
if (game.isPaused() || game.gameOver(null)) {
return;
}
if (!this.checkBlockRestrictions(defender, game)) {
if (blockController.isHuman()) { // only human player can decide to do the block in another way
continue;
}
}
choose = !this.checkBlockRequirementsAfter(defender, blockController, game);
if (!choose) {
choose = !this.checkBlockRestrictionsAfter(defender, blockController, game);
}
}
game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_BLOCKERS, defenderId, defenderId));
// add info about attacker blocked by blocker to the game log
this.logBlockerInfo(defender, game);
}
}
// tool to catch the bug about flyers blocked by non flyers or intimidate blocked by creatures with other colors
TraceUtil.traceCombatIfNeeded(game, this);
}
/**
* Add info about attacker blocked by blocker to the game log
*
*/
private void logBlockerInfo(Player defender, Game game) {
boolean shownDefendingPlayer = game.getPlayers().size() < 3; // only two players no ned to sow the attacked player
for (CombatGroup group : this.getGroups()) {
if (group.defendingPlayerId.equals(defender.getId())) {
if (!shownDefendingPlayer) {
game.informPlayers(new StringBuilder("Attacked player: ").append(defender.getName()).toString());
shownDefendingPlayer = true;
}
StringBuilder sb = new StringBuilder();
boolean attackerExists = false;
for (UUID attackingCreatureId : group.getAttackers()) {
attackerExists = true;
Permanent attackingCreature = game.getPermanent(attackingCreatureId);
if (attackingCreature != null) {
sb.append("Attacker: ");
sb.append(attackingCreature.getLogName()).append(" (");
sb.append(attackingCreature.getPower().getValue()).append("/").append(attackingCreature.getToughness().getValue()).append(") ");
} else {
// creature left battlefield
attackingCreature = (Permanent) game.getLastKnownInformation(attackingCreatureId, Zone.BATTLEFIELD);
if (attackingCreature != null) {
sb.append(attackingCreature.getLogName()).append(" [left battlefield)] ");
}
}
}
if (attackerExists) {
if (group.getBlockers().size() > 0) {
sb.append("blocked by ");
for (UUID blockingCreatureId : group.getBlockerOrder()) {
Permanent blockingCreature = game.getPermanent(blockingCreatureId);
if (blockingCreature != null) {
sb.append(blockingCreature.getLogName()).append(" (");
sb.append(blockingCreature.getPower().getValue()).append("/").append(blockingCreature.getToughness().getValue()).append(") ");
}
}
} else {
sb.append("unblocked");
}
}
game.informPlayers(sb.toString());
}
}
}
/**
* Check the block restrictions
*
* @param player
* @param game
* @return false - if block restrictions were not complied
*/
public boolean checkBlockRestrictions(Player player, Game game) {
int count = 0;
boolean blockWasLegal = true;
for (CombatGroup group : groups) {
count += group.getBlockers().size();
}
for (CombatGroup group : groups) {
blockWasLegal &= group.checkBlockRestrictions(game, count);
}
return blockWasLegal;
}
public void acceptBlockers(Game game) {
for (CombatGroup group : groups) {
group.acceptBlockers(game);
}
}
public void resumeSelectBlockers(Game game) {
//TODO: this isn't quite right - but will work fine for two-player games
for (UUID defenderId : getPlayerDefenders(game)) {
game.fireEvent(GameEvent.getEvent(GameEvent.EventType.DECLARED_BLOCKERS, defenderId, defenderId));
}
}
/**
* Retrieves all requirements that apply and creates a Map with blockers and attackers
* // Map<creature that can block, Set< all attackers the creature can block and force it to block the attacker>>
*
* @param attackingPlayer - attacker
* @param game
*/
private void retrieveMustBlockAttackerRequirements(Player attackingPlayer, Game game) {
if (!game.getContinuousEffects().existRequirementEffects()) {
return;
}
for (Permanent possibleBlocker : game.getBattlefield().getActivePermanents(filterBlockers, attackingPlayer.getId(), game)) {
for (Map.Entry<RequirementEffect, HashSet<Ability>> requirementEntry : game.getContinuousEffects().getApplicableRequirementEffects(possibleBlocker, game).entrySet()) {
if (requirementEntry.getKey().mustBlock(game)) {
for (Ability ability : requirementEntry.getValue()) {
UUID attackingCreatureId = requirementEntry.getKey().mustBlockAttacker(ability, game);
Player defender = game.getPlayer(possibleBlocker.getControllerId());
if (attackingCreatureId != null && defender != null) {
if (creatureMustBlockAttackers.containsKey(possibleBlocker.getId())) {
creatureMustBlockAttackers.get(possibleBlocker.getId()).add(attackingCreatureId);
} else {
Set<UUID> forcingAttackers = new HashSet<>();
forcingAttackers.add(attackingCreatureId);
creatureMustBlockAttackers.put(possibleBlocker.getId(), forcingAttackers);
// assign block to the first forcing attacker automatically
defender.declareBlocker(defender.getId(), possibleBlocker.getId(), attackingCreatureId, game);
}
}
}
}
}
}
}
/**
* 509.1c The defending player checks each creature he or she controls to
* see whether it's affected by any requirements (effects that say a
* creature must block, or that it must block if some condition is met). If
* the number of requirements that are being obeyed is fewer than the
* maximum possible number of requirements that could be obeyed without
* disobeying any restrictions, the declaration of blockers is illegal. If a
* creature can't block unless a player pays a cost, that player is not
* required to pay that cost, even if blocking with that creature would
* increase the number of requirements being obeyed.
*
*
* Example: A player controls one creature that "blocks if able" and another
* creature with no abilities. An effect states "Creatures can't be blocked
* except by two or more creatures." Having only the first creature block
* violates the restriction. Having neither creature block fulfills the
* restriction but not the requirement. Having both creatures block the same
* attacking creature fulfills both the restriction and the requirement, so
* that's the only option.
*
* @param player
* @param controller
* @param game
* @return
*/
public boolean checkBlockRequirementsAfter(Player player, Player controller, Game game) {
// Get once a list of all opponents in range
Set<UUID> opponents = game.getOpponents(attackerId);
//20101001 - 509.1c
// map with attackers (UUID) that must be blocked by at least one blocker and a set of all creatures that can block it and don't block yet
Map<UUID, Set<UUID>> mustBeBlockedByAtLeastOne = new HashMap<>();
// check mustBlock requirements of creatures from opponents of attacking player
for (Permanent creature : game.getBattlefield().getActivePermanents(new FilterControlledCreaturePermanent(), player.getId(), game)) {
// creature is controlled by an opponent of the attacker
if (opponents.contains(creature.getControllerId())) {
// Creature is already blocking but not forced to do so
if (creature.getBlocking() > 0) {
// get all requirement effects that apply to the creature (e.g. is able to block attacker)
for (Map.Entry<RequirementEffect, HashSet<Ability>> entry : game.getContinuousEffects().getApplicableRequirementEffects(creature, game).entrySet()) {
RequirementEffect effect = entry.getKey();
// get possible mustBeBlockedByAtLeastOne blocker
for (Ability ability : entry.getValue()) {
UUID toBeBlockedCreature = effect.mustBlockAttackerIfElseUnblocked(ability, game);
if (toBeBlockedCreature != null) {
Set<UUID> potentialBlockers;
if (mustBeBlockedByAtLeastOne.containsKey(toBeBlockedCreature)) {
potentialBlockers = mustBeBlockedByAtLeastOne.get(toBeBlockedCreature);
} else {
potentialBlockers = new HashSet<>();
mustBeBlockedByAtLeastOne.put(toBeBlockedCreature, potentialBlockers);
}
potentialBlockers.add(creature.getId());
}
}
}
}
// Creature is not blocking yet
if (creature.getBlocking() == 0) {
// get all requirement effects that apply to the creature
for (Map.Entry<RequirementEffect, HashSet<Ability>> entry : game.getContinuousEffects().getApplicableRequirementEffects(creature, game).entrySet()) {
RequirementEffect effect = entry.getKey();
// get possible mustBeBlockedByAtLeastOne blocker
for (Ability ability : entry.getValue()) {
UUID toBeBlockedCreature = effect.mustBlockAttackerIfElseUnblocked(ability, game);
if (toBeBlockedCreature != null) {
Set<UUID> potentialBlockers;
if (mustBeBlockedByAtLeastOne.containsKey(toBeBlockedCreature)) {
potentialBlockers = mustBeBlockedByAtLeastOne.get(toBeBlockedCreature);
} else {
potentialBlockers = new HashSet<>();
mustBeBlockedByAtLeastOne.put(toBeBlockedCreature, potentialBlockers);
}
potentialBlockers.add(creature.getId());
}
}
// check the mustBlockAny requirement ----------------------------------------
if (effect.mustBlockAny(game)) {
// check that it can block at least one of the attackers
// and no restictions prevent this
boolean mayBlock = false;
for (UUID attackingCreatureId : getAttackers()) {
if (creature.canBlock(attackingCreatureId, game)) {
// check restrictions of the creature to block that prevent it can be blocked
Permanent attackingCreature = game.getPermanent(attackingCreatureId);
if (attackingCreature != null && attackingCreature.getMinBlockedBy() > 1) {
// TODO: check if enough possible blockers are available, if true, mayBlock can be set to true
} else {
mayBlock = true;
break;
}
}
}
// if so inform human player or set block for AI player
if (mayBlock) {
if (controller.isHuman()) {
game.informPlayer(controller, "Creature should block this turn: " + creature.getLogName());
} else {
Player defender = game.getPlayer(creature.getControllerId());
if (defender != null) {
for (UUID attackingCreatureId : getAttackers()) {
if (creature.canBlock(attackingCreatureId, game)) {
defender.declareBlocker(defender.getId(), creature.getId(), attackingCreatureId, game);
break;
}
}
}
}
return false;
}
}
}
}
}
}
// check attacking creature mustBeBlockedByAtLeastOne
for (UUID toBeBlockedCreatureId : mustBeBlockedByAtLeastOne.keySet()) {
for (CombatGroup combatGroup : game.getCombat().getGroups()) {
if (combatGroup.getBlockers().isEmpty() && combatGroup.getAttackers().contains(toBeBlockedCreatureId)) {
// creature is not blocked but has possible blockers
if (controller.isHuman()) {
Permanent toBeBlockedCreature = game.getPermanent(toBeBlockedCreatureId);
if (toBeBlockedCreature != null) {
// check if all possible blocker block other creatures they are forced to block
// read through all possible blockers
boolean possibleBlockerAvailable = false;
for (UUID possibleBlockerId : mustBeBlockedByAtLeastOne.get(toBeBlockedCreatureId)) {
Set<UUID> forcingAttackers = creatureMustBlockAttackers.get(possibleBlockerId);
if (forcingAttackers == null) {
// no other creature forces the blocker to block -> it's available
possibleBlockerAvailable = true;
break;
}
// get the attackers he blocks
List<UUID> blockedAttackers = null;
for (CombatGroup combatGroupToCheck : game.getCombat().getGroups()) {
if (combatGroupToCheck.getBlockers().contains(possibleBlockerId)) {
blockedAttackers = combatGroupToCheck.getAttackers();
break;
}
}
if (blockedAttackers == null) {
// he blocks no other creature -> it's available
possibleBlockerAvailable = true;
break;
}
// get attackers forcing the possible blocker to block
possibleBlockerAvailable = true;
for (UUID blockedAttackerId : blockedAttackers) {
if (creatureMustBlockAttackers.get(possibleBlockerId).contains(blockedAttackerId)) {
possibleBlockerAvailable = false;
break;
}
}
if (possibleBlockerAvailable) {
break;
}
}
if (possibleBlockerAvailable) {
game.informPlayer(controller, new StringBuilder(toBeBlockedCreature.getLogName()).append(" has to be blocked by at least one creature.").toString());
return false;
}
}
} else {
// take the first potential blocker from the set to block for the AI
UUID blockingCreatureId = mustBeBlockedByAtLeastOne.get(toBeBlockedCreatureId).iterator().next();
Permanent blockingCreature = game.getPermanent(blockingCreatureId);
if (blockingCreature != null) {
Player defender = game.getPlayer(blockingCreature.getControllerId());
if (defender != null) {
defender.declareBlocker(defender.getId(), blockingCreatureId, toBeBlockedCreatureId, game);
}
}
}
}
}
}
// check if creatures are forced to block but do not block at all or block creatures they are not forced to block
StringBuilder sb = new StringBuilder();
for (Map.Entry<UUID, Set<UUID>> entry : creatureMustBlockAttackers.entrySet()) {
boolean blockIsValid;
Permanent creatureForcedToBlock = game.getPermanent(entry.getKey());
if (creatureForcedToBlock == null) {
break;
}
// creature does not block -> not allowed
if (creatureForcedToBlock.getBlocking() == 0) {
blockIsValid = false;
} else {
blockIsValid = false;
// which attacker is he blocking
CombatGroups:
for (CombatGroup combatGroup : game.getCombat().getGroups()) {
if (combatGroup.getBlockers().contains(creatureForcedToBlock.getId())) {
for (UUID forcingAttackerId : combatGroup.getAttackers()) {
if (entry.getValue().contains(forcingAttackerId)) {
// the creature is blocking a forcing attacker, so the block is ok
blockIsValid = true;
break CombatGroups;
} else {
// check if the blocker blocks a attacker that must be blocked at least by one and is the only blocker, this block is also valid
if (combatGroup.getBlockers().size() == 1) {
if (mustBeBlockedByAtLeastOne.containsKey(forcingAttackerId)) {
if (mustBeBlockedByAtLeastOne.get(forcingAttackerId).contains(creatureForcedToBlock.getId())) {
blockIsValid = true;
break CombatGroups;
}
}
}
}
}
}
}
}
if (!blockIsValid) {
sb.append(" ").append(creatureForcedToBlock.getLogName());
}
}
if (sb.length() > 0) {
sb.insert(0, "Some creatures are forced to block certain attacker(s):\n");
sb.append("\nPlease block with each of these creatures an appropriate attacker.");
game.informPlayer(controller, sb.toString());
return false;
}
return true;
}
/**
* Checks the canBeBlockedCheckAfter RestrictionEffect Is the block still
* valid after all block decisions are done
*
* @param player
* @param controller
* @param game
* @return
*/
public boolean checkBlockRestrictionsAfter(Player player, Player controller, Game game) {
for (UUID attackingCreatureId : this.getAttackers()) {
Permanent attackingCreature = game.getPermanent(attackingCreatureId);
if (attackingCreature != null) {
for (Map.Entry<RestrictionEffect, HashSet<Ability>> entry : game.getContinuousEffects().getApplicableRestrictionEffects(attackingCreature, game).entrySet()) {
RestrictionEffect effect = entry.getKey();
for (Ability ability : entry.getValue()) {
if (!effect.canBeBlockedCheckAfter(attackingCreature, ability, game)) {
if (controller.isHuman()) {
game.informPlayer(controller, new StringBuilder(attackingCreature.getLogName()).append(" can't be blocked this way.").toString());
return false;
} else {
// remove blocking creatures for AI
for (CombatGroup combatGroup : this.getGroups()) {
if (combatGroup.getAttackers().contains(attackingCreatureId)) {
for (UUID blockerId : combatGroup.getBlockers()) {
removeBlocker(blockerId, game);
}
}
}
}
}
}
}
}
}
return true;
}
public void setDefenders(Game game) {
Set<UUID> opponents = game.getOpponents(attackerId);
PlayerList players;
switch (game.getAttackOption()) {
case LEFT:
players = game.getState().getPlayerList(attackerId);
while (true) {
Player opponent = players.getNext(game);
if (opponents.contains(opponent.getId())) {
addDefender(opponent.getId(), game);
break;
}
}
break;
case RIGHT:
players = game.getState().getPlayerList(attackerId);
while (true) {
Player opponent = players.getPrevious(game);
if (opponents.contains(opponent.getId())) {
addDefender(opponent.getId(), game);
break;
}
}
break;
case MULTIPLE:
for (UUID opponentId : game.getOpponents(attackerId)) {
addDefender(opponentId, game);
}
break;
}
}
private void addDefender(UUID defenderId, Game game) {
if (!defenders.contains(defenderId)) {
if (maxAttackers < Integer.MAX_VALUE) {
Player defendingPlayer = game.getPlayer(defenderId);
if (defendingPlayer != null) {
if (defendingPlayer.getMaxAttackedBy() == Integer.MAX_VALUE) {
maxAttackers = Integer.MAX_VALUE;
} else {
if (maxAttackers == Integer.MIN_VALUE) {
maxAttackers = defendingPlayer.getMaxAttackedBy();
} else {
maxAttackers += defendingPlayer.getMaxAttackedBy();
}
}
}
}
defenders.add(defenderId);
for (Permanent permanent : game.getBattlefield().getAllActivePermanents(filterPlaneswalker, defenderId, game)) {
defenders.add(permanent.getId());
}
}
}
public boolean declareAttacker(UUID attackerId, UUID defenderId, Game game) {
if (!defenders.contains(defenderId)) {
return false;
}
Permanent defender = game.getPermanent(defenderId);
// Check if defending player can be attacked with another creature
if (!canDefenderBeAttacked(attackerId, defenderId, game)) {
return false;
}
CombatGroup newGroup = new CombatGroup(defenderId, defender != null, defender != null ? defender.getControllerId() : defenderId);
newGroup.attackers.add(attackerId);
Permanent attacker = game.getPermanent(attackerId);
if (!attacker.getAbilities().containsKey(VigilanceAbility.getInstance().getId())) {
attacker.tap(game);
}
attacker.setAttacking(true);
groups.add(newGroup);
return true;
}
public boolean canDefenderBeAttacked(UUID attackerId, UUID defenderId, Game game) {
Permanent defender = game.getPermanent(defenderId);
// Check if defending player can be attacked with another creature
if (defender != null) {
// a planeswalker is attacked, there exits no restriction yet for attacking planeswalker
return true;
}
Player defendingPlayer = game.getPlayer(defenderId);
if (defendingPlayer == null) {
return false;
}
Set<UUID> defenderAttackedBy;
if (numberCreaturesDefenderAttackedBy.containsKey(defendingPlayer.getId())) {
defenderAttackedBy = numberCreaturesDefenderAttackedBy.get(defendingPlayer.getId());
} else {
defenderAttackedBy = new HashSet<>();
numberCreaturesDefenderAttackedBy.put(defendingPlayer.getId(), defenderAttackedBy);
}
if (defenderAttackedBy.size() >= defendingPlayer.getMaxAttackedBy()) {
Player attackingPlayer = game.getPlayer(game.getControllerId(attackerId));
if (attackingPlayer != null) {
game.informPlayer(attackingPlayer, new StringBuilder("No more than ")
.append(CardUtil.numberToText(defendingPlayer.getMaxAttackedBy()))
.append(" creatures can attack ")
.append(defendingPlayer.getName()).toString());
}
return false;
}
defenderAttackedBy.add(attackerId);
return true;
}
// add blocking group for creatures that block more than one creature
public void addBlockingGroup(UUID blockerId, UUID attackerId, UUID playerId, Game game) {
Permanent blocker = game.getPermanent(blockerId);
if (blockerId != null && blocker != null && blocker.getBlocking() > 1) {
if (!blockingGroups.containsKey(blockerId)) {
CombatGroup newGroup = new CombatGroup(playerId, false, playerId);
newGroup.blockers.add(blockerId);
// add all blocked attackers
for (CombatGroup group : groups) {
if (group.getBlockers().contains(blockerId)) {
// take into account banding
for (UUID attacker : group.attackers) {
newGroup.attackers.add(attacker);
}
}
}
blockingGroups.put(blockerId, newGroup);
} else {
//TODO: handle banding
blockingGroups.get(blockerId).attackers.add(attackerId);
}
}
}
public boolean removeFromCombat(UUID creatureId, Game game) {
boolean result = false;
Permanent creature = game.getPermanent(creatureId);
if (creature != null) {
creature.setAttacking(false);
creature.setBlocking(0);
for (CombatGroup group : groups) {
result |= group.remove(creatureId);
}
}
return result;
}
public void endCombat(Game game) {
Permanent creature;
for (CombatGroup group : groups) {
for (UUID attacker : group.attackers) {
creature = game.getPermanent(attacker);
if (creature != null) {
creature.setAttacking(false);
creature.setBlocking(0);
}
}
for (UUID blocker : group.blockers) {
creature = game.getPermanent(blocker);
if (creature != null) {
creature.setAttacking(false);
creature.setBlocking(0);
}
}
}
clear();
}
public boolean hasFirstOrDoubleStrike(Game game) {
for (CombatGroup group : groups) {
if (group.hasFirstOrDoubleStrike(game)) {
return true;
}
}
return false;
}
public CombatGroup findGroup(UUID attackerId) {
for (CombatGroup group : groups) {
if (group.getAttackers().contains(attackerId)) {
return group;
}
}
return null;
}
public int totalUnblockedDamage(Game game) {
int total = 0;
for (CombatGroup group : groups) {
if (group.getBlockers().isEmpty()) {
total += group.totalAttackerDamage(game);
}
}
return total;
}
public boolean attacksAlone() {
return (groups.size() == 1 && groups.get(0).getAttackers().size() == 1);
}
public boolean noAttackers() {
return groups.isEmpty() || getAttackers().isEmpty();
}
public boolean isAttacked(UUID defenderId, Game game) {
for (CombatGroup group : groups) {
if (group.getDefenderId().equals(defenderId)) {
return true;
}
if (group.defenderIsPlaneswalker) {
Permanent permanent = game.getPermanent(group.getDefenderId());
if (permanent.getControllerId().equals(defenderId)) {
return true;
}
}
}
return false;
}
/**
*
* @param attackerId
* @return uuid of defending player or planeswalker
*/
public UUID getDefenderId(UUID attackerId) {
UUID defenderId = null;
for (CombatGroup group : groups) {
if (group.getAttackers().contains(attackerId)) {
defenderId = group.getDefenderId();
break;
}
}
return defenderId;
}
public UUID getDefendingPlayerId(UUID attackerId, Game game) {
UUID defenderId = null;
for (CombatGroup group : groups) {
if (group.getAttackers().contains(attackerId)) {
defenderId = group.getDefenderId();
if (group.defenderIsPlaneswalker) {
Permanent permanent = game.getPermanent(defenderId);
if (permanent != null) {
defenderId = permanent.getControllerId();
} else {
defenderId = null;
}
}
break;
}
}
return defenderId;
}
public Set<UUID> getPlayerDefenders(Game game) {
Set<UUID> playerDefenders = new HashSet<>();
for (CombatGroup group : groups) {
if (group.defenderIsPlaneswalker) {
Permanent permanent = game.getPermanent(group.getDefenderId());
if (permanent != null) {
playerDefenders.add(permanent.getControllerId());
}
} else {
playerDefenders.add(group.getDefenderId());
}
}
return playerDefenders;
}
public void damageAssignmentOrder(Game game) {
for (CombatGroup group : groups) {
group.pickBlockerOrder(attackerId, game);
}
for (Map.Entry<UUID, CombatGroup> blockingGroup : blockingGroups.entrySet()) {
Permanent blocker = game.getPermanent(blockingGroup.getKey());
if (blocker != null) {
blockingGroup.getValue().pickAttackerOrder(blocker.getControllerId(), game);
}
}
}
public void removeAttacker(UUID attackerId, Game game) {
for (CombatGroup group : groups) {
if (group.attackers.contains(attackerId)) {
group.attackers.remove(attackerId);
group.attackerOrder.remove(attackerId);
for (Set<UUID> attackingCreatures : numberCreaturesDefenderAttackedBy.values()) {
attackingCreatures.remove(attackerId);
}
Permanent creature = game.getPermanent(attackerId);
if (creature != null) {
creature.setAttacking(false);
creature.setTapped(false);
}
if (group.attackers.isEmpty()) {
groups.remove(group);
}
return;
}
}
}
public void removeBlockerGromGroup(UUID blockerId, CombatGroup groupToUnblock, Game game) {
Permanent creature = game.getPermanent(blockerId);
if (creature != null) {
for (CombatGroup group : groups) {
if (group.equals(groupToUnblock) && group.blockers.contains(blockerId)) {
group.blockers.remove(blockerId);
group.blockerOrder.remove(blockerId);
if (group.blockers.isEmpty()) {
group.blocked = false;
}
if (creature.getBlocking() > 0) {
creature.setBlocking(creature.getBlocking() - 1);
} else {
throw new UnsupportedOperationException("Tryinging creature to unblock, but blocking number value of creature < 1");
}
}
}
}
}
public void removeBlocker(UUID blockerId, Game game) {
for (CombatGroup group : groups) {
if (group.blockers.contains(blockerId)) {
group.blockers.remove(blockerId);
group.blockerOrder.remove(blockerId);
if (group.blockers.isEmpty()) {
group.blocked = false;
}
}
}
Permanent creature = game.getPermanent(blockerId);
if (creature != null) {
creature.setBlocking(0);
}
}
public UUID getAttackerId() {
return attackerId;
}
public Map<UUID, Set<UUID>> getCreaturesForcedToAttack() {
return creaturesForcedToAttack;
}
public int getMaxAttackers() {
return maxAttackers;
}
@Override
public Combat copy() {
return new Combat(this);
}
}