Implement Aeon Engine (#8804)

Co-authored-by: teskogi <tojile7269@yeafam.com>

Mage.Sets/src/mage/cards/a/AeonEngine.java

@@ -0,0 +1,65 @@
+
+package mage.cards.a;
+
+import java.util.UUID;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTappedAbility;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.common.ExileSourceCost;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.effects.OneShotEffect;
+import mage.cards.*;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.GameState;
+import mage.players.PlayerList;
+
+/**
+ * 
+ * @author azra1l <algee2005@gmail.com>
+ */
+public final class AeonEngine extends CardImpl {
+    public AeonEngine(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId,setInfo,new CardType[]{CardType.ARTIFACT},"{5}");
+        
+        // Aeon Engine enters the battlefield tapped.
+        this.addAbility(new EntersBattlefieldTappedAbility());
+
+        // {T}, Exile Aeon Engine: Reverse the game’s turn order. (For example, if play had proceeded clockwise around the table, it now goes counterclockwise.)
+	Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new AeonEngineEffect(), new TapSourceCost());
+        ability.addCost(new ExileSourceCost());
+	this.addAbility(ability);
+    }
+
+    public AeonEngine(final AeonEngine card) {
+        super(card);
+    }
+
+    @Override
+    public AeonEngine copy() {
+        return new AeonEngine(this);
+    }
+}
+
+class AeonEngineEffect extends OneShotEffect {
+    public AeonEngineEffect() {
+        super(Outcome.Benefit);
+        this.staticText = "Reverse the game turn order.";
+    }
+
+    public AeonEngineEffect(final AeonEngineEffect effect) {
+        super(effect);
+    }
+
+    public AeonEngineEffect copy() {
+        return new AeonEngineEffect(this);
+    }
+
+    public boolean apply(Game game, Ability source) {
+        game.getState().setReverseTurnOrder(true);
+        return true;
+        
+    }
+}

Mage.Sets/src/mage/sets/Commander2019Edition.java

@@ -20,6 +20,7 @@ public final class Commander2019Edition extends ExpansionSet {
         this.blockName = "Command Zone";
 
         cards.add(new SetCardInfo("Ainok Survivalist", 156, Rarity.COMMON, mage.cards.a.AinokSurvivalist.class));
+        cards.add(new SetCardInfo("Aeon Engine", 52, Rarity.RARE, mage.cards.a.AeonEngine.class));
         cards.add(new SetCardInfo("Akoum Refuge", 226, Rarity.UNCOMMON, mage.cards.a.AkoumRefuge.class));
         cards.add(new SetCardInfo("Alchemist's Greeting", 133, Rarity.COMMON, mage.cards.a.AlchemistsGreeting.class));
         cards.add(new SetCardInfo("Angel of Sanctions", 61, Rarity.MYTHIC, mage.cards.a.AngelOfSanctions.class));

Mage.Tests/src/test/java/org/mage/test/cards/single/c19/AeonEngineTest.java

@@ -0,0 +1,145 @@
+package org.mage.test.cards.single.c19;
+
+import java.io.FileNotFoundException;
+import mage.constants.MultiplayerAttackOption;
+import mage.constants.PhaseStep;
+import mage.constants.RangeOfInfluence;
+import mage.constants.Zone;
+import mage.game.FreeForAll;
+import mage.game.Game;
+import mage.game.GameException;
+import mage.game.mulligan.MulliganType;
+import mage.players.Player;
+import org.junit.Test;
+import org.mage.test.player.TestPlayer;
+import org.mage.test.serverside.base.CardTestMultiPlayerBase;
+
+/**
+ *
+ * @author azra1l <algee2005@gmail.com>
+ */
+public class AeonEngineTest extends CardTestMultiPlayerBase {
+    @Override
+    protected Game createNewGameAndPlayers() throws GameException {
+        Game game = new FreeForAll(MultiplayerAttackOption.LEFT, RangeOfInfluence.ALL, MulliganType.GAME_DEFAULT.getMulligan(0), 20);
+        // Player order: A -> D -> C -> B
+        playerA = createPlayer(game, playerA, "PlayerA");
+        playerB = createPlayer(game, playerB, "PlayerB");
+        playerC = createPlayer(game, playerC, "PlayerC");
+        playerD = createPlayer(game, playerD, "PlayerD");
+        return game;
+    }
+    
+    @Test
+    public void testEnterTappedNormalTurnOrder() {
+        // Aeon Engine - Artefact - {5}
+        // Aeon Engine enters the battlefield tapped.
+        // {T}, Exile Aeon Engine: Reverse the game’s turn order. (For example, if play had proceeded clockwise around the table, it now goes counterclockwise.)
+        addCard(Zone.HAND, playerA, "Aeon Engine", 1);
+        addCard(Zone.BATTLEFIELD, playerA, "Swamp", 5);
+        addCard(Zone.HAND, playerD, "Agonizing Syphon", 1);
+        addCard(Zone.BATTLEFIELD, playerD, "Swamp", 4);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Aeon Engine");
+        castSpell(2, PhaseStep.PRECOMBAT_MAIN, playerD, "Agonizing Syphon", playerA);
+
+        setStrictChooseMode(true);
+        setStopAt(2, PhaseStep.END_TURN);
+        execute();
+        assertAllCommandsUsed();
+        
+        //check if aeon engine is tapped
+        assertTapped("Aeon Engine", true);
+    
+        //check if turn was passed to correct player - should be D
+        assertActivePlayer(playerD);
+        assertLife(playerA, 17);
+        assertLife(playerD, 23);
+    }
+
+    @Test
+    public void testExileCostReversedTurnOrder() throws GameException, FileNotFoundException {
+        // Aeon Engine - Artefact - {5}
+        // Aeon Engine enters the battlefield tapped.
+        // {T}, Exile Aeon Engine: Reverse the game’s turn order. (For example, if play had proceeded clockwise around the table, it now goes counterclockwise.)
+        addCard(Zone.HAND, playerB, "Agonizing Syphon", 3);
+        addCard(Zone.HAND, playerA, "Aeon Engine", 1);
+        addCard(Zone.BATTLEFIELD, playerA, "Swamp", 5);
+        addCard(Zone.HAND, playerB, "Agonizing Syphon", 3);
+        addCard(Zone.BATTLEFIELD, playerB, "Swamp", 5);
+        addCard(Zone.HAND, playerC, "Agonizing Syphon", 3);
+        addCard(Zone.BATTLEFIELD, playerC, "Swamp", 5);
+        addCard(Zone.HAND, playerD, "Agonizing Syphon", 3);
+        addCard(Zone.BATTLEFIELD, playerD, "Swamp", 5);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Aeon Engine");
+        castSpell(2, PhaseStep.PRECOMBAT_MAIN, playerD, "Agonizing Syphon", playerA);
+        castSpell(3, PhaseStep.PRECOMBAT_MAIN, playerC, "Agonizing Syphon", playerA);
+        castSpell(4, PhaseStep.PRECOMBAT_MAIN, playerB, "Agonizing Syphon", playerA);
+        activateAbility(5, PhaseStep.PRECOMBAT_MAIN, playerA, "{T}, Exile {this}:");
+        castSpell(6, PhaseStep.PRECOMBAT_MAIN, playerB, "Agonizing Syphon", playerA);
+
+        setStrictChooseMode(true);
+        setStopAt(6, PhaseStep.END_TURN);
+        execute();
+        assertAllCommandsUsed();
+        
+        //check if aeon engine has been exiled
+        assertExileCount(playerA, "Aeon Engine", 1);
+                
+        //check if turn was passed to correct player each turn - should be B
+        assertActivePlayer(playerB);
+        assertLife(playerA, 8);
+        assertLife(playerB, 26);
+        assertLife(playerC, 23);
+        assertLife(playerD, 23);
+        assertGraveyardCount(playerB, "Agonizing Syphon", 2);
+        assertGraveyardCount(playerC, "Agonizing Syphon", 1);
+        assertGraveyardCount(playerD, "Agonizing Syphon", 1);
+    }
+    
+    @Test
+    public void testExileCostReversedTurnOrderDouble() throws GameException, FileNotFoundException {
+        // Aeon Engine - Artefact - {5}
+        // Aeon Engine enters the battlefield tapped.
+        // {T}, Exile Aeon Engine: Reverse the game’s turn order. (For example, if play had proceeded clockwise around the table, it now goes counterclockwise.)
+        addCard(Zone.HAND, playerA, "Agonizing Syphon", 3);
+        addCard(Zone.HAND, playerA, "Aeon Engine", 1);
+        addCard(Zone.BATTLEFIELD, playerA, "Swamp", 5);
+        addCard(Zone.HAND, playerB, "Agonizing Syphon", 3);
+        addCard(Zone.BATTLEFIELD, playerB, "Swamp", 5);
+        addCard(Zone.HAND, playerC, "Agonizing Syphon", 3);
+        addCard(Zone.BATTLEFIELD, playerC, "Swamp", 5);
+        addCard(Zone.HAND, playerD, "Agonizing Syphon", 3);
+        addCard(Zone.HAND, playerD, "Aeon Engine", 1);
+        addCard(Zone.BATTLEFIELD, playerD, "Swamp", 5);
+
+        castSpell(1, PhaseStep.PRECOMBAT_MAIN, playerA, "Aeon Engine");
+        castSpell(2, PhaseStep.PRECOMBAT_MAIN, playerD, "Aeon Engine");
+        castSpell(3, PhaseStep.PRECOMBAT_MAIN, playerC, "Agonizing Syphon", playerA);
+        castSpell(4, PhaseStep.PRECOMBAT_MAIN, playerB, "Agonizing Syphon", playerA);
+        activateAbility(5, PhaseStep.PRECOMBAT_MAIN, playerA, "{T}, Exile {this}:");
+        castSpell(6, PhaseStep.PRECOMBAT_MAIN, playerB, "Agonizing Syphon", playerA);
+        castSpell(7, PhaseStep.PRECOMBAT_MAIN, playerC, "Agonizing Syphon", playerA);
+        activateAbility(8, PhaseStep.PRECOMBAT_MAIN, playerD, "{T}, Exile {this}:");
+        castSpell(9, PhaseStep.PRECOMBAT_MAIN, playerC, "Agonizing Syphon", playerA);
+        
+        setStrictChooseMode(true);
+        setStopAt(9, PhaseStep.END_TURN);
+        execute();
+        assertAllCommandsUsed();
+        
+        //check if aeon engine's have been exiled
+        assertExileCount(playerA, "Aeon Engine", 1);
+        assertExileCount(playerD, "Aeon Engine", 1);
+                
+        //check if turn was passed to correct player each turn - should be C
+        assertActivePlayer(playerC);
+        assertLife(playerA, 5);
+        assertLife(playerB, 26);
+        assertLife(playerC, 29);
+        assertLife(playerD, 20);
+        assertGraveyardCount(playerB, "Agonizing Syphon", 2);
+        assertGraveyardCount(playerC, "Agonizing Syphon", 3);
+    }
+}

Mage/src/main/java/mage/game/Game.java

@@ -647,4 +647,6 @@ public interface Game extends MageItem, Serializable, Copyable<Game> {
     void setGameStopped(boolean gameStopped);
 
     boolean isGameStopped();
+    
+    boolean isTurnOrderReversed();
 }

Mage/src/main/java/mage/game/GameImpl.java

@@ -3770,6 +3770,11 @@ public abstract class GameImpl implements Game {
         return gameStopped;
     }
     
+    @Override
+    public boolean isTurnOrderReversed() {
+        return state.getReverseTurnOrder();
+    }
+
     @Override
     public String toString() {
         Player activePayer = this.getPlayer(this.getActivePlayerId());

Mage/src/main/java/mage/game/GameState.java

@@ -108,6 +108,7 @@ public class GameState implements Serializable, Copyable<GameState> {
     private boolean manaBurn = false;
     private boolean hasDayNight = false;
     private boolean isDaytime = true;
+    private boolean reverseTurnOrder = false;
 
     private int applyEffectsCounter; // Upcounting number of each applyEffects execution
 
@@ -1449,4 +1450,16 @@ public class GameState implements Serializable, Copyable<GameState> {
     public String toString() {
         return CardUtil.getTurnInfo(this);
     }
+
+    public boolean setReverseTurnOrder(boolean reverse){
+        if(this.reverseTurnOrder&&reverse){
+            this.reverseTurnOrder = false;
+        } else {
+            this.reverseTurnOrder = reverse;
+        }
+        return this.reverseTurnOrder;
+    }
+    public boolean getReverseTurnOrder(){
+        return this.reverseTurnOrder;
+    }
 }

Mage/src/main/java/mage/players/PlayerList.java

@@ -47,7 +47,11 @@ public class PlayerList extends CircularList<UUID> {
         }
         Player player;
         while (true) {
-            player = game.getPlayer(super.getNext());
+            if(game.isTurnOrderReversed()){
+                player = game.getPlayer(super.getPrevious());
+            } else{
+                player = game.getPlayer(super.getNext());
+            }
             if (player.isInGame()) {
                 break;
             }