fix atk 0 monster attack

Game/AI/Decks/BlueEyesExecutor.cs

@@ -231,11 +231,6 @@ namespace WindBot.Game.AI.Decks
             return null;
         }
 
-        public override bool OnPreBattleBetween(ClientCard attacker, ClientCard defender)
-        {
-            return attacker.Attack > 0 && base.OnPreBattleBetween(attacker, defender);
-        }
-
         private bool DragonShrineEffect()
         {
             AI.SelectCard(new[]

Game/AI/Decks/MokeyMokeyExecutor.cs

@@ -33,10 +33,5 @@ namespace WindBot.Game.AI.Decks
             else
                 return base.OnRockPaperScissors();
         }
-
-        public override bool OnPreBattleBetween(ClientCard attacker, ClientCard defender)
-        {
-            return attacker.Attack > 0 && base.OnPreBattleBetween(attacker, defender);
-        }
     }
 }
\ No newline at end of file

Game/AI/DefaultExecutor.cs

@@ -50,6 +50,8 @@ namespace WindBot.Game.AI
         /// <returns>true if the attack can be done.</returns>
         public override bool OnPreBattleBetween(ClientCard attacker, ClientCard defender)
         {
+            if (attacker.RealPower <= 0)
+                return false;
 
             if (!attacker.IsMonsterHasPreventActivationEffectInBattle())
             {

Game/AI/Executor.cs

@@ -62,8 +62,16 @@ namespace WindBot.Game.AI
                 return AI.ToMainPhase2();
 
             if (defenders.Count == 0)
-                return AI.Attack(attackers[0], null);
-
+            {
+                for (int i = attackers.Count - 1; i >= 0; --i)
+                {
+                    ClientCard attacker = attackers[i];
+                    if (attacker.Attack > 0)
+                        return AI.Attack(attacker, null);
+                }
+            }
+            else
+            {
                 for (int i = defenders.Count - 1; i >= 0; --i)
                 {
                     ClientCard defender = defenders[i];
@@ -85,9 +93,10 @@ namespace WindBot.Game.AI
                     if (attacker.CanDirectAttack)
                         return AI.Attack(attacker, null);
                 }
+            }
 
             if (!Battle.CanMainPhaseTwo)
-                return AI.Attack(attackers[attackers.Count - 1], defenders[0]);
+                return AI.Attack(attackers[0], (defenders.Count == 0) ? null : defenders[0]);
 
             return AI.ToMainPhase2();
         }