fix(Scripts/Karazhan): Fix Aran combat movement behavior (#17359)

* fix(Scripts/Karazhan): Fix Aran combat movement behavior

* Update SmartScript.cpp

src/server/game/Entities/Creature/Creature.cpp

@@ -3707,6 +3707,24 @@ uint32 Creature::GetPlayerDamageReq() const
     return _playerDamageReq;
 }
 
+bool Creature::CanCastSpell(uint32 spellID) const
+{
+    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(spellID);
+    int32 currentPower = GetPower(getPowerType());
+
+    if (HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_SILENCED) || IsSpellProhibited(spellInfo->GetSchoolMask()))
+    {
+        return false;
+    }
+
+    if (spellInfo && (currentPower < spellInfo->CalcPowerCost(this, spellInfo->GetSchoolMask())))
+    {
+        return false;
+    }
+
+    return true;
+}
+
 std::string Creature::GetDebugInfo() const
 {
     std::stringstream sstr;

src/server/game/Entities/Creature/Creature.h

@@ -399,6 +399,12 @@ public:
      * */
     void ResumeChasingVictim() { GetMotionMaster()->MoveChase(GetVictim()); };
 
+    /**
+     * @brief Returns true if the creature is able to cast the spell.
+     *
+     * */
+    bool CanCastSpell(uint32 spellID) const;
+
     std::string GetDebugInfo() const override;
 
 protected:

src/server/scripts/EasternKingdoms/Karazhan/boss_shade_of_aran.cpp

@@ -256,7 +256,20 @@ struct boss_shade_of_aran : public BossAI
                 if (AvailableSpells)
                 {
                     CurrentNormalSpell = Spells[rand() % AvailableSpells];
-                    DoCast(target, CurrentNormalSpell);
+
+                    if (!me->CanCastSpell(CurrentNormalSpell))
+                    {
+                        me->SetWalk(false);
+                        me->ResumeChasingVictim();
+                    }
+                    else
+                    {
+                        DoCast(target, CurrentNormalSpell);
+                        if (me->GetVictim())
+                        {
+                            me->GetMotionMaster()->MoveChase(me->GetVictim(), 45.0f);
+                        }
+                    }
                 }
             }
             context.Repeat(2s);