struct npc_trilliax_sludgerax : public ScriptedAI
{
    npc_trilliax_sludgerax(Creature* creature) : ScriptedAI(creature), putridDies(0)
    {
        instance = me->GetInstanceScript();
        me->SetReactState(REACT_PASSIVE);
        me->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE | UNIT_FLAG_IMMUNE_TO_PC | UNIT_FLAG_IMMUNE_TO_NPC | UNIT_FLAG_NOT_ATTACKABLE_1);
    }

    InstanceScript* instance;
    uint8 putridDies = 0;

    void Reset() override {}

    void IsSummonedBy(Unit* summoner) override
    {
        for (const auto & sludgeraxSumPo : sludgeraxSumPos)
            me->SummonCreature(NPC_PUTRID_SLUDGE, sludgeraxSumPo);

        putridDies = 0;
        DoCast(me, SPELL_BURSTING_SLIME, true);
        DoCast(me, SPELL_DEATH_COSMETIC_2, true);
    }

    void SummonedCreatureDies(Creature* summon, Unit* /*killer*/) override
    {
        if (summon->GetEntry() == NPC_PUTRID_SLUDGE)
        {
            if (++putridDies == 8)
            {
                me->SetReactState(REACT_AGGRESSIVE);
                me->RemoveFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE | UNIT_FLAG_IMMUNE_TO_PC | UNIT_FLAG_IMMUNE_TO_NPC | UNIT_FLAG_NOT_ATTACKABLE_1);
                me->RemoveAurasDueToSpell(SPELL_DEATH_COSMETIC_2);
            }
        }
    }

    void JustDied(Unit* /*killer*/) override
    {
        if (instance->GetData(DATA_TRILLIAX_INTRO) != DONE)
        {
            instance->SetData(DATA_TRILLIAX_INTRO, DONE);

            if (Unit* owner = me->GetAnyOwner())
                owner->GetAI()->DoAction(ACTION_1);
        }
    }

    void UpdateAI(uint32 diff) override
    {
        if (!UpdateVictim())
            return;

        if (me->HasUnitState(UNIT_STATE_CASTING))
            return;

        DoMeleeAttackIfReady();
    }
};