Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Normal or Special Summoned: You can activate 1 of these effects; ● Add 1 "Zubaba" monster from your Deck to your hand, except "Zubababa Knight". This card's Level becomes that added monster's Level. ● Destroy 1 Level 4 or lower Defense Position monster your opponent controls. If this card is detached from an Xyz Monster to activate that monster's effect: You can add 1 "Gagaga" monster from your Deck to your hand. You can only use each effect of "Zubababa Knight" once per turn.
--ズバババナイト
--Zubababa Knight
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Activate 1 of these effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.efftg)
	e1:SetOperation(s.effop)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	--Add 1 "Gagaga" monster from your Deck to your hand
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetCountLimit(1,{id,1})
	e3:SetCondition(s.gathcon)
	e3:SetTarget(s.gathtg)
	e3:SetOperation(s.gathop)
	c:RegisterEffect(e3)
	local e4=e3:Clone()
	e4:SetCode(EVENT_REMOVE)
	c:RegisterEffect(e4)
end
s.listed_series={SET_ZUBABA,SET_GAGAGA}
s.listed_names={id}
function s.zbthfilter(c)
	return c:IsSetCard(SET_ZUBABA) and c:IsMonster() and c:IsAbleToHand() and not c:IsCode(id)
end
function s.desfilter(c)
	return c:IsLevelBelow(4) and c:IsDefensePos() and c:IsFaceup()
end
function s.efftg(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=Duel.GetMatchingGroup(s.desfilter,tp,0,LOCATION_MZONE,nil)
	local b1=Duel.IsExistingMatchingCard(s.zbthfilter,tp,LOCATION_DECK,0,1,nil)
	local b2=#g>0
	if chk==0 then return b1 or b2 end
	local op=Duel.SelectEffect(tp,
		{b1,aux.Stringid(id,2)},
		{b2,aux.Stringid(id,3)})
	e:SetLabel(op)
	if op==1 then
		e:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH+CATEGORY_LVCHANGE)
		Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
	elseif op==2 then
		e:SetCategory(CATEGORY_DESTROY)
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,tp,0)
	end
end
function s.effop(e,tp,eg,ep,ev,re,r,rp)
	local op=e:GetLabel()
	if op==1 then
		--Add 1 "Zubaba" monster from your Deck to your hand, except "Zubababa Knight", and if you do, this card's Level becomes that added monster's
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local sc=Duel.SelectMatchingCard(tp,s.zbthfilter,tp,LOCATION_DECK,0,1,1,nil):GetFirst()
		if sc and Duel.SendtoHand(sc,nil,REASON_EFFECT)>0 then
			Duel.ConfirmCards(1-tp,sc)
			local lv=sc:GetLevel()
			local c=e:GetHandler()
			if c:IsRelateToEffect(e) and c:IsFaceup() and not c:IsLevel(lv) then
				--This card's Level becomes the added monster's
				local e1=Effect.CreateEffect(c)
				e1:SetType(EFFECT_TYPE_SINGLE)
				e1:SetCode(EFFECT_CHANGE_LEVEL)
				e1:SetValue(lv)
				e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE)
				c:RegisterEffect(e1)
			end
		end
	elseif op==2 then
		--Destroy 1 Level 4 or lower Defense Position monster your opponent controls
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
		local g=Duel.SelectMatchingCard(tp,s.desfilter,tp,0,LOCATION_MZONE,1,1,nil)
		if #g>0 then
			Duel.HintSelection(g)
			Duel.Destroy(g,REASON_EFFECT)
		end
	end
end
function s.gathcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsReason(REASON_COST) and re:IsActivated() and re:IsActiveType(TYPE_XYZ) and c:IsPreviousLocation(LOCATION_OVERLAY)
end
function s.gathfilter(c)
	return c:IsSetCard(SET_GAGAGA) and c:IsMonster() and c:IsAbleToHand()
end
function s.gathtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.gathfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.gathop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.gathfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end