Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Special Summoned from the hand in Attack Position: You can target 1 face-up Effect Monster your opponent controls; change this card to Defense Position, also negate the effects of that monster while this monster is in face-up Defense Position. If a monster(s) is Special Summoned to your opponent's field, while this card is in your GY (except during the Damage Step): You can discard 1 card; add this card to your hand. You can only use each effect of "Goblin Freefall Squad" once per turn.
--ゴブリン降下部隊
--Goblin Freefall Squad
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Change this card to Defense Position and negate the target's effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION+CATEGORY_DISABLE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.poscon)
	e1:SetTarget(s.postg)
	e1:SetOperation(s.posop)
	c:RegisterEffect(e1)
	--Add this card to your hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY,EFFECT_FLAG2_CHECK_SIMULTANEOUS)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function(e,tp,eg) return eg:IsExists(Card.IsControler,1,nil,1-tp) end)
	e2:SetCost(s.thcost)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
function s.poscon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsAttackPos() and c:IsSummonLocation(LOCATION_HAND)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and chkc:IsFaceup() and chkc:IsType(TYPE_EFFECT) end
	local c=e:GetHandler()
	if chk==0 then return c:IsCanChangePosition() and Duel.IsExistingTarget(aux.FaceupFilter(Card.IsType,TYPE_EFFECT),tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,aux.FaceupFilter(Card.IsType,TYPE_EFFECT),tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,c,1,tp,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) or c:IsFacedown() or c:IsDefensePos() or Duel.ChangePosition(c,POS_FACEUP_DEFENSE)==0 then return end
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) or tc:IsFacedown() then return end
	c:SetCardTarget(tc)
	--Negate its effects
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EFFECT_DISABLE)
	e1:SetCondition(function() return c:IsDefensePos() and c:GetFirstCardTarget()==tc end)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_DISABLE_EFFECT)
	e2:SetValue(RESET_TURN_SET)
	tc:RegisterEffect(e2)
end
function s.thcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsAbleToHand() end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,c,1,tp,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SendtoHand(c,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,c)
	end
end