Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Normal or Special Summoned: You can add 1 "Gem-Knight" card from your Deck to your hand, except "Gem-Knight Nepyrim", also any effect damage your opponent takes during the Main Phase this turn is halved. During your Main Phase, you can: Immediately after this effect resolves, Normal Summon 1 "Gem-" monster. If this card is sent from the hand or Deck to the GY: You can send 1 card from your hand to the GY, and if you do, Special Summon this card. You can only use each effect of "Gem-Knight Nepyrim" once per turn.
--ジェムナイト・ネピリム
--Gem-Knight Nepyrim
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Add 1 "Gem-Knight" card from your Deck to your hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	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.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	--Normal Summon 1 "Gem-" monster
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SUMMON)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,{id,1})
	e3:SetTarget(s.nstg)
	e3:SetOperation(s.nsop)
	c:RegisterEffect(e3)
	--Send 1 card from your hand to the GY, and if you do, Special Summon this card
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,2))
	e4:SetCategory(CATEGORY_TOGRAVE+CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e4:SetProperty(EFFECT_FLAG_DELAY)
	e4:SetCode(EVENT_TO_GRAVE)
	e4:SetCountLimit(1,{id,2})
	e4:SetCondition(function(e) return e:GetHandler():IsPreviousLocation(LOCATION_HAND|LOCATION_DECK) end)
	e4:SetTarget(s.tgtg)
	e4:SetOperation(s.tgop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_GEM_KNIGHT,SET_GEM}
s.listed_names={id}
function s.thfilter(c)
	return c:IsSetCard(SET_GEM_KNIGHT) and c:IsAbleToHand() and not c:IsCode(id)
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
	--Any effect damage your opponent takes during the Main Phase this turn is halved
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetDescription(aux.Stringid(id,3))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_CLIENT_HINT)
	e1:SetCode(EFFECT_CHANGE_DAMAGE)
	e1:SetTargetRange(0,1)
	e1:SetCondition(function() return Duel.IsMainPhase() end)
	e1:SetValue(function(e,re,val,r,rp,rc) return (r&REASON_EFFECT>0) and val//2 or val end)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
end
function s.nsfilter(c)
	return c:IsSetCard(SET_GEM) and c:IsSummonable(true,nil)
end
function s.nstg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.nsfilter,tp,LOCATION_HAND|LOCATION_MZONE,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_SUMMON,nil,1,tp,LOCATION_HAND|LOCATION_MZONE)
end
function s.nsop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SUMMON)
	local tc=Duel.SelectMatchingCard(tp,s.nsfilter,tp,LOCATION_HAND|LOCATION_MZONE,0,1,1,nil):GetFirst()
	if tc then
		Duel.Summon(tp,tc,true,nil)
	end
end
function s.tgtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsAbleToGrave,tp,LOCATION_HAND,0,1,nil)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_HAND)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local sc=Duel.SelectMatchingCard(tp,Card.IsAbleToGrave,tp,LOCATION_HAND,0,1,1,nil):GetFirst()
	if sc and Duel.SendtoGrave(sc,REASON_EFFECT)>0 and sc:IsLocation(LOCATION_GRAVE)
		and c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
	end
end