Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Add 1 "Starry Knight" monster, or 1 Level 7 LIGHT Dragon monster, from your Deck to your hand, then, if you control no monsters and your opponent controls a DARK monster, you can Special Summon 1 Level 7 LIGHT Dragon monster from your hand. You can only activate 1 "Starry Knight Balefire" per turn.
--聖なる篝火
--Starry Knight Balefire
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--dd 1 "Starry Knight" monster, or 1 Level 7 LIGHT Dragon monster, from your Deck to your hand, then, if you control no monsters and your opponent controls a DARK monster, you can Special Summon 1 Level 7 LIGHT Dragon monster from your hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH+CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_STARRY_KNIGHT}
function s.lv7lightdragonfilter(c)
	return c:IsLevel(7) and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_DRAGON)
end
function s.thfilter(c)
	return (c:IsSetCard(SET_STARRY_KNIGHT) or s.lv7lightdragonfilter(c)) and c:IsMonster() and c:IsAbleToHand()
end
function s.target(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)
	Duel.SetPossibleOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.spfilter(c,e,tp)
	return s.lv7lightdragonfilter(c) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.activate(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 or Duel.SendtoHand(g,nil,REASON_EFFECT)==0 then return end
	Duel.ConfirmCards(1-tp,g)
	Duel.ShuffleHand(tp)
	if Duel.GetFieldGroupCount(tp,LOCATION_MZONE,0)==0 and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsAttribute,ATTRIBUTE_DARK),tp,0,LOCATION_MZONE,1,nil)
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp)
		and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local sg=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
		if #sg>0 then
			Duel.BreakEffect()
			Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP)
		end
	end
end