Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If all monsters you control are monsters with 600 DEF (min. 1): You can Special Summon this card from your hand. (Quick Effect): You can discard 1 card, then target 1 LIGHT Fairy monster you control and 1 face-up monster on the field; the Level of your monster becomes the other monster's Level, until the end of this turn. You can only use each effect of "Cupid Fore" once per turn.
--コウ・キューピット
--Cupid Fore
--Scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon itself from the hand if all monsters have 600 DEF
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--Change level of a LIGHT Fairy monster
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_LVCHANGE)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_MZONE)
	e2:SetHintTiming(0,TIMINGS_CHECK_MONSTER|TIMING_MAIN_END)
	e2:SetCountLimit(1,{id,1})
	e2:SetCost(s.lvcst)
	e2:SetTarget(s.lvtg)
	e2:SetOperation(s.lvop)
	c:RegisterEffect(e2)
end
function s.cfilter(c)
	return c:IsFaceup() and c:GetDefense()==600
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetFieldGroup(tp,LOCATION_MZONE,0)
	return #g>0 and g:FilterCount(s.cfilter,nil)==#g
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.lvcst(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,nil)
end
function s.filter1(c,tp)
	return c:IsFaceup() and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_FAIRY) and c:HasLevel()
		and Duel.IsExistingTarget(s.lvfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,c,c:GetLevel()) 
end
function s.lvfilter(c,lv)
	return c:IsMonster() and c:IsFaceup() and c:HasLevel() and c:GetLevel()~=lv
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	if chk==0 then return Duel.IsExistingTarget(s.filter1,tp,LOCATION_MZONE,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,aux.Stringid(id,2))
	local g1=Duel.SelectTarget(tp,s.filter1,tp,LOCATION_MZONE,0,1,1,nil,tp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local g2=Duel.SelectTarget(tp,s.lvfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,g1:GetFirst(),g1:GetFirst():GetLevel())
	e:SetLabelObject(g1:GetFirst())
	Duel.SetOperationInfo(0,CATEGORY_LVCHANGE,g1:GetFirst(),1,0,0)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local c1=e:GetLabelObject()
	local g=Duel.GetChainInfo(0,CHAININFO_TARGET_CARDS)
	local tc=g:GetFirst()
	if tc==c1 then tc=g:GetNext() end
	if not c1:HasLevel() or c1:IsFacedown() or not c1:IsRelateToEffect(e) or not c1:IsControler(tp) then return end
	if tc:IsFaceup() and tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetValue(tc:GetLevel())
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		c1:RegisterEffect(e1)
	end
end