Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During your Main Phase: You can Special Summon "La Jinn the Mystical Genie of the Lamp" from your hand. This card must be face-up on the field to activate and to resolve this effect. Before damage calculation, if this card is being attacked by an opponent's monster, and was face-down at the start of the Damage Step: You can target 1 monster your opponent controls, except the attacking monster; the attacking monster attacks it instead, and you proceed to damage calculation.
--マジック・ランプ
--Ancient Lamp
local s,id=GetID()
function s.initial_effect(c)
	--change target
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_BATTLE_CONFIRM)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_names={97590747}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return r~=REASON_REPLACE and Duel.GetAttackTarget()==e:GetHandler() and Duel.GetAttacker():IsControler(1-tp)
		and e:GetHandler():GetBattlePosition()==POS_FACEDOWN_DEFENSE
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) end
	if chk==0 then return Duel.IsExistingTarget(nil,tp,0,LOCATION_MZONE,1,Duel.GetAttacker()) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,nil,tp,0,LOCATION_MZONE,1,1,Duel.GetAttacker())
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	local a=Duel.GetAttacker()
	if tc and tc:IsRelateToEffect(e)
		and a:CanAttack() and not a:IsImmuneToEffect(e) then
		Duel.CalculateDamage(a,tc)
	end
end
function s.spfilter(c,e,tp)
	return c:IsCode(97590747) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	if not e:GetHandler():IsRelateToEffect(e) or e:GetHandler():IsFacedown() then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end