Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If you control a monster whose original name is "The Winged Dragon of Ra", you can activate this card the turn it was Set. During the Main Phase: You can pay LP so that you only have 100 left; 1 Special Summoned "The Winged Dragon of Ra" you control gains ATK/DEF equal to the amount of LP paid (even if this card leaves the field). Once per turn: You can Tribute 1 "The Winged Dragon of Ra"; gain LP equal to its ATK on the field. You cannot activate both of this card's effects in the same Chain.
--太陽神の合一
--Sun God Unification
--Scripted by AlphaKretin
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--Activate the turn it is set
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_TRAP_ACT_IN_SET_TURN)
	e2:SetProperty(EFFECT_FLAG_SET_AVAILABLE)
	e2:SetCondition(s.actcon)
	e2:SetDescription(aux.Stringid(id,2))
	c:RegisterEffect(e2)
	--Increase ATK
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_ATKCHANGE+CATEGORY_DEFCHANGE)
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetHintTiming(TIMING_DAMAGE_STEP)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCondition(s.atkcon)
	e3:SetCost(s.atkcost)
	e3:SetTarget(s.atktg)
	e3:SetOperation(s.atkop)
	c:RegisterEffect(e3)
	--Recover LP
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,1))
	e4:SetCategory(CATEGORY_RECOVER)
	e4:SetType(EFFECT_TYPE_QUICK_O)
	e4:SetCode(EVENT_FREE_CHAIN)
	e4:SetRange(LOCATION_SZONE)
	e4:SetCountLimit(1)
	e4:SetCost(s.lpcost)
	e4:SetTarget(s.lptg)
	e4:SetOperation(s.lpop)
	c:RegisterEffect(e4)
end
s.listed_names={CARD_RA}
function s.actcon(e)
	return Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsOriginalCodeRule,CARD_RA),e:GetHandlerPlayer(),LOCATION_MZONE,0,1,nil)
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsMainPhase()
end
function s.atkcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local cost=Duel.GetLP(tp)-100
	if chk==0 then return cost>0 end
	e:SetLabel(cost)
	Duel.PayLPCost(tp,cost)
end
function s.atkfilter(c)
	return c:IsFaceup() and c:IsCode(CARD_RA) and c:IsSpecialSummoned()
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.atkfilter,tp,LOCATION_MZONE,0,1,nil) and Duel.GetFlagEffect(tp,id)==0 end
	Duel.RegisterFlagEffect(tp,id,RESET_CHAIN,0,1)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATTACK)
	local tc=Duel.SelectMatchingCard(tp,s.atkfilter,tp,LOCATION_MZONE,0,1,1,nil):GetFirst()
	local atk=e:GetLabel()
	if atk>0 and tc then
		tc:UpdateAttack(atk,nil,c)
		tc:UpdateDefense(atk,nil,c)
	end
end
function s.lpcost(e,tp,eg,ep,ev,re,r,rp,chk)
	e:SetLabel(1)
	if chk==0 then return true end
end
function s.lpfilter(c)
	return c:IsFaceup() and c:IsCode(CARD_RA) and c:GetAttack()>0
end
function s.lptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		if e:GetLabel()~=1 then return false end
		e:SetLabel(0)
		return Duel.CheckReleaseGroupCost(tp,s.lpfilter,1,false,nil,nil) and Duel.GetFlagEffect(tp,id)==0 end
	local sg=Duel.SelectReleaseGroupCost(tp,s.lpfilter,1,1,false,nil,nil)
	local tc=sg:GetFirst()
	local rec=tc:GetAttack()
	Duel.Release(tc,REASON_COST)
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(rec)
	Duel.SetOperationInfo(0,CATEGORY_RECOVER,nil,0,tp,rec)
	Duel.RegisterFlagEffect(tp,id,RESET_CHAIN,0,1)
end
function s.lpop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Recover(p,d,REASON_EFFECT)
end