Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
"Spirit Reaper" + "Nightmare Horse" This card is not destroyed as a result of battle. Destroy this card when it is targeted by the effect of a Spell, Trap, or Effect Monster. This card can attack your opponent's Life Points directly even if there is a monster on your opponent's side of the field. If this card successfully attacks your opponent's Life Points directly, your opponent discards 1 card randomly from his/her hand.
--ナイトメアを駆る死霊
--Reaper on the Nightmare
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,23205979,59290628)
	--battle indestructable
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	--handes
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_HANDES)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_BATTLE_DAMAGE)
	e2:SetCondition(s.condition)
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
	--self des
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCode(EFFECT_SELF_DESTROY)
	e3:SetCondition(s.sdcon)
	c:RegisterEffect(e3)
	--be target
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e4:SetRange(LOCATION_MZONE)
	e4:SetCode(EVENT_CHAIN_SOLVED)
	e4:SetOperation(s.desop1)
	c:RegisterEffect(e4)
	local e5=e4:Clone()
	e5:SetCode(EVENT_BATTLED)
	e5:SetOperation(s.desop2)
	c:RegisterEffect(e5)
	local e6=e4:Clone()
	e6:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e6:SetCode(EVENT_BECOME_TARGET)
	e6:SetOperation(s.register)
	c:RegisterEffect(e6)
	--direct attack
	local e7=Effect.CreateEffect(c)
	e7:SetType(EFFECT_TYPE_SINGLE)
	e7:SetCode(EFFECT_DIRECT_ATTACK)
	c:RegisterEffect(e7)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return ep~=tp and Duel.GetAttackTarget()==nil
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_HANDES,0,0,1-tp,1)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetFieldGroup(ep,LOCATION_HAND,0)
	if #g==0 then return end
	local sg=g:RandomSelect(1-tp,1)
	Duel.SendtoGrave(sg,REASON_DISCARD|REASON_EFFECT)
end
function s.sdcon(e)
	return e:GetHandler():GetOwnerTargetCount()>0
end
function s.register(e,tp,eg,ep,ev,re,r,rp)
	e:GetHandler():RegisterFlagEffect(id+1,RESET_CHAIN,0,1,ev)
end
function s.desop1(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS)
	if not g or not g:IsContains(c) then return false end
	for _,ch in ipairs({c:GetFlagEffectLabel(id+1)}) do
		if ch==ev then
			if (Duel.GetCurrentPhase()&(PHASE_DAMAGE|PHASE_DAMAGE_CAL))~=0 and not Duel.IsDamageCalculated() then
				c:RegisterFlagEffect(id,RESET_PHASE|PHASE_DAMAGE|RESETS_STANDARD,0,1)
			elseif not c:IsHasEffect(EFFECT_DISABLE) and not c:IsDisabled() then
				Duel.Destroy(c,REASON_EFFECT)
			end
			return
		end
	end
end
function s.desop2(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:GetFlagEffect(id)>0 and not c:IsHasEffect(EFFECT_DISABLE) and not c:IsDisabled() then
		Duel.Destroy(c,REASON_EFFECT)
	end
end