Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can discard 1 card; add 1 "Gladiator Beast" monster from your Deck to your hand. When an opponent's monster declares an attack: You can Special Summon 1 "Gladiator Beast" monster from your Deck, and it cannot be destroyed by battle. During the End Phase, if a "Gladiator Beast" monster was Special Summoned from your Deck this turn: You can Set 1 "Gladiator" Trap from your Deck. You can only use each effect of "Flavian - Colosseum of the Gladiator Beasts" once per turn.
--剣闘獣の闘技場－フラヴィス
--Flavian - Colosseum of the Gladiator Beasts
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--Add 1 "Gladiator Beast" monster from your Deck to your hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_FZONE)
	e1:SetCountLimit(1,id)
	e1:SetCost(s.thcost)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	--Special Summon 1 "Gladiator Beast" monster from your Deck
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_ATTACK_ANNOUNCE)
	e2:SetRange(LOCATION_FZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function(e,tp) return Duel.GetAttacker():IsControler(1-tp) end)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	--Set 1 "Gladiator" Trap from your Deck
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_PHASE+PHASE_END)
	e3:SetRange(LOCATION_FZONE)
	e3:SetCountLimit(1,{id,2})
	e3:SetCondition(function(e,tp) return Duel.HasFlagEffect(tp,id) end)
	e3:SetTarget(s.settg)
	e3:SetOperation(s.setop)
	c:RegisterEffect(e3)
	--Register if a "Gladiator Beast" monster is Special Summoned from the Deck
	aux.GlobalCheck(s,function()
		local ge1=Effect.CreateEffect(c)
		ge1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		ge1:SetCode(EVENT_SPSUMMON_SUCCESS)
		ge1:SetOperation(s.checkop)
		Duel.RegisterEffect(ge1,0)
	end)
end
s.listed_series={SET_GLADIATOR_BEAST,SET_GLADIATOR}
function s.setconfilter(c)
	return c:IsSetCard(SET_GLADIATOR_BEAST) and c:IsSpecialSummoned() and c:IsSummonLocation(LOCATION_DECK) and c:IsFaceup()
end
function s.checkop(e,tp,eg,ep,ev,re,r,rp)
	local sg=eg:Filter(s.setconfilter,nil)
	for sc in sg:Iter() do
		local prev_ctrl=sc:GetPreviousControler()
		if not Duel.HasFlagEffect(prev_ctrl,id) then
			Duel.RegisterFlagEffect(prev_ctrl,id,RESET_PHASE|PHASE_END,0,1)
		end
	end
end
function s.thcost(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)
end
function s.thfilter(c)
	return c:IsSetCard(SET_GLADIATOR_BEAST) and c:IsMonster() and c:IsAbleToHand()
end
function s.thtg(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)
end
function s.thop(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 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_GLADIATOR_BEAST) 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_DECK,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sc=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_DECK,0,1,1,nil,e,tp):GetFirst()
	if sc and Duel.SpecialSummon(sc,0,tp,tp,false,false,POS_FACEUP)>0 then
		--It cannot be destroyed by battle
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetDescription(3000)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CLIENT_HINT)
		e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
		e1:SetValue(1)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		sc:RegisterEffect(e1)
	end
end
function s.setfilter(c)
	return c:IsSetCard(SET_GLADIATOR) and c:IsTrap() and c:IsSSetable()
end
function s.settg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.setfilter,tp,LOCATION_DECK,0,1,nil) end
end
function s.setop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SET)
	local g=Duel.SelectMatchingCard(tp,s.setfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SSet(tp,g)
	end
end