Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
[ Pendulum Effect ] At the start of the Damage Step, if a monster you control battles an opponent's face-up monster: You can discard 1 card; the opponent's battling monster's ATK and DEF become half its current ATK and DEF (even if this card leaves the field). ---------------------------------------- [ Monster Effect ] If this card in its owner's Monster Zone is destroyed by your opponent's attack or card effect: You can add 1 Warrior or Spellcaster-Type monster with 2000 or less ATK from your Deck to your hand, except "Dragodies, the Empowered Warrior", during the End Phase of this turn.
--魔装戦士 ドラゴディウス
--Dragodies, the Empowered Warrior
local s,id=GetID()
function s.initial_effect(c)
	--Pendulum Summon
	Pendulum.AddProcedure(c)
	--Halve ATK/DEF
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_BATTLE_START)
	e1:SetRange(LOCATION_PZONE)
	e1:SetCondition(s.atkcon)
	e1:SetCost(s.atkcost)
	e1:SetOperation(s.atkop)
	c:RegisterEffect(e1)
	--Search 1 Warrior or Spellcaster with 2000 or less ATK
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SEARCH+CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_DESTROYED)
	e2:SetCondition(s.regcon)
	e2:SetTarget(s.regtg)
	e2:SetOperation(s.regop)
	c:RegisterEffect(e2)
end
s.listed_names={id}
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	local tc,bc=Duel.GetBattleMonster(tp)
	if not (tc and bc and bc:IsFaceup()) then return false end
	e:SetLabelObject(bc)
	return true
end
function s.atkcost(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_DISCARD+REASON_COST,nil)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local bc=e:GetLabelObject()
	if bc:IsRelateToBattle() and bc:IsFaceup() and bc:IsControler(1-tp) then
		--Halve ATK/DEF
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetValue(bc:GetAttack()/2)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		bc:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_SET_DEFENSE_FINAL)
		e2:SetValue(bc:GetDefense()/2)
		bc:RegisterEffect(e2)
	end
end
function s.regcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return rp==1-tp and c:IsPreviousControler(tp) and c:IsPreviousLocation(LOCATION_MZONE)
		and (c:IsReason(REASON_EFFECT) or (c:IsReason(REASON_BATTLE) and Duel.GetAttacker():IsControler(1-tp)))
end
function s.regtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetPossibleOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetCountLimit(1)
	e1:SetCondition(s.thcon)
	e1:SetOperation(s.thop)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
end
function s.thfilter(c)
	return c:IsAttackBelow(2000) and c:IsRace(RACE_WARRIOR|RACE_SPELLCASTER) and not c:IsCode(id) and c:IsAbleToHand()
end
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_CARD,0,id)
	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