Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When your opponent activates a monster effect on the field: You can target that monster; change it to face-down Defense Position. During the End Phase: You can target 1 face-down Defense Position monster your opponent controls; take control of that monster. You can only use each effect of "Embrace of the Tistina" once per turn, and can only activate them while you control a "Tistina" monster with 3000 or more DEF.
--ティスティナの抱擁
--Embrace of the Tistina
--Scripted by Hatter
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)
	--Change monster to face-down position
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_CHAINING)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.poscon)
	e1:SetTarget(s.postg)
	e1:SetOperation(s.posop)
	c:RegisterEffect(e1)
	--Take control of 1 face-down position monster
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_CONTROL)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_SZONE)
	e2:SetHintTiming(TIMING_END_PHASE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function(e,tp) return Duel.IsPhase(PHASE_END) and Duel.IsExistingMatchingCard(s.deffilter,tp,LOCATION_MZONE,0,1,nil) end)
	e2:SetTarget(s.cttg)
	e2:SetOperation(s.ctop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_TISTINA}
function s.deffilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_TISTINA) and c:IsDefenseAbove(3000)
end
function s.poscon(e,tp,eg,ep,ev,re,r,rp)
	return rp==1-tp and re:IsMonsterEffect() and re:GetActivateLocation()==LOCATION_MZONE and re:GetHandler():IsRelateToEffect(re)
		and Duel.IsExistingMatchingCard(s.deffilter,tp,LOCATION_MZONE,0,1,nil)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local rc=re:GetHandler()
	if chk==0 then return rc:IsCanBeEffectTarget(e) and rc:IsCanTurnSet() end
	Duel.SetTargetCard(rc)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,eg,1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		Duel.ChangePosition(tc,POS_FACEDOWN_DEFENSE)
	end
end
function s.ctfilter(c)
	return c:IsFacedown() and c:IsDefensePos() and c:IsControlerCanBeChanged()
end
function s.cttg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and s.ctfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.ctfilter,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_CONTROL)
	local g=Duel.SelectTarget(tp,s.ctfilter,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_CONTROL,g,1,0,0)
end
function s.ctop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.GetControl(tc,tp)
	end
end