--下克上の首飾り
function c5183693.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(c5183693.target)
	e1:SetOperation(c5183693.operation)
	c:RegisterEffect(e1)
	--atk up
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EVENT_DAMAGE_CALCULATING)
	e2:SetRange(LOCATION_SZONE)
	e2:SetOperation(c5183693.atkup)
	c:RegisterEffect(e2)
	--Equip limit
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_EQUIP_LIMIT)
	e3:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e3:SetValue(c5183693.eqlimit)
	c:RegisterEffect(e3)
	--todeck
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(5183693,0))
	e4:SetCategory(CATEGORY_TODECK)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e4:SetCode(EVENT_TO_GRAVE)
	e4:SetTarget(c5183693.tdtg)
	e4:SetOperation(c5183693.tdop)
	c:RegisterEffect(e4)
end
function c5183693.eqlimit(e,c)
	return c:IsType(TYPE_NORMAL)
end
function c5183693.filter(c)
	return c:IsFaceup() and c:IsType(TYPE_NORMAL)
end
function c5183693.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:GetLocation()==LOCATION_MZONE and c5183693.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(c5183693.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	Duel.SelectTarget(tp,c5183693.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,e:GetHandler(),1,0,0)
end
function c5183693.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if e:GetHandler():IsRelateToEffect(e) and tc:IsRelateToEffect(e) and tc:IsFaceup() then
		Duel.Equip(tp,e:GetHandler(),tc)
	end
end
function c5183693.atkup(e,tp,eg,ep,ev,re,r,rp)
	local eqc=e:GetHandler():GetEquipTarget()
	local a=Duel.GetAttacker()
	local d=Duel.GetAttackTarget()
	if not d or (a~=eqc and d~=eqc) then return end
	local la=a:GetLevel()
	local ld=d:GetLevel()
	if (a==eqc and ld<=la) or (d==eqc and la<=ld) then return end
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetReset(RESET_PHASE+PHASE_DAMAGE_CAL)
	if a==eqc then
		e1:SetValue((ld-la)*500)
		a:RegisterEffect(e1)
	else
		e1:SetValue((la-ld)*500)
		d:RegisterEffect(e1)
	end
end
function c5183693.tdtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsAbleToDeck() end
	Duel.SetOperationInfo(0,CATEGORY_TODECK,e:GetHandler(),1,0,0)
end
function c5183693.tdop(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsRelateToEffect(e) then
		Duel.SendtoDeck(e:GetHandler(),nil,0,REASON_EFFECT)
	end
end
