--ギアギアタッカー
--Geargiattacker
local s,id=GetID()
function s.initial_effect(c)
	--turn set
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--destroy
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DESTROY)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCode(EVENT_FLIP)
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_GEARGIA}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsCanTurnSet() and c:GetFlagEffect(id)==0 end
	c:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD-RESET_TURN_SET|RESET_PHASE|PHASE_END,0,1)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,c,1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and c:IsFaceup() then
		Duel.ChangePosition(c,POS_FACEDOWN_DEFENSE)
	end
end
function s.cfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_GEARGIA)
end
function s.filter(c)
	return c:IsSpellTrap()
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE,0,1,e:GetHandler())
		and Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local ct=Duel.GetMatchingGroupCount(s.cfilter,tp,LOCATION_MZONE,0,e:GetHandler())
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil)
	if ct>0 and #g>0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
		local dg=g:Select(tp,1,ct,nil)
		Duel.HintSelection(dg)
		Duel.Destroy(dg,REASON_EFFECT)
	end
end