--ペンデュラム・ストーム
--Pendulum Storm
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter2(c)
	return c:IsSpellTrap()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetFieldGroupCount(tp,LOCATION_PZONE,LOCATION_PZONE)>0 end
	local g=Duel.GetFieldGroup(tp,LOCATION_PZONE,LOCATION_PZONE)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetFieldGroup(tp,LOCATION_PZONE,LOCATION_PZONE)
	if Duel.Destroy(g,REASON_EFFECT)~=0 then
		local dg=Duel.GetMatchingGroup(s.filter2,tp,0,LOCATION_ONFIELD,nil)
		if #dg>0 and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
			Duel.BreakEffect()
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
			local sg=dg:Select(tp,1,1,nil)
			Duel.HintSelection(sg)
			Duel.Destroy(sg,REASON_EFFECT)
		end
	end
end