--アーマード・グラビテーション
--Armored Gravitation
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter(c,e,tp)
	return c:IsLevelBelow(4) and c:IsType(TYPE_ARMOR) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	if ft<=0 then return end
	if ft>4 then ft=4 end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,ft,nil,e,tp)
	if #g>0 then
		local fid=e:GetHandler():GetFieldID()
		local tc=g:GetFirst()
		for tc in aux.Next(g) do
			Duel.SpecialSummonStep(tc,0,tp,tp,false,false,POS_FACEUP_ATTACK)
			tc:RegisterFlagEffect(id,RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_END,0,1,fid)
		end
		Duel.SpecialSummonComplete()
		g:KeepAlive()
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EVENT_PHASE+PHASE_END)
		e1:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
		e1:SetReset(RESET_PHASE+PHASE_END)
		e1:SetCountLimit(1)
		e1:SetLabel(fid)
		e1:SetLabelObject(g)
		e1:SetCondition(s.tgcon)
		e1:SetOperation(s.tgop)
		Duel.RegisterEffect(e1,tp)
	end
end
function s.tgfilter(c,fid)
	return c:GetFlagEffectLabel(id)==fid
end
function s.tgcon(e,tp,eg,ep,ev,re,r,rp)
	local g=e:GetLabelObject()
	if not g:IsExists(s.tgfilter,1,nil,e:GetLabel()) then
		g:DeleteGroup()
		e:Reset()
		return false
	else return true end
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local g=e:GetLabelObject()
	local tg=g:Filter(s.tgfilter,nil,e:GetLabel())
	g:DeleteGroup()
	Duel.SendtoGrave(tg,REASON_EFFECT)
end