--鉄獣の撃鉄
local s,id,o=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SEARCH+CATEGORY_TOHAND+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.thfilter(c)
	return not c:IsCode(id) and c:IsSetCard(0x14d) and c:IsType(TYPE_SPELL+TYPE_TRAP) and c:IsAbleToHand()
end
function s.cfilter(c)
	return c:IsSetCard(0x14d) and c:IsAbleToRemoveAsCost()
end
function s.fselect(g,tg)
	return tg:IsExists(Card.IsLink,1,nil,#g)
end
function s.spfilter(c,e,tp)
	return c:IsType(TYPE_LINK) and c:IsSetCard(0x14d)
		and c:IsCanBeSpecialSummoned(e,0,tp,true,false) and Duel.GetLocationCountFromEx(tp,tp,nil,c)>0
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local ch=Duel.GetCurrentChain()
	local b1=Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
		and (not e:IsCostChecked()
			or Duel.GetFlagEffect(tp,id)==0)
	local cg=Duel.GetMatchingGroup(s.cfilter,tp,LOCATION_GRAVE,0,nil)
	local tg=Duel.GetMatchingGroup(s.spfilter,tp,LOCATION_EXTRA,0,nil,e,tp)
	local _,maxlink=tg:GetMaxGroup(Card.GetLink)
	local b2=cg:CheckSubGroup(s.fselect,1,maxlink,tg)
		and (not e:IsCostChecked()
			or Duel.GetFlagEffect(tp,id+o)==0)
	if chk==0 then return b1 or b2 end
	local op=0
	if b1 or b2 then
		op=aux.SelectFromOptions(tp,
			{b1,aux.Stringid(id,1),1},
			{b2,aux.Stringid(id,2),2})
	end
	if op==1 then
		if e:IsCostChecked() then
			e:SetCategory(CATEGORY_SEARCH+CATEGORY_TOHAND)
			Duel.RegisterFlagEffect(tp,id,RESET_PHASE+PHASE_END,0,1)
		end
		e:SetLabel(op,0)
		Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
	elseif op==2 then
		if e:IsCostChecked() then
			Duel.RegisterFlagEffect(tp,id+o,RESET_PHASE+PHASE_END,0,1)
			e:SetCategory(CATEGORY_SPECIAL_SUMMON)
		end
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
		local rg=cg:SelectSubGroup(tp,s.fselect,false,1,maxlink,tg)
		Duel.Remove(rg,POS_FACEUP,REASON_COST)
		e:SetLabel(op,rg:GetCount())
		Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
	end
end
function s.spfilter1(c,e,tp,lk)
	return s.spfilter(c,e,tp) and c:IsLink(lk)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local op,lk=e:GetLabel()
	if op==1 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
		if g:GetCount()>0 then
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
	elseif op==2 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.spfilter1,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,lk)
		local tc=g:GetFirst()
		if tc then
			Duel.SpecialSummon(tc,0,tp,tp,true,false,POS_FACEUP)
		end
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD)
		e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
		e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
		e1:SetTargetRange(1,0)
		e1:SetTarget(s.splimit)
		e1:SetReset(RESET_PHASE+PHASE_END)
		Duel.RegisterEffect(e1,tp)
	end
end
function s.splimit(e,c)
	return c:IsLocation(LOCATION_EXTRA) and not c:IsRace(RACE_BEAST+RACE_BEASTWARRIOR+RACE_WINDBEAST)
end