--魂の交換－ソウル・バーター
--Soul Barter
--Scripted by Snrk
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon 1 monster from the GY
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.cstfilter(c,tp)
	return c:IsAbleToGraveAsCost() and Duel.GetMZoneCount(tp,c)>0
end
function s.spfilter(c,e,tp)
	return c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cstfilter,tp,LOCATION_MZONE,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.cstfilter,tp,LOCATION_MZONE,0,1,1,nil,tp)
	Duel.SendtoGrave(g,REASON_COST)
	e:SetLabelObject(g:GetFirst())
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_GRAVE,0,1,e:GetLabelObject(),e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_GRAVE)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,e:GetLabelObject(),e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end