--ジェムナイト・ディスパージョン
local s,id,o=GetID()
---@param c Card
function s.initial_effect(c)
	aux.AddCodeList(c,1264319)
	--Activate 1
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON|CATEGORY_FUSION_SUMMON|CATEGORY_SEARCH|CATEGORY_TOHAND|CATEGORY_DECKDES)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.fusion_effect=true
function s.filter0(c)
	return c:IsSetCard(0x1047) and not c:IsRace(RACE_ROCK)
		and c:IsType(TYPE_MONSTER) and c:IsCanBeFusionMaterial() and c:IsAbleToGrave()
end
function s.filter1(c,e)
	return not c:IsImmuneToEffect(e)
end
function s.filter2(c,e,tp,m,f,chkf)
	return c:IsType(TYPE_FUSION) and c:IsSetCard(0x1047) and (not f or f(c))
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_FUSION,tp,false,false) and c:CheckFusionMaterial(m,nil,chkf)
end
function s.thfilter(c)
	return c:IsFaceupEx() and c:IsSetCard(0x47) and c:IsType(TYPE_MONSTER) and c:IsAbleToHand()
end
function s.fcheck(tp,sg,fc)
	return sg:FilterCount(Card.IsLocation,nil,LOCATION_DECK+LOCATION_EXTRA)<=2
end
function s.gcheck(sg)
	return sg:FilterCount(Card.IsLocation,nil,LOCATION_DECK+LOCATION_EXTRA)<=2
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local chkf=tp
	local mg1=Duel.GetFusionMaterial(tp):Filter(s.filter1,nil,e)
	if Duel.IsExistingMatchingCard(Card.IsCode,tp,LOCATION_GRAVE,0,1,nil,1264319) then
		local sg=Duel.GetMatchingGroup(s.filter0,tp,LOCATION_DECK+LOCATION_EXTRA,0,nil)
		mg1:Merge(sg)
		aux.FCheckAdditional=s.fcheck
		aux.GCheckAdditional=s.gcheck
	end
	local res=Duel.IsExistingMatchingCard(s.filter2,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg1,nil,chkf)
	aux.FCheckAdditional=nil
	aux.GCheckAdditional=nil
	if not res then
		local ce=Duel.GetChainMaterial(tp)
		if ce~=nil then
			local fgroup=ce:GetTarget()
			local mg2=fgroup(ce,e,tp)
			local mf=ce:GetValue()
			res=Duel.IsExistingMatchingCard(s.filter2,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg2,mf,chkf)
		end
	end
	local b1=res and Duel.GetFlagEffect(tp,id)==0
	local b2=Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK+LOCATION_REMOVED,0,1,nil) and Duel.GetFlagEffect(tp,id+o)==0
	if chk==0 then return b1 or b2 end
	local op=0
	if b1 and not b2 then
		Duel.Hint(HINT_OPSELECTED,1-tp,aux.Stringid(id,1))
		op=1
	end
	if b2 and not b1 then
		Duel.Hint(HINT_OPSELECTED,1-tp,aux.Stringid(id,2))
		op=2
	end
	if b1 and b2 then
		op=aux.SelectFromOptions(tp,
			{b1,aux.Stringid(id,1)},
			{b2,aux.Stringid(id,2)})
	end
	e:SetLabel(op)
	if op==1 then
		e:SetCategory(CATEGORY_SPECIAL_SUMMON|CATEGORY_FUSION_SUMMON|CATEGORY_DECKDES)
		Duel.RegisterFlagEffect(tp,id,RESET_PHASE+PHASE_END,0,1)
		Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
	elseif op==2 then
		e:SetLabel(2)
		e:SetCategory(CATEGORY_SEARCH|CATEGORY_TOHAND)
		Duel.RegisterFlagEffect(tp,id+o,RESET_PHASE+PHASE_END,0,1)
		Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK+LOCATION_REMOVED)
	end
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if e:GetLabel()==1 then
		local chkf=tp
		local mg1=Duel.GetFusionMaterial(tp):Filter(s.filter1,nil,e)
		local exmat=false
		if Duel.IsExistingMatchingCard(Card.IsCode,tp,LOCATION_GRAVE,0,1,nil,1264319) then
			local sg=Duel.GetMatchingGroup(s.filter0,tp,LOCATION_DECK+LOCATION_EXTRA,0,nil,e)
			if sg:GetCount()>0 then
				mg1:Merge(sg)
				exmat=true
			end
		end
		if exmat then
			aux.FCheckAdditional=s.fcheck
			aux.GCheckAdditional=s.gcheck
		end
		local sg1=Duel.GetMatchingGroup(s.filter2,tp,LOCATION_EXTRA,0,nil,e,tp,mg1,nil,chkf)
		aux.FCheckAdditional=nil
		aux.GCheckAdditional=nil
		local mg2=nil
		local sg2=nil
		local ce=Duel.GetChainMaterial(tp)
		if ce~=nil then
			local fgroup=ce:GetTarget()
			mg2=fgroup(ce,e,tp)
			local mf=ce:GetValue()
			sg2=Duel.GetMatchingGroup(s.filter2,tp,LOCATION_EXTRA,0,nil,e,tp,mg2,mf,chkf)
		end
		if sg1:GetCount()>0 or (sg2~=nil and sg2:GetCount()>0) then
			local sg=sg1:Clone()
			if sg2 then sg:Merge(sg2) end
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local tg=sg:Select(tp,1,1,nil)
			local tc=tg:GetFirst()
			mg1:RemoveCard(tc)
			if sg1:IsContains(tc) and (sg2==nil or not sg2:IsContains(tc) or ce and not Duel.SelectYesNo(tp,ce:GetDescription())) then
				if exmat then
					aux.FCheckAdditional=s.fcheck
					aux.GCheckAdditional=s.gcheck
				end
				local mat1=Duel.SelectFusionMaterial(tp,tc,mg1,nil,chkf)
				aux.FCheckAdditional=nil
				aux.GCheckAdditional=nil
				tc:SetMaterial(mat1)
				Duel.SendtoGrave(mat1,REASON_EFFECT+REASON_MATERIAL+REASON_FUSION)
				Duel.BreakEffect()
				Duel.SpecialSummon(tc,SUMMON_TYPE_FUSION,tp,tp,false,false,POS_FACEUP)
			elseif ce~=nil then
				local mat2=Duel.SelectFusionMaterial(tp,tc,mg2,nil,chkf)
				local fop=ce:GetOperation()
				fop(ce,e,tp,tc,mat2)
			end
			tc:CompleteProcedure()
		end
	elseif e:GetLabel()==2 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK+LOCATION_REMOVED,0,1,1,nil)
		if g:GetCount()>0 then
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
		if Duel.GetFlagEffect(tp,100227043)==0 then
			Duel.RegisterFlagEffect(tp,100227043,RESET_PHASE+PHASE_END,0,1)
			local e1=Effect.CreateEffect(e:GetHandler())
			e1:SetType(EFFECT_TYPE_FIELD)
			e1:SetCode(EFFECT_CHANGE_DAMAGE)
			e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
			e1:SetTargetRange(0,1)
			e1:SetCondition(s.damcon)
			e1:SetValue(s.damval)
			e1:SetReset(RESET_PHASE+PHASE_END)
			Duel.RegisterEffect(e1,tp)
		end
	end
end
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	local ph=Duel.GetCurrentPhase()
	return ph==PHASE_MAIN1 or ph==PHASE_MAIN2
end
function s.damval(e,re,val,r,rp,rc)
	if r&REASON_EFFECT==REASON_EFFECT then
		return math.ceil(val/2)
	else return val end
end
