Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Send 1 face-up "Umi" you control to the GY; Special Summon up to 2 monsters with different names from your hand and/or Deck, that mention "Umi" or are WATER Normal Monsters, in Defense Position, then if your opponent controls a monster, you can Special Summon any number of Level 6 or lower WATER Normal Monsters from your hand and/or Deck. Until the end of your next turn after this card resolves, you cannot Special Summon monsters, except WATER monsters. You can only activate 1 "Kairyu-Shin's Dark Reef" per turn.
--暗岩の海竜神
--Kairyu-Shin's Dark Reef
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon
	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:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	e1:SetCost(s.spcost)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
s.listed_names={CARD_UMI}
function s.spcostfilter(c,tp)
	return c:IsFaceup() and c:IsCode(CARD_UMI) and c:IsAbleToGraveAsCost()
		and Duel.GetMZoneCount(tp,c)>0
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.spcostfilter,tp,LOCATION_ONFIELD,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.spcostfilter,tp,LOCATION_ONFIELD,0,1,1,nil,tp)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.spfilter1(c,e,tp)
	return ((c:IsType(TYPE_NORMAL) and c:IsAttribute(ATTRIBUTE_WATER)) or c:ListsCode(CARD_UMI))
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.spfilter1,tp,LOCATION_HAND|LOCATION_DECK,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,0,tp,LOCATION_HAND|LOCATION_DECK)
	Duel.SetPossibleOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,0,tp,LOCATION_HAND|LOCATION_DECK)
end
function s.spfilter2(c,e,tp)
	return c:IsLevelBelow(6) and c:IsType(TYPE_NORMAL) and c:IsAttribute(ATTRIBUTE_WATER)
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	--Special Summon (up to 2 with different names)
	local g=Duel.GetMatchingGroup(s.spfilter1,tp,LOCATION_HAND|LOCATION_DECK,0,nil,e,tp)
	local ct=math.min(2,Duel.GetLocationCount(tp,LOCATION_MZONE))
	if ct>0 and Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then ct=1 end
	local sg=aux.SelectUnselectGroup(g,e,tp,1,ct,aux.dncheck,1,tp,HINTMSG_SPSUMMON)
	if #sg>0 and Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP_DEFENSE)>0
		and Duel.GetFieldGroupCount(tp,0,LOCATION_MZONE)>0 then
		--Special Summon (any number)
		local ng=Duel.GetMatchingGroup(s.spfilter2,tp,LOCATION_HAND|LOCATION_DECK,0,nil,e,tp)
		local nct=Duel.GetLocationCount(tp,LOCATION_MZONE)
		if #ng>0 and nct>0 and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
			if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then nct=1 end
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local nsg=ng:Select(tp,1,nct,nil)
			if #nsg>0 then
				Duel.BreakEffect()
				Duel.SpecialSummon(nsg,0,tp,tp,false,false,POS_FACEUP)
			end
		end
	end
	if not e:IsHasType(EFFECT_TYPE_ACTIVATE) then return end
	--Cannot Special Summon non-WATER monsters
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetDescription(aux.Stringid(id,2))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_CLIENT_HINT)
	e1:SetTargetRange(1,0)
	e1:SetTarget(function(_,c)return not c:IsAttribute(ATTRIBUTE_WATER)end)
	e1:SetReset(RESET_PHASE|PHASE_END|RESET_SELF_TURN,Duel.IsTurnPlayer(tp) and 2 or 1)
	Duel.RegisterEffect(e1,tp)
end