Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is sent to the GY to activate a monster effect: You can add this card to your hand. If a monster(s) is sent to your GY, except by battle, while this card is in your GY (except during the Damage Step): You can discard 1 card to the GY; Special Summon this card. You can only use 1 "Butterfly Fish" effect per turn, and only once that turn. You cannot Special Summon from the Extra Deck, except WATER monsters, the turn you activate either of this card's effects.
--バタフライ・フィッシュ
--Butterfly Fish
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Add this card to your hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_TO_GRAVE)
	e1:SetCountLimit(1,id)
	e1:SetCondition(function(e,tp,eg,ep,ev,re,r,rp) return e:GetHandler():IsReason(REASON_COST) and re:IsActivated() and re:IsMonsterEffect() end)
	e1:SetCost(s.thcost)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	--Special Summon this card
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY,EFFECT_FLAG2_CHECK_SIMULTANEOUS)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.spcon)
	e2:SetCost(s.spcost)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	Duel.AddCustomActivityCounter(id,ACTIVITY_SPSUMMON,function(c) return not c:IsSummonLocation(LOCATION_EXTRA) or c:IsAttribute(ATTRIBUTE_WATER) end)
end
function s.thcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetCustomActivityCount(id,tp,ACTIVITY_SPSUMMON)==0 end
	--You cannot Special Summon from the Extra Deck, except WATER monsters, the turn you activate this effect
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetDescription(aux.Stringid(id,2))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET+EFFECT_FLAG_OATH+EFFECT_FLAG_CLIENT_HINT)
	e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e1:SetTargetRange(1,0)
	e1:SetTarget(function(e,c) return c:IsLocation(LOCATION_EXTRA) and not c:IsAttribute(ATTRIBUTE_WATER) end)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsAbleToHand() end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,c,1,tp,0)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SendtoHand(c,nil,REASON_EFFECT)
	end
end
function s.spconfilter(c,tp)
	return c:IsMonster() and c:IsControler(tp) and not c:IsReason(REASON_BATTLE)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return not eg:IsContains(e:GetHandler()) and eg:IsExists(s.spconfilter,1,nil,tp)
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetCustomActivityCount(id,tp,ACTIVITY_SPSUMMON)==0
		and Duel.IsExistingMatchingCard(aux.AND(Card.IsDiscardable,Card.IsAbleToGraveAsCost),tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,aux.AND(Card.IsDiscardable,Card.IsAbleToGraveAsCost),1,1,REASON_COST|REASON_DISCARD)
	--You cannot Special Summon from the Extra Deck, except WATER monsters, the turn you activate this effect
	s.thcost(e,tp,eg,ep,ev,re,r,rp,1)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
	end
end