Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Special Summoned. Negate any Spell effects that target a face-up DARK monster(s) you control, and if you do, destroy that Spell Card. During your Draw Phase, instead of conducting your normal draw: You can add 1 Level 4 DARK monster from your Deck to your hand. This card must be face-up on the field to activate and to resolve this effect.
--ダーク・ジェネラル フリード
--Dark General Freed
local s,id=GetID()
function s.initial_effect(c)
	--cannot special summon
	local e1=Effect.CreateEffect(c)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	c:RegisterEffect(e1)
	--disable
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_DISABLE)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTargetRange(LOCATION_SZONE,LOCATION_SZONE)
	e2:SetTarget(s.distg)
	c:RegisterEffect(e2)
	--disable effect
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e3:SetCode(EVENT_CHAIN_SOLVING)
	e3:SetRange(LOCATION_MZONE)
	e3:SetOperation(s.disop)
	c:RegisterEffect(e3)
	--self destroy
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD)
	e4:SetCode(EFFECT_SELF_DESTROY)
	e4:SetRange(LOCATION_MZONE)
	e4:SetTargetRange(LOCATION_SZONE,LOCATION_SZONE)
	e4:SetTarget(s.distg)
	c:RegisterEffect(e4)
	--search
	local e5=Effect.CreateEffect(c)
	e5:SetDescription(aux.Stringid(id,1))
	e5:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e5:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e5:SetCode(EVENT_PREDRAW)
	e5:SetRange(LOCATION_MZONE)
	e5:SetCondition(s.condition)
	e5:SetTarget(s.target)
	e5:SetOperation(s.operation)
	c:RegisterEffect(e5)
end
function s.distg(e,c)
	if c:GetCardTargetCount()==0 or not c:IsSpell() then return false end
	return c:GetCardTarget():IsExists(s.disfilter,1,nil,e:GetHandlerPlayer())
end
function s.disfilter(c,tp)
	return c:IsControler(tp) and c:IsFaceup() and c:IsLocation(LOCATION_MZONE) and c:IsAttribute(ATTRIBUTE_DARK)
end
function s.disop(e,tp,eg,ep,ev,re,r,rp)
	if not re:IsSpellEffect() then return end
	if not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then return end
	local g=Duel.GetChainInfo(ev,CHAININFO_TARGET_CARDS)
	if not g or #g==0 then return end
	if g:IsExists(s.disfilter,1,nil,tp) then
		if Duel.NegateEffect(ev) and re:GetHandler():IsRelateToEffect(re) then
			Duel.Destroy(re:GetHandler(),REASON_EFFECT)
		end
	end
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return tp==Duel.GetTurnPlayer() and Duel.GetFieldGroupCount(tp,LOCATION_DECK,0)>0
		and Duel.GetDrawCount(tp)>0
end
function s.filter(c)
	return c:GetLevel()==4 and c:IsAttribute(ATTRIBUTE_DARK) and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil) end
	local dt=Duel.GetDrawCount(tp)
	if dt~=0 then
		_replace_count=0
		_replace_max=dt
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD)
		e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
		e1:SetCode(EFFECT_DRAW_COUNT)
		e1:SetTargetRange(1,0)
		e1:SetReset(RESET_PHASE|PHASE_DRAW)
		e1:SetValue(0)
		Duel.RegisterEffect(e1,tp)
	end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,0,LOCATION_DECK)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	_replace_count=_replace_count+1
	if _replace_count>_replace_max or not e:GetHandler():IsRelateToEffect(e) or e:GetHandler():IsFacedown() then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil)
	if #g~=0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end