Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 monsters with different names If this card is Link Summoned during your turn: You can discard 1 card; if this card was co-linked when this effect was activated, you can draw 1 card, also, during your Main Phase this turn, you can Normal Summon 1 monster from your hand to your zone this card points to, in addition to your Normal Summon/Set. You can only apply this effect of "Knightmare Goblin" once per turn. Neither player can target co-linked monsters you control with card effects.
--トロイメア・ゴブリン
--Knightmare Goblin
local s,id=GetID()
function s.initial_effect(c)
	--link summon
	Link.AddProcedure(c,nil,2,2,s.lcheck)
	c:EnableReviveLimit()
	--extra summon
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCondition(s.sumcon)
	e1:SetCost(s.sumcost)
	e1:SetTarget(s.sumtg)
	e1:SetOperation(s.sumop)
	c:RegisterEffect(e1)
	--cannot target
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetCode(EFFECT_CANNOT_BE_EFFECT_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.tgtg)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
function s.lcheck(g,lc,sumtype,tp)
	return g:CheckDifferentProperty(Card.GetCode,lc,sumtype,tp)
end
function s.sumcon(e,tp,eg,ep,ev,re,r,rp)
	local tp=e:GetHandlerPlayer()
	return Duel.IsTurnPlayer(tp) and e:GetHandler():IsLinkSummoned() and Duel.IsPlayerCanAdditionalSummon(tp)
end
function s.sumcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetFlagEffect(tp,id)==0 and  Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.sumtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanSummon(tp) end
	if e:GetHandler():GetMutualLinkedGroupCount()>0 then
		e:SetLabel(1)
	else
		e:SetLabel(0)
	end
	local cat=0
	if e:GetLabel()==1 then cat=cat+CATEGORY_DRAW end
	e:SetCategory(cat)
end
function s.sumop(e,tp,eg,ep,ev,re,r,rp)
	if e:GetLabel()==1 and Duel.IsPlayerCanDraw(tp,1)
		and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
		Duel.Draw(tp,1,REASON_EFFECT)
	end
	if Duel.GetFlagEffect(tp,id)~=0 then return end
	local c=e:GetHandler()
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,2))
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetTargetRange(LOCATION_HAND,0)
	e1:SetCode(EFFECT_EXTRA_SUMMON_COUNT)
	e1:SetLabelObject(c)
	e1:SetCondition(s.sumcon2)
	e1:SetValue(s.sumval)
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
	Duel.RegisterFlagEffect(tp,id,RESET_PHASE|PHASE_END,0,1)
end
function s.sumcon2(e,tp,eg,ep,ev,re,r,rp)
	return e:GetLabelObject():IsLocation(LOCATION_MZONE)
end
function s.sumval(e,c)
	local c=e:GetLabelObject()
	local sumzone=c:GetLinkedZone()
	local relzone=0x7f007f&~(1<<c:GetSequence())
	return 0,sumzone,relzone
end
function s.tgtg(e,c)
	return c:GetMutualLinkedGroupCount()>0
end