Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 LIGHT monsters Once per turn: You can detach 1 material from this card; send your entire hand to the GY (min. 1), and if you do, draw 2 cards. When this card you controlled while face-up leaves the field because of an opponent's card effect: You can target Level 4 Beast-Warrior "Bujin" monsters in your GY, up to the number of Xyz Materials this card had on the field; Special Summon those targets. You can only control 1 "Bujintei Tsukuyomi".
--武神帝－ツクヨミ
--Bujintei Tsukuyomi
local s,id=GetID()
function s.initial_effect(c)
	c:SetUniqueOnField(1,0,id)
	--xyz summon
	Xyz.AddProcedure(c,aux.FilterBoolFunctionEx(Card.IsAttribute,ATTRIBUTE_LIGHT),4,2)
	c:EnableReviveLimit()
	--draw
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOGRAVE+CATEGORY_DRAW)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(Cost.DetachFromSelf(1))
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_LEAVE_FIELD)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_BUJIN}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDraw(tp,2) and Duel.GetFieldGroupCount(tp,LOCATION_HAND,0)>0 end
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,2)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,0,LOCATION_HAND)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetFieldGroup(tp,LOCATION_HAND,0)
	if #g>0 and Duel.SendtoGrave(g,REASON_EFFECT)>0 and g:FilterCount(Card.IsLocation,nil,LOCATION_GRAVE)>0 then
		Duel.Draw(tp,2,REASON_EFFECT)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local ct=e:GetHandler():GetOverlayCount()
	e:SetLabel(ct)
	return rp~=tp and (r&REASON_EFFECT)~=0 and ct>0
		and e:GetHandler():IsPreviousPosition(POS_FACEUP) and e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD)
end
function s.spfilter(c,e,tp)
	return c:GetLevel()==4 and c:IsSetCard(SET_BUJIN) and c:IsRace(RACE_BEASTWARRIOR) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	local ct=e:GetLabel()
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	if ct>ft then ct=ft end
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then ct=1 end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,ct,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,#g,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	if ft<=0 then return end
	if Duel.IsPlayerAffectedByEffect(tp,CARD_BLUEEYES_SPIRIT) then ft=1 end
	if ft<#g then return end
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end