Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
4 Level 4 monsters Once per turn, during your opponent's End Phase, if your opponent has more cards in their hand than you do: They discard 1 card. If this card has "Battlecruiser Dianthus" as an Xyz Material, it gains this effect. ● You can detach 1 Xyz Material from this card; inflict 300 damage to your opponent for each card on the field. You can only use this effect of "CXyz Battleship Cherry Blossom" once per turn.
--CX 激烈華戦艦タオヤメ
--CXyz Battleship Cherry Blossom
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,nil,4,4)
	c:EnableReviveLimit()
	--discard
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_HANDES)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.dccon)
	e1:SetTarget(s.dctg)
	e1:SetOperation(s.dcop)
	c:RegisterEffect(e1)
	--damage
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DAMAGE)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.damcon)
	e2:SetCost(Cost.DetachFromSelf(1))
	e2:SetTarget(s.damtg)
	e2:SetOperation(s.damop)
	c:RegisterEffect(e2)
end
s.listed_names={40424929}
function s.dccon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(1-tp) and Duel.GetFieldGroupCount(tp,0,LOCATION_HAND)>Duel.GetFieldGroupCount(tp,LOCATION_HAND,0)
end
function s.dctg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetTargetPlayer(1-tp)
	Duel.SetTargetParam(1)
	Duel.SetOperationInfo(0,CATEGORY_HANDES,nil,0,1-tp,1)
end
function s.dcop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.DiscardHand(1-tp,nil,1,1,REASON_EFFECT|REASON_DISCARD)
end
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetOverlayGroup():IsExists(Card.IsCode,1,nil,40424929)
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local ct=Duel.GetFieldGroupCount(tp,LOCATION_ONFIELD,LOCATION_ONFIELD)
	Duel.SetTargetPlayer(1-tp)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,ct*300)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local p=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER)
	local ct=Duel.GetFieldGroupCount(p,LOCATION_ONFIELD,LOCATION_ONFIELD)
	Duel.Damage(p,ct*300,REASON_EFFECT)
end