defmodule ArcadiaCloud.Sync.InvoiceRollupWorker do
  @moduledoc """
  Monthly invoice rollup — runs on the 1st, invoices the month just
  ended. Idempotent (Invoicing.roll_up_month skips tenants already
  invoiced for the period).
  """

  use Oban.Worker, queue: :cloud_billing, max_attempts: 3

  require Logger

  alias ArcadiaCloud.Invoicing

  @impl Oban.Worker
  def perform(_job) do
    results = Invoicing.roll_up_month()
    rolled = Enum.count(results, &(elem(&1, 0) == :rolled))
    skipped = Enum.count(results, &(elem(&1, 0) == :skipped))
    Logger.info("[invoice rollup] rolled=#{rolled} skipped=#{skipped}")
    :ok
  end
end