defmodule OpenTelemetry.UpdownCounter do
  @moduledoc """

      require OpenTelemetry.UpdownCounter

      OpenTelemetry.UpdownCounter.new("some.counter")

      OpenTelemetry.UpdownCounter.add("some.counter", -3)
  """

  defmacro new(name, opts \\ %{}) do
    quote do
      :otel_updown_counter.new(:opentelemetry.get_meter(__MODULE__), unquote(name), unquote(opts))
    end
  end

  defmacro add(name, number, label_set) do
    quote do
      :otel_meter.record(
        :opentelemetry.get_meter(__MODULE__),
        unquote(name),
        unquote(number),
        unquote(label_set)
      )
    end
  end

  defmacro add(bound_instrument, number) do
    quote do
      :otel_meter.record(
        :opentelemetry.get_meter(__MODULE__),
        unquote(bound_instrument),
        unquote(number)
      )
    end
  end

  defdelegate definition(name, opts), to: :otel_updown_counter
  defdelegate measurement(name_or_instrument, number), to: :otel_updown_counter
end