defmodule Postgrex.Extensions.Interval do
  @moduledoc false
  import Postgrex.BinaryUtils, warn: false
  use Postgrex.BinaryExtension, send: "interval_send"

  def encode(_) do
    quote location: :keep do
      %Postgrex.Interval{months: months, days: days, secs: secs} ->
        microsecs = secs * 1_000_000
        <<16 :: int32, microsecs :: int64, days :: int32, months :: int32>>
      other ->
        raise ArgumentError, Postgrex.Utils.encode_msg(other, Postgrex.Interval)
    end
  end

  def decode(_) do
    quote location: :keep do
      <<16 :: int32, microsecs :: int64, days :: int32, months :: int32>> ->
        secs = div(microsecs, 1_000_000)
        %Postgrex.Interval{months: months, days: days, secs: secs}
    end
  end
end