defmodule AI.Env do
  @moduledoc """
  Loads dotenv files into the process environment.
  """

  @doc """
  Loads `.env` and `.env.local` unless already set in the OS env.
  """
  def load do
    if Code.ensure_loaded?(Dotenvy) do
      vars =
        Dotenvy.source!(
          [
            System.get_env("DOTENV_PATH") || ".env",
            ".env.local"
          ],
          ignore_missing: true
        )

      Enum.each(vars, fn {key, value} ->
        if is_nil(System.get_env(key)) do
          System.put_env(key, value)
        end
      end)
    end

    :ok
  end
end