snake_oil

defmodule SnakeOil do
  @moduledoc """
  Documentation for `SnakeOil`.
  """

  alias SnakeOil.PythonInterface

  @doc """
  Starts the application.
    returns: {:ok, pid} | {:error, reason}
  """
  def start_python_instance(working_dir, python_version \\ 'python3') do
    PythonInterface.start_link([working_dir, python_version])
  end

  @doc """
  Calls a Python function.
  """
  def call_python_function(module, function, args \\ []) do
    PythonInterface.call_function(module, function, args)
  end

  @doc """
  Calls a Python function with a timeout.
  """
  def call_python_function_with_timeout(module, function, timeout, args \\ []) do
    PythonInterface.call_with_timeout(module, function, timeout, args)
  end

  @doc """
  Stops the Python instance.
  """
  def stop_python_instance(pid) do
    PythonInterface.terminate(pid)
  end

  @doc """
  Call a python function without a genserver.
  """
  def call_python_transient(working_dir, module, function, args \\ [], python_version \\ 'python3') do
    python_directory = working_dir |> to_charlist()
    python_executable = python_version

    {:ok, pid} = :python.start([{:python_path, python_directory}, {:python, python_executable}])
    result = :python.call(pid, module, function, args)
    :python.stop(pid)
    result
  end
end