defmodule FarmbotCore.Leds do
  @moduledoc "API for controling Farmbot LEDS."
  @led_handler Application.get_env(:farmbot_core, __MODULE__)[:gpio_handler]
  @led_handler || Mix.raise("You forgot a led handler!")

  @valid_status [:off, :solid, :slow_blink, :fast_blink, :really_fast_blink]

  def red(status) when status in @valid_status, do: led_handler().red(status)
  def blue(status) when status in @valid_status, do: led_handler().blue(status)
  def green(status) when status in @valid_status, do: led_handler().green(status)
  def yellow(status) when status in @valid_status, do: led_handler().yellow(status)
  def white1(status) when status in @valid_status, do: led_handler().white1(status)
  def white2(status) when status in @valid_status, do: led_handler().white2(status)
  def white3(status) when status in @valid_status, do: led_handler().white3(status)
  def white4(status) when status in @valid_status, do: led_handler().white4(status)
  def white5(status) when status in @valid_status, do: led_handler().white5(status)

  def factory_test(status) do
    red(:off)
    blue(:off)
    green(:off)
    yellow(:off)
    white1(:off)
    white2(:off)
    white3(:off)
    white4(:off)
    white5(:off)

    red(status)
    blue(status)
    green(status)
    yellow(status)
    white1(status)
    white2(status)
    white3(status)
    white4(status)
    white5(status)
  end

  defp led_handler,
    do: Application.get_env(:farmbot_core, __MODULE__)[:gpio_handler]

  def child_spec(opts) do
    %{
      id: __MODULE__,
      start: {led_handler(), :start_link, [opts]},
      type: :worker,
      restart: :permanent,
      shutdown: 500
    }
  end
end