defmodule NervesHubCLI do
  alias Mix.NervesHubCLI.Shell

  def home_dir do
    override_dir =
      Application.get_env(:nerves_hub_cli, :home_dir) || System.get_env("NERVES_HUB_HOME")

    if override_dir == nil or override_dir == "" do
      Path.expand("~/.nerves-hub")
    else
      override_dir
    end
  end

  def public_keys([]), do: []

  def public_keys(keys) when is_list(keys) do
    org = Mix.NervesHubCLI.Utils.org([])
    local_keys = NervesHubCLI.Key.local_keys(org)

    Enum.reduce(keys, [], &[find_key(&1, local_keys) | &2])
  end

  defp find_key(key, _local_keys) when is_binary(key), do: key

  defp find_key(key_name, local_keys) when is_atom(key_name) do
    value =
      Enum.find_value(local_keys, fn %{name: name, key: key} ->
        to_string(key_name) == name && key
      end)

    case value do
      nil -> Shell.raise("NervesHub is unable to find key: #{inspect(key_name)}")
      value -> value
    end
  end
end