defmodule Compox.Docker.API.Client do
  @moduledoc false

  use Tesla

  adapter Tesla.Adapter.Hackney, recv_timeout: 30_000

  @doc """
  Converts the given params hash and add it to the url.
  """
  def add_query_params(url, params) do
    filtered_query =
      params
      |> Enum.map(fn {p, v} -> {p, Jason.encode!(v)} end)
      |> URI.encode_query()

    "#{url}?#{filtered_query}"
  end

  @doc """
  Send a GET request to the Docker API at the speicifed resource.
  """
  def do_get(resource, headers \\ default_headers()) do
    full = base_url() <> resource

    get!(full, headers)
  end

  #
  # Private functions
  #

  @spec base_url :: String.t()
  defp base_url do
    host =
      Application.get_env(
        :docker,
        :host,
        "http+unix://%2fvar%2frun%2fdocker.sock"
      )

    version = Application.get_env(:compox, :docker_version, "v1.27")

    "#{host}/#{version}"
  end

  @spec default_headers :: map()
  defp default_headers do
    [{"Content-Type", "application/json"}]
  end
end