defmodule ExInsights.Client.HttpClient do
  @moduledoc """
  Responsible for actually sending track requests (HTTP POSTs) to azure app insights. Intended for internal use only.
  """

  @behaviour ExInsights.Client.ClientBehaviour

  @service_url "https://dc.services.visualstudio.com/v2/track"

  @doc """
  POSTs track requests to azure app insights. Internal use only.
  """
  @impl true
  @spec track([ExInsights.Envelope.t()]) :: {:error, map} | {:ok, map}
  def track(items) when is_list(items) do
    payload = Jason.encode_to_iodata!(items, iodata: true)
    HTTPoison.post(@service_url, payload, %{"Content-Type" => "application/json"})
  end
end