defmodule Pulsar.CCConsumer do
  @doc """
  """

  alias Pulsar.Connection

  # Dummy callback module for consumers
  defmodule EchoConsumer do
    @doc """
    A dummy consumer that prints the consumed messages to standard output.

    All messages are acknowledged after being printed out.
    """
    def handle_message(_message), do: :ok

    def handle_messages(_messages), do: :ok
  end

  #use Connection

  defstruct topic: "",
    type: :Exclusive,
    name: "",
    consumer_id: 0,
    callback: nil

  @type t :: %__MODULE__{
    topic: String.t(),
    type: String.t(),
    name: String.t(),
    consumer_id: integer(),
    callback: atom()
  }
  
  def start_link(conn, callback, topic, type, name) do
    args = [
      conn,
      callback,
      topic,
      type,
      name
    ]

    # TO-DO: handle redirects
    # TO-DO: handle errors
    {:ok, broker} = Connection.lookup_topic(conn, topic)

    consumer_id = System.unique_integer([:monotonic, :positive])

    consumer = %__MODULE__{
      topic: topic,
      type: type,
      name: name,
      consumer_id: consumer_id,
      callback: callback
    }
    
    Connection.start_link(
      name,
      broker,
      callback: __MODULE__,
      callback_data: consumer
    )
  end

  # callback functions

  def authenticated() do
  end
  
  def subscribed() do
  end

  def flow() do
  end

  def active() do
  end

  
end