defmodule NullaWeb.InboxController do
  use NullaWeb, :controller
  alias Nulla.Models.Follow
  alias Nulla.Utils

  def inbox(
        conn,
        %{"type" => "Follow", "actor" => actor_uri, "object" => target_uri} = activity
      ) do
    with {:ok, target_user} <- Utils.resolve_local_actor(target_uri),
         {:ok, remote_actor} <- Utils.fetch_remote_actor(actor_uri),
         :ok <- HTTPSignature.verify(conn, remote_actor),
         remote_user <- Follow.create_remote_user(remote_actor),
         follow <- Follow.create_follow(%{user: remote_user, target: target_user}),
         :ok <- Utils.send_accept_activity(remote_actor, target_user, follow, activity) do
      json(conn, %{"status" => "Follow accepted"})
    else
      error ->
        IO.inspect(error, label: "Follow error")
        json(conn, %{"error" => "Failed to process Follow"})
    end
  end
end