defmodule Mix.Tasks.Clacks.User do
  use Mix.Task
  alias Clacks.{Repo, User, Actor, Keys, ActivityPub}

  @shortdoc "Creates a new user"
  def run(["create"]) do
    username = IO.gets("Username: ") |> String.trim()
    # password = IO.gets("Password: ") |> String.trim()

    {:ok, pem} = Keys.generate_rsa_pem()
    {:ok, _private, public} = Keys.keys_from_private_key_pem(pem)
    {:ok, public_key_pem} = Keys.public_key_pem(public)

    changeset = User.changeset(%User{}, %{username: username, private_key: pem})

    # start the app so the DB connection is established
    Mix.Task.run("app.start")

    {:ok, user} = Repo.insert(changeset)

    url = Application.get_env(:clacks, ClacksWeb.Endpoint)[:url]

    uri =
      URI.to_string(%URI{
        scheme: url[:scheme],
        host: url[:host],
        port: url[:port],
        path: Path.join("/users", username)
      })

    actor =
      Ecto.build_assoc(user, :actor, %{
        ap_id: uri,
        nickname: username,
        local: true,
        data: ActivityPub.actor(uri, username, username, public_key_pem)
      })

    {:ok, actor} = Repo.insert(actor)

    IO.puts("User #{username} successfully created")
  end
end