defmodule Podbox.Podcast.Enclosure do
  @moduledoc """
  A podcast enclosure.
  """

  alias Podbox.{
    Download.Asset,
    Podcast,
    Podcast.AssetEnclosure,
    Podcast.CreateEnclosureChange,
    Podcast.Episode,
    Repo
  }

  use Ash.Resource,
    data_layer: AshSqlite.DataLayer,
    domain: Podcast,
    notifiers: [Ash.Notifier.PubSub]

  @type t :: Ash.Resource.record()

  attributes do
    uuid_primary_key :id

    attribute :url, :string, allow_nil?: false, public?: true
    attribute :length, :integer, allow_nil?: false, public?: true, constraints: [min: 0]
    attribute :mime_type, :string, allow_nil?: false, public?: true

    create_timestamp :inserted_at
    update_timestamp :updated_at
  end

  relationships do
    belongs_to :episode, Episode, attribute_writable?: true, public?: true
    many_to_many :assets, Asset, through: AssetEnclosure, public?: true
    has_many :asset_enclosures, AssetEnclosure, public?: false
  end

  actions do
    defaults [:read, :destroy, update: :*]

    create :create do
      accept [:url, :length, :mime_type]
      primary? true

      change CreateEnclosureChange
    end
  end

  sqlite do
    repo Repo
    table "podcast_enclosures"
  end

  pub_sub do
    module Podbox.PubSub
    prefix "podcast:enclosure"
    publish :create, "created"
  end
end