defmodule Pleroma.Activity do
  use Ecto.Schema
  alias Pleroma.{Repo, Activity, Notification, Object}
  import Ecto.{Query, Changeset}

  schema "activities" do
    field(:data, :map)
    field(:local, :boolean, default: true)
    field(:actor, :string)
    field(:recipients, {:array, :string})
    has_many(:notifications, Notification, on_delete: :delete_all)

    timestamps()
  end

  def get_by_ap_id(ap_id) do
    Repo.one(
      from(
        activity in Activity,
        where: fragment("(?)->>'id' = ?", activity.data, ^to_string(ap_id))
      )
    )
  end

  def change(struct, params \\ %{}) do
    struct
    |> cast(params, [:data])
    |> validate_required([:data])
    |> unique_constraint(:ap_id, name: :activities_unique_apid_index)
  end

  # TODO:
  # Go through these and fix them everywhere.
  # Wrong name, only returns create activities
  def all_by_object_ap_id_q(ap_id) do
    from(
      activity in Activity,
      where:
        fragment(
          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
          activity.data,
          activity.data,
          ^to_string(ap_id)
        ),
      where: fragment("(?)->>'type' = 'Create'", activity.data)
    )
  end

  # Wrong name, returns all.
  def all_non_create_by_object_ap_id_q(ap_id) do
    from(
      activity in Activity,
      where:
        fragment(
          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
          activity.data,
          activity.data,
          ^to_string(ap_id)
        )
    )
  end

  # Wrong name plz fix thx
  def all_by_object_ap_id(ap_id) do
    Repo.all(all_by_object_ap_id_q(ap_id))
  end

  def create_activity_by_object_id_query(ap_ids) do
    from(
      activity in Activity,
      where:
        fragment(
          "coalesce((?)->'object'->>'id', (?)->>'object') = ANY(?)",
          activity.data,
          activity.data,
          ^ap_ids
        ),
      where: fragment("(?)->>'type' = 'Create'", activity.data)
    )
  end

  def get_create_activity_by_object_ap_id(ap_id) when is_binary(ap_id) do
    create_activity_by_object_id_query([ap_id])
    |> Repo.one()
  end

  def get_create_activity_by_object_ap_id(_), do: nil

  def normalize(obj) when is_map(obj), do: normalize(obj["id"])
  def normalize(ap_id) when is_binary(ap_id), do: get_by_ap_id(ap_id)
  def normalize(_), do: nil

  defp get_in_reply_to_activity_from_object(%Object{data: %{"inReplyTo" => ap_id}}) do
    get_create_activity_by_object_ap_id(ap_id)
  end

  defp get_in_reply_to_activity_from_object(_), do: nil

  def get_in_reply_to_activity(%Activity{data: %{"object" => object}}) do
    get_in_reply_to_activity_from_object(Object.normalize(object))
  end
end