defmodule NullaWeb.OutboxController do
  use NullaWeb, :controller
  alias Nulla.ActivityPub
  alias Nulla.Models.Actor
  alias Nulla.Models.Note
  alias Nulla.Models.InstanceSettings

  def outbox(conn, %{"username" => username} = params) do
    case Map.get(params, "page") do
      "true" ->
        instance_settings = InstanceSettings.get_instance_settings!()
        domain = instance_settings.domain
        actor = Actor.get_actor(username, domain)
        max_id = params["max_id"] && String.to_integer(params["max_id"])

        notes =
          if max_id do
            Note.get_before_notes(actor.id, max_id)
          else
            Note.get_latest_notes(actor.id)
          end

        items = Enum.map(notes, &ActivityPub.activity_note(&1))

        next_max_id =
          case List.last(notes) do
            nil -> 0
            last -> last.id
          end

        min_id =
          case List.first(notes) do
            nil -> 0
            first -> first.id
          end

        conn
        |> put_resp_content_type("application/activity+json")
        |> send_resp(
          200,
          Jason.encode!(ActivityPub.outbox(domain, username, next_max_id, min_id || 0, items))
        )

      _ ->
        instance_settings = InstanceSettings.get_instance_settings!()
        domain = instance_settings.domain
        actor = Actor.get_actor(username, domain)
        total = Note.get_total_notes_count(actor.id)

        conn
        |> put_resp_content_type("application/activity+json")
        |> send_resp(200, Jason.encode!(ActivityPub.outbox(domain, username, total)))
    end
  end
end