defmodule NullaWeb.FollowController do
  use NullaWeb, :controller
  alias Nulla.ActivityPub
  alias Nulla.Utils
  alias Nulla.Models.User
  alias Nulla.Models.InstanceSettings

  def following(conn, %{"username" => username, "page" => page_param}) do
    instance_settings = InstanceSettings.get_instance_settings!()
    domain = instance_settings.domain
    offset = instance_settings.offset
    user = User.get_user_by_username!(username)
    total = Utils.count_following_by_username!(user.username)

    page =
      case Integer.parse(page_param) do
        {int, _} when int > 0 -> int
        _ -> 1
      end

    following_list = Utils.get_following_users_by_username!(user.username, page)

    conn
    |> put_resp_content_type("application/activity+json")
    |> json(ActivityPub.following(domain, user, total, following_list, page, offset))
  end

  def following(conn, %{"username" => username}) do
    instance_settings = InstanceSettings.get_instance_settings!()
    domain = instance_settings.domain
    user = User.get_user_by_username!(username)
    total = Utils.count_following_by_username!(user.username)

    conn
    |> put_resp_content_type("application/activity+json")
    |> json(ActivityPub.following(domain, user, total))
  end

  def followers(conn, %{"username" => username, "page" => page_param}) do
    instance_settings = InstanceSettings.get_instance_settings!()
    domain = instance_settings.domain
    offset = instance_settings.offset
    user = User.get_user_by_username!(username)
    total = Utils.count_followers_by_username!(user.username)

    page =
      case Integer.parse(page_param) do
        {int, _} when int > 0 -> int
        _ -> 1
      end

    followers_list = Utils.get_followers_by_username!(user.username, page)

    conn
    |> put_resp_content_type("application/activity+json")
    |> json(ActivityPub.followers(domain, user, total, followers_list, page, offset))
  end

  def followers(conn, %{"username" => username}) do
    instance_settings = InstanceSettings.get_instance_settings!()
    domain = instance_settings.domain
    user = User.get_user_by_username!(username)
    total = Utils.count_followers_by_username!(user.username)

    conn
    |> put_resp_content_type("application/activity+json")
    |> json(ActivityPub.followers(domain, user, total))
  end
end