defmodule ApiWeb.AttachmentController do
  use ApiWeb, :controller
  require Logger
  import Ecto.Query
  alias Api.Repo

  def index(conn, params) do
    decode = """
    SELECT convert_from(decrypt(decode('#{params["idstudyattachment"]}', 'hex')::bytea, '1nf0rm3'::bytea, 'aes'), 'UTF8');
    """
    idstudyattachment = Repo.query!(decode).rows |> hd() |> hd()
    idstudyattachment = String.to_integer(idstudyattachment)

    [attachment | _] = get_attachment(idstudyattachment)
    Logger.info("Adjunto: #{inspect(attachment)}")

    file_path = attachment[:path]
    if File.exists?(file_path) do
      conn
      |> put_resp_content_type("application/#{attachment[:format]}")
      |> put_resp_header("content-disposition", "inline; filename=#{attachment[:fullname]}")
      |> send_file(200, file_path)
    else
      conn
      |> send_resp(404, "File not found")
    end
  end

  def get_attachment(idstudyattachment) do
    query =
      from sa in "studyattachments",
        where: sa.idstudyattachment == ^idstudyattachment,
        select: %{
          attachment: sa.attachment,
          path: sa.path,
          s3_path: sa.s3_path,
          format: sa.format,
          fullname: fragment("concat(name, '.', format)")
        }
    Repo.all(query)
  end
end