module Protocol_version = struct
  (* libtool version format *)
  (* todo *)
  let current = 0
  let revision = 0
  let age = 0
  let v = Fmt.str "%d:%d:%d"
end

module Mimetype = struct
  let mimetype_extension_assoc =
    [
      (("text", "plain"), ".txt"); (("text", "markdown"), ".md");
      (("text", "html"), ".html"); (("text", "html"), ".htm");
      (("application", "pdf"), ".pdf"); (("image", "jpeg"), ".jpg");
      (("image", "jpeg"), ".jpeg"); (("image", "png"), ".png");
      (("image", "gif"), ".gif");
    ]

  let mimetype_l, _ = List.split mimetype_extension_assoc

  let of_cohttp_media = function
    | Cohttp.Accept.MediaType (m, m_sub) ->
        List.find_opt (( = ) (m, m_sub)) mimetype_l
    | AnyMediaSubtype m ->
        List.find_opt (fun (m', _) -> String.equal m m') mimetype_l
    | AnyMedia -> Some Config.default_mimetype

  let to_extension (m, m_sub) =
    assert (m <> "*");
    assert (m_sub <> "*");
    List.assoc_opt (m, m_sub) mimetype_extension_assoc

  let of_extension ext =
    List.find_map
      (fun (mime, ext') ->
        match String.equal ext ext' with false -> None | true -> Some mime)
      mimetype_extension_assoc
end

(* -- pretty printers -- *)
let pp_mime fmt mime = Fmt.pf fmt "%s/%s" (fst mime) (snd mime)
let pp_array pp_item item = Fmt.array ~sep:(Fmt.any ", ") pp_item item