(* Copyright (C) 2004, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

type term = CicAst.term
type tactic = (term, string) TacticAst.tactic
type tactical = (term, string) TacticAst.tactical

type domain_item =
 | Id of string               (* literal *)
 | Symbol of string * int     (* literal, instance num *)
 | Num of int                 (* instance num *)

module OrderedDomain =
  struct
    type t = domain_item
    let compare = Pervasives.compare
  end

(* module Domain = Set.Make (OrderedDomain) *)
module Environment = Map.Make (OrderedDomain)

type codomain_item =
  string *  (* description *)
  (environment -> string -> Cic.term list -> Cic.term)
    (* environment, literal number, arguments as needed *)

and environment = codomain_item Environment.t

module type Callbacks =
  sig
    val interactive_user_uri_choice :
      selection_mode:[`SINGLE | `MULTIPLE] ->
      ?ok:string ->
      ?enable_button_for_non_vars:bool ->
      title:string -> msg:string -> id:string -> string list -> string list
    val interactive_interpretation_choice :
      (string * string) list list -> int list
    val input_or_locate_uri : title:string -> ?id:string -> unit -> UriManager.uri
  end

let string_of_domain_item = function
  | Id s -> Printf.sprintf "ID(%s)" s
  | Symbol (s, i) -> Printf.sprintf "SYMBOL(%s,%d)" s i
  | Num i -> Printf.sprintf "NUM(instance %d)" i

let string_of_domain dom =
  String.concat "; " (List.map string_of_domain_item dom)
(*
let string_of_domain dom =
  let buf = Buffer.create 1024 in
  Domain.iter
    (fun item -> Buffer.add_string buf (string_of_domain_item item ^ "; "))
    dom;
  Buffer.contents buf
*)