(* 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/
 *)

open MatitaGtkMisc

(** {2 Internal status} *)

  (* TODO Zack: may be current_proofs if we want an MDI interface *)
let (get_proof, set_proof, has_proof) =
  let (current_proof: MatitaTypes.proof option ref) = ref None in
  ((fun () ->
    match !current_proof with
    | Some proof -> proof
    | None -> assert false),
   (fun proof -> current_proof := Some proof),
   (fun () -> !current_proof <> None))

(** {2 Settings} *)

let debug_print = MatitaTypes.debug_print

(** {2 Initialization} *)

let _ = Helm_registry.load_from "matita.conf.xml"
let _ = GMain.Main.init ()
let gui = new MatitaGui.gui (Helm_registry.get "matita.glade_file")
let parserr = new MatitaDisambiguator.parserr ()
let mqiconn = MQIConn.init ()
let disambiguator =
  new MatitaDisambiguator.disambiguator ~parserr ~mqiconn
    ~chooseUris:(interactive_user_uri_choice ~gui)
    ~chooseInterp:(interactive_interp_choice ~gui)
    ()

  (** quit program, possibly asking for confirmation *)
let quit () = GMain.Main.quit ()

let _ =
  gui#setQuitCallback quit;
  gui#main#debugMenu#misc#hide ();
  ignore (gui#main#newProofMenuItem#connect#activate (fun _ ->
   if has_proof () &&
      not (ask_confirmation ~gui
              ~msg:("Starting a new proof will abort current one,\n" ^
                "are you sure you want to continue?")
              ())
    then
      ()  (* abort new proof process *)
    else
      let input = ask_text ~gui ~msg:"Insert proof goal" ~multiline:true () in
      let (env, metasenv, term) =
        disambiguator#disambiguateTerm (Stream.of_string input)
      in
      let proof = MatitaProof.proof ~typ:term ~metasenv () in
(*       proof#status#attach ... FINQUI *)
      proof#status#notify ();
      set_proof proof;
      debug_print ("new proof, goal is: " ^ CicPp.ppterm term)))

  (** <DEBUGGING> *)
let _ =
  if BuildTimeConf.debug then begin
    gui#main#debugMenu#misc#show ();
    let addDebugItem ~label callback =
      let item =
        GMenu.menu_item ~packing:gui#main#debugMenu_menu#append ~label ()
      in
      ignore (item#connect#activate callback)
    in
    addDebugItem "interactive user uri choice" (fun _ ->
      try
        let uris =
          interactive_user_uri_choice ~gui ~selection_mode:`MULTIPLE
            ~msg:"messaggio" ~nonvars_button:true
            ["cic:/uno.con"; "cic:/due.var"; "cic:/tre.con"; "cic:/quattro.con";
            "cic:/cinque.var"]
        in
        List.iter prerr_endline uris
      with MatitaGtkMisc.Cancel -> MatitaTypes.error "no choice");
    addDebugItem "toggle auto disambiguation" (fun _ ->
      Helm_registry.set_bool "matita.auto_disambiguation"
        (not (Helm_registry.get_bool "matita.auto_disambiguation")));
    addDebugItem "mono line text input" (fun _ ->
      prerr_endline (ask_text ~gui ~title:"title" ~msg:"message" ()));
    addDebugItem "multi line text input" (fun _ ->
      prerr_endline
        (ask_text ~gui ~title:"title" ~multiline:true ~msg:"message" ()));
    addDebugItem "dump proof status to stdout" (fun _ ->
      print_endline ((get_proof ())#status#toString));
  end
  (** </DEBUGGING> *)

let _ = GtkThread.main ()