(* Copyright (C) 2005, 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 thingsToInitilaize = 
  ConfigurationFile | Db | Environment | Getter | Notation | 
  Paramodulation | Makelib
  
exception FailedToInitialize of thingsToInitilaize

let wants s l = 
  List.iter (
    fun item -> 
      if not (List.exists (fun x -> x = item) l) then
        raise (FailedToInitialize item)) 
  s

let already_configured s l =
  List.for_all (fun item -> List.exists (fun x -> x = item) l) s
  
let load_configuration init_status =
  if not (already_configured [ConfigurationFile] init_status) then
    begin
      Helm_registry.load_from BuildTimeConf.matita_conf;
      ConfigurationFile::init_status 
    end
  else
    init_status

let initialize_db init_status = 
  wants [ConfigurationFile] init_status;
  if not (already_configured [Db] init_status) then
    begin
      MetadataTypes.ownerize_tables (Helm_registry.get "matita.owner");
      MatitaDb.create_owner_environment ();
      Db::init_status
    end
  else
    init_status

let initialize_paramodulation init_status = 
  wants [] init_status;
  if not (already_configured [Paramodulation] init_status) then
    begin
      Paramodulation.Saturation.init ();
      Paramodulation::init_status
    end
  else
    init_status

let initialize_makelib init_status = 
  wants [ConfigurationFile] init_status;
  if not (already_configured [Makelib] init_status) then
    begin
      MatitamakeLib.initialize (); 
      Makelib::init_status
    end
  else
    init_status

let initialize_notation init_status = 
  wants [ConfigurationFile] init_status;
  if not (already_configured [Notation] init_status) then
    begin
      CicNotation.load_notation BuildTimeConf.core_notation_script;
      Notation::init_status
    end
  else
    init_status

let initialize_environment init_status = 
  wants [ConfigurationFile] init_status;
  if not (already_configured [Getter;Environment] init_status) then
    begin
      Http_getter.init ();
      CicEnvironment.set_trust (* environment trust *)
        (let trust = Helm_registry.get_bool "matita.environment_trust" in
         fun _ -> trust);
      Getter::Environment::init_status
    end
  else
    init_status 
  
let status = ref []
    
let initialize_all () =
  status := 
    initialize_notation 
      (initialize_environment 
        (initialize_db 
          (initialize_paramodulation 
            (initialize_makelib
              (load_configuration !status)))))

let load_config_only () =
  status := load_configuration !status

let initialize_notation () =
  status := initialize_notation (load_configuration !status)