(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
 *)

module AO = AutOutput
module MA = MetaAut
module MO = MetaOutput

let main =
   let version_string = "Helena Checker 0.8.0 M - November 2008" in
   let summary = ref 0 in
   let stage = ref 1 in
   let meta_file = ref None in
   let set_summary i = summary := i in
   let print_version () = print_endline version_string; exit 0 in
   let set_stage i = stage := i in
   let close = function
      | None          -> ()
      | Some (och, _) -> close_out och
   in
   let set_meta_file name =
      close !meta_file;
      let och = open_out name in
      let frm = Format.formatter_of_out_channel och in
      Format.pp_set_margin frm max_int;
      meta_file := Some (och, frm)
   in
   let read_file name =
      if !summary > 0 then Time.gmtime version_string;      
      if !summary > 1 then
         Printf.printf "Processing file: %s\n" name; flush stdout;
      if !summary > 0 then Time.utime_stamp "started";
      let ich = open_in name in
      let lexbuf = Lexing.from_channel ich in
      let book = AutParser.book AutLexer.token lexbuf in
      close_in ich;
      if !summary > 0 then Time.utime_stamp "parsed";
      let rec aux ac mc st = function
         | []         -> ac, mc, st
	 | item :: tl -> 
            let ac = if !summary > 2 then AO.count_item Cps.id ac item else ac in
	    let f st item = 
	       let mc = if !summary > 2 then MO.count_item Cps.id mc item else mc in
	       begin match !meta_file with
	          | None          -> ()
		  | Some (_, frm) -> MO.pp_item Cps.id frm item
	       end;
	       st, mc
	    in
	    let st, mc = if !stage > 0 then MA.meta_of_aut f st item else st, mc in
	    aux ac mc st tl
      in 
      let ac, mc, _st = 
         aux AO.initial_counters MO.initial_counters MA.initial_status book
      in
      if !summary > 0 then Time.utime_stamp "processed";
      if !summary > 2 then AO.print_counters Cps.id ac;
      if !summary > 2 && !stage > 0 then MO.print_counters Cps.id mc;
   in
   let help = "Usage: helena [ -V | -Ss <number> | -m <file> ] <file> ..." in
   let help_S = "<number>  Set summary level" in
   let help_V = " Show version information" in   
   let help_m = "<file>  output intermediate representation" in
   let help_s = "<number>  Set translation stage" in
   Arg.parse [
      ("-S", Arg.Int set_summary, help_S);
      ("-V", Arg.Unit print_version, help_V);
      ("-m", Arg.String set_meta_file, help_m); 
      ("-s", Arg.Int set_stage, help_s);
   ] read_file help;
   if !summary > 0 then Time.utime_stamp "at exit"