(* 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 Printf

let pp_tactical = TacticAst2Box.tacticalPp

let mode =
  try
    match Sys.argv.(1) with
    | "term" -> prerr_endline "Term"; `Term
    | "statement" -> prerr_endline "Statement"; `Statement
(*     | "script" -> prerr_endline "Script"; `Script *)
    | _ ->
        prerr_endline "What???????";
        exit 1
  with Invalid_argument _ -> prerr_endline "Term"; `Term

let _ =
(*
  if mode = `Script then
    let ic = open_in Sys.argv.(2) in
    let istream = Stream.of_channel ic in
    let (loc, script) = CicTextualParser2.parse_script istream in
    List.iter
      (function
        | DisambiguateTypes.Command cmd -> print_endline (pp_tactical cmd)
        | DisambiguateTypes.Comment (loc, s) -> print_endline s)
      script
  else
*)
    let ic = stdin in
    try
      while true do
        let line = input_line ic in
        let istream = Stream.of_string line in
        try
          (match mode with
          | `Term ->
              let term = CicTextualParser2.parse_term istream in
              print_endline (BoxPp.pp_term term)
          | `Statement ->
              (match CicTextualParser2.parse_statement istream with
              | TacticAst.Command (_, cmd) ->
                  print_endline (TacticAstPp.pp_command cmd)
              | TacticAst.Tactical (_, tac) ->
                  print_endline (TacticAstPp.pp_tactical tac))
(*
          | `Tactical ->
              let tac = CicTextualParser2.parse_tactical istream in
              print_endline (pp_tactical tac)
*)
          | `Alias ->
              let env = CicTextualParser2.EnvironmentP3.of_string line in
              print_endline (CicTextualParser2.EnvironmentP3.to_string env)
          | _ -> assert false);
          flush stdout
        with
        | CicTextualParser2.Parse_error (floc, msg) ->
            let (x, y) = CicAst.loc_of_floc floc in
            let before = String.sub line 0 x in
            let error = String.sub line x (y - x) in
            let after = String.sub line y (String.length line - y) in
            eprintf "%s%s%s\n" before error after;
            prerr_endline (sprintf "at character %d-%d: %s" x y msg)
      done
    with End_of_file ->
      close_in ic