(******************************************************************************)
(*  SXSI : XPath evaluator                                                    *)
(*  Kim Nguyen (Kim.Nguyen@nicta.com.au)                                      *)
(*  Copyright NICTA 2008                                                      *)
(*  Distributed under the terms of the LGPL (see LICENCE)                     *)
(******************************************************************************)
INCLUDE "debug.ml"

open Ata


let l = ref [] ;;
let time f x =
  let t1 = Unix.gettimeofday () in
  let r = f x in
  let t2 = Unix.gettimeofday () in 
  let t = (1000. *.(t2 -. t1)) in
    l:= t::!l;
    Printf.eprintf "  %fms\n%!" t ;
    r
;;
let total_time () =  List.fold_left (+.) 0. !l;;


let main v query output =
    let _ = Tag.init (Tree.Binary.tag_pool v) in
      Printf.eprintf "Parsing query : ";    
      let query = try
	time
	  XPath.Parser.parse_string query
      with
	  Ulexer.Loc.Exc_located ((x,y),e) -> Printf.eprintf "character %i-%i %s\n" x y (Printexc.to_string e);exit 1
      in      
	Printf.eprintf "Compiling query : ";
	let auto = time XPath.Compile.compile  query in
	  XPath.Ast.print Format.err_formatter query;
	  Printf.eprintf "Execution time : ";
	  let result = time (BottomUpNew.run auto) v in
	    Printf.eprintf "Number of nodes in the result set : %i\n" (List.length result);
	    begin
 	      match output with
		| None -> ()
		| Some f ->
		    
		    Printf.eprintf "Serializing results : ";
		    time( fun () ->
			    let oc = open_out f in
			      output_string oc "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
			      List.iter (fun t -> Tree.Binary.print_xml_fast oc t;
					   output_char oc '\n') result) ();
	    end;
	    Printf.eprintf "Total time : %fms\n Coherence : %i\n%!" (total_time())
;;
		

Options.parse_cmdline();;

let v = 
  if (Filename.check_suffix !Options.input_file ".srx")
  then 
    begin
      Printf.eprintf "Loading from file : ";
      time (Tree.Binary.load  ~sample:!Options.sample_factor )
	(Filename.chop_suffix !Options.input_file ".srx");
    end
  else 
    let v = 
      time (fun () -> let v = Tree.Binary.parse_xml_uri !Options.input_file;
	    in Printf.eprintf "Parsing document : %!";v
	   ) () 
    in
      if !Options.save_file <> ""
      then begin
	Printf.eprintf "Writing file to disk : ";
	time (Tree.Binary.save v) !Options.save_file;
      end;
      v
in
  main v !Options.query !Options.output_file;;

IFDEF DEBUG
THEN
Printf.eprintf "\n=================================================\nDEBUGGING\n%!";
Format.eprintf "\nAutomaton is:\n%!";
Ata.dump Format.err_formatter auto;
Tree.DEBUGTREE.print_stats Format.err_formatter;;
Gc.full_major()
ENDIF