(******************************************************************************)
(*  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 Automaton


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 filename query output =
    (* Just a trick to allow the C++ code to print debugging stuff first *)  
    let v = time (fun () -> let v = Tree.Binary.parse_xml_uri filename;
		  in Printf.eprintf "Parsing document : %!";v
		 ) () 
    in
    let _ = Tag.init (Tree.Binary.tag_pool v) in
      MM(v,__LOCATION__);
      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;
	  Format.eprintf "\n%!";
	  (*		Format.eprintf "Internal rep of the tree is :\n%!";
			Tree.Binary.dump v;			      *)
	  Printf.eprintf "Execution time : ";
	  time (fun v -> ignore (TopDown.accept auto v)) v;
	  Printf.eprintf "Number of nodes in the result set : %i\n" (BST.cardinal auto.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";
			  BST.iter (fun t -> Tree.Binary.print_xml_fast oc t;
				      output_char oc '\n') auto.result) ();
	end;
	Printf.eprintf "Total time : %fms\n Coherence : %i\n%!" (total_time())
;;
		

Options.parse_cmdline();;

main !Options.input_file !Options.query !Options.output_file;;

Printf.eprintf "\n=================================================\nDEBUGGING\n%!";
Tree.DEBUGTREE.print_stats Format.err_formatter;;
Gc.full_major()