(***********************************************************************)
(*    Grew - a Graph Rewriting tool dedicated to NLP applications      *)
(*                                                                     *)
(*    Copyright 2011-2013 Inria, Université de Lorraine                *)
(*                                                                     *)
(*    Webpage: http://grew.fr                                          *)
(*    License: CeCILL (see LICENSE folder or "http://www.cecill.info") *)
(*    Authors: see AUTHORS file                                        *)
(***********************************************************************)

open Printf
open Log
open Conll

open Libgrew

open Grew_utils
open Grew_args

(* -------------------------------------------------------------------------------- *)

let fail msg =
  Log.fmessage "-------------------------------------";
  Log.fmessage "%s" msg;
  Log.fmessage "-------------------------------------";
  exit 2

let handle fct () =
  try fct ()
  with
    | Conll_error json ->            fail (Yojson.Basic.pretty_to_string json)
    | Libgrew.Error msg ->           fail msg
    | Corpus.File_not_found file ->  fail (sprintf "File not found: \"%s\"" file)
    | Corpus.Fail msg ->             fail msg
    | Sys_error msg ->               fail (sprintf "System error: %s" msg)
    | Libgrew.Bug msg ->             fail (sprintf "Libgrew.bug, please report: %s" msg)
    | exc ->                         fail (sprintf "Uncaught exception, please report: %s" (Printexc.to_string exc))


(* -------------------------------------------------------------------------------- *)
let transform () =
  handle (fun () ->
    let grs = match !Grew_args.grs with
    | None -> Grs.empty
    | Some file -> Grs.load file in

    let domain = Grs.domain grs in

    let graph_array = Corpus.input ?domain () in
    let len = Array.length graph_array in

    let out_ch = match !Grew_args.output_file with
      | Some output_file -> open_out output_file
      | None -> stdout in

    let out_graph ?new_sent_id graph = match (!Grew_args.output, new_sent_id) with
    | (Grew_args.Conll,None) -> fprintf out_ch "%s\n" (Graph.to_conll_string graph)
    | (Grew_args.Conll,Some nsi) -> fprintf out_ch "%s\n" (graph |> Graph.to_conll |> Conll.set_sentid nsi |> Conll.to_string)
    | (Grew_args.Cupt, None) -> fprintf out_ch "%s\n" (Graph.to_conll_string ~cupt:true graph)
    | (Grew_args.Cupt,Some nsi) -> fprintf out_ch "%s\n" (graph |> Graph.to_conll |> Conll.set_sentid nsi |> Conll.to_string ~cupt:true)
    | (Grew_args.Gr, None) -> fprintf out_ch "%s\n" (Graph.to_gr graph)
    | (Grew_args.Gr, Some nsi) -> fprintf out_ch "# sent_id = %s\n%s\n" nsi (Graph.to_gr graph)
    | (Grew_args.Dot, None) -> fprintf out_ch "%s\n" (Graph.to_dot graph)
    | (Grew_args.Dot, Some nsi) -> fprintf out_ch "# sent_id = %s\n%s\n" nsi (Graph.to_dot graph) in

    Array.iteri
      (fun index (id, gr) ->
        Counter.print index len id;
        match Rewrite.simple_rewrite ~gr ~grs ~strat:!Grew_args.strat with
        | [one] -> out_graph one
        | l ->
          List.iteri (fun i gr ->
            let conll = Graph.to_conll gr in
            let conll_new_id = Conll.set_sentid (sprintf "%s_%d" id i) conll in
            fprintf out_ch "%s\n" (Conll.to_string conll_new_id)
          ) l
      ) graph_array;
    Counter.finish ();
    match !Grew_args.output_file with
      | Some output_file -> close_out out_ch
      | None -> ()
  ) ()

(* -------------------------------------------------------------------------------- *)
  let grep () = handle
    (fun () ->
      match !Grew_args.pattern with
      | None -> Log.message "No pattern file specified: use -pattern option"; exit 1;
      | Some pattern_file ->

      let domain = match !Grew_args.grs with
      | None -> None
      | Some file -> Grs.domain (Grs.load file) in

      let pattern = Pattern.load ?domain pattern_file in

      (* get the array of graphs to explore *)
      let graph_array = Corpus.input ?domain () in

      (match !Grew_args.dep_dir with
      | None -> ()
      | Some d -> ignore (Sys.command (sprintf "mkdir -p %s" d)));

      (* printf "%s\n" (String.concat "_" (Pattern.pid_name_list pattern)); *)
      let pattern_ids = Pattern.pid_name_list pattern in

      let final_json =
        Array.fold_left
          (fun acc (name,graph) ->
            let matchings = Graph.search_pattern ?domain pattern graph in
              List.fold_left
                (fun acc2 matching ->
                  let assoc_nodes = Matching.nodes pattern graph matching in
                  let graph_node_names = List.map snd assoc_nodes in
                  let deco = Deco.build pattern matching in

                  (* write the dep file if needed *)
                  let dep_file =
                    match !Grew_args.dep_dir with
                    | None -> None
                    | Some dir ->
                      let id = sprintf "%s__%s"
                        name
                        (String.concat "_" (List.map2 (sprintf "%s:%s") pattern_ids graph_node_names)) in
                      let dep = Graph.to_dep ~deco graph in
                      let filename = Filename.concat dir (sprintf "%s.dep" id) in
                      let out_ch = open_out filename in
                      fprintf out_ch "%s" dep;
                      close_out out_ch;
                    Some filename in

                  let json_matching = Matching.to_json pattern graph matching in

                  let opt_list = [
                    Some ("sent_id", `String name);
                    Some ("matching", json_matching);
                    (
                      if !Grew_args.html
                      then Some ("html", `String (Graph.to_sentence ~deco graph))
                      else None
                    );
                    (
                      match dep_file with
                      | None -> None
                      | Some f -> Some ("dep_file", `String f)
                    )
                  ] in
                    let json = `Assoc (CCList.filter_map (fun x -> x) opt_list) in
                    json :: acc2
                ) acc matchings
          ) [] graph_array in
      Printf.printf "%s\n" (Yojson.Basic.pretty_to_string (`List final_json))
    ) ()