(*  Title:      HOL/TPTP/mash_eval.ML

    Author:     Jasmin Blanchette, TU Muenchen

    Copyright   2012

Evaluate proof suggestions from MaSh (Machine-learning for Sledgehammer).

*)

signature MASH_EVAL =

sig

  type params = Sledgehammer_Provers.params

  val MePoN : string

  val MaSh_IsarN : string

  val MaSh_ProverN : string

  val MeSh_IsarN : string

  val MeSh_ProverN : string

  val IsarN : string

  val evaluate_mash_suggestions :

    Proof.context -> params -> int * int option -> string list -> string option

    -> string -> string -> string -> string -> string -> string -> unit

end;

structure MaSh_Eval : MASH_EVAL =

struct

open Sledgehammer_Util

open Sledgehammer_Fact

open Sledgehammer_MePo

open Sledgehammer_MaSh

open Sledgehammer_Provers

open Sledgehammer_Isar

val MePoN = "MePo"

val MaSh_IsarN = "MaSh-Isar"

val MaSh_ProverN = "MaSh-Prover"

val MeSh_IsarN = "MeSh-Isar"

val MeSh_ProverN = "MeSh-Prover"

val IsarN = "Isar"

fun in_range (from, to) j =

  j >= from andalso (to = NONE orelse j <= the to)

fun evaluate_mash_suggestions ctxt params range methods prob_dir_name

        mepo_file_name mash_isar_file_name mash_prover_file_name

        mesh_isar_file_name mesh_prover_file_name report_file_name =

  let

    val report_path = report_file_name |> Path.explode

    val _ = File.write report_path ""

    fun print s = File.append report_path (s ^ "\n")

    val {provers, max_facts, slice, type_enc, lam_trans, timeout, ...} =

      default_params ctxt []

    val prover = hd provers

    val slack_max_facts = generous_max_facts (the max_facts)

    val lines_of = Path.explode #> try File.read_lines #> these

    val file_names =

      [mepo_file_name, mash_isar_file_name, mash_prover_file_name,

       mesh_isar_file_name, mesh_prover_file_name]

    val lines as [mepo_lines, mash_isar_lines, mash_prover_lines,

                  mesh_isar_lines, mesh_prover_lines] =

      map lines_of file_names

    val num_lines = fold (Integer.max o length) lines 0

    fun pad lines = lines @ replicate (num_lines - length lines) ""

    val lines =

      pad mepo_lines ~~ pad mash_isar_lines ~~ pad mash_prover_lines ~~

      pad mesh_isar_lines ~~ pad mesh_prover_lines

    val css = clasimpset_rule_table_of ctxt

    val facts = all_facts ctxt true false Symtab.empty [] [] css

    val name_tabs = build_name_tables nickname_of_thm facts

    fun with_index facts s = (find_index (curry (op =) s) facts + 1, s)

    fun index_str (j, s) = s ^ "@" ^ string_of_int j

    val str_of_method = enclose "  " ": "

    fun str_of_result method facts ({outcome, run_time, used_facts, ...}

                                     : prover_result) =

      let val facts = facts |> map (fn ((name, _), _) => name ()) in

        str_of_method method ^

        (if is_none outcome then

           "Success (" ^ ATP_Util.string_from_time run_time ^ "): " ^

           (used_facts |> map (with_index facts o fst)

                       |> sort (int_ord o pairself fst)

                       |> map index_str

                       |> space_implode " ") ^

           (if length facts < the max_facts then

              " (of " ^ string_of_int (length facts) ^ ")"

            else

              "")

         else

           "Failure: " ^

           (facts |> take (the max_facts) |> tag_list 1

                  |> map index_str

                  |> space_implode " "))

      end

    fun solve_goal (j, ((((mepo_line, mash_isar_line), mash_prover_line),

                         mesh_isar_line), mesh_prover_line)) =

      if in_range range j then

        let

          val get_suggs = extract_suggestions ##> take slack_max_facts

          val (name1, mepo_suggs) = get_suggs mepo_line

          val (name2, mash_isar_suggs) = get_suggs mash_isar_line

          val (name3, mash_prover_suggs) = get_suggs mash_prover_line

          val (name4, mesh_isar_suggs) = get_suggs mesh_isar_line

          val (name5, mesh_prover_suggs) = get_suggs mesh_prover_line

          val [name] =

            [name1, name2, name3, name4, name5]

            |> filter (curry (op <>) "") |> distinct (op =)

            handle General.Match => error "Input files out of sync."

          val th =

            case find_first (fn (_, th) => nickname_of_thm th = name) facts of

              SOME (_, th) => th

            | NONE => error ("No fact called \"" ^ name ^ "\".")

          val goal = goal_of_thm (Proof_Context.theory_of ctxt) th

          val (_, hyp_ts, concl_t) = ATP_Util.strip_subgoal ctxt goal 1

          val isar_deps = isar_dependencies_of name_tabs th

          val facts = facts |> filter (fn (_, th') => thm_ord (th', th) = LESS)

          val find_suggs = find_suggested_facts facts

          fun get_facts [] compute = compute facts

            | get_facts suggs _ = find_suggs suggs

          val mepo_facts =

            get_facts mepo_suggs (fn _ =>

                mepo_suggested_facts ctxt params prover slack_max_facts NONE

                                     hyp_ts concl_t facts)

            |> weight_mepo_facts

          fun mash_of suggs =

            get_facts suggs (fn _ =>

                find_mash_suggestions slack_max_facts suggs facts [] [] |> fst)

            |> weight_mash_facts

          val mash_isar_facts = mash_of mash_isar_suggs

          val mash_prover_facts = mash_of mash_prover_suggs

          fun mess_of mash_facts =

            [(mepo_weight, (mepo_facts, [])),

             (mash_weight, (mash_facts, []))]

          fun mesh_of suggs mash_facts =

            get_facts suggs (fn _ =>

                mesh_facts (Thm.eq_thm_prop o pairself snd) slack_max_facts

                           (mess_of mash_facts))

          val mesh_isar_facts = mesh_of mesh_isar_suggs mash_isar_facts

          val mesh_prover_facts = mesh_of mesh_prover_suggs mash_prover_facts

          val isar_facts = find_suggs isar_deps

          (* adapted from "mirabelle_sledgehammer.ML" *)

          fun set_file_name method (SOME dir) =

              let

                val prob_prefix =

                  "goal_" ^ string_of_int j ^ "__" ^ encode_str name ^ "__" ^

                  method

              in

                Config.put dest_dir dir

                #> Config.put problem_prefix (prob_prefix ^ "__")

                #> Config.put SMT_Config.debug_files (dir ^ "/" ^ prob_prefix)

              end

            | set_file_name _ NONE = I

          fun prove method get facts =

            if not (member (op =) methods method) orelse

               (null facts andalso method <> IsarN) then

              (str_of_method method ^ "Skipped", 0)

            else

              let

                fun nickify ((_, stature), th) =

                  ((K (encode_str (nickname_of_thm th)), stature), th)

                val facts =

                  facts

                  |> map (get #> nickify)

                  |> maybe_instantiate_inducts ctxt hyp_ts concl_t

                  |> take (the max_facts)

                val ctxt = ctxt |> set_file_name method prob_dir_name

                val res as {outcome, ...} =

                  run_prover_for_mash ctxt params prover facts goal

                val ok = if is_none outcome then 1 else 0

              in (str_of_result method facts res, ok) end

          val ress =

            [fn () => prove MePoN fst mepo_facts,

             fn () => prove MaSh_IsarN fst mash_isar_facts,

             fn () => prove MaSh_ProverN fst mash_prover_facts,

             fn () => prove MeSh_IsarN I mesh_isar_facts,

             fn () => prove MeSh_ProverN I mesh_prover_facts,

             fn () => prove IsarN I isar_facts]

            |> (* Par_List. *) map (fn f => f ())

        in

          "Goal " ^ string_of_int j ^ ": " ^ name :: map fst ress

          |> cat_lines |> print;

          map snd ress

        end

      else

        [0, 0, 0, 0, 0, 0]

    fun total_of method ok n =

      str_of_method method ^ string_of_int ok ^ " (" ^

      Real.fmt (StringCvt.FIX (SOME 1))

               (100.0 * Real.fromInt ok / Real.fromInt n) ^ "%)"

    val inst_inducts = Config.get ctxt instantiate_inducts

    val options =

      ["prover = " ^ prover,

       "max_facts = " ^ string_of_int (the max_facts),

       "slice" |> not slice ? prefix "dont_",

       "type_enc = " ^ the_default "smart" type_enc,

       "lam_trans = " ^ the_default "smart" lam_trans,

       "timeout = " ^ ATP_Util.string_from_time (the_default one_year timeout),

       "instantiate_inducts" |> not inst_inducts ? prefix "dont_"]

    val _ = print " * * *";

    val _ = print ("Options: " ^ commas options);

    val oks = Par_List.map solve_goal (tag_list 1 lines)

    val n = length oks

    val [mepo_ok, mash_isar_ok, mash_prover_ok, mesh_isar_ok, mesh_prover_ok,

         isar_ok] =

      map Integer.sum (map_transpose I oks)

  in

    ["Successes (of " ^ string_of_int n ^ " goals)",

     total_of MePoN mepo_ok n,

     total_of MaSh_IsarN mash_isar_ok n,

     total_of MaSh_ProverN mash_prover_ok n,

     total_of MeSh_IsarN mesh_isar_ok n,

     total_of MeSh_ProverN mesh_prover_ok n,

     total_of IsarN isar_ok n]

    |> cat_lines |> print

  end

end;