(*  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 evaluate_mash_suggestions :

    Proof.context -> params -> theory -> string -> unit

end;

structure MaSh_Eval : MASH_EVAL =

struct

open Sledgehammer_Fact

open Sledgehammer_MaSh

val MePoN = "MePo"

val MaShN = "MaSh"

val MeshN = "Mesh"

val IsarN = "Isar"

val max_facts_slack = 2

val all_names = map (rpair () o nickname_of) #> Symtab.make

fun evaluate_mash_suggestions ctxt params thy file_name =

  let

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

      Sledgehammer_Isar.default_params ctxt []

    val prover = hd provers

    val slack_max_facts = max_facts_slack * the max_facts

    val path = file_name |> Path.explode

    val lines = path |> File.read_lines

    val css = Sledgehammer_Fact.clasimpset_rule_table_of ctxt

    val facts =

      all_facts (Proof_Context.init_global thy) false Symtab.empty [] [] css

    val all_names = all_names (facts |> map snd)

    val mepo_ok = Unsynchronized.ref 0

    val mash_ok = Unsynchronized.ref 0

    val mesh_ok = Unsynchronized.ref 0

    val isar_ok = Unsynchronized.ref 0

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

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

    fun str_of_res label facts {outcome, run_time, used_facts, ...} =

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

        "  " ^ label ^ ": " ^

        (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_string

                       |> 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_string

                  |> space_implode " "))

      end

    fun solve_goal (j, line) =

      let

        val (name, suggs) = extract_query line

        val th =

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

            SOME (_, th) => th

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

        val goal = goal_of_thm thy th

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

        val isar_deps = isar_dependencies_of all_names th |> these

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

        val mepo_facts =

          Sledgehammer_MePo.mepo_suggested_facts ctxt params prover

              slack_max_facts NONE hyp_ts concl_t facts

          |> Sledgehammer_MePo.weight_mepo_facts

        val mash_facts = suggested_facts suggs facts

        val mess = [(mepo_facts, []), (mash_facts, [])]

        val mesh_facts = mesh_facts slack_max_facts mess

        val isar_facts = suggested_facts (map (rpair 1.0) isar_deps) facts

        fun prove ok heading get facts =

          let

            val facts =

              facts |> map get

                    |> Sledgehammer_Fact.maybe_instantiate_inducts ctxt hyp_ts

                                                                   concl_t

                    |> take (the max_facts)

            val res as {outcome, ...} =

              run_prover_for_mash ctxt params prover facts goal

            val _ = if is_none outcome then ok := !ok + 1 else ()

          in str_of_res heading facts res end

        val mepo_s = prove mepo_ok MePoN fst mepo_facts

        val mash_s = prove mash_ok MaShN fst mash_facts

        val mesh_s = prove mesh_ok MeshN I mesh_facts

        val isar_s = prove isar_ok IsarN fst isar_facts

      in

        ["Goal " ^ string_of_int j ^ ": " ^ name, mepo_s, mash_s, mesh_s,

         isar_s]

        |> cat_lines |> tracing

      end

    fun total_of heading ok n =

      "  " ^ heading ^ ": " ^ string_of_int (!ok) ^ " (" ^

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

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

    val inst_inducts = Config.get ctxt Sledgehammer_Fact.instantiate_inducts

    val options =

      [prover, string_of_int (the max_facts) ^ " facts",

       "slice" |> not slice ? prefix "dont_", the_default "smart" type_enc,

       the_default "smart" lam_trans, ATP_Util.string_from_time timeout,

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

    val n = length lines

  in

    tracing " * * *";

    tracing ("Options: " ^ commas options);

    List.app solve_goal (tag_list 1 lines);

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

     total_of MePoN mepo_ok n,

     total_of MaShN mash_ok n,

     total_of MeshN mesh_ok n,

     total_of IsarN isar_ok n]

    |> cat_lines |> tracing

  end

end;