(*  Title:      HOL/TPTP/mash_export.ML

    Author:     Jasmin Blanchette, TU Muenchen

    Copyright   2012

Export Isabelle theory information for MaSh (Machine-learning for Sledgehammer).

*)

signature MASH_EXPORT =

sig

  type params = Sledgehammer_Provers.params

  val generate_accessibility : Proof.context -> theory -> bool -> string -> unit

  val generate_features :

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

  val generate_isar_dependencies :

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

  val generate_atp_dependencies :

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

  val generate_commands : Proof.context -> params -> theory -> string -> unit

  val generate_mepo_suggestions :

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

end;

structure MaSh_Export : MASH_EXPORT =

struct

open Sledgehammer_Fact

open Sledgehammer_MePo

open Sledgehammer_MaSh

fun thy_map_from_facts ths =

  ths |> sort (thm_ord o swap o pairself snd)

      |> map (snd #> `(theory_of_thm #> Context.theory_name))

      |> AList.coalesce (op =)

      |> map (apsnd (map nickname_of))

fun has_thy thy th =

  Context.theory_name thy = Context.theory_name (theory_of_thm th)

fun all_non_technical_facts ctxt thy =

  let val css = Sledgehammer_Fact.clasimpset_rule_table_of ctxt in

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

    |> filter_out (is_thm_technical o snd)

  end

fun parent_facts thy thy_map =

  let

    fun add_last thy =

      case AList.lookup (op =) thy_map (Context.theory_name thy) of

        SOME (last_fact :: _) => insert (op =) last_fact

      | _ => add_parent thy

    and add_parent thy = fold add_last (Theory.parents_of thy)

  in add_parent thy [] end

val thy_name_of_fact = hd o Long_Name.explode

fun thy_of_fact thy = Context.this_theory thy o thy_name_of_fact

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

fun smart_dependencies_of ctxt params prover facts all_names th =

  case atp_dependencies_of ctxt params prover 0 facts all_names th of

    SOME deps => deps

  | NONE => isar_dependencies_of all_names th |> these

fun generate_accessibility ctxt thy include_thy file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    fun do_fact fact prevs =

      let

        val s = escape_meta fact ^ ": " ^ escape_metas prevs ^ "\n"

        val _ = File.append path s

      in [fact] end

    val thy_map =

      all_non_technical_facts ctxt thy

      |> not include_thy ? filter_out (has_thy thy o snd)

      |> thy_map_from_facts

    fun do_thy facts =

      let

        val thy = thy_of_fact thy (hd facts)

        val parents = parent_facts thy thy_map

      in fold_rev do_fact facts parents; () end

  in fold_rev (fn (_, facts) => fn () => do_thy facts) thy_map () end

fun generate_features ctxt prover thy include_thy file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    val facts =

      all_non_technical_facts ctxt thy

      |> not include_thy ? filter_out (has_thy thy o snd)

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

      let

        val name = nickname_of th

        val feats =

          features_of ctxt prover (theory_of_thm th) stature [prop_of th]

        val s = escape_meta name ^ ": " ^ escape_metas feats ^ "\n"

      in File.append path s end

  in List.app do_fact facts end

fun generate_isar_dependencies ctxt thy include_thy file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    val ths =

      all_non_technical_facts ctxt thy

      |> not include_thy ? filter_out (has_thy thy o snd)

      |> map snd

    val all_names = all_names ths

    fun do_thm th =

      let

        val name = nickname_of th

        val deps = isar_dependencies_of all_names th |> these

        val s = escape_meta name ^ ": " ^ escape_metas deps ^ "\n"

      in File.append path s end

  in List.app do_thm ths end

fun generate_atp_dependencies ctxt (params as {provers, ...}) thy include_thy

                              file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    val prover = hd provers

    val facts =

      all_non_technical_facts ctxt thy

      |> not include_thy ? filter_out (has_thy thy o snd)

    val ths = facts |> map snd

    val all_names = all_names ths

    fun do_thm th =

      let

        val name = nickname_of th

        val deps = smart_dependencies_of ctxt params prover facts all_names th

        val s = escape_meta name ^ ": " ^ escape_metas deps ^ "\n"

      in File.append path s end

  in List.app do_thm ths end

fun generate_commands ctxt (params as {provers, ...}) thy file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    val prover = hd provers

    val facts = all_non_technical_facts ctxt thy

    val (new_facts, old_facts) =

      facts |> List.partition (has_thy thy o snd)

            |>> sort (thm_ord o pairself snd)

    val ths = facts |> map snd

    val all_names = all_names ths

    fun do_fact ((_, stature), th) prevs =

      let

        val name = nickname_of th

        val feats = features_of ctxt prover thy stature [prop_of th]

        val deps = smart_dependencies_of ctxt params prover facts all_names th

        val kind = Thm.legacy_get_kind th

        val core =

          escape_meta name ^ ": " ^ escape_metas prevs ^ "; " ^

          escape_metas feats

        val query = if kind <> "" then "? " ^ core ^ "\n" else ""

        val update = "! " ^ core ^ "; " ^ escape_metas deps ^ "\n"

        val _ = File.append path (query ^ update)

      in [name] end

    val thy_map = old_facts |> thy_map_from_facts

    val parents = parent_facts thy thy_map

  in fold do_fact new_facts parents; () end

fun generate_mepo_suggestions ctxt (params as {provers, ...}) thy max_relevant

                              file_name =

  let

    val path = file_name |> Path.explode

    val _ = File.write path ""

    val prover = hd provers

    val facts = all_non_technical_facts ctxt thy

    val (new_facts, old_facts) =

      facts |> List.partition (has_thy thy o snd)

            |>> sort (thm_ord o pairself snd)

    fun do_fact (fact as (_, th)) old_facts =

      let

        val name = nickname_of th

        val goal = goal_of_thm thy th

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

        val kind = Thm.legacy_get_kind th

        val _ =

          if kind <> "" then

            let

              val suggs =

                old_facts

                |> Sledgehammer_MePo.mepo_suggested_facts ctxt params prover

                       max_relevant NONE hyp_ts concl_t

                |> map (fn ((name, _), _) => name ())

              val s = escape_meta name ^ ": " ^ escape_metas suggs ^ "\n"

            in File.append path s end

          else

            ()

      in fact :: old_facts end

  in fold do_fact new_facts old_facts; () end

end;