(* Title:  Specify/specification.sml

   Author: Walther Neuper, Mathias Lehnfeld

   (c) due to copyright terms

*)

(* Survey on type fmz_ .. type ori .. type itm (in probl, meth) .. formal args of root-/SubProblem

   and relations between respective list elements:                                       #1#

                  fmz      =             [ dsc $ v......................................(dsc $ v)..]

root problem on pos = ([], _)            

                  fmz_     =             [(dsc, v).......................................(dsc, v)..]

                  \<down>                                                                       

                  oris     =             [(dsc, v)..(dsc, v),(dsc, v),(dsc, v)...........(dsc, v)..]

                  \<down>                       #Given,..,#Relate  #Find     #undef............#undef   \<down>

                  \<down>                                                     \<down>                 \<down>       \<down>

  Specify_Problem + pbl.ppc=             [(dsc,id)..(dsc,id),(dsc,id)]  \<down>                 \<down>       \<down>

                  \<down>                                                     \<down>                 \<down>       \<down>

                  itms     =             [(dsc, v)..(dsc, v),(dsc, v)]  \<down>                 \<down>       \<down>

  int.modelling                           +Cor ++++++++++Cor +Cor       \<down>                 \<down>       \<down>

                  \<down>                                                     \<down>                 \<down>       \<down>

  Specify_Method  + met.ppc=             [(dsc,id)..(dsc,id),(dsc,id)]  \<down>                 \<down>       \<down>

                  \<down>                                                     \<down>                 \<down>       \<down>

                  itms     =             [(dsc, v)..(dsc, v),(dsc, v),(dsc, v)..(dsc, v)] \<down>       \<down>

  int.modelling                                                       +Cor ++++++Cor      \<down>       \<down>

                  form.args=             [ id ..... id      , ///////  id ....... id    ] \<down>       \<down>

                  env =                  [(id, v)..(id, v)  , /////// (id, v)....(id, v)] \<down>       \<down>

  interpret code env = [(id, v)..(id, v),(id, v)..(id, v)  , /////// (id, v)....(id, v)] \<down>       \<down>

    ..extends env       ^^^^^^^^^^^^^^^^   \<down>                           \<down>   \<down>              \<down>       \<down>

                                   \<down>       \<down>                           \<down>   \<down>              \<down>       \<down>

SubProblem on pos = ([2], _)       \<down>       \<down>                           \<down>   \<down>              \<down>       \<down>

                  form.args=      [id ................................ id ]\<down>              \<down>       \<down>

                  \<down>                REAL..BOOL..                            \<down>              \<down>       \<down>

                  \<down>                                                        \<down>              \<down>       \<down>

                  + met.ppc=      [(dsc,id).......................(dsc,id)]\<down>              \<down>       \<down>

                                    \<down>                               \<down>      \<down>              \<down>       \<down>

                  oris     =      [(dsc, v)...................... (dsc,   v) ........... (dsc, v)]\<down>

  Specify_Problem, int.modelling, Specify_Method, interpret code as above                 #1#    \<down>

                                                                                                  \<down>

SubProblem on pos = ([3, 4], _)                                                                   \<down>

                  form.args=              [id ...................... id ]                         \<down>

                  \<down>                        REAL..BOOL..                                           \<down>

                  + met.ppc=              [(dsc,id).............(dsc,id)]                         \<down>

                  oris     =              [(dsc, v).............(dsc, v)...................(dsc, v)] 

  Specify_Problem, int.modelling, Specify_Method, interpret code as above                    #1#

Notes:

(1) SubProblem implements sub-function calls such, that the arguments (+ pre- + post-condition)

    of the functions become concern of interactive modelling.

(2) In Isac-terms, the above concerns the phases of modelling and 

    and of specifying (Specify_Problem, Specify_Method),

    while stepwise construction of solutions is called solving.

    The latter is supported by Lucas-Interpretation of the functions' body.

(3) ori list is determined by fmz_ (in root-pbl) or by args of SubProblem;

    it is as complete as possible (this has been different up to now).

(4) itm list is initialised by pbl-ppc | met-pps and completed (Cor) by stepwise user input.

(5) model-pattern of pbl can omit technical items, e.g. boundVariable or functionName,

    add them to the model-pattern of met and let this input be done automatically;

    respective items must be in fmz.

*)

signature SPECIFICATION =

sig

  type T = Specification_Def.T (*see NOTES AT START PIDE-ADAPTION in Specification_Def*)

  val get: Calc.T -> T

  val get_data: Calc.T ->

    I_Model.T * O_Model.T * References.T * I_Model.T * References.T * Proof.context

  val reset: Calc.T -> Calc.T

  val is_complete': I_Model.T -> Pre_Conds.T -> References.T -> bool(*TODO: see I_Mode.is_complete*)

  val is_complete: Calc.T -> bool                                   (*TODO: see I_Mode.is_complete*)

end

(**)

structure SpecificationC(**): SPECIFICATION(**) =

struct

(**)

type T = Specification_Def.T;

(** is SpecificationC complete? **)

(* check i_model either for Problem or MethodC *)

(*whether 

(1) singles are all I_Model.Cor 

(2) Pre_Conds are true

 * TODO-PIDE:

   * replace (1..2) by I_Model.is_complete

   * sort out References

 *)

fun is_complete' its pre (dI, pI, mI) = 

  foldl and_ (true, map #3 (its: I_Model.T)) andalso 

  foldl and_ (true, map #1 (pre: Pre_Conds.T)) andalso 

  dI <> ThyC.id_empty andalso pI <> Problem.id_empty andalso mI <> MethodC.id_empty

(* check I_Model.is_complete either for Problem or MethodC *)

fun is_complete (pt, pos as (p, Pos.Pbl)) =

    if (Ctree.is_pblobj o (Ctree.get_obj I pt)) p 

    then (I_Model.is_complete o (Ctree.get_obj Ctree.g_pbl pt)) p

    else raise ERROR ("is_complete: called by PrfObj at " ^ Pos.pos'2str pos)

  | is_complete (pt, pos as (p, Pos.Met)) = 

    if (Ctree.is_pblobj o (Ctree.get_obj I pt)) p 

    then (I_Model.is_complete o (Ctree.get_obj Ctree.g_met pt)) p

    else raise ERROR ("is_complete: called by PrfObj at " ^ Pos.pos'2str pos)

  | is_complete (_, pos) =

    raise ERROR ("is_complete called by " ^ Pos.pos'2str pos ^ " (should be Pbl or Met)")

(** handle acces to Ctree **)

fun get_data (pt, (p, _)) =

  case Ctree.get_obj I pt p of

    (Ctree.PblObj {meth, origin = (oris, (dI', pI', mI'), _), probl, spec = (dI, pI, mI), ctxt, ...})

      => (meth, oris, (dI', pI', mI'), probl, (dI, pI, mI), ctxt)

  | _ => raise ERROR "specify_additem: uncovered case of get_obj I pt p";

(* get a calchead from a PblObj-node in the ctree; preconditions must be calculated *)

fun get (pt, (p, Pos.Pbl)) = 

    let

	    val (ospec, hdf', spec, probl) = case Ctree.get_obj I pt p of

	      Ctree.PblObj {origin = (_, ospec, hdf'), spec, probl,...} => (ospec, hdf', spec, probl)

	    | _ => raise ERROR "get Pbl: uncovered case get_obj"

      val {prls, where_, ...} = Problem.from_store (#2 (References.select_input ospec spec))

      val (_, pre) = Pre_Conds.check prls where_ probl 0

    in

      (is_complete' probl pre spec, Pos.Pbl, hdf', probl, pre, spec)

    end

  | get (pt, (p, Pos.Met)) = 

    let

		  val (ospec, hdf', spec, meth) = case Ctree.get_obj I pt p of

		    Ctree.PblObj {origin = (_, ospec, hdf'), spec, meth, ...} => (ospec, hdf', spec, meth)

		  | _ => raise ERROR "get Met: uncovered case get_obj"

      val {prls, pre, ...} = MethodC.from_store (#3 (References.select_input ospec spec))

      val (_, pre)  = Pre_Conds.check prls pre meth 0

    in

      (is_complete' meth pre spec, Pos.Met, hdf', meth, pre, spec)

    end

  | get _ = raise ERROR "get: uncovered definition"

(* at the activeFormula set the Specification 

   to empty and return a CalcHead;

   the 'origin' remains (for reconstructing all that) *)

fun reset (pt, (p,_)) = 

  let

    val () = case Ctree.get_obj I pt p of

      Ctree.PblObj _ => ()

    | _ => raise ERROR "reset: uncovered case get_obj"

    val pt = Ctree.update_pbl pt p []

    val pt = Ctree.update_met pt p []

    val pt = Ctree.update_spec pt p References.empty

  in (pt, (p, Pos.Pbl)) end

(**)end(**)