(*****************************************************************************
 * su4sml --- a SML repository for managing (Secure)UML/OCL models
 *             http://projects.brucker.ch/su4sml/
 *                                                                            
 * context_declarations.sml --- 
 * This file is part of su4sml.
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 * Copyright (c) 2005-2007 ETH Zurich, Switzerland
 *               2008-2009 Achim D. Brucker, Germany
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(* $Id: context_declarations.sml 6727 2007-07-30 08:43:40Z brucker $ *)

signature WFCPOG_REFINE_CONSTRAINT =
sig
    type RFM_args 

    structure WFCPOG_RFM_Data :
	      sig
		  type T = RFM_args
		  val get : WFCPOG.wfpo -> T
		  val put : T -> WFCPOG.wfpo -> WFCPOG.wfpo
		  val map : (T -> T) -> WFCPOG.wfpo -> WFCPOG.wfpo
	      end	 
    val print_refine_args       : RFM_args -> string	      

    val check_syntax            : WFCPOG.wfpo -> Rep.Model -> bool

    val generate_pos            : WFCPOG.wfpo -> Rep.Model -> (Rep_OclType.Path * Rep_OclTerm.OclTerm) list 
end
structure WFCPOG_Refine_Constraint : WFCPOG_REFINE_CONSTRAINT =
struct

(* su4sml *)
open Rep_Helper
open Rep_Core
open Rep_OclTerm
open Rep_OclType
open Rep2String
open ModelImport
open Rep_HolOcl_Namespace
open Rep_HolOcl_Helper
(* wfcpo-gen *)
open WFCPOG_Library

exception ClassGroupError of Rep_Core.Classifier list * string
exception OpGroupError of Rep_Core.operation list * string


type RFM_args = {
     key : int,
     rfm_tuple : (Rep_OclType.Path * Rep_OclType.Path)
}



structure WFCPOG_RFM_Data = WFCPOG_DataFun
		     (struct
		      type T = RFM_args;
		      val empty = ({key=10,rfm_tuple=([]:Path,[]:Path)});
		      fun copy T = T;
		      fun extend T = T;
		      end);

fun print_refine_args (args:RFM_args) = 
    let 
	val tuple = (#rfm_tuple args)
    in
	(String.concat ["Refine rmf_tuple with args: abstract package = ",(string_of_path (#1 tuple)),", concrete package = ",(string_of_path (#2 tuple)),".\n"])
    end
fun rm x [] = [] 
  | rm x [b] = if (x = b) then [] else [b] 
  | rm x (h::tail) = if (x = h) then (rm x tail) else (h::(rm x tail))
						      
fun group_cl [] [] = []
  | group_cl [] toC = []
  | group_cl FromC [] = 
    let
	val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
	val s2 = "Classifiers " ^(String.concat (List.map (fn a => ((string_of_path (name_of a))^", ")) FromC))^" of abstract package have no corresponding classifiers in concrete package.\n"
    in
	raise WFCPOG.WFC_FailedMessage (s1^s2)
    end
  | group_cl (h1::t1) list =
    let
	val _ = Logger.info  ("WFCPOG_Refine_Constraint.group_cl \n")
	val _ = Logger.debug1 ("Class: " ^ string_of_path (name_of h1) ^ "\n")
	val x = List.filter (fn a => ((List.last (name_of a)) = (List.last (name_of h1)))) list
	val res = 
	    case  (List.length(x)) of 
		0 => 
		let
		    val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
		    val s2 = "Classifier " ^ (string_of_path (name_of h1)) ^ " of abstract package has no corresponding classifier in concrete package.\n"
		in
		    raise WFCPOG.WFC_FailedMessage (s1^s2)
		end
	      | 1 => (h1,hd(x))::(group_cl t1 (rm (hd(x)) list))
	      | x => 
		let
		    val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
		    val s2 = "Something extremely strange happened. It seemed that the concrete package has two classifiers with the same name!. \nPLEASE CHECK THE CLASSIFIERS OF THE CONCRETE PACKAGE FOR THE OCCURENCE OF DUPLICATES.\n"
		in
		    raise WFCPOG.WFC_FailedMessage (s1^s2)
		end
	val _ = Logger.info ("WFCPOG_Refine_Constraint.group_cl \n")
    in
	res
    end

fun group_op class_name [] [] = []
  | group_op class_name fromOps [] = 
    let
	val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
	val s2 = "The abstract classifier "^class_name^" its operations " ^(String.concat (List.map (fn a => ((name_of_op a)^", ")) fromOps))^" have no corresponding operations in the concrete classifier.\n"
    in
	raise WFCPOG.WFC_FailedMessage (s1^s2)
    end
  | group_op class_name [] toOps = []
  | group_op class_name ((h1:operation)::t1) list =
    let
	(* TODO: Check also signature because of the overloaded operations! *)
	val _ = Logger.info ("WFCPOG_Refine_Constraint.group_op \n")
	val x = (List.filter (fn a => ((name_of_op a) = (name_of_op h1))) list)
	val res = 
	    case  (List.length(x)) of 
		0 => 
		let
		    val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
		    val s2 = "The abstract classifier "^class_name^" its operation " ^(name_of_op h1)^ " has no corresponding operation in the concrete classifier.\n"
		in
		    raise WFCPOG.WFC_FailedMessage (s1^s2)
		end
	      | 1 => (h1,List.hd(x))::(group_op class_name t1 (rm (List.hd(x)) list))
	      | x => 
		let
		    val s1 = "SYNTAX ERROR: OO Refinement syntax check\n\n"
		    val s2 = "Something extremely strange happened. It seemed that the classifier "^class_name^"has two operations with the same name!. \nPLEASE CHECK THE CLASSIFIERS OF THE CONCRETE PACKAGE FOR THE OCCURENCE OF DUPLICATES.\n"
		in
		    raise WFCPOG.WFC_FailedMessage (s1^s2)
		end
	val _ = Logger.info ("WFCPOG_Refine_Constraint.group_op \n")
    in
	res
    end

(* RETURN: (Classifier * Classifer) list *)
fun map_public_classes fromPath toPath (model as (clist,alist)) = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.map_public_classes\n")
	val abs_c = List.filter (is_visible_cl) (List.filter (fn a => if (package_of a = fromPath) then true else false) (clist))
	val _ = Logger.debug1 ("abstract public classes: \n")
	val _ = List.map (fn a => Logger.debug1 (" - " ^ (string_of_path (name_of a))^"\n")) abs_c
	val _ = Logger.debug1 ("map_public_classes 2 \n")
	val _ = Logger.debug1 ("Package " ^ string_of_path (fromPath) ^ " contains " ^ Int.toString (List.length(abs_c)) ^ " public classes.\n")
	val conc_c = List.filter (is_visible_cl) (List.filter (fn a => if (package_of a = toPath) then true else false) (clist))
	val _ = Logger.debug1 ("concrete public classes: \n")
	val _ = List.map (fn a => Logger.debug1 (" - " ^ (string_of_path (name_of a))^"\n")) conc_c
	val _ = Logger.debug1 ("Package " ^ string_of_path (toPath) ^ " contains " ^ Int.toString (List.length(conc_c)) ^ " public classes.\n")
	val _ = Logger.debug1 ("map_public_classes 3 \n")
	val res = group_cl abs_c conc_c
(* 
	handle WFCPOG.WFC_FailedMessage s => 
	       let
		   val s1 = ("SYNTAX ERROR: Class consistency \n\n")
		   val s2 = ("The following public classes are not included in the refined class:\n\n") 
		   val s3 = (String.concat (List.map (fn a => (" * " ^ (string_of_path (name_of a)) ^ "\n")) clist))
	       in 
		   raise WFCPOG.WFC_FailedMessage (s1^s2^s3)
	       end
	val _ = Logger.info ("WFCPOG_Refine_Constraint.map_public_classes\n")
*)
    in
	res
    end

fun map_public_ops [] = [[]]
  | map_public_ops ((f,t)::tail) = 
    let
	val _ = Logger.info ("Refine_Constraint.map_public_ops\n")
	val f_ops = List.filter (is_visible_op) (local_operations_of f)
	val t_ops = List.filter (is_visible_op) (local_operations_of t)
	val _ = Logger.debug1 ("Number of operations of f_class(" ^ (string_of_path (name_of f)) ^ ") = " ^ Int.toString (List.length(f_ops)) ^ "\n")
	val _ = Logger.debug1 ("Number of operations of t_class(" ^ (string_of_path (name_of t)) ^ ") = " ^ Int.toString (List.length(t_ops)) ^ "\n")
	val res = 
	    [(List.map (fn (a,b) => (f,t,a,b)) (group_op (List.last (Rep_Core.name_of f))  f_ops t_ops
						handle OpGroupError (oplist,s) => 
						       let
							   val s1 = ("SYNTAX ERROR: Operation consistency \n\n")
							   val s2 = ("FromClass = " ^ (string_of_path (name_of f)) ^ "\n")
							   val s3 = ("ToClass = " ^ (string_of_path (name_of t)) ^ "\n")
							   val s4 = ("The following public operations are not included in the refined classes:\n\n") 
							   val s5 = (String.concat (List.map (fn a => (" * " ^ (operation2string a) ^ "\n")) oplist))
						       in 
							   raise WFCPOG.WFC_FailedMessage (s1^s2^s3^s4^s5)
						       end     
	    ))]
	    @(map_public_ops tail)
	val _ = Logger.info ("Refine_Constraint.map_public_op\n")
    in
	res 
    end
    
    
    
fun map_types [] fP tP model = []
  | map_types ((h1:Classifier,h2:Classifier,h3:operation,h4:operation)::tail) fP tP model =
    let
	val _ = Logger.info ("WFCPOG_Refine_Constrain.map_types\n")
	val _ = Logger.debug1 ("map_types: f_cl = " ^ string_of_path (name_of h1) ^ "\n")
	val _ = Logger.debug1 ("map_types: t_cl = " ^ string_of_path (name_of h2) ^ "\n")
	val _ = Logger.debug1 ("map_types: f_op = " ^ name_of_op h3 ^ "\n")
	val _ = Logger.debug1 ("map_types: t_op = " ^ name_of_op h4 ^ "\n")
	(* classifier of return type *)
	(* TODO: remove next trace lines *)
	val _ = Logger.debug1 ("Length of model: " ^ Int.toString (List.length(#1 model))^ ".\n")
	val ret_fC = class_of_type (#result (h3)) model
	val _ = Logger.debug1 ("map_types 2 \n")
	(* name of classifier of return type *)
	val ret_namefC = name_of ret_fC
	val _ = Logger.debug1 ("map_types_3: " ^ string_of_path (ret_namefC) ^ "\n")
	val _ = Logger.debug1 ("map_types_4: " ^ string_of_path fP ^ "\n")
	(* relative path of return type *)
	val new_path = substitute_package fP tP ret_namefC
	val _ = Logger.debug1 ("map_types_5: name of return type: " ^ string_of_path (ret_namefC) ^ "\n")
	val c1 = class_of (new_path) (model)
		 handle _ => 
			let
			    val s1 = ("\n\n#####################################################################\n")
			    val s2 = ("#####################################################################\n\n")
			    val s3 = ("SYNTAX ERROR: Map types \n\n")
			    val s4 = ("The return type of the operation " ^ (operation2string h3) ^ " is inconsistent.\n")
			    val s4 = ("The refining package has no corresponding class.\n")
			    val s5 = ("Existing FromClass = " ^ (string_of_path (name_of h1)) ^ "\n")
			    val s6 = ("Inexisting ToClass = " ^ (string_of_path (name_of h2)) ^ "\n")
			in 
			    raise WFCPOG.WFC_FailedMessage (s1^s2^s3^s4^s5^s6)
			end
	(* name of the arguments *)
	val _ = Logger.debug1 ("map_types_6: " ^ string_of_path (name_of c1) ^ "\n")
	val arg_class_name1 = List.map (fn (a,b) => (name_of (class_of_type b model))) (arguments_of_op (h3))
	val _ = Logger.debug1 ("map_types_7: \n")
	val c2 = List.map (fn a => 
			      let
				  val rel_path = substitute_package fP tP a
			      in
				  class_of (rel_path) (model)
				  handle _ => 
					 let
					     val s1 = ("\n\n########################################################\n")
					     val s2 = ("########################################################\n\n")
					     val s3 = ("SYNTAX ERROR: Map types \n\n")
					     val s4 = ("One of the arguments type of the operation " ^ (operation2string h3) ^ " is inconsistent.\n")
					     val s5 = ("The refining package has no corresponding class.\n")
					     val s6 = ("Existing FromClass = " ^ (string_of_path (name_of h1)) ^ "\n")
					     val s7 = ("Inexisting ToClass = " ^ (string_of_path (name_of h2)) ^ "\n")
					 in 
					     raise WFCPOG.WFC_FailedMessage (s1^s2^s3^s4^s5^s6^s7)
					 end
			      end
			  ) arg_class_name1
	val _ = Logger.debug1 ("map_types_8: \n")
	val res = (true)::(map_types tail fP tP model)
	val _ = Logger.info ("WFCPOG_Refine_Constrain.map_types\n")
    in 
	res
    end

fun check_syntax_help (model:Rep.Model as (clist,alist)) fromPath toPath = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.check_syntax_help\n")
	(* check public classes of the two packages *)
	val x = map_public_classes fromPath toPath model
        val _ = Logger.debug1 ("check syntax 2 \n")
	(* check public methods of the public classes *)
	val y = List.concat (map_public_ops x)
	val _ = Logger.debug1 ("check syntax 3 \n")
	(* check types of the public operations of public classes *)
	val z = map_types y fromPath toPath model
	val _ = Logger.debug1 ("check syntax 4 \n")
	val res = List.all (fn a => a) z
	val _ = Logger.info ("WFCPOG_Refine_Constraint.check_syntax_help\n")
    in
	res
    end



fun check_syntax wfpo (model:Rep.Model as (clist,alist)) = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.check_syntax\n")
	val data = WFCPOG_RFM_Data.get wfpo
	val _ = Logger.debug1 (print_refine_args data)
	val packages = (#rfm_tuple data)
	val from = (#1 packages)
	val to = (#2 packages)
	val model_packages = all_packages_of_model model
	val _ = Logger.debug1 ("Packages of model: "^(String.concat (List.map (fn a => ((string_of_path a)^", ")) model_packages))^".\n")
	val _ = Logger.debug1 ("Abstract Package = "^(string_of_path from)^", contains "^(Int.toString (List.length(from)))^" strings.\n")
	val _ = Logger.debug1 ("Concrete Package = "^(string_of_path to)^", contains "^(Int.toString(List.length(from)))^" strings.\n")
	val check = if ((member from model_packages) andalso (member to model_packages))
		    then check_syntax_help model from to
			 handle WFCPOG.WFC_FailedMessage s => raise WFCPOG.WFC_FailedException (wfpo,s)
		    else
			let
			    val s1 = ("\n\n########################################################\n")
			    val s2 = ("########################################################\n\n")
			    val s3 = ("SYNTAX ERROR: check_syntax\n\n")
			    val s4 = ("No classifier where found with the package name of the abstract or concrete path.\n")
			in
			    raise WFCPOG.WFC_FailedException (wfpo,s1^s2^s3^s4)
			end 
	val _ = Logger.info ("WFCPOG_Refine_Constraint.check_syntax\n")
    in
	check
    end

(* 
fun refine_operation abs_oper conc_oper abs_class conc_class model = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")
	val state = Variable("mystate",OclState)
 	val op_term = get_holocl_operation ("abs") abs_oper abs_class model
	val refine = OperationCall (op_term,DummyT,["holOclLib","Boolean","OclLocalValid"],[(state,OclState)],Boolean)
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")	
    in
	(["po_refine_"^(string_of_path (name_of abs_class))^"_"^(string_of_path (name_of conc_class))^"_"^(name_of_op abs_oper)],refine)
    end
*)

fun refine_operation abs_oper conc_oper abs_class conc_class model = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")
 	val R = get_holocl_abstraction_relation abs_class conc_class model
 	val S = get_holocl_operation ("abs") abs_oper abs_class model
	val T = get_holocl_operation ("conc") conc_oper conc_class model
	val refine = OperationCall(S,DummyT,["holOclLib","methodology","refinement","OclForwardRefinement"],[(T,DummyT),(R,DummyT)],Boolean)
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")	
    in
	(["po_refine_"^(string_of_path (name_of abs_class))^"_"^(string_of_path (name_of conc_class))^"_"^(name_of_op abs_oper)],refine)
    end

fun refine_classifier abs_class conc_class model = 
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")
	val abs_ops = List.filter (is_visible_op) (local_operations_of abs_class)
	val conc_ops = List.filter (is_visible_op) (local_operations_of conc_class)
	val gops = group_op (List.last (Rep_Core.name_of abs_class)) abs_ops conc_ops
	val res = List.map (fn (a,b) => refine_operation a b abs_class conc_class model) (gops)
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_classifier\n")
    in
	res
    end

fun refine_package abs_path conc_path (model as (clist,alist)) =
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_package\n")
	val abs_classes = List.filter (fn a => (package_of a = abs_path) andalso (is_visible_cl a)) (clist)
	val conc_classes = List.filter (fn a => (package_of a = conc_path) andalso (is_visible_cl a)) (clist)
	val cl_grouped = group_cl abs_classes conc_classes
	val res = (List.concat (List.map (fn (a,b) => refine_classifier a b model) cl_grouped))
	val _ = Logger.info ("WFCPOG_Refine_Constraint.refine_package\n")
    in
	res
    end

fun generate_pos wfpo (model as (clist,alist)) =
    let
	val _ = Logger.info ("WFCPOG_Refine_Constraint.generate_pos\n")
	val _ = Logger.debug1 ("remove OclLib ...\n")
	val classes = removeOclLibrary clist
	val _ = Logger.debug1 ("oclLib removed ...\n")
	val _ = Logger.debug1 ("Extract args ...\n")
	val rfm_args = WFCPOG_RFM_Data.get wfpo
	val packages = (#rfm_tuple rfm_args)
	val _ = Logger.debug1("Args extracted ...\n")
	val res = refine_package (#1 packages) (#2 packages) model
	val _ = Logger.info ("WFCPOG_Refine_Constraint.generate_pos\n")
    in	
	res
    end
end;