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(********************************************************************)
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(*                                                                  *)
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(*  The LustreC compiler toolset   /  The LustreC Development Team  *)
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(*  Copyright 2012 -    --   ONERA - CNRS - INPT                    *)
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(*                                                                  *)
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(*  LustreC is free software, distributed WITHOUT ANY WARRANTY      *)
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(*  under the terms of the GNU Lesser General Public License        *)
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(*  version 2.1.                                                    *)
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(*                                                                  *)
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(********************************************************************)
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open Options
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let print_version () =
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  let open Utils.Format in
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  printf
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    "@[<v>\
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     Lustrec compiler, version %s (%s)@,\
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     Standard lib: %s@,\
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     User provided include directory: @[<h>%a@]\
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     @]@."
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    version codename
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    Version.include_path
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    (pp_print_list ~pp_sep:pp_print_space pp_print_string) !include_dirs
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let add_include_dir dir =
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  let removed_slash_suffix =
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    let len = String.length dir in
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    if dir.[len-1] = '/' then
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      String.sub dir 0 (len - 1)
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    else
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      dir
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  in
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  include_dirs := removed_slash_suffix :: !include_dirs
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(** Solving the path of required library:
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    If local: look in the folders described in !Options.include_dirs
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    If non local: look first as a local, then in Version.include_path:
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    ie. in Version.include_path::!Options.include_dirs
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    Note that in options.ml, include folder are added as heads. One need to
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    perform a fold_right to respect the order
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*)
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let search_lib_path (local, full_file_name) =
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  let paths = (if local then !include_dirs else Version.include_path::!include_dirs) in
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  let name =
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    List.fold_right (fun dir res ->
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      match res with Some _ -> res
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      | None ->
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	 let path_to_lib = dir ^ "/" ^ full_file_name in
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	 if Sys.file_exists path_to_lib then
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	   Some dir
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	 else
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	   None
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    )
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      paths
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      None
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  in
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  match name with
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  | None ->
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    Format.eprintf "Unable to find library %s in paths %a@.@?" full_file_name
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      (Utils.fprintf_list ~sep:", " Format.pp_print_string) paths;
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     raise Not_found
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  | Some s -> s
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(* Search for path of core libs (without lusic: arrow and io_frontend *)
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let core_dependency lib_name =
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  search_lib_path (false, lib_name ^ ".h")
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let name_dependency (_, dep) ext =
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  let dir = search_lib_path (false, dep ^ ext) in
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  dir ^ "/" ^ dep
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let set_mpfr prec =
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  if prec > 0 then (
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    mpfr := true;
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    mpfr_prec := prec;
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    real_type := "mpfr";
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    (* salsa_enabled := false; (* We deactivate salsa *) TODO *)
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  )
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  else
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    failwith "mpfr requires a positive integer"
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let set_real_type s =
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  match s with
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    "mpfr" -> (
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      mpfr := true;
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      real_type := "mpfr";
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    )
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  | _ -> real_type := s
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let setup () =
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  Backends.setup ()
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let set_backend s =
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  output := s
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let common_options =
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  [ "-d", Arg.Set_string dest_dir, "uses the specified \x1b[4mdirectory\x1b[0m as root for generated/imported object and C files <default: .>";
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    "-I", Arg.String add_include_dir, "sets include \x1b[4mdirectory\x1b[0m";
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    "-node", Arg.Set_string main_node, "specifies the \x1b[4mmain\x1b[0m node";
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    "-print-types", Arg.Set print_types, "prints node types";
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    "-print-clocks", Arg.Set print_clocks, "prints node clocks";
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    "-print-nodes",  Arg.Set print_nodes, "prints node list";
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    "-algebraic-loop-solve", Arg.Set solve_al, "try to solve algebraic loops";
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    "-algebraic-loop-max", Arg.Set_int al_nb_max, "try to solve \x1b[4mnb\x1b[0m number of algebraic loops  <default: 15>";
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    "-kind2", Arg.Set kind2_print, "active kind2 output";
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    "-verbose", Arg.Set_int verbose_level, "changes verbose \x1b[4mlevel\x1b[0m <default: 1>";
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    "-version", Arg.Unit print_version, " displays the version";
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  ]
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let lustrec_options =
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  common_options @
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    [
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      "-init", Arg.Set delay_calculus, "performs an initialisation analysis for Lustre nodes <default: no analysis>";
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      "-dynamic", Arg.Clear static_mem, "specifies a dynamic allocation scheme for main Lustre node <default: static>";
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      "-check-access", Arg.Set check, "checks at runtime that array accesses always lie within bounds <default: no check>";
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      "-mpfr", Arg.Int set_mpfr, "replaces FP numbers by the MPFR library multiple precision numbers with a precision of \x1b[4mprec\x1b[0m bits <default: keep FP numbers>";
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      "-lusi", Arg.Set lusi, "only generates a .lusi interface source file from a Lustre source <default: no generation>";
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      "-no-spec", Arg.Unit (fun () -> spec := "no"), "do not generate any specification";
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      "-acsl-spec", Arg.Unit (fun () -> spec := "acsl"), "generates an ACSL encoding of the specification. Only meaningful for the C backend <default>";
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      "-c-spec", Arg.Unit (fun () -> spec := "c"), "generates a C encoding of the specification instead of ACSL contracts and annotations. Only meaningful for the C backend";
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      (* "-java", Arg.Unit (fun () -> output := "java"), "generates Java output instead of C"; *)
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      "-ada", Arg.Unit (fun () -> set_backend "Ada"), "generates Ada encoding output instead of C";
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      "-horn", Arg.Unit (fun () -> set_backend "horn"), "generates Horn clauses encoding output instead of C";
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      "-horn-traces", Arg.Unit (fun () -> set_backend "horn"; traces:=true), "produce traceability file for Horn backend. Enable the horn backend.";
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      "-horn-cex", Arg.Unit (fun () -> set_backend "horn"; horn_cex:=true), "generate cex enumeration. Enable the horn backend (work in progress)";
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      "-horn-query", Arg.Unit (fun () -> set_backend "horn"; horn_query:=true), "generate queries in generated Horn file. Enable the horn backend (work in progress)";
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      "-horn-sfunction", Arg.Set_string sfunction, "Gets the endpoint predicate of the \x1b[4msfunction\x1b[0m";
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      "-print-reuse", Arg.Set print_reuse, "prints variable reuse policy";
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      "-lustre", Arg.Unit (fun () -> output := "lustre"), "generates Lustre output, performing all active optimizations";
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      "-emf", Arg.Unit (fun () -> set_backend "emf"), "generates EMF output, to be used by CocoSim";
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      "-inline", Arg.Unit (fun () -> global_inline := true; const_unfold := true), "inlines all node calls (require a main node). Implies constant unfolding";
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      "-witnesses", Arg.Set witnesses, "enables production of witnesses during compilation";
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      "-O", Arg.Set_int optimization, "changes optimization \x1b[4mlevel\x1b[0m <default: 2>";
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      "-c++" , Arg.Set        cpp      , "c++ backend";
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      "-int" , Arg.Set_string int_type , "specifies the integer type (default=\"int\")";
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      "-real", Arg.String set_real_type, "specifies the real type (default=\"double\" without mpfr option)";
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      "-real-print-prec", Arg.Set_int print_prec_double, "specifies the number of digits to be printed for real values (default=15)";
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      "-int_div_euclidean", Arg.Set integer_div_euclidean, "interprets integer division as Euclidean (default : C division semantics)";
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      "-int_div_C", Arg.Clear integer_div_euclidean, "interprets integer division as C division (default)";
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    "-mauve", Arg.String (fun node -> mauve := node; cpp := true; static_mem := false), "generates the mauve code";
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]
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let lustret_options =
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  common_options @
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  [ "-nb-mutants", Arg.Set_int nb_mutants, "\x1b[4mnumber\x1b[0m of mutants to produce <default: 1000>";
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    "-mcdc-cond", Arg.Set gen_mcdc, "generates MC/DC coverage";
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    "-no-mutation-suffix", Arg.Set no_mutation_suffix, "does not rename node with the _mutant suffix"
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  ]
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let lustrev_options =
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   common_options @
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  [ 
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   "-inline", Arg.Unit (fun () -> global_inline := true; const_unfold := true), "inlines all node calls (require a main node). Implies constant unfolding";
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    "-O", Arg.Set_int optimization, "changes optimization \x1b[4mlevel\x1b[0m <default: 2>";
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]
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let plugin_opt (name, activate, usage, options) =
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  let usage () =
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    Format.printf "@[<v 2>Plugin %s:@ %t@]@." name usage;
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    exit 0
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  in
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  ( "-" ^ name , Arg.Unit activate, "activate plugin " ^ name ) ::
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  ( "-" ^ name ^ "-help" , Arg.Unit usage, "plugin " ^ name ^ " help") ::
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    (List.map (fun (opt, act, desc) -> "-" ^ name ^ opt, act, desc) options)
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let verifier_opt (name, activate, options) =
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  ( "-" ^ name , Arg.Unit activate, "run verifier " ^ name ) ::
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    (List.map (fun (opt, act, desc) -> "-" ^ name ^ opt, act, desc) options)
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let get_witness_dir filename =
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  (* Make sure the directory exists *)
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  let dir = !dest_dir ^ "/" ^ (Filename.basename filename) ^ "_witnesses" in
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  let _ = try
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	    if not (Sys.is_directory dir) then (
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	      Format.eprintf "File of name %s exists. It should be a directory.@." dir;
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	      exit 1
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	    )
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    with Sys_error _ -> Unix.mkdir dir 0o750
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  in
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  dir
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