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(* ----------------------------------------------------------------------------
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 * SchedMCore - A MultiCore Scheduling Framework
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 * Copyright (C) 2009-2011, ONERA, Toulouse, FRANCE - LIFL, Lille, FRANCE
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 *
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 * This file is part of Prelude
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 *
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 * Prelude is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public License
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 * as published by the Free Software Foundation ; either version 2 of
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 * the License, or (at your option) any later version.
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 *
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 * Prelude is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY ; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this program ; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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 * USA
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 *---------------------------------------------------------------------------- *)
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open Corelang
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open LustreSpec
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open Format
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open Utils
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(* Prints [v] as [pp_fun] would do, but adds a backslash at each end of line,
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   following the C convention for multiple lines macro *)
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let pp_as_c_macro pp_fun fmt v =
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  let (out, flush, newline, spaces) = pp_get_all_formatter_output_functions fmt () in
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  let macro_newline () = (out "\\" 0 1; newline ()) in
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  begin
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    pp_set_all_formatter_output_functions fmt out flush macro_newline spaces;
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    pp_fun fmt v;
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    pp_set_all_formatter_output_functions fmt out flush newline spaces;
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  end
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let pp_var_name fmt id = fprintf fmt "%s" id.var_id
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let pp_eq_lhs = fprintf_list ~sep:", " pp_print_string
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let rec pp_struct_const_field fmt (label, c) =
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  fprintf fmt "%a = %a;" pp_print_string label pp_const c
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and pp_const fmt c = 
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  match c with
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    | Const_int i -> pp_print_int fmt i
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    | Const_real r -> pp_print_string fmt r
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    | Const_float r -> pp_print_float fmt r
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    | Const_tag  t -> pp_print_string fmt t
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    | Const_array ca -> Format.fprintf fmt "[%a]" (Utils.fprintf_list ~sep:"," pp_const) ca
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    | Const_struct fl -> Format.fprintf fmt "{%a }" (Utils.fprintf_list ~sep:" " pp_struct_const_field) fl
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and pp_var fmt id = fprintf fmt "%s%s: %a" (if id.var_dec_const then "const " else "") id.var_id Types.print_ty id.var_type
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and pp_node_var fmt id = fprintf fmt "%s%s: %a%a" (if id.var_dec_const then "const " else "") id.var_id Types.print_node_ty id.var_type Clocks.print_ck_suffix id.var_clock
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and pp_expr fmt expr =
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  match expr.expr_desc with
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    | Expr_const c -> pp_const fmt c
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    | Expr_ident id -> Format.fprintf fmt "%s" id
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(*    | Expr_cst_array (c, e) -> fprintf fmt "%a^%a" pp_expr e pp_const c *)
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    | Expr_array a -> fprintf fmt "[%a]" pp_tuple a
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    | Expr_access (a, d) -> fprintf fmt "%a[%a]" pp_expr a Dimension.pp_dimension d
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    | Expr_power (a, d) -> fprintf fmt "(%a^%a)" pp_expr a Dimension.pp_dimension d
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    | Expr_tuple el -> fprintf fmt "(%a)" pp_tuple el
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    | Expr_ite (c, t, e) -> fprintf fmt "(if %a then %a else %a)" pp_expr c pp_expr t pp_expr e
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    | Expr_arrow (e1, e2) -> fprintf fmt "(%a -> %a)" pp_expr e1 pp_expr e2
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    | Expr_fby (e1, e2) -> fprintf fmt "%a fby %a" pp_expr e1 pp_expr e2
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    | Expr_pre e -> fprintf fmt "pre %a" pp_expr e
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    | Expr_when (e, id, l) -> fprintf fmt "%a when %s(%s)" pp_expr e l id
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    | Expr_merge (id, hl) -> 
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      fprintf fmt "merge %s %a" id pp_handlers hl
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    | Expr_appl (id, e, r) -> pp_app fmt id e r
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    | Expr_uclock _
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    | Expr_dclock _
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    | Expr_phclock _ -> assert false
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and pp_tuple fmt el =
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 fprintf_list ~sep:"," pp_expr fmt el
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and pp_handler fmt (t, h) =
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 fprintf fmt "(%s -> %a)" t pp_expr h
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and pp_handlers fmt hl =
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 fprintf_list ~sep:" " pp_handler fmt hl
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and pp_app fmt id e r =
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  match r with
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  | None ->
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    (match id, e.expr_desc with
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    | "+", Expr_tuple([e1;e2]) -> fprintf fmt "(%a + %a)" pp_expr e1 pp_expr e2
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    | "uminus", _ -> fprintf fmt "(- %a)" pp_expr e
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    | "-", Expr_tuple([e1;e2]) -> fprintf fmt "(%a - %a)" pp_expr e1 pp_expr e2
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    | "*", Expr_tuple([e1;e2]) -> fprintf fmt "(%a * %a)" pp_expr e1 pp_expr e2
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    | "/", Expr_tuple([e1;e2]) -> fprintf fmt "(%a / %a)" pp_expr e1 pp_expr e2
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    | "mod", Expr_tuple([e1;e2]) -> fprintf fmt "(%a mod %a)" pp_expr e1 pp_expr e2
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    | "&&", Expr_tuple([e1;e2]) -> fprintf fmt "(%a and %a)" pp_expr e1 pp_expr e2
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    | "||", Expr_tuple([e1;e2]) -> fprintf fmt "(%a or %a)" pp_expr e1 pp_expr e2
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    | "xor", Expr_tuple([e1;e2]) -> fprintf fmt "(%a xor %a)" pp_expr e1 pp_expr e2
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    | "impl", Expr_tuple([e1;e2]) -> fprintf fmt "(%a => %a)" pp_expr e1 pp_expr e2
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    | "<", Expr_tuple([e1;e2]) -> fprintf fmt "(%a < %a)" pp_expr e1 pp_expr e2
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    | "<=", Expr_tuple([e1;e2]) -> fprintf fmt "(%a <= %a)" pp_expr e1 pp_expr e2
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    | ">", Expr_tuple([e1;e2]) -> fprintf fmt "(%a > %a)" pp_expr e1 pp_expr e2
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    | ">=", Expr_tuple([e1;e2]) -> fprintf fmt "(%a >= %a)" pp_expr e1 pp_expr e2
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    | "!=", Expr_tuple([e1;e2]) -> fprintf fmt "(%a != %a)" pp_expr e1 pp_expr e2
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    | "=", Expr_tuple([e1;e2]) -> fprintf fmt "(%a = %a)" pp_expr e1 pp_expr e2
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    | "not", _ -> fprintf fmt "(not %a)" pp_expr e
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    | _, Expr_tuple _ -> fprintf fmt "%s %a" id pp_expr e
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    | _ -> fprintf fmt "%s (%a)" id pp_expr e
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)
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  | Some (x, l) -> fprintf fmt "%s (%a) every %s(%s)" id pp_expr e l x 
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let pp_node_eq fmt eq = 
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  fprintf fmt "%a = %a;" 
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    pp_eq_lhs eq.eq_lhs
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    pp_expr eq.eq_rhs
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let pp_node_eqs = fprintf_list ~sep:"@ " pp_node_eq 
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let pp_node_args = fprintf_list ~sep:"; " pp_node_var 
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let pp_var_type_dec fmt ty =
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  let rec pp_var_struct_type_field fmt (label, tdesc) =
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    fprintf fmt "%a : %a" pp_var_type_dec_desc tdesc pp_print_string label
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  and pp_var_type_dec_desc fmt tdesc =
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  match tdesc with 
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    | Tydec_any -> fprintf fmt "<any>"
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    | Tydec_int -> fprintf fmt "int"
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    | Tydec_real -> fprintf fmt "real"
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    | Tydec_float -> fprintf fmt "float"
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    | Tydec_bool -> fprintf fmt "bool"
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    | Tydec_clock t -> fprintf fmt "%a clock" pp_var_type_dec_desc t
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    | Tydec_const t -> fprintf fmt "%s" t
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    | Tydec_enum id_list -> fprintf fmt "enum {%a }" (fprintf_list ~sep:", " pp_print_string) id_list
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    | Tydec_struct f_list -> fprintf fmt "struct {%a }" (fprintf_list ~sep:"; " pp_var_struct_type_field) f_list
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    | Tydec_array (s, t) -> fprintf fmt "%a^%a" pp_var_type_dec_desc t Dimension.pp_dimension s
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in pp_var_type_dec_desc fmt ty.ty_dec_desc
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(* let rec pp_var_type fmt ty =  *)
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(*   fprintf fmt "%a" (match ty.tdesc with  *)
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(*     | Tvar | Tarrow | Tlink | Tunivar -> assert false *)
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(*     | Tint -> pp_print_string fmt "int" *)
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(*     | Treal -> pp_print_string fmt "real" *)
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(*     | Tbool -> pp_print_string fmt "bool" *)
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(*     | Trat -> pp_print_string fmt "rat" *)
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(*     | Tclock -> pp_print_string fmt "clock"  *)
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(*     | Ttuple tel -> fprintf_list ~sep:" * " pp_var_type fmt tel *)
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(*   ) *)
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let pp_econst fmt c = 
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  match c with
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    | EConst_int i -> pp_print_int fmt i
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    | EConst_real r -> pp_print_string fmt r
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    | EConst_float r -> pp_print_float fmt r
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    | EConst_bool b -> pp_print_bool fmt b
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    | EConst_string s -> pp_print_string fmt ("\"" ^ s ^ "\"")
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let rec pp_eexpr fmt eexpr = 
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  match eexpr.eexpr_desc with
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    | EExpr_const c -> pp_econst fmt c
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    | EExpr_ident id -> pp_print_string fmt id
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    | EExpr_tuple el -> fprintf_list ~sep:"," pp_eexpr fmt el
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    | EExpr_arrow (e1, e2) -> fprintf fmt "%a -> %a" pp_eexpr e1 pp_eexpr e2
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    | EExpr_fby (e1, e2) -> fprintf fmt "%a fby %a" pp_eexpr e1 pp_eexpr e2
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    (* | EExpr_concat (e1, e2) -> fprintf fmt "%a::%a" pp_eexpr e1 pp_eexpr e2 *)
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    (* | EExpr_tail e -> fprintf fmt "tail %a" pp_eexpr e *)
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    | EExpr_pre e -> fprintf fmt "pre %a" pp_eexpr e
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    | EExpr_when (e, id) -> fprintf fmt "%a when %s" pp_eexpr e id
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    | EExpr_merge (id, e1, e2) -> 
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      fprintf fmt "merge (%s, %a, %a)" id pp_eexpr e1 pp_eexpr e2
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    | EExpr_appl (id, e, r) -> pp_eapp fmt id e r
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    | EExpr_forall (vars, e) -> fprintf fmt "forall %a; %a" pp_node_args vars pp_eexpr e 
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    | EExpr_exists (vars, e) -> fprintf fmt "exists %a; %a" pp_node_args vars pp_eexpr e 
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    (* | EExpr_whennot _ *)
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    (* | EExpr_uclock _ *)
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    (* | EExpr_dclock _ *)
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    (* | EExpr_phclock _ -> assert false *)
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and pp_eapp fmt id e r =
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  match r with
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  | None ->
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    (match id, e.eexpr_desc with
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    | "+", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a + %a)" pp_eexpr e1 pp_eexpr e2
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    | "uminus", _ -> fprintf fmt "(- %a)" pp_eexpr e
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    | "-", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a - %a)" pp_eexpr e1 pp_eexpr e2
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    | "*", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a * %a)" pp_eexpr e1 pp_eexpr e2
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    | "/", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a / %a)" pp_eexpr e1 pp_eexpr e2
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    | "mod", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a mod %a)" pp_eexpr e1 pp_eexpr e2
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    | "&&", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a && %a)" pp_eexpr e1 pp_eexpr e2
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    | "||", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a || %a)" pp_eexpr e1 pp_eexpr e2
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    | "xor", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a ^^ %a)" pp_eexpr e1 pp_eexpr e2
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    | "impl", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a ==> %a)" pp_eexpr e1 pp_eexpr e2
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    | "<", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a < %a)" pp_eexpr e1 pp_eexpr e2
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    | "<=", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a <= %a)" pp_eexpr e1 pp_eexpr e2
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    | ">", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a > %a)" pp_eexpr e1 pp_eexpr e2
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    | ">=", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a >= %a)" pp_eexpr e1 pp_eexpr e2
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    | "!=", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a != %a)" pp_eexpr e1 pp_eexpr e2
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    | "=", EExpr_tuple([e1;e2]) -> fprintf fmt "(%a == %a)" pp_eexpr e1 pp_eexpr e2
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    | "not", _ -> fprintf fmt "(! %a)" pp_eexpr e
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    | "ite", EExpr_tuple([e1;e2;e3]) -> fprintf fmt "(if %a then %a else %a)" pp_eexpr e1 pp_eexpr e2 pp_eexpr e3
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    | _ -> fprintf fmt "%s (%a)" id pp_eexpr e)
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  | Some x -> fprintf fmt "%s (%a) every %s" id pp_eexpr e x 
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let pp_ensures fmt e =
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  match e with
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    | EnsuresExpr e -> fprintf fmt "ensures %a;@ " pp_eexpr e
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    | SpecObserverNode (name, args) -> fprintf fmt "observer %s (%a);@ " name (fprintf_list ~sep:", " pp_eexpr) args
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let pp_spec fmt spec =
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  fprintf fmt "@[<hov 2>(*@@ ";
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  fprintf_list ~sep:"" (fun fmt r -> fprintf fmt "requires %a;@ " pp_eexpr r) fmt spec.requires;
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  fprintf_list ~sep:"" pp_ensures fmt spec.ensures;
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  fprintf_list ~sep:"@ " (fun fmt (name, assumes, requires) -> 
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    fprintf fmt "behavior %s:@[@ %a@ %a@]" 
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      name
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      (fprintf_list ~sep:"@ " (fun fmt r -> fprintf fmt "assumes %a;" pp_eexpr r)) assumes
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      (fprintf_list ~sep:"@ " pp_ensures) requires
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  ) fmt spec.behaviors;
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  fprintf fmt "@]*)";
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  ()
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let pp_node fmt nd = 
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fprintf fmt "@[<v 0>%a%t%s %s (%a) returns (%a)@.%a%alet@.@[<h 2>   @ @[%a@]@ @]@.tel@]@."
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  (fun fmt s -> match s with Some s -> pp_spec fmt s | _ -> ()) nd.node_spec
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  (fun fmt -> match nd.node_spec with None -> () | Some _ -> Format.fprintf fmt "@.")
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  (if nd.node_dec_stateless then "function" else "node")
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  nd.node_id
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  pp_node_args nd.node_inputs
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  pp_node_args nd.node_outputs
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  (fun fmt locals ->
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  match locals with [] -> () | _ ->
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    fprintf fmt "@[<v 4>var %a@]@ " 
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      (fprintf_list ~sep:"@ " 
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	 (fun fmt v -> fprintf fmt "%a;" pp_node_var v))
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      locals
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  ) nd.node_locals
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  (fun fmt checks ->
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  match checks with [] -> () | _ ->
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    fprintf fmt "@[<v 4>check@ %a@]@ " 
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      (fprintf_list ~sep:"@ " 
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	 (fun fmt d -> fprintf fmt "%a" Dimension.pp_dimension d))
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      checks
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  ) nd.node_checks
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  pp_node_eqs nd.node_eqs
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(*fprintf fmt "@ /* Scheduling: %a */ @ " (fprintf_list ~sep:", " pp_print_string) (Scheduling.schedule_node nd)*)
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let pp_imported_node fmt ind = 
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  fprintf fmt "@[<v>%s %s (%a) returns (%a) %t@]"
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    (if ind.nodei_stateless then "function" else "node")
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    ind.nodei_id
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    pp_node_args ind.nodei_inputs
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    pp_node_args ind.nodei_outputs
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    (fun fmt -> if ind.nodei_stateless then Format.fprintf fmt "stateless") 
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let pp_decl fmt decl =
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  match decl.top_decl_desc with
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  | Node nd -> fprintf fmt "%a@ " pp_node nd
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  | ImportedNode ind ->
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    fprintf fmt "imported %a;@ " pp_imported_node ind
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  | Consts clist -> (
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    fprintf fmt "const %a@ " 
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      (fprintf_list ~sep:"@ " (fun fmt cdecl ->
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	fprintf fmt "%s = %a;"
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	  cdecl.const_id pp_const cdecl.const_value)) clist)
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  | Open s -> fprintf fmt "open \"%s\"" s
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let pp_prog fmt prog = 
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  fprintf_list ~sep:"@ " pp_decl fmt prog
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let pp_short_decl fmt decl =
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  match decl.top_decl_desc with
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  | Node nd -> fprintf fmt "node %s@ " nd.node_id
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  | ImportedNode ind -> fprintf fmt "imported node %s" ind.nodei_id
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  | Consts clist -> (
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    fprintf fmt "const %a@ " 
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      (fprintf_list ~sep:"@ " (fun fmt cdecl ->
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	pp_print_string fmt cdecl.const_id)) clist)
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  | Open s -> fprintf fmt "open \"%s\"" s
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let pp_lusi fmt decl = 
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  match decl.top_decl_desc with
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  | Node nd ->  
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    fprintf fmt 
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      "@[<v>%s %s (%a) returns (%a);@ @]@ "
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      (if Stateless.check_node decl then "function" else "node")
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      nd.node_id
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      pp_node_args nd.node_inputs
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      pp_node_args nd.node_outputs
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  | ImportedNode _ | Consts _ | Open _ -> ()
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let pp_lusi_header fmt filename prog =
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  fprintf fmt "(* Generated Lustre Interface file from %s *)@." filename;
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  fprintf fmt "(* generated by Lustre-C compiler version %s, %a *)@." Version.number pp_date (Unix.gmtime (Unix.time ()));
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  fprintf fmt "(* feel free to mask some of the nodes by removing them from this file. *)@.@.";
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  List.iter (fprintf fmt "%a@." pp_lusi) prog    
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(* Local Variables: *)
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(* compile-command:"make -C .." *)
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(* End: *)