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(* Open Source License                                                       *)
(* Copyright (c) 2022 TriliTech <contact@trili.tech>                         *)
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(* For documentation please refer to the [Tezos_wasmer] module. *)

open Utils
open Api

let make_features () =
  let open Functions.Wasmer.Features in
  let features = new_ () in
  (* These features map to proposals in the WebAssembly spec. They must be kept
     in sync with the features available through Octez' WebAssembly interpreter
     (tezos-webassembly-interpreter). *)
  ignore (bulk_memory features false : bool) ;
  ignore (memory64 features false : bool) ;
  ignore (module_linking features false : bool) ;
  ignore (multi_memory features false : bool) ;
  ignore (multi_value features false : bool) ;
  ignore (reference_types features true : bool) ;
  ignore (simd features true : bool) ;
  ignore (tail_call features false : bool) ;
  ignore (threads features false : bool) ;
  features

type compiler = Types.Wasmer.Compiler.t = CRANELIFT | LLVM | SINGLEPASS

let is_compiler_available = Functions.Wasmer.Compiler.is_available

exception Compiler_unavailable of compiler

type t = {compiler : compiler}

let default = {compiler = SINGLEPASS}

let to_owned desc =
  let conf = Functions.Config.new_ () in
  check_null_ptr Error.(make_exception Create_configuration) conf ;
  let has_compiler = is_compiler_available desc.compiler in
  if not has_compiler then raise (Compiler_unavailable desc.compiler) ;
  Functions.Config.set_compiler conf desc.compiler ;
  Functions.Config.set_features conf (make_features ()) ;
  conf