module Ast = Spice_syntax.Ast
module Code = Spice_runtime.Code
module Value = Spice_runtime.Value

open Spice_syntax
open Spice_runtime
open Spice_compile

exception Error of string

let failf f =
  Fmt.kstr (fun s -> raise (Error s)) f

let parse input =
  let lexbuf = Lexing.from_string input ~with_positions:true in
  try Parser.modl Lexer.read lexbuf
  with
  | Parser.Error -> failf "syntax error"
  | Lexer.Error msg -> failf "syntax error: %s" msg

type program =
  { main : Code.funct }

let compile ast =
  try
    {
      main =
        Ir.lower ast ~lib:Std.lib
        |> Bcc.compile_lambda
    }
  with Ir.Error msg ->
    failf "compile error: %s" msg

let run { main } =
  try
    let lib = Value.native_lib Std.lib in
    let args = [] in
    Interp.run main lib args
  with Interp.Runtime_error msg ->
    failf "runtime error: %s" msg