(**************************************************************************)
(*                                                                        *)
(*    Copyright (c) 2014 - 2016.                                          *)
(*    Dynamic Ledger Solutions, Inc. <contact@tezos.com>                  *)
(*                                                                        *)
(*    All rights reserved. No warranty, explicit or implicit, provided.   *)
(*                                                                        *)
(**************************************************************************)

include Assert

open Proto_alpha.Tezos_context

let wrap_result = Proto_alpha.Environment.wrap_error

let wrap = fun x -> Lwt.return @@ wrap_result x

let (>>=??) x y = x >>= wrap >>=? y

let (>>??) x y = wrap_result x >>? y

let (>>?=) x y = x >>= wrap >>= y

open Proto_alpha.Error_monad

let tmp_map f lst =
  let rec aux acc = function
    | [] -> ok acc
    | hd :: tl ->
        f hd >>? fun fhd -> (aux (fhd :: acc) tl)
  in
  aux [] lst


let ok ?msg = function
  | Ok x -> return x
  | Error errs ->
      Helpers_logger.log_error "Error : %a" pp @@ List.hd errs ;
      Assert.is_true ~msg:(Option.unopt ~default:"not ok" msg) false ;
      fail @@ List.hd errs


let ok_contract ?msg x =
  ok x >>=? fun (((_, errs), _) as x) ->
  Assert.is_none ?msg errs ;
  return x


exception No_error

let no_error ?msg = function
  | Ok x -> x
  | Error _ ->
      Assert.is_true
        ~msg: (Option.unopt ~default:"yes error" msg)
        false ;
      raise No_error


let equal_pkh ?msg pkh1 pkh2 =
  let msg = Assert.format_msg msg in
  let eq pkh1 pkh2 =
    match pkh1, pkh2 with
    | None, None -> true
    | Some pkh1, Some pkh2 ->
        Ed25519.Public_key_hash.equal pkh1 pkh2
    | _ -> false in
  let prn = function
    | None -> "none"
    | Some pkh -> Ed25519.Public_key_hash.to_hex pkh in
  Assert.equal ?msg ~prn ~eq pkh1 pkh2

let equal_int64 ?msg =
  Assert.equal
    ~eq: Int64.equal
    ~prn: Int64.to_string
    ~msg: (Option.unopt ~default:"int64_equal" msg)


let equal_int ?msg =
  Assert.equal
    ~eq: (=)
    ~prn: string_of_int
    ~msg: (Option.unopt ~default:"int_equal" msg)



let equal_tez ?msg =
  Assert.equal
    ~eq: Tez .(=)
    ~prn: Tez.to_string
    ~msg: (Option.unopt ~default:"tez_equal" msg)


let equal_balance ~tc ?msg (contract, expected_balance) =
  Contract.get_balance tc contract >>=? fun balance ->
  return @@
  equal_tez
    expected_balance balance
    ~msg: (Option.unopt ~default:"balance_equal" msg)


let equal_cents_balance ~tc ?msg (contract, cents_balance) =
  equal_balance
    ~tc
    ~msg: (Option.unopt ~default:"equal_cents_balance" msg)
    (contract, Helpers_cast.cents_of_int cents_balance)


let ecoproto_error f = function
  | Proto_alpha.Environment.Ecoproto_error errors ->
      List.exists f errors
  | _ -> false


let generic_economic_error ~msg =
  Assert.contain_error ~msg ~f: (ecoproto_error (fun _ -> true))

let economic_error ~msg f =
  Assert.contain_error ~msg ~f: (ecoproto_error f)

let ill_typed_data_error ~msg =
  let aux = function
    | Proto_alpha.Script_ir_translator.Ill_typed_data _ -> true
    | _ -> false in
  economic_error ~msg aux

let ill_typed_return_error ~msg =
  let aux = function
    | Proto_alpha.Script_ir_translator.Bad_return _ -> true
    | _ -> false in
  economic_error ~msg aux

let double_endorsement ~msg =
  let aux = function
    | Proto_alpha.Apply.Duplicate_endorsement(_) -> true
    | _ -> false
  in
  economic_error ~msg aux

let contain_error_alpha ?msg ~f = function
  | Ok _ -> ()
  | Error errs ->
      if (not @@ List.exists f errs)
      then Assert.is_true
          ~msg:(Option.unopt ~default:"yes error" msg) false


let unknown_contract ~msg =
  let f = function
    | Proto_alpha.Raw_context.Storage_error _ -> true
    | _ -> false
  in
  contain_error_alpha ~msg ~f


let non_existing_contract ~msg =
  contain_error_alpha ~msg ~f: (function
      | Proto_alpha.Contract_storage.Non_existing_contract _ -> true
      | _ -> false)


let balance_too_low ~msg =
  contain_error_alpha ~msg ~f: (function
      | Contract.Balance_too_low _ -> true
      | _ -> false)


let non_spendable ~msg =
  Assert.contain_error ~msg ~f: begin ecoproto_error (function
      | Proto_alpha.Contract_storage.Unspendable_contract _ -> true
      | error ->
          Helpers_logger.debug "Actual error: %a" pp error ;
          false)
  end

let inconsistent_pkh ~msg =
  Assert.contain_error ~msg ~f: begin ecoproto_error (function
      | Proto_alpha.Contract_storage.Inconsistent_hash _ -> true
      | _ -> false)
  end

let initial_amount_too_low ~msg =
  Assert.contain_error ~msg ~f: begin ecoproto_error (function
      | Contract.Initial_amount_too_low _ -> true
      | _ -> false)
  end

let non_delegatable ~msg =
  Assert.contain_error ~msg ~f: begin ecoproto_error (function
      | Proto_alpha.Contract_storage.Non_delegatable_contract _ -> true
      | _ -> false)
  end

let wrong_delegate ~msg =
  Assert.contain_error ~msg ~f: begin ecoproto_error (function
      | Proto_alpha.Baking.Wrong_delegate _ -> true
      | _ -> false)
  end