-module(touch_grass@cryptography@hash).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/touch_grass/cryptography/hash.gleam").
-export([decode/1, encode/1]).
-export_type([algorithm/0, input/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(" Computes a cryptographic digest of a binary.\n").

-type algorithm() :: sha256.

-type input() :: {input, algorithm(), bitstring()}.

-file("src/touch_grass/cryptography/hash.gleam", 21).
-spec decode_algorithm(eyg@interpreter@value:value(PSS, PST)) -> {ok,
        algorithm()} |
    {error, eyg@interpreter@break:reason(PSS, PST)}.
decode_algorithm(Value) ->
    eyg@interpreter@cast:as_varient(
        Value,
        [{<<"SHA256"/utf8>>,
                fun(_capture) ->
                    eyg@interpreter@cast:as_unit(_capture, sha256)
                end}]
    ).

-file("src/touch_grass/cryptography/hash.gleam", 15).
-spec decode(eyg@interpreter@value:value(PTB, PTC)) -> {ok, input()} |
    {error, eyg@interpreter@break:reason(PTB, PTC)}.
decode(Lift) ->
    gleam@result:'try'(
        eyg@interpreter@cast:field(
            <<"algorithm"/utf8>>,
            fun decode_algorithm/1,
            Lift
        ),
        fun(Algorithm) ->
            gleam@result:'try'(
                eyg@interpreter@cast:field(
                    <<"bytes"/utf8>>,
                    fun eyg@interpreter@cast:as_binary/1,
                    Lift
                ),
                fun(Bytes) -> {ok, {input, Algorithm, Bytes}} end
            )
        end
    ).

-file("src/touch_grass/cryptography/hash.gleam", 25).
-spec encode(bitstring()) -> eyg@interpreter@value:value(any(), any()).
encode(Digest) ->
    {binary, Digest}.