-module(ywt@algorithm).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/ywt/algorithm.gleam").
-export([decoder/0, to_json/1, digest_type/1, padding/1, generate_key/4]).
-export_type([algorithm/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.

-opaque algorithm() :: hs256 |
    hs384 |
    hs512 |
    es256 |
    es384 |
    es512 |
    rs256 |
    rs384 |
    rs512 |
    ps256 |
    ps384 |
    ps512.

-file("src/ywt/algorithm.gleam", 81).
?DOC(false).
-spec decoder() -> gleam@dynamic@decode:decoder(algorithm()).
decoder() ->
    gleam@dynamic@decode:then(
        {decoder, fun gleam@dynamic@decode:decode_string/1},
        fun(Variant) -> case Variant of
                <<"HS256"/utf8>> ->
                    gleam@dynamic@decode:success(hs256);

                <<"HS384"/utf8>> ->
                    gleam@dynamic@decode:success(hs384);

                <<"HS512"/utf8>> ->
                    gleam@dynamic@decode:success(hs512);

                <<"ES256"/utf8>> ->
                    gleam@dynamic@decode:success(es256);

                <<"ES384"/utf8>> ->
                    gleam@dynamic@decode:success(es384);

                <<"ES512"/utf8>> ->
                    gleam@dynamic@decode:success(es512);

                <<"RS256"/utf8>> ->
                    gleam@dynamic@decode:success(rs256);

                <<"RS384"/utf8>> ->
                    gleam@dynamic@decode:success(rs384);

                <<"RS512"/utf8>> ->
                    gleam@dynamic@decode:success(rs512);

                <<"PS256"/utf8>> ->
                    gleam@dynamic@decode:success(ps256);

                <<"PS384"/utf8>> ->
                    gleam@dynamic@decode:success(ps384);

                <<"PS512"/utf8>> ->
                    gleam@dynamic@decode:success(ps512);

                _ ->
                    gleam@dynamic@decode:failure(hs256, <<"alg"/utf8>>)
            end end
    ).

-file("src/ywt/algorithm.gleam", 101).
?DOC(false).
-spec to_json(algorithm()) -> gleam@json:json().
to_json(Alg) ->
    case Alg of
        hs256 ->
            gleam@json:string(<<"HS256"/utf8>>);

        hs384 ->
            gleam@json:string(<<"HS384"/utf8>>);

        hs512 ->
            gleam@json:string(<<"HS512"/utf8>>);

        es256 ->
            gleam@json:string(<<"ES256"/utf8>>);

        es384 ->
            gleam@json:string(<<"ES384"/utf8>>);

        es512 ->
            gleam@json:string(<<"ES512"/utf8>>);

        rs256 ->
            gleam@json:string(<<"RS256"/utf8>>);

        rs384 ->
            gleam@json:string(<<"RS384"/utf8>>);

        rs512 ->
            gleam@json:string(<<"RS512"/utf8>>);

        ps256 ->
            gleam@json:string(<<"PS256"/utf8>>);

        ps384 ->
            gleam@json:string(<<"PS384"/utf8>>);

        ps512 ->
            gleam@json:string(<<"PS512"/utf8>>)
    end.

-file("src/ywt/algorithm.gleam", 119).
?DOC(false).
-spec digest_type(algorithm()) -> ywt@internal@core:digest_type().
digest_type(Alg) ->
    case Alg of
        hs256 ->
            sha256;

        es256 ->
            sha256;

        rs256 ->
            sha256;

        ps256 ->
            sha256;

        hs384 ->
            sha384;

        es384 ->
            sha384;

        rs384 ->
            sha384;

        ps384 ->
            sha384;

        hs512 ->
            sha512;

        es512 ->
            sha512;

        rs512 ->
            sha512;

        ps512 ->
            sha512
    end.

-file("src/ywt/algorithm.gleam", 128).
?DOC(false).
-spec padding(algorithm()) -> {ok, ywt@internal@core:padding()} | {error, nil}.
padding(Alg) ->
    case Alg of
        rs256 ->
            {ok, rsa_pkcs1_padding};

        rs384 ->
            {ok, rsa_pkcs1_padding};

        rs512 ->
            {ok, rsa_pkcs1_padding};

        ps256 ->
            {ok, rsa_pkcs1_pss_padding};

        ps384 ->
            {ok, rsa_pkcs1_pss_padding};

        ps512 ->
            {ok, rsa_pkcs1_pss_padding};

        _ ->
            {error, nil}
    end.

-file("src/ywt/algorithm.gleam", 137).
?DOC(false).
-spec generate_key(
    algorithm(),
    fun((ywt@internal@core:digest_type()) -> EIX),
    fun((ywt@internal@core:named_curve(), ywt@internal@core:digest_type()) -> EIX),
    fun((ywt@internal@core:digest_type(), integer(), ywt@internal@core:padding()) -> EIX)
) -> EIX.
generate_key(Alg, Generate_hmac, Generate_ecdsa, Generate_rsa) ->
    case Alg of
        es256 ->
            Generate_ecdsa(secp256r1, sha256);

        es384 ->
            Generate_ecdsa(secp384r1, sha384);

        es512 ->
            Generate_ecdsa(secp521r1, sha512);

        hs256 ->
            Generate_hmac(sha256);

        hs384 ->
            Generate_hmac(sha384);

        hs512 ->
            Generate_hmac(sha512);

        ps256 ->
            Generate_rsa(sha256, 4096, rsa_pkcs1_pss_padding);

        ps384 ->
            Generate_rsa(sha384, 4096, rsa_pkcs1_pss_padding);

        ps512 ->
            Generate_rsa(sha512, 4096, rsa_pkcs1_pss_padding);

        rs256 ->
            Generate_rsa(sha256, 4096, rsa_pkcs1_padding);

        rs384 ->
            Generate_rsa(sha384, 4096, rsa_pkcs1_padding);

        rs512 ->
            Generate_rsa(sha512, 4096, rsa_pkcs1_padding)
    end.