%% -*- mode: erlang; tab-width: 4; indent-tabs-mode: 1; st-rulers: [70] -*-
%% vim: ts=4 sw=4 ft=erlang noet
%%%-------------------------------------------------------------------
%%% @author Andrew Bennett <potatosaladx@gmail.com>
%%% @copyright 2015-2022, Andrew Bennett
%%% @doc
%%%
%%% @end
%%% Created :  30 Aug 2022 by Andrew Bennett <potatosaladx@gmail.com>
%%%-------------------------------------------------------------------
-module(libsodium_crypto_secretbox_xchacha20poly1305).

-define(NAMESPACE, crypto_secretbox_xchacha20poly1305).

%% API
-export([keybytes/0]).
-export([noncebytes/0]).
-export([macbytes/0]).
-export([messagebytes_max/0]).
-export([easy/3]).
-export([open_easy/3]).
-export([detached/3]).
-export([open_detached/4]).

%% Internal API
-export([call/1]).
-export([call/2]).

%%%===================================================================
%%% API
%%%===================================================================

keybytes() ->
	call(keybytes).

noncebytes() ->
	call(noncebytes).

macbytes() ->
	call(macbytes).

messagebytes_max() ->
	call(messagebytes_max).

easy(M, N, K)
		when is_binary(M)
		andalso is_binary(N)
		andalso is_binary(K) ->
	call(easy, {M, N, K}).

open_easy(C, N, K)
		when is_binary(C)
		andalso is_binary(N)
		andalso is_binary(K) ->
	call(open_easy, {C, N, K}).

detached(M, N, K)
		when is_binary(M)
		andalso is_binary(N)
		andalso is_binary(K) ->
	call(detached, {M, N, K}).

open_detached(C, MAC, N, K)
		when is_binary(C)
		andalso is_binary(MAC)
		andalso is_binary(N)
		andalso is_binary(K) ->
	call(open_detached, {C, MAC, N, K}).

%%%-------------------------------------------------------------------
%%% Internal functions
%%%-------------------------------------------------------------------

%% @private
call(Function) when is_atom(Function) ->
	call(Function, {}).

%% @private
call(Function, Arguments) when is_atom(Function) andalso is_tuple(Arguments) ->
	libsodium:call(?NAMESPACE, Function, Arguments).