%% @author Robert Lasu
%% @copyright 2022 Robert Lasu
%% @doc A simple bencode decoder and encoder.

%% ----------------------------------
%%      This is the API to use
%% ----------------------------------

-module(bencode).
-include_lib("eunit/include/eunit.hrl").

-ifdef(TEST).
-compile(export_all).
-endif.

-export([encode/1, decode/1]).

%% @doc Encodes `Value' to Bencode.
%% @end
-spec encode(Value) -> {ok, Encoded} | {error, Reason} | {warning, Reason, Encoded} when
    Value       :: map() | list() | string() | integer() | tuple() | atom(),
    Encoded     :: list(),
    Reason      :: atom().
%% @doc             Encodes the `Value' provided to bencode
%% @param           `Value' - can be either a map(), list(), string(), integer(), tuple() or atom()
%% @return          Return - the bencode representation of `Value'
%% @throws          Throws - {error, Reason} or {warning, Reason, Encoded}
encode(Value) -> encode:'_encode'(Value).

-spec decode(Value) -> {ok, Decoded} | {error, Reason} | {warning, Reason, Decoded} when
    Value           :: list() | atom(),
    Decoded         :: map() | list() | string() | integer() | atom(),
    Reason          :: atom().
%% @doc             Takes a bencode string and convert it to a erlang term.
%%                  Even Erlang specific terms is supported such as atoms and tuples.
%%                  If `Value' is an atom() it's considerd to be a file path.
%%                  If `Value' is a list() it's considerd to be a bencode string
%% @param           `Value' - a bencode string
%% @return          Return - a Erlang term represented by `Value'. Can be
%%                           either a map(), list(), string(), integer(), tuple() or atom().
%% @throws          Throws - {error, Reason} or {warning, Reason, Encoded}
decode(Value) -> decode:'_decode'(Value).