-module(apiculture@key).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/apiculture/key.gleam").
-export([new/0, with_random_bytes/2, with_random_chars/2, with_alphabet/2, with_encoding/2, with_prefix/2, with_separator/2, with_checksum/2, with_checksum_bytes/2, without_checksum/1, generate/1, value/1, bytes/1]).
-export_type([key_config/0, key/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.

-type key_config() :: {key_config,
        gleam@option:option(integer()),
        gleam@option:option(integer()),
        gleam@option:option(apiculture@alphabet:alphabet()),
        gleam@option:option(apiculture@encoding:encoding()),
        gleam@option:option(binary()),
        gleam@option:option(binary()),
        gleam@option:option(apiculture@checksum:checksum()),
        gleam@option:option(integer())}.

-type key() :: {key, binary(), bitstring()}.

-file("src/apiculture/key.gleam", 35).
-spec new() -> key_config().
new() ->
    {key_config, none, none, none, none, none, none, none, none}.

-file("src/apiculture/key.gleam", 48).
-spec with_random_bytes(key_config(), integer()) -> key_config().
with_random_bytes(Config, Count) ->
    {key_config,
        {some, Count},
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 52).
-spec with_random_chars(key_config(), integer()) -> key_config().
with_random_chars(Config, Count) ->
    {key_config,
        erlang:element(2, Config),
        {some, Count},
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 56).
-spec with_alphabet(key_config(), apiculture@alphabet:alphabet()) -> key_config().
with_alphabet(Config, Alphabet) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        {some, Alphabet},
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 60).
-spec with_encoding(key_config(), apiculture@encoding:encoding()) -> key_config().
with_encoding(Config, Encoding) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        {some, Encoding},
        erlang:element(6, Config),
        erlang:element(7, Config),
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 64).
-spec with_prefix(key_config(), binary()) -> key_config().
with_prefix(Config, Prefix) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        {some, Prefix},
        erlang:element(7, Config),
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 68).
-spec with_separator(key_config(), binary()) -> key_config().
with_separator(Config, Separator) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        {some, Separator},
        erlang:element(8, Config),
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 72).
-spec with_checksum(key_config(), apiculture@checksum:checksum()) -> key_config().
with_checksum(Config, Checksum) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        {some, Checksum},
        erlang:element(9, Config)}.

-file("src/apiculture/key.gleam", 76).
-spec with_checksum_bytes(key_config(), integer()) -> key_config().
with_checksum_bytes(Config, Count) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        erlang:element(8, Config),
        {some, Count}}.

-file("src/apiculture/key.gleam", 80).
-spec without_checksum(key_config()) -> key_config().
without_checksum(Config) ->
    {key_config,
        erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config),
        erlang:element(6, Config),
        erlang:element(7, Config),
        none,
        none}.

-file("src/apiculture/key.gleam", 239).
-spec hex_digit(integer()) -> binary().
hex_digit(Nibble) ->
    case Nibble of
        0 ->
            <<"0"/utf8>>;

        1 ->
            <<"1"/utf8>>;

        2 ->
            <<"2"/utf8>>;

        3 ->
            <<"3"/utf8>>;

        4 ->
            <<"4"/utf8>>;

        5 ->
            <<"5"/utf8>>;

        6 ->
            <<"6"/utf8>>;

        7 ->
            <<"7"/utf8>>;

        8 ->
            <<"8"/utf8>>;

        9 ->
            <<"9"/utf8>>;

        10 ->
            <<"a"/utf8>>;

        11 ->
            <<"b"/utf8>>;

        12 ->
            <<"c"/utf8>>;

        13 ->
            <<"d"/utf8>>;

        14 ->
            <<"e"/utf8>>;

        15 ->
            <<"f"/utf8>>;

        _ ->
            <<""/utf8>>
    end.

-file("src/apiculture/key.gleam", 233).
-spec int_to_hex(integer()) -> binary().
int_to_hex(Byte) ->
    Nibble_high = Byte div 16,
    Nibble_low = Byte rem 16,
    <<(hex_digit(Nibble_high))/binary, (hex_digit(Nibble_low))/binary>>.

-file("src/apiculture/key.gleam", 222).
-spec do_bytes_to_hex(bitstring(), list(binary())) -> list(binary()).
do_bytes_to_hex(Bytes, Acc) ->
    case Bytes of
        <<>> ->
            Acc;

        <<Byte, Rest/bitstring>> ->
            Hex = int_to_hex(Byte),
            do_bytes_to_hex(Rest, [Hex | Acc]);

        _ ->
            Acc
    end.

-file("src/apiculture/key.gleam", 215).
-spec bytes_to_hex(bitstring()) -> binary().
bytes_to_hex(Bytes) ->
    _pipe = Bytes,
    _pipe@1 = do_bytes_to_hex(_pipe, []),
    _pipe@2 = lists:reverse(_pipe@1),
    erlang:list_to_binary(_pipe@2).

-file("src/apiculture/key.gleam", 141).
-spec encode_bytes_with_config(bitstring(), key_config()) -> binary().
encode_bytes_with_config(Bytes, Config) ->
    case erlang:element(5, Config) of
        {some, Enc} ->
            apiculture@encoding:encode(Enc, Bytes);

        none ->
            bytes_to_hex(Bytes)
    end.

-file("src/apiculture/key.gleam", 93).
-spec generate_from_bytes(key_config()) -> {ok, key()} |
    {error, apiculture@error:error()}.
generate_from_bytes(Config) ->
    case erlang:element(2, Config) of
        {some, Byte_count} ->
            case apiculture@random:random_bytes(Byte_count) of
                {ok, Bytes} ->
                    Encoded = encode_bytes_with_config(Bytes, Config),
                    {ok, {key, Encoded, Bytes}};

                {error, E} ->
                    {error, E}
            end;

        none ->
            {error, invalid_byte_count}
    end.

-file("src/apiculture/key.gleam", 188).
-spec encode_checksum(bitstring(), key_config()) -> binary().
encode_checksum(Crc_bytes, Config) ->
    case erlang:element(5, Config) of
        {some, Enc} ->
            apiculture@encoding:encode(Enc, Crc_bytes);

        none ->
            bytes_to_hex(Crc_bytes)
    end.

-file("src/apiculture/key.gleam", 176).
-spec drop_first_bytes(bitstring(), integer()) -> bitstring().
drop_first_bytes(Bytes, N) ->
    case N of
        0 ->
            Bytes;

        _ ->
            case Bytes of
                <<_, Rest/binary>> ->
                    drop_first_bytes(Rest, N - 1);

                _ ->
                    <<>>
            end
    end.

-file("src/apiculture/key.gleam", 169).
-spec truncate_checksum(bitstring(), gleam@option:option(integer())) -> bitstring().
truncate_checksum(Bytes, Byte_count) ->
    case Byte_count of
        {some, Count} ->
            drop_first_bytes(Bytes, erlang:byte_size(Bytes) - Count);

        none ->
            Bytes
    end.

-file("src/apiculture/key.gleam", 148).
-spec format_key(binary(), bitstring(), key_config()) -> binary().
format_key(Content, Bytes, Config) ->
    Prefixed = case erlang:element(6, Config) of
        {some, Prefix} ->
            Sep = begin
                _pipe = erlang:element(7, Config),
                gleam@option:unwrap(_pipe, <<""/utf8>>)
            end,
            <<<<Prefix/binary, Sep/binary>>/binary, Content/binary>>;

        none ->
            Content
    end,
    case erlang:element(8, Config) of
        {some, Chk} ->
            Checksum = (erlang:element(2, Chk))(Bytes),
            Checksum_truncated = truncate_checksum(
                Checksum,
                erlang:element(9, Config)
            ),
            Checksum_encoded = encode_checksum(Checksum_truncated, Config),
            <<Prefixed/binary, Checksum_encoded/binary>>;

        none ->
            Prefixed
    end.

-file("src/apiculture/key.gleam", 125).
-spec generate_from_encoding(key_config()) -> {ok, key()} |
    {error, apiculture@error:error()}.
generate_from_encoding(Config) ->
    case {erlang:element(2, Config), erlang:element(5, Config)} of
        {{some, Byte_count}, {some, Encoding}} ->
            case apiculture@random:random_bytes(Byte_count) of
                {ok, Bytes} ->
                    Encoded = apiculture@encoding:encode(Encoding, Bytes),
                    Formatted = format_key(Encoded, Bytes, Config),
                    {ok, {key, Formatted, Bytes}};

                {error, E} ->
                    {error, E}
            end;

        {_, _} ->
            {error, invalid_byte_count}
    end.

-file("src/apiculture/key.gleam", 207).
-spec get_nth(integer(), list(binary())) -> binary().
get_nth(N, Items) ->
    case {N, Items} of
        {0, [First | _]} ->
            First;

        {_, [_ | Rest]} ->
            get_nth(N - 1, Rest);

        {_, []} ->
            <<""/utf8>>
    end.

-file("src/apiculture/key.gleam", 195).
-spec chars_from_indices(list(integer()), apiculture@alphabet:alphabet()) -> binary().
chars_from_indices(Indices, Alphabet) ->
    Char_list = apiculture@alphabet:characters(Alphabet),
    _pipe = Indices,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(Index) ->
            case (Index >= 0) andalso (Index < erlang:length(Char_list)) of
                true ->
                    get_nth(Index, Char_list);

                false ->
                    <<""/utf8>>
            end
        end
    ),
    erlang:list_to_binary(_pipe@1).

-file("src/apiculture/key.gleam", 108).
-spec generate_from_alphabet(key_config()) -> {ok, key()} |
    {error, apiculture@error:error()}.
generate_from_alphabet(Config) ->
    case {erlang:element(3, Config), erlang:element(4, Config)} of
        {{some, Char_count}, {some, Alphabet}} ->
            case apiculture@random:random_chars(Alphabet, Char_count) of
                {ok, Indices} ->
                    Chars = chars_from_indices(Indices, Alphabet),
                    Bytes = gleam_stdlib:identity(Chars),
                    Formatted = format_key(Chars, Bytes, Config),
                    {ok, {key, Formatted, Bytes}};

                {error, E} ->
                    {error, E}
            end;

        {_, _} ->
            {error, invalid_byte_count}
    end.

-file("src/apiculture/key.gleam", 84).
-spec generate(key_config()) -> {ok, key()} | {error, apiculture@error:error()}.
generate(Config) ->
    case {erlang:element(2, Config),
        erlang:element(3, Config),
        erlang:element(4, Config),
        erlang:element(5, Config)} of
        {none, {some, _}, {some, _}, none} ->
            generate_from_alphabet(Config);

        {{some, _}, none, none, {some, _}} ->
            generate_from_encoding(Config);

        {{some, _}, none, none, none} ->
            generate_from_bytes(Config);

        {_, _, _, _} ->
            {error, invalid_byte_count}
    end.

-file("src/apiculture/key.gleam", 262).
?DOC(" Returns the string value of the key.\n").
-spec value(key()) -> binary().
value(Key) ->
    erlang:element(2, Key).

-file("src/apiculture/key.gleam", 267).
?DOC(" Returns the raw bytes that were used to generate the key.\n").
-spec bytes(key()) -> bitstring().
bytes(Key) ->
    erlang:element(3, Key).