-module(kdleam@number).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/kdleam/number.gleam").
-export([parse_keyword_number/1, parse_number/1]).

-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(false).

-file("src/kdleam/number.gleam", 13).
?DOC(false).
-spec parse_keyword_number(kdleam@scanner:scanner()) -> {ok,
        {gleam@option:option(kdleam@document:kdl_number()),
            kdleam@scanner:scanner()}} |
    {error, kdleam@error:kdl_error()}.
parse_keyword_number(S) ->
    case kdleam@scanner:peek(S) of
        {some, <<"#"/utf8>>} ->
            Candidates = [{<<"#-inf"/utf8>>, <<"#-inf"/utf8>>},
                {<<"#inf"/utf8>>, <<"#inf"/utf8>>},
                {<<"#nan"/utf8>>, <<"#nan"/utf8>>}],
            case kdleam@scanner:try_tokens(S, Candidates) of
                {{some, Keyword}, Next} ->
                    {ok,
                        {{some,
                                kdleam@document:new_number_unchecked(
                                    Keyword,
                                    none,
                                    none
                                )},
                            Next}};

                {none, Next@1} ->
                    {ok, {none, Next@1}}
            end;

        _ ->
            {ok, {none, S}}
    end.

-file("src/kdleam/number.gleam", 275).
?DOC(false).
-spec power_of_ten(integer()) -> gleam@option:option(float()).
power_of_ten(Exponent) ->
    Magnitude = case Exponent < 0 of
        true ->
            0 - Exponent;

        false ->
            Exponent
    end,
    case Magnitude > 308 of
        true ->
            none;

        false ->
            case gleam@float:power(10.0, erlang:float(Magnitude)) of
                {ok, V} ->
                    {some, V};

                {error, _} ->
                    none
            end
    end.

-file("src/kdleam/number.gleam", 268).
?DOC(false).
-spec parse_exponent_int(binary()) -> gleam@option:option(integer()).
parse_exponent_int(Exponent) ->
    case gleam_stdlib:parse_int(
        gleam_stdlib:string_remove_prefix(Exponent, <<"+"/utf8>>)
    ) of
        {ok, V} ->
            {some, V};

        {error, _} ->
            none
    end.

-file("src/kdleam/number.gleam", 257).
?DOC(false).
-spec parse_float_base(binary()) -> gleam@option:option(float()).
parse_float_base(Base) ->
    case gleam_stdlib:parse_float(Base) of
        {ok, V} ->
            {some, V};

        {error, _} ->
            case gleam_stdlib:parse_int(Base) of
                {ok, V@1} ->
                    {some, erlang:float(V@1)};

                {error, _} ->
                    none
            end
    end.

-file("src/kdleam/number.gleam", 242).
?DOC(false).
-spec split_exponent(list(binary()), list(binary())) -> gleam@option:option({binary(),
    binary()}).
split_exponent(Chars, Rev_base) ->
    case Chars of
        [] ->
            none;

        [Ch | Rest] ->
            case (Ch =:= <<"e"/utf8>>) orelse (Ch =:= <<"E"/utf8>>) of
                true ->
                    {some,
                        {begin
                                _pipe = Rev_base,
                                _pipe@1 = lists:reverse(_pipe),
                                kdleam@scanner:join(_pipe@1)
                            end,
                            kdleam@scanner:join(Rest)}};

                false ->
                    split_exponent(Rest, [Ch | Rev_base])
            end
    end.

-file("src/kdleam/number.gleam", 222).
?DOC(false).
-spec parse_exponent_float(binary()) -> gleam@option:option(float()).
parse_exponent_float(Clean) ->
    case split_exponent(gleam@string:to_graphemes(Clean), []) of
        none ->
            none;

        {some, {Base, Exponent}} ->
            case {parse_float_base(Base), parse_exponent_int(Exponent)} of
                {{some, Base_float}, {some, Exp_int}} ->
                    case power_of_ten(Exp_int) of
                        {some, Factor} ->
                            {some, case Exp_int < 0 of
                                    true ->
                                        case Factor of
                                            +0.0 -> +0.0;
                                            -0.0 -> -0.0;
                                            Gleam@denominator -> Base_float / Gleam@denominator
                                        end;

                                    false ->
                                        Base_float * Factor
                                end};

                        none ->
                            none
                    end;

                {_, _} ->
                    none
            end
    end.

-file("src/kdleam/number.gleam", 211).
?DOC(false).
-spec parse_float_number(binary(), gleam@option:option(integer())) -> gleam@option:option(float()).
parse_float_number(Clean, As_int) ->
    case gleam_stdlib:parse_float(Clean) of
        {ok, V} ->
            {some, V};

        {error, _} ->
            case As_int of
                {some, V@1} ->
                    {some, erlang:float(V@1)};

                none ->
                    parse_exponent_float(Clean)
            end
    end.

-file("src/kdleam/number.gleam", 329).
?DOC(false).
-spec digits_less_or_equal(list(binary()), list(binary())) -> boolean().
digits_less_or_equal(Left, Right) ->
    case {Left, Right} of
        {[], []} ->
            true;

        {[L | Ls], [R | Rs]} ->
            Lc = kdleam@scanner:codepoint(L),
            Rc = kdleam@scanner:codepoint(R),
            case Lc < Rc of
                true ->
                    true;

                false ->
                    case Lc > Rc of
                        true ->
                            false;

                        false ->
                            digits_less_or_equal(Ls, Rs)
                    end
            end;

        {_, _} ->
            false
    end.

-file("src/kdleam/number.gleam", 322).
?DOC(false).
-spec strip_leading_zero_chars(list(binary())) -> list(binary()).
strip_leading_zero_chars(Chars) ->
    case Chars of
        [<<"0"/utf8>> | Rest] ->
            strip_leading_zero_chars(Rest);

        _ ->
            Chars
    end.

-file("src/kdleam/number.gleam", 314).
?DOC(false).
-spec strip_leading_zeros(binary()) -> binary().
strip_leading_zeros(Value) ->
    Stripped = strip_leading_zero_chars(gleam@string:to_graphemes(Value)),
    case Stripped of
        [] ->
            <<"0"/utf8>>;

        _ ->
            kdleam@scanner:join(Stripped)
    end.

-file("src/kdleam/number.gleam", 290).
?DOC(false).
-spec decimal_int_fits_i64(binary()) -> boolean().
decimal_int_fits_i64(Clean) ->
    Negative = gleam_stdlib:string_starts_with(Clean, <<"-"/utf8>>),
    Unsigned = begin
        _pipe = Clean,
        _pipe@1 = gleam_stdlib:string_remove_prefix(_pipe, <<"-"/utf8>>),
        _pipe@2 = gleam_stdlib:string_remove_prefix(_pipe@1, <<"+"/utf8>>),
        strip_leading_zeros(_pipe@2)
    end,
    Digits = gleam@string:to_graphemes(Unsigned),
    Len = erlang:length(Digits),
    case Len of
        0 ->
            true;

        N when N < 19 ->
            true;

        N@1 when N@1 > 19 ->
            false;

        _ ->
            digits_less_or_equal(
                Digits,
                gleam@string:to_graphemes(case Negative of
                        true ->
                            <<"9223372036854775808"/utf8>>;

                        false ->
                            <<"9223372036854775807"/utf8>>
                    end)
            )
    end.

-file("src/kdleam/number.gleam", 393).
?DOC(false).
-spec take_range(list(binary()), integer(), integer()) -> list(binary()).
take_range(Chars, Start, Count) ->
    _pipe = Chars,
    _pipe@1 = gleam@list:drop(_pipe, Start),
    gleam@list:take(_pipe@1, Count).

-file("src/kdleam/number.gleam", 389).
?DOC(false).
-spec raw_between(kdleam@scanner:scanner(), kdleam@scanner:scanner()) -> binary().
raw_between(Start, End) ->
    _pipe = take_range(
        erlang:element(3, Start),
        erlang:element(4, Start),
        erlang:element(4, End) - erlang:element(4, Start)
    ),
    kdleam@scanner:join(_pipe).

-file("src/kdleam/number.gleam", 200).
?DOC(false).
-spec reject_identifier_after_number(kdleam@scanner:scanner()) -> {ok,
        kdleam@scanner:scanner()} |
    {error, kdleam@error:kdl_error()}.
reject_identifier_after_number(S) ->
    case kdleam@scanner:peek(S) of
        {some, Ch} ->
            case kdleam@scanner:is_identifier_char(Ch) andalso (Ch /= <<"."/utf8>>) of
                true ->
                    {error, kdleam@scanner:make_error(S, invalid_number)};

                false ->
                    {ok, S}
            end;

        none ->
            {ok, S}
    end.

-file("src/kdleam/number.gleam", 355).
?DOC(false).
-spec collect_dec_part(kdleam@scanner:scanner(), list(binary())) -> {list(binary()),
    kdleam@scanner:scanner()}.
collect_dec_part(S, Acc) ->
    case kdleam@scanner:peek(S) of
        {some, <<"_"/utf8>>} ->
            {_, N} = kdleam@scanner:advance(S),
            collect_dec_part(N, [<<"_"/utf8>> | Acc]);

        {some, Ch} ->
            case kdleam@scanner:is_ascii_digit(Ch) of
                true ->
                    {_, N@1} = kdleam@scanner:advance(S),
                    collect_dec_part(N@1, [Ch | Acc]);

                false ->
                    {lists:reverse(Acc), S}
            end;

        _ ->
            {lists:reverse(Acc), S}
    end.

-file("src/kdleam/number.gleam", 373).
?DOC(false).
-spec parse_exponent(kdleam@scanner:scanner()) -> {boolean(),
    kdleam@scanner:scanner()}.
parse_exponent(S) ->
    {_, S1} = kdleam@scanner:advance(S),
    S2 = case kdleam@scanner:peek(S1) of
        {some, <<"+"/utf8>>} ->
            {_, N} = kdleam@scanner:advance(S1),
            N;

        {some, <<"-"/utf8>>} ->
            {_, N} = kdleam@scanner:advance(S1),
            N;

        _ ->
            S1
    end,
    {Digits, S3} = collect_dec_part(S2, []),
    case Digits of
        [] ->
            {false, S};

        _ ->
            {true, S3}
    end.

-file("src/kdleam/number.gleam", 348).
?DOC(false).
-spec option_is_digit(gleam@option:option(binary())) -> boolean().
option_is_digit(Ch) ->
    case Ch of
        {some, C} ->
            kdleam@scanner:is_ascii_digit(C);

        none ->
            false
    end.

-file("src/kdleam/number.gleam", 155).
?DOC(false).
-spec parse_decimal(kdleam@scanner:scanner(), kdleam@scanner:scanner()) -> {ok,
        {gleam@option:option(kdleam@document:kdl_number()),
            kdleam@scanner:scanner()}} |
    {error, kdleam@error:kdl_error()}.
parse_decimal(Start, S) ->
    {Int_digits, S1} = collect_dec_part(S, []),
    case Int_digits of
        [] ->
            {ok, {none, Start}};

        _ ->
            {Has_dot, _, S2} = case kdleam@scanner:peek(S1) of
                {some, <<"."/utf8>>} ->
                    case option_is_digit(kdleam@scanner:peek_next(S1)) of
                        true ->
                            {_, N} = kdleam@scanner:advance(S1),
                            {Frac, N2} = collect_dec_part(N, []),
                            {true, Frac, N2};

                        false ->
                            {false, [], S1}
                    end;

                _ ->
                    {false, [], S1}
            end,
            {Has_exp, S3} = case kdleam@scanner:peek(S2) of
                {some, <<"e"/utf8>>} ->
                    parse_exponent(S2);

                {some, <<"E"/utf8>>} ->
                    parse_exponent(S2);

                _ ->
                    {false, S2}
            end,
            gleam@result:'try'(
                reject_identifier_after_number(S3),
                fun(S4) ->
                    Raw = raw_between(Start, S3),
                    Clean = kdleam@scanner:clean_underscores(Raw),
                    As_int = case (Has_dot orelse Has_exp) orelse gleam_stdlib:contains_string(
                        Clean,
                        <<"+"/utf8>>
                    ) of
                        true ->
                            none;

                        false ->
                            case decimal_int_fits_i64(Clean) of
                                false ->
                                    none;

                                true ->
                                    case gleam_stdlib:parse_int(Clean) of
                                        {ok, V} ->
                                            {some, V};

                                        {error, _} ->
                                            none
                                    end
                            end
                    end,
                    As_float = parse_float_number(Clean, As_int),
                    {ok,
                        {{some,
                                kdleam@document:new_number_unchecked(
                                    Raw,
                                    As_int,
                                    As_float
                                )},
                            S4}}
                end
            )
    end.

-file("src/kdleam/number.gleam", 97).
?DOC(false).
-spec decimal_int_of_prefixed(
    binary(),
    gleam@option:option(binary()),
    integer()
) -> gleam@option:option(integer()).
decimal_int_of_prefixed(Digits, Sign, Base) ->
    case kdleam@bignum:base_to_decimal(
        kdleam@scanner:clean_underscores(Digits),
        Base
    ) of
        {error, _} ->
            none;

        {ok, Decimal} ->
            Signed = case {Sign, Decimal} of
                {{some, <<"-"/utf8>>}, <<"0"/utf8>>} ->
                    Decimal;

                {{some, <<"-"/utf8>>}, _} ->
                    <<"-"/utf8, Decimal/binary>>;

                {_, _} ->
                    Decimal
            end,
            case gleam_stdlib:parse_int(Signed) of
                {ok, V} ->
                    case erlang:integer_to_binary(V) =:= Signed of
                        true ->
                            {some, V};

                        false ->
                            none
                    end;

                {error, _} ->
                    none
            end
    end.

-file("src/kdleam/number.gleam", 144).
?DOC(false).
-spec digit_valid(binary(), integer()) -> boolean().
digit_valid(Ch, Base) ->
    C = kdleam@scanner:codepoint(Ch),
    case Base of
        2 ->
            (Ch =:= <<"0"/utf8>>) orelse (Ch =:= <<"1"/utf8>>);

        8 ->
            (C >= 48) andalso (C =< 55);

        10 ->
            kdleam@scanner:is_ascii_digit(Ch);

        16 ->
            kdleam@scanner:is_hex_digit(Ch);

        _ ->
            false
    end.

-file("src/kdleam/number.gleam", 122).
?DOC(false).
-spec collect_base_digits(kdleam@scanner:scanner(), integer(), list(binary())) -> {list(binary()),
    kdleam@scanner:scanner()}.
collect_base_digits(S, Base, Acc) ->
    case kdleam@scanner:peek(S) of
        {some, <<"_"/utf8>>} ->
            {_, N} = kdleam@scanner:advance(S),
            collect_base_digits(N, Base, [<<"_"/utf8>> | Acc]);

        {some, Ch} ->
            case digit_valid(Ch, Base) of
                true ->
                    {_, N@1} = kdleam@scanner:advance(S),
                    collect_base_digits(N@1, Base, [Ch | Acc]);

                false ->
                    {lists:reverse(Acc), S}
            end;

        _ ->
            {lists:reverse(Acc), S}
    end.

-file("src/kdleam/number.gleam", 68).
?DOC(false).
-spec parse_prefixed(
    kdleam@scanner:scanner(),
    kdleam@scanner:scanner(),
    gleam@option:option(binary()),
    integer()
) -> {ok,
        {gleam@option:option(kdleam@document:kdl_number()),
            kdleam@scanner:scanner()}} |
    {error, kdleam@error:kdl_error()}.
parse_prefixed(Start, S, Sign, Base) ->
    {_, S1} = kdleam@scanner:advance(S),
    {_, S2} = kdleam@scanner:advance(S1),
    case kdleam@scanner:peek(S2) of
        {some, Ch} ->
            case digit_valid(Ch, Base) of
                true ->
                    {_, S3} = collect_base_digits(S2, Base, []),
                    gleam@result:'try'(
                        reject_identifier_after_number(S3),
                        fun(S4) ->
                            Raw = raw_between(Start, S3),
                            Digits = raw_between(S2, S3),
                            As_int = decimal_int_of_prefixed(Digits, Sign, Base),
                            As_float = case As_int of
                                {some, V} ->
                                    {some, erlang:float(V)};

                                none ->
                                    none
                            end,
                            {ok,
                                {{some,
                                        kdleam@document:new_number_unchecked(
                                            Raw,
                                            As_int,
                                            As_float
                                        )},
                                    S4}}
                        end
                    );

                false ->
                    {error, kdleam@scanner:make_error(S2, invalid_number)}
            end;

        _ ->
            {error, kdleam@scanner:make_error(S2, invalid_number)}
    end.

-file("src/kdleam/number.gleam", 34).
?DOC(false).
-spec parse_number(kdleam@scanner:scanner()) -> {ok,
        {gleam@option:option(kdleam@document:kdl_number()),
            kdleam@scanner:scanner()}} |
    {error, kdleam@error:kdl_error()}.
parse_number(S) ->
    Start = S,
    {Sign, S1} = case kdleam@scanner:peek(S) of
        {some, <<"+"/utf8>>} ->
            {_, N} = kdleam@scanner:advance(S),
            {{some, <<"+"/utf8>>}, N};

        {some, <<"-"/utf8>>} ->
            {_, N@1} = kdleam@scanner:advance(S),
            {{some, <<"-"/utf8>>}, N@1};

        _ ->
            {none, S}
    end,
    case kdleam@scanner:peek(S1) of
        {some, <<"0"/utf8>>} ->
            case kdleam@scanner:peek_next(S1) of
                {some, Marker} ->
                    case kdleam@scanner:radix_of_marker(Marker) of
                        {some, Base} ->
                            parse_prefixed(Start, S1, Sign, Base);

                        none ->
                            parse_decimal(Start, S1)
                    end;

                none ->
                    parse_decimal(Start, S1)
            end;

        {some, Ch} ->
            case kdleam@scanner:is_ascii_digit(Ch) of
                true ->
                    parse_decimal(Start, S1);

                false ->
                    {ok, {none, Start}}
            end;

        _ ->
            {ok, {none, Start}}
    end.