-module(parser_gleam@char).
-compile(no_auto_import).

-export([char/1, not_char/1, one_of/1, not_one_of/1, many/1, many1/1, digit/0, space/0, alphanum/0, letter/0, unicode_letter/0, upper/0, lower/0, not_digit/0, not_space/0, not_alphanum/0, not_letter/0, not_upper/0, not_lower/0]).

-spec maybe() -> fun((fun((parser_gleam@stream:stream(GJP)) -> {ok,
                                                                parser_gleam@parse_result:parse_success(GJP, binary())} |
    {error, parser_gleam@parse_result:parse_error(GJP)})) -> fun((parser_gleam@stream:stream(GJP)) -> {ok,
                                                                                                       parser_gleam@parse_result:parse_success(GJP, binary())} |
    {error, parser_gleam@parse_result:parse_error(GJP)})).
maybe() ->
    parser_gleam@parser:maybe(fp_gl@fstring:monoid()).

-spec char(binary()) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                       parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
char(C) ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun(S) -> S =:= C end),
        gleam@string:concat([<<"\""/utf8>>, C, <<"\""/utf8>>])
    ).

-spec not_char(binary()) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                           parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_char(C) ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun(S) -> S /= C end),
        gleam@string:concat([<<"anything but \""/utf8>>, C, <<"\""/utf8>>])
    ).

-spec is_one_of(binary(), binary()) -> boolean().
is_one_of(S, C) ->
    _pipe = S,
    gleam@string:contains(_pipe, C).

-spec one_of(binary()) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                         parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
one_of(S) ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun(C) -> is_one_of(S, C) end),
        gleam@string:concat([<<"One of \""/utf8>>, S, <<"\""/utf8>>])
    ).

-spec not_one_of(binary()) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                             parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_one_of(S) ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun(C) -> not is_one_of(S, C) end),
        gleam@string:concat([<<"Not one of \""/utf8>>, S, <<"\""/utf8>>])
    ).

-spec many(
    fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                   parser_gleam@parse_result:parse_success(binary(), binary())} |
        {error, parser_gleam@parse_result:parse_error(binary())})
) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
many(Parser) ->
    (maybe())(many1(Parser)).

-spec many1(
    fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                   parser_gleam@parse_result:parse_success(binary(), binary())} |
        {error, parser_gleam@parse_result:parse_error(binary())})
) -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
many1(Parser) ->
    _pipe = parser_gleam@parser:many1(Parser),
    parser_gleam@parser:map(
        _pipe,
        fun(Nea) ->
            _pipe@1 = Nea,
            _pipe@2 = fp_gl@non_empty_list:to_list(_pipe@1),
            gleam@string:join(_pipe@2, <<""/utf8>>)
        end
    ).

-spec is_digit(binary()) -> boolean().
is_digit(C) ->
    _pipe = <<"0123456789"/utf8>>,
    gleam@string:contains(_pipe, C).

-spec digit() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
digit() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_digit/1),
        <<"a digit"/utf8>>
    ).

-spec is_space(binary()) -> boolean().
is_space(C) ->
    {ok, Re@1} = case gleam@regex:from_string(<<"^\\s$"/utf8>>) of
        {ok, Re} -> {ok, Re};
        _try ->
            erlang:error(#{gleam_error => assert,
                           message => <<"Assertion pattern match failed"/utf8>>,
                           value => _try,
                           module => <<"parser_gleam/char"/utf8>>,
                           function => <<"is_space"/utf8>>,
                           line => 91})
    end,
    gleam@regex:check(Re@1, C).

-spec space() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
space() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_space/1),
        <<"a whitespace"/utf8>>
    ).

-spec is_underscore(binary()) -> boolean().
is_underscore(C) ->
    C =:= <<"_"/utf8>>.

-spec is_letter(binary()) -> boolean().
is_letter(C) ->
    {ok, Re@1} = case gleam@regex:from_string(<<"[a-z]"/utf8>>) of
        {ok, Re} -> {ok, Re};
        _try ->
            erlang:error(#{gleam_error => assert,
                           message => <<"Assertion pattern match failed"/utf8>>,
                           value => _try,
                           module => <<"parser_gleam/char"/utf8>>,
                           function => <<"is_letter"/utf8>>,
                           line => 105})
    end,
    gleam@regex:check(
        Re@1,
        begin
            _pipe = C,
            gleam@string:lowercase(_pipe)
        end
    ).

-spec is_alphanum(binary()) -> boolean().
is_alphanum(C) ->
    (is_letter(C) orelse is_digit(C)) orelse is_underscore(C).

-spec alphanum() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                   parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
alphanum() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_alphanum/1),
        <<"a word character"/utf8>>
    ).

-spec letter() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                 parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
letter() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_letter/1),
        <<"a letter"/utf8>>
    ).

-spec is_unicode_letter(binary()) -> boolean().
is_unicode_letter(C) ->
    gleam@string:lowercase(C) /= gleam@string:uppercase(C).

-spec unicode_letter() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                         parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
unicode_letter() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_unicode_letter/1),
        <<"an unicode letter"/utf8>>
    ).

-spec is_upper(binary()) -> boolean().
is_upper(C) ->
    is_letter(C) andalso (C =:= gleam@string:uppercase(C)).

-spec upper() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
upper() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_upper/1),
        <<"an upper case letter"/utf8>>
    ).

-spec is_lower(binary()) -> boolean().
is_lower(C) ->
    is_letter(C) andalso (C =:= gleam@string:lowercase(C)).

-spec lower() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
lower() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fun is_lower/1),
        <<"a lower case letter"/utf8>>
    ).

-spec not_digit() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_digit() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_digit/1)),
        <<"a non-digit"/utf8>>
    ).

-spec not_space() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_space() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_space/1)),
        <<"a non-whitespace character"/utf8>>
    ).

-spec not_alphanum() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                       parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_alphanum() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_alphanum/1)),
        <<"a non-word character"/utf8>>
    ).

-spec not_letter() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                     parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_letter() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_letter/1)),
        <<"a non-letter character"/utf8>>
    ).

-spec not_upper() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_upper() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_upper/1)),
        <<"anything but an upper case letter"/utf8>>
    ).

-spec not_lower() -> fun((parser_gleam@stream:stream(binary())) -> {ok,
                                                                    parser_gleam@parse_result:parse_success(binary(), binary())} |
    {error, parser_gleam@parse_result:parse_error(binary())}).
not_lower() ->
    parser_gleam@parser:expected(
        parser_gleam@parser:sat(fp_gl@predicate:'not'(fun is_lower/1)),
        <<"anything but a lower case letter"/utf8>>
    ).