-module(roundabout@constant).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/roundabout/constant.gleam").
-export([new/1, unsafe/1, value/1]).
-export_type([constant/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.

-opaque constant() :: {constant, binary()}.

-file("src/roundabout/constant.gleam", 10).
?DOC(false).
-spec new(binary()) -> {ok, constant()} | {error, binary()}.
new(Value) ->
    Re@1 = case gleam@regexp:from_string(<<"^[a-zA-Z0-9._~%-]+$"/utf8>>) of
        {ok, Re} -> Re;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"roundabout/constant"/utf8>>,
                        function => <<"new"/utf8>>,
                        line => 11,
                        value => _assert_fail,
                        start => 175,
                        'end' => 236,
                        pattern_start => 186,
                        pattern_end => 192})
    end,
    Candidate = string:lowercase(Value),
    case gleam@regexp:check(Re@1, Candidate) of
        true ->
            {ok, {constant, Candidate}};

        false ->
            {error, <<"Invalid constant value "/utf8, Value/binary>>}
    end.

-file("src/roundabout/constant.gleam", 22).
?DOC(false).
-spec unsafe(binary()) -> constant().
unsafe(Value) ->
    {constant, Value}.

-file("src/roundabout/constant.gleam", 27).
?DOC(false).
-spec value(constant()) -> binary().
value(Input) ->
    erlang:element(2, Input).