-module(libero@cli@validation).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/libero/cli/validation.gleam").
-export([is_lowercase_letter/1, is_digit/1, validate_name/3]).

-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(" Shared validation for CLI commands (project names, client names, etc.).\n").

-file("src/libero/cli/validation.gleam", 69).
-spec kind_cap(binary()) -> binary().
kind_cap(Kind) ->
    case Kind of
        <<"project"/utf8>> ->
            <<"Project"/utf8>>;

        <<"client"/utf8>> ->
            <<"Client"/utf8>>;

        _ ->
            Kind
    end.

-file("src/libero/cli/validation.gleam", 10).
-spec is_lowercase_letter(binary()) -> boolean().
is_lowercase_letter(Ch) ->
    gleam_stdlib:contains_string(<<"abcdefghijklmnopqrstuvwxyz"/utf8>>, Ch).

-file("src/libero/cli/validation.gleam", 14).
-spec is_digit(binary()) -> boolean().
is_digit(Ch) ->
    gleam_stdlib:contains_string(<<"0123456789"/utf8>>, Ch).

-file("src/libero/cli/validation.gleam", 27).
?DOC(
    " Validate a name for use as a project or client name.\n"
    " Returns Ok(Nil) if valid, Error(String) with a user-facing error message if not.\n"
    " nolint: stringly_typed_error -- CLI-facing error, String is appropriate\n"
).
-spec validate_name(binary(), binary(), binary()) -> {ok, nil} |
    {error, binary()}.
validate_name(Name, Kind, Hint) ->
    case gleam@string:to_graphemes(Name) of
        [] ->
            {error,
                <<<<<<<<<<"error: Invalid "/utf8, Kind/binary>>/binary,
                                " name
  \x{2502}
  \x{2502} "/utf8>>/binary,
                            (kind_cap(Kind))/binary>>/binary,
                        " name cannot be empty
  \x{2502}
  hint: "/utf8>>/binary,
                    Hint/binary>>};

        [First | Rest] ->
            case is_lowercase_letter(First) of
                false ->
                    {error,
                        <<<<<<<<<<<<"error: Invalid "/utf8, Kind/binary>>/binary,
                                            " name: `"/utf8>>/binary,
                                        Name/binary>>/binary,
                                    "`
  \x{2502}
  \x{2502} Must start with a lowercase letter (a-z)
  \x{2502}
  hint: Try `"/utf8>>/binary,
                                (string:lowercase(Name))/binary>>/binary,
                            "` instead"/utf8>>};

                true ->
                    case gleam@list:all(
                        Rest,
                        fun(Ch) ->
                            (is_lowercase_letter(Ch) orelse is_digit(Ch)) orelse (Ch
                            =:= <<"_"/utf8>>)
                        end
                    ) of
                        false ->
                            {error,
                                <<<<<<<<"error: Invalid "/utf8, Kind/binary>>/binary,
                                            " name: `"/utf8>>/binary,
                                        Name/binary>>/binary,
                                    "`
  \x{2502}
  \x{2502} Must contain only lowercase letters, digits, and underscores"/utf8>>};

                        true ->
                            case gleam@list:contains(
                                [<<"as"/utf8>>,
                                    <<"assert"/utf8>>,
                                    <<"auto"/utf8>>,
                                    <<"case"/utf8>>,
                                    <<"const"/utf8>>,
                                    <<"external"/utf8>>,
                                    <<"fn"/utf8>>,
                                    <<"if"/utf8>>,
                                    <<"import"/utf8>>,
                                    <<"let"/utf8>>,
                                    <<"macro"/utf8>>,
                                    <<"opaque"/utf8>>,
                                    <<"panic"/utf8>>,
                                    <<"pub"/utf8>>,
                                    <<"test"/utf8>>,
                                    <<"todo"/utf8>>,
                                    <<"type"/utf8>>,
                                    <<"use"/utf8>>],
                                Name
                            ) of
                                true ->
                                    {error,
                                        <<<<<<<<<<<<"error: Invalid "/utf8,
                                                                Kind/binary>>/binary,
                                                            " name: `"/utf8>>/binary,
                                                        Name/binary>>/binary,
                                                    "`
  \x{2502}
  \x{2502} `"/utf8>>/binary,
                                                Name/binary>>/binary,
                                            "` is a Gleam reserved word
  \x{2502}
  hint: Choose a different name"/utf8>>};

                                false ->
                                    {ok, nil}
                            end
                    end
            end
    end.