-module(toon_codec@decode@validation).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/toon_codec/decode/validation.gleam").
-export([validate_count/3, validate_row_width/3, validate_indentation/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(
    " Validation functions for strict mode decoding.\n"
    "\n"
    " This module provides functions to validate counts, indentation,\n"
    " and other structural requirements in strict mode.\n"
    " Validate that actual count matches expected count.\n"
    "\n"
    " Used in strict mode to ensure array lengths match declarations.\n"
    " Validate row width in tabular arrays.\n"
    " Validate that indentation is a multiple of indent_size.\n"
).

-file("src/toon_codec/decode/validation.gleam", 16).
-spec validate_count(integer(), integer(), binary()) -> {ok, nil} |
    {error, toon_codec@error:toon_error()}.
validate_count(Expected, Actual, Context) ->
    case Expected =:= Actual of
        true ->
            {ok, nil};

        false ->
            {error, toon_codec@error:count_mismatch(Expected, Actual, Context)}
    end.

-file("src/toon_codec/decode/validation.gleam", 27).
-spec validate_row_width(integer(), integer(), integer()) -> {ok, nil} |
    {error, toon_codec@error:toon_error()}.
validate_row_width(Expected, Actual, Row_number) ->
    case Expected =:= Actual of
        true ->
            {ok, nil};

        false ->
            {error,
                toon_codec@error:validation_error(
                    <<<<<<<<<<"Row "/utf8,
                                        (erlang:integer_to_binary(Row_number))/binary>>/binary,
                                    ": expected "/utf8>>/binary,
                                (erlang:integer_to_binary(Expected))/binary>>/binary,
                            " values, got "/utf8>>/binary,
                        (erlang:integer_to_binary(Actual))/binary>>
                )}
    end.

-file("src/toon_codec/decode/validation.gleam", 48).
-spec validate_indentation(integer(), integer(), integer()) -> {ok, nil} |
    {error, toon_codec@error:toon_error()}.
validate_indentation(Indent, Indent_size, Line) ->
    case case Indent_size of
        0 -> 0;
        Gleam@denominator -> Indent rem Gleam@denominator
    end of
        0 ->
            {ok, nil};

        _ ->
            {error,
                toon_codec@error:indentation_error(
                    <<<<"Indentation must be a multiple of "/utf8,
                            (erlang:integer_to_binary(Indent_size))/binary>>/binary,
                        " spaces"/utf8>>,
                    Line
                )}
    end.