-module(envoker@error).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src\\envoker\\error.gleam").
-export([to_string/1]).
-export_type([env_field_error/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.

-type env_field_error() :: {empty_field_error, binary()} |
    {missing_field_error, binary()} |
    {parse_field_error,
        binary(),
        binary(),
        binary(),
        gleam@option:option(binary())}.

-file("src\\envoker\\error.gleam", 16).
?DOC(" Converts a structured error into a readable message.\n").
-spec to_string(env_field_error()) -> binary().
to_string(Error) ->
    case Error of
        {empty_field_error, Field_name} ->
            <<<<"Empty value in '"/utf8, Field_name/binary>>/binary, "'"/utf8>>;

        {missing_field_error, Field_name@1} ->
            <<<<"Missing environment variable '"/utf8, Field_name@1/binary>>/binary,
                "'."/utf8>>;

        {parse_field_error, Field_name@2, Expected_type, Field_value, Details} ->
            <<<<<<<<<<<<"Failed to parse field '"/utf8, Field_name@2/binary>>/binary,
                                "' with value '"/utf8>>/binary,
                            Field_value/binary>>/binary,
                        "'. Expected type: "/utf8>>/binary,
                    Expected_type/binary>>/binary,
                (case Details of
                    {some, Text} ->
                        <<". Details: "/utf8, Text/binary>>;

                    none ->
                        <<""/utf8>>
                end)/binary>>
    end.