-module(gleeth@utils@file).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/gleeth/utils/file.gleam").
-export([read_addresses_from_file/1]).

-file("src/gleeth/utils/file.gleam", 28).
-spec validate_addresses_from_lines(list(binary())) -> {ok, list(binary())} |
    {error, gleeth@rpc@types:gleeth_error()}.
validate_addresses_from_lines(Lines) ->
    case Lines of
        [] ->
            {error, {config_error, <<"No valid addresses found in file"/utf8>>}};

        _ ->
            gleam@list:try_map(
                Lines,
                fun gleeth@utils@validation:validate_address/1
            )
    end.

-file("src/gleeth/utils/file.gleam", 9).
-spec read_addresses_from_file(binary()) -> {ok, list(binary())} |
    {error, gleeth@rpc@types:gleeth_error()}.
read_addresses_from_file(Filename) ->
    case simplifile:read(Filename) of
        {ok, Content} ->
            Lines = gleam@string:split(Content, <<"\n"/utf8>>),
            Trimmed_lines = gleam@list:map(Lines, fun gleam@string:trim/1),
            Non_empty_lines = gleam@list:filter(
                Trimmed_lines,
                fun(Line) ->
                    not gleam@string:is_empty(Line) andalso not gleam_stdlib:string_starts_with(
                        Line,
                        <<"#"/utf8>>
                    )
                end
            ),
            validate_addresses_from_lines(Non_empty_lines);

        {error, _} ->
            {error,
                {config_error,
                    <<"Could not read file: "/utf8, Filename/binary>>}}
    end.