// Copyright (C) 2026 Viorel Munteanu
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

#pragma once

#include <filesystem>
#include <optional>
#include <string>

// Fields that make sense to persist across invocations (one-shot flags like
// -m/-r/--user don't belong here). Only the "global" section's log-level is
// supported today; add more optional fields as more long options gain config-file
// support.
struct AppConfig {
    std::optional<std::string> log_level;  // global.log-level
};

// $XDG_CONFIG_HOME/slocker-lite/config.yaml, or $HOME/.config/slocker-lite/config.yaml
// if XDG_CONFIG_HOME is unset/empty.
std::filesystem::path config_file_path();

// Loads and parses `path`'s "global" section. A missing file is not an error --
// returns a default-constructed AppConfig (nothing set). Unknown sections/keys are
// ignored, so the format stays forward-compatible. Malformed YAML syntax logs a
// specific error and returns nullopt.
std::optional<AppConfig> load_config_file(const std::filesystem::path& path);