<?php
/**
 * Module.php
 *
 * -Description-
 *
 * 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 3 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, see <https://www.gnu.org/licenses/>.
 *
 * @link       https://www.librenms.org
 *
 * @copyright  2022 Tony Murray
 * @author     Tony Murray <murraytony@gmail.com>
 */

namespace LibreNMS\Util;

use App\Models\Device;
use LibreNMS\Config;
use LibreNMS\Modules\LegacyModule;
use LibreNMS\Polling\ModuleStatus;

class Module
{
    public static function exists(string $module_name): bool
    {
        if (class_exists(StringHelpers::toClass($module_name, '\\LibreNMS\\Modules\\'))) {
            return true;
        }

        return Config::has('discovery_modules.' . $module_name) || Config::has('poller_modules.' . $module_name);
    }

    public static function fromName(string $module_name): \LibreNMS\Interfaces\Module
    {
        $module_class = StringHelpers::toClass($module_name, '\\LibreNMS\\Modules\\');

        return class_exists($module_class) ? new $module_class : new LegacyModule($module_name);
    }

    public static function legacyDiscoveryExists(string $module_name): bool
    {
        return is_file(base_path("includes/discovery/$module_name.inc.php"));
    }

    public static function legacyPollingExists(string $module_name): bool
    {
        return is_file(base_path("includes/polling/$module_name.inc.php"));
    }

    public static function pollingStatus(string $module_name, Device $device, ?bool $manual = null): ModuleStatus
    {
        return new ModuleStatus(
            Config::get("poller_modules.$module_name"),
            Config::get("os.{$device->os}.poller_modules.$module_name"),
            $device->getAttrib("poll_$module_name"),
            $manual,
        );
    }

    public static function parseUserOverrides(array $overrides): array
    {
        $modules = [];

        foreach ($overrides as $index => $module) {
            // parse submodules (only supported by some modules)
            if (str_contains($module, '/')) {
                [$module, $submodule] = explode('/', $module, 2);
                $modules[$module][] = $submodule;
            } elseif (self::exists($module)) {
                $modules[$module] = true;
            }
        }

        return $modules;
    }
}