<?php declare(strict_types = 0);
/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** 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.
**/


/**
 * A class for accessing once loaded parameters of Housekeeping API object.
 */
class CHousekeepingHelper extends CConfigGeneralHelper {

	public const COMPRESS_OLDER = 'compress_older';
	public const COMPRESSION_STATUS = 'compression_status';
	public const DB_EXTENSION = 'db_extension';
	public const HK_AUDIT = 'hk_audit';
	public const HK_AUDIT_MODE = 'hk_audit_mode';
	public const HK_EVENTS_AUTOREG = 'hk_events_autoreg';
	public const HK_EVENTS_DISCOVERY = 'hk_events_discovery';
	public const HK_EVENTS_INTERNAL = 'hk_events_internal';
	public const HK_EVENTS_MODE = 'hk_events_mode';
	public const HK_EVENTS_TRIGGER = 'hk_events_trigger';
	public const HK_EVENTS_SERVICE = 'hk_events_service';
	public const HK_HISTORY = 'hk_history';
	public const HK_HISTORY_GLOBAL = 'hk_history_global';
	public const HK_HISTORY_MODE = 'hk_history_mode';
	public const HK_SERVICES = 'hk_services';
	public const HK_SERVICES_MODE = 'hk_services_mode';
	public const HK_SESSIONS = 'hk_sessions';
	public const HK_SESSIONS_MODE = 'hk_sessions_mode';
	public const HK_TRENDS = 'hk_trends';
	public const HK_TRENDS_GLOBAL = 'hk_trends_global';
	public const HK_TRENDS_MODE = 'hk_trends_mode';

	public const OVERRIDE_NEEDED_HISTORY =	'hk_needs_override_history';
	public const OVERRIDE_NEEDED_TRENDS =	'hk_needs_override_trends';

	private const DBVERSION_COMPRESSED_CHUNKS_HISTORY = 'compressed_chunks_history';
	private const DBVERSION_COMPRESSED_CHUNKS_TRENDS = 'compressed_chunks_trends';

	/**
	 * Housekeeping API object parameters array.
	 *
	 * @static
	 *
	 * @var array
	 */
	protected static $params = [];

	/**
	 * @inheritdoc
	 */
	protected static function loadParams(?string $param = null, bool $is_global = false): void {
		if (!self::$params) {
			self::$params = API::Housekeeping()->get(['output' => 'extend']);

			if (self::$params === false) {
				throw new Exception(_('Unable to load housekeeping API parameters.'));
			}
		}
	}

	/**
	 * @param array $dbversion_status
	 *
	 * @return array
	 */
	public static function getWarnings(array $dbversion_status): array {
		$warnings = [];

		foreach ($dbversion_status as $dbversion) {
			if ($dbversion['database'] === ZBX_DB_EXTENSION_TIMESCALEDB) {
				$compression_available = array_key_exists('compression_availability', $dbversion)
					&& $dbversion['compression_availability'];

				if ($compression_available) {
					$warnings[self::OVERRIDE_NEEDED_HISTORY] =
						array_key_exists(self::DBVERSION_COMPRESSED_CHUNKS_HISTORY, $dbversion)
							&& $dbversion[self::DBVERSION_COMPRESSED_CHUNKS_HISTORY] == 1;

					$warnings[self::OVERRIDE_NEEDED_TRENDS] =
						array_key_exists(self::DBVERSION_COMPRESSED_CHUNKS_TRENDS, $dbversion)
							&& $dbversion[self::DBVERSION_COMPRESSED_CHUNKS_TRENDS] == 1;
				}

				break;
			}
		}

		return array_filter($warnings);
	}
}