<?php

/*
 * The MIT License
 *
 * Copyright 2025 Tim Fry <tim@fusionpbx.com>.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * Description of system_information
 *
 * @author Tim Fry <tim@fusionpbx.com>
 */
abstract class system_information {

	abstract public function get_cpu_cores(): int;
	abstract public function get_uptime();
	abstract public function get_cpu_percent(): float;
	abstract public function get_cpu_percent_per_core(): array;
	abstract public function get_network_speed(string $interface = 'eth0'): array;

	/**
	 * Returns the system load average.
	 *
	 * @return array Three most recent one-minute load averages.
	 */
	public function get_load_average() {
		return sys_getloadavg();
	}

	/**
	 * Returns a system information object based on the underlying operating system.
	 *
	 * @return ?system_information The system information object for the current OS, or null if not supported.
	 */
	public static function new(): ?system_information {
		if (stristr(PHP_OS, 'BSD')) {
			return new bsd_system_information();
		}
		if (stristr(PHP_OS, 'Linux')) {
			return new linux_system_information();
		}
		return null;
	}
}