<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package        observium
 * @subpackage     discovery
 * @copyright  (C) Adam Armstrong
 *
 */

if (!safe_empty($valid['processor']['cpm'])) {
    // Skip HOST-RESOURCES-MIB when CISCO-PROCESS-MIB already discovered
    // See: https://jira.observium.org/browse/OBS-4394
    return;
}

$hr_array = snmpwalk_cache_oid($device, 'hrProcessorLoad', [], 'HOST-RESOURCES-MIB:HOST-RESOURCES-TYPES');
$hr_count = safe_count($hr_array);

if ($hr_count) {
    $hr_array = snmpwalk_cache_oid($device, 'hrDevice', $hr_array, 'HOST-RESOURCES-MIB:HOST-RESOURCES-TYPES');

    $hr_cpus  = 0;
    $hr_total = 0;

    foreach ($hr_array as $index => $entry) {
        if (!is_numeric($entry['hrProcessorLoad'])) {
            continue;
        }
        if ($device['os'] === 'arista_eos' && $index == 1) {
            continue;
        }

        if (!isset($entry['hrDeviceType'])) {
            $entry['hrDeviceType']  = 'hrDeviceProcessor';
            $entry['hrDeviceIndex'] = $index;
        } elseif ($entry['hrDeviceType'] === 'hrDeviceOther' &&
                  preg_match('/^cpu\d+:/', $entry['hrDeviceDescr'])) {
            // Workaround bsnmpd reporting CPUs as hrDeviceOther (FY FreeBSD.)
            $entry['hrDeviceType'] = 'hrDeviceProcessor';
        }

        if ($entry['hrDeviceType'] === 'hrDeviceProcessor') {
            $hrDeviceIndex = $entry['hrDeviceIndex'];

            $usage_oid = ".1.3.6.1.2.1.25.3.3.1.2.$index";
            $usage     = $entry['hrProcessorLoad'];

            // Workaround to set fake description for Mikrotik and other who don't populate hrDeviceDescr
            if (empty($entry['hrDeviceDescr'])) {
                $descr = 'Processor';
                if ($hr_count > 1) {
                    // Append processor index
                    $descr .= ' ' . ($index - 1);
                }
            } elseif (str_contains($entry['hrDeviceDescr'], ':')) {
                // What is this for? I have forgotten. What has : in its hrDeviceDescr?
                // Set description to that found in hrDeviceDescr, first part only if containing a :
                [, $descr] = explode(':', $entry['hrDeviceDescr']);
            } else {
                $descr = $entry['hrDeviceDescr'];
            }

            $descr = rewrite_entity_name($descr);

            if ($descr !== 'An electronic chip that makes the computer work.') {
                discover_processor($valid['processor'], $device, $usage_oid, $index, 'hr', $descr, 1, $usage, NULL, $hrDeviceIndex);
                $hr_cpus++;
                $hr_total += $usage;
            }
            unset($old_rrd, $new_rrd, $descr, $entry, $usage_oid, $index, $usage, $hrDeviceIndex);
        }
        unset($entry);
    }

    if ($hr_cpus) {
        discover_processor($valid['processor'], $device, 1, 1, 'hr-average', 'Average', 1, $hr_total / $hr_cpus);

        // Remove UCD processor poller, this is because UCD-SNMP-MIB run earlier
        $ucd_where = '`device_id` = ? AND `processor_type` IN (?, ?)';
        $ucd_params = [ $device['device_id'], 'ucd-old', 'ucd-raw' ];
        if (dbExist('processors', $ucd_where, $ucd_params)) {
            print_debug("Removed UCD processor, prefer HOST-RESOURCES average");
            $GLOBALS['module_stats']['processors']['deleted']++;
            dbDelete('processors', $ucd_where, $ucd_where);
        }
    }

    unset($hr_array, $oid, $ucd_where, $ucd_params);
}

// EOF