<?php
/**
 * ajax/system.php
 *
 * Backs the Dashboard panel's summary tiles and the service-status line
 * shown in the page header — aggregates across several libpod endpoints
 * into the one shape javascript/dashboard.js needs, so the frontend
 * doesn't have to make (and wait on) five separate round trips.
 *
 * Actions (?action=...):
 *   summary   GET -> counts, storage usage, engine version, ping status
 */

declare(strict_types=1);

require __DIR__ . '/../include/bootstrap.php';

$action = $_GET['action'] ?? '';

switch ($action) {
    case 'summary':
        podman_json_response(system_summary($client, $podmanConfig));
        break;

    default:
        podman_json_error("Unknown action '{$action}'", 400);
}

/** @return array<string,mixed> */
function system_summary(PodmanClient $client, PodmanConfig $config): array
{
    if (!$client->ping()) {
        return [
            'reachable' => false,
            'socketPath' => $config->socketPath,
        ];
    }

    $containers = $client->listContainers(true);
    $running = 0;
    foreach ($containers as $c) {
        if (strtolower((string) ($c['State'] ?? '')) === 'running') {
            $running++;
        }
    }

    $pods = $client->listPods();
    $images = $client->listImages();
    $volumes = $client->listVolumes();
    $networks = $client->listNetworks();
    $info = $client->info();
    $df = $client->systemDf();

    $imagesSize = 0;
    foreach (($df['Images'] ?? []) as $img) {
        $imagesSize += (int) ($img['Size'] ?? 0);
    }

    return [
        'reachable' => true,
        'socketPath' => $config->socketPath,
        'podmanVersion' => $info['Version']['Version'] ?? null,
        'containers' => [
            'total' => count($containers),
            'running' => $running,
        ],
        'pods' => count($pods),
        'images' => count($images),
        'volumes' => count($volumes),
        'networks' => count($networks),
        'storage' => [
            'imagesSizeBytes' => $imagesSize,
            'imagesSizeFormatted' => podman_format_bytes($imagesSize),
        ],
    ];
}