<?php
/**
 * ajax/containers.php
 *
 * Backs the Containers panel (and the container rows nested inside the
 * Pods panel — see ajax/pods.php). All actions go through PodmanClient,
 * i.e. the real libpod REST API over podman.sock; nothing here shells out.
 *
 * Actions (?action=...):
 *   list      GET  -> normalized array of containers for the table view
 *   inspect   GET  (&id=...) -> raw inspect JSON, for a detail dialog
 *   start     POST {"id": "..."}
 *   stop      POST {"id": "...", "timeout": 10}
 *   restart   POST {"id": "...", "timeout": 10}
 *   remove    POST {"id": "...", "force": false}
 *   logs      GET  (&id=...&tail=200) -> plain text
 */

declare(strict_types=1);

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

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

switch ($action) {
    case 'list':
        podman_json_response(containers_list($client));
        break;

    case 'inspect':
        $id = (string) ($_GET['id'] ?? '');
        if ($id === '') {
            podman_json_error('Missing id', 400);
        }
        podman_json_response($client->inspectContainer($id));
        break;

    case 'logs':
        $id = (string) ($_GET['id'] ?? '');
        if ($id === '') {
            podman_json_error('Missing id', 400);
        }
        $tail = (int) ($_GET['tail'] ?? 200);
        podman_json_response(['text' => $client->containerLogs($id, $tail)]);
        break;

    case 'start':
        $body = podman_read_json_body();
        $client->startContainer(require_id($body));
        podman_json_response(['status' => 'started']);
        break;

    case 'stop':
        $body = podman_read_json_body();
        $client->stopContainer(require_id($body), (int) ($body['timeout'] ?? $podmanConfig->stopTimeoutSeconds));
        podman_json_response(['status' => 'stopped']);
        break;

    case 'restart':
        $body = podman_read_json_body();
        $client->restartContainer(require_id($body), (int) ($body['timeout'] ?? $podmanConfig->stopTimeoutSeconds));
        podman_json_response(['status' => 'restarted']);
        break;

    case 'remove':
        $body = podman_read_json_body();
        $client->removeContainer(require_id($body), (bool) ($body['force'] ?? false));
        podman_json_response(['status' => 'removed']);
        break;

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

/** @param array<string,mixed> $body */
function require_id(array $body): string
{
    $id = (string) ($body['id'] ?? '');
    if ($id === '') {
        podman_json_error('Missing id in request body', 400);
    }
    return $id;
}

/**
 * Normalizes libpod's /containers/json entries into exactly what the
 * Containers table (javascript/containers.js) renders — keeping this
 * shaping logic server-side means the frontend never has to know libpod's
 * raw field names/quirks (e.g. Names is an array, State vs Status, etc).
 *
 * @return array<int,array<string,mixed>>
 */
function containers_list(PodmanClient $client): array
{
    $raw = $client->listContainers(true);
    $out = [];

    foreach ($raw as $c) {
        $names = $c['Names'] ?? [];
        $name = is_array($names) && count($names) > 0 ? ltrim((string) $names[0], '/') : podman_short_id((string) ($c['Id'] ?? ''));

        $ports = [];
        foreach (($c['Ports'] ?? []) as $p) {
            if (isset($p['host_port'], $p['container_port'])) {
                $ports[] = "{$p['host_port']}:{$p['container_port']}/" . ($p['protocol'] ?? 'tcp');
            } elseif (isset($p['container_port'])) {
                $ports[] = "{$p['container_port']}/" . ($p['protocol'] ?? 'tcp');
            }
        }

        $startedAt = podman_parse_time($c['StartedAt'] ?? null);
        $state = strtolower((string) ($c['State'] ?? 'unknown'));

        $out[] = [
            'id' => (string) ($c['Id'] ?? ''),
            'shortId' => podman_short_id((string) ($c['Id'] ?? '')),
            'name' => $name,
            'image' => (string) ($c['Image'] ?? ''),
            'state' => $state,
            'status' => (string) ($c['Status'] ?? ''),
            'health' => $c['Health']['Status'] ?? null,
            'ports' => $ports,
            'pod' => $c['Pod'] ?? null,
            'podName' => $c['PodName'] ?? null,
            'uptimeSeconds' => ($state === 'running' && $startedAt !== null) ? (time() - $startedAt) : null,
            'createdAt' => podman_parse_time($c['Created'] ?? null),
        ];
    }

    usort($out, static fn($a, $b) => strcmp($a['name'], $b['name']));
    return $out;
}