<?php

namespace App\Livewire\Services;

use Livewire\Attributes\Layout;
use Livewire\Attributes\On;
use Livewire\Attributes\Title;
use Livewire\Component;

#[Layout('layouts.app')]
#[Title('Dienste — Clusev')]
class Index extends Component
{
    /** active server (mock until the multi-server switcher + SSH layer land) */
    public string $server = 'web-01';

    /** wire:model search over service name + description */
    public string $search = '';

    /**
     * Mock systemd units for the active server. Replaced by the SSH layer
     * (systemctl list-units / show) via SshClient later.
     *
     * @var array<int, array{name:string,status:string,desc:string,enabled:bool}>
     */
    public array $services = [];

    /**
     * Mock journalctl tail. Replaced by a streamed `journalctl -n … -f` read later.
     *
     * @var array<int, array{time:string,unit:string,level:string,text:string}>
     */
    public array $journal = [];

    public function mount(): void
    {
        $this->services = [
            ['name' => 'nginx.service',        'status' => 'online',  'enabled' => true,  'desc' => 'A high performance web server and a reverse proxy server'],
            ['name' => 'mariadb.service',      'status' => 'online',  'enabled' => true,  'desc' => 'MariaDB 11 database server'],
            ['name' => 'redis-server.service', 'status' => 'online',  'enabled' => true,  'desc' => 'Advanced key-value store'],
            ['name' => 'php8.3-fpm.service',   'status' => 'warning', 'enabled' => true,  'desc' => 'The PHP 8.3 FastCGI Process Manager'],
            ['name' => 'ssh.service',          'status' => 'online',  'enabled' => true,  'desc' => 'OpenBSD Secure Shell server'],
            ['name' => 'cron.service',         'status' => 'online',  'enabled' => true,  'desc' => 'Regular background program processing daemon'],
            ['name' => 'fail2ban.service',     'status' => 'offline', 'enabled' => false, 'desc' => 'Ban hosts that cause multiple authentication errors'],
            ['name' => 'docker.service',       'status' => 'online',  'enabled' => true,  'desc' => 'Docker Application Container Engine'],
            ['name' => 'systemd-timesyncd.service', 'status' => 'online', 'enabled' => true, 'desc' => 'Network Time Synchronization'],
            ['name' => 'rsyslog.service',      'status' => 'warning', 'enabled' => true,  'desc' => 'System Logging Service'],
        ];

        $this->journal = [
            ['time' => 'Jun 12 09:41:07', 'unit' => 'nginx',        'level' => 'info',  'text' => 'Reloading nginx configuration'],
            ['time' => 'Jun 12 09:41:07', 'unit' => 'nginx',        'level' => 'info',  'text' => 'signal process started'],
            ['time' => 'Jun 12 09:40:55', 'unit' => 'php8.3-fpm',   'level' => 'warn',  'text' => '[pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers)'],
            ['time' => 'Jun 12 09:40:31', 'unit' => 'systemd',      'level' => 'info',  'text' => 'Started php8.3-fpm.service - The PHP 8.3 FastCGI Process Manager.'],
            ['time' => 'Jun 12 09:40:30', 'unit' => 'systemd',      'level' => 'info',  'text' => 'Stopping php8.3-fpm.service - The PHP 8.3 FastCGI Process Manager...'],
            ['time' => 'Jun 12 09:39:18', 'unit' => 'fail2ban',     'level' => 'error', 'text' => 'Failed to start fail2ban.service - exit code 255'],
            ['time' => 'Jun 12 09:39:18', 'unit' => 'fail2ban',     'level' => 'error', 'text' => 'Found no accessible config files for "filter sshd"'],
            ['time' => 'Jun 12 09:38:02', 'unit' => 'mariadb',      'level' => 'info',  'text' => "mariadbd: ready for connections. Version: '11.4.2-MariaDB' socket: '/run/mysqld/mysqld.sock' port: 3306"],
            ['time' => 'Jun 12 09:37:44', 'unit' => 'rsyslog',      'level' => 'warn',  'text' => 'imjournal: journal files changed, reloading...'],
            ['time' => 'Jun 12 09:36:09', 'unit' => 'sshd',         'level' => 'info',  'text' => 'Accepted publickey for admin from 10.10.90.10 port 51422 ssh2'],
            ['time' => 'Jun 12 09:35:51', 'unit' => 'redis-server', 'level' => 'info',  'text' => 'Background saving terminated with success'],
            ['time' => 'Jun 12 09:35:00', 'unit' => 'cron',         'level' => 'info',  'text' => '(root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)'],
        ];
    }

    /**
     * Service control (R5): opens the wire-elements/modal confirm dialog. The
     * modal writes the AuditEvent and re-dispatches `serviceConfirmed`, which
     * applyService() handles. SSH exec (systemctl) is wired in behind this later.
     */
    public function confirm(string $op, string $name): void
    {
        [$heading, $phrase, $label, $action, $icon] = match ($op) {
            'start' => ['Dienst starten', 'wird gestartet', 'Starten', 'service.start', 'power'],
            'stop' => ['Dienst stoppen', 'wird gestoppt', 'Stoppen', 'service.stop', 'power'],
            default => ['Dienst neu starten', 'wird neu gestartet', 'Neu starten', 'service.restart', 'rotate'],
        };

        $this->dispatch('openModal',
            component: 'modals.confirm-action',
            arguments: [
                'heading' => $heading,
                'body' => "{$name} {$phrase}. Ausgeführt über systemctl auf {$this->server}.",
                'confirmLabel' => $label,
                'danger' => $op === 'stop',
                'icon' => $icon,
                'auditAction' => $action,
                'auditTarget' => "{$name} · {$this->server}",
                'event' => 'serviceConfirmed',
                'params' => ['op' => $op, 'name' => $name],
                'notify' => "{$name}: {$label} ausgeführt.",
            ],
        );
    }

    /** Applies the confirmed service state change (mock until SSH exec lands). */
    #[On('serviceConfirmed')]
    public function applyService(string $op, string $name): void
    {
        foreach ($this->services as $i => $svc) {
            if ($svc['name'] === $name) {
                $this->services[$i]['status'] = $op === 'stop' ? 'offline' : 'online';
            }
        }
    }

    /** @return array<int, array{name:string,status:string,desc:string,enabled:bool}> */
    public function getFilteredServicesProperty(): array
    {
        $q = trim(mb_strtolower($this->search));

        if ($q === '') {
            return $this->services;
        }

        return array_values(array_filter(
            $this->services,
            fn (array $s): bool => str_contains(mb_strtolower($s['name']), $q)
                || str_contains(mb_strtolower($s['desc']), $q)
        ));
    }

    public function render()
    {
        return view('livewire.services.index');
    }
}