<?php

namespace App\Console\Commands;

use App\Models\MailUser;
use Illuminate\Console\Command;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

class UpdateMailboxStats extends Command
{
    protected $signature = 'mail:update-stats {--user=}';
    protected $description = 'Aktualisiert Mailquota und Nachrichtenzahl für alle Mailboxen (oder einen Benutzer)';

    public function handle(): int
    {
        $q = MailUser::query()
            ->where('is_active', true)
            // sichere Filter: E-Mail vorhanden und enthält genau ein "@"
            ->whereNotNull('email')
            ->where('email', 'like', '%@%');

        if ($email = trim((string)$this->option('user'))) {
            $q->where('email', $email);
        }

        $users = $q->get();
        if ($users->isEmpty()) {
            $this->warn('Keine passenden Mailboxen gefunden.');
            return self::SUCCESS;
        }

        foreach ($users as $u) {
            $email = trim($u->email);
            if (!preg_match('/^[^@\s]+@[^@\s]+\.[^@\s]+$/', $email)) {
                // still und leise überspringen – kein „Überspringe @“ mehr
                continue;
            }

            [$local, $domain] = explode('@', $email, 2);
            $maildir = "/var/mail/vhosts/{$domain}/{$local}";

            // 1) Größe in Bytes (rekursiv; ohne "du")
            $usedBytes = 0;
            if (is_dir($maildir)) {
                $it = new RecursiveIteratorIterator(
                    new RecursiveDirectoryIterator($maildir, \FilesystemIterator::SKIP_DOTS)
                );
                foreach ($it as $file) {
                    if ($file->isFile()) {
                        $usedBytes += $file->getSize();
                    }
                }
            }

            // 2) Message-Count = Dateien in cur/ + new/
            $messageCount = 0;
            foreach (['cur', 'new'] as $sub) {
                $dir = "{$maildir}/{$sub}";
                if (is_dir($dir)) {
                    $dh = opendir($dir);
                    if ($dh) {
                        while (($fn = readdir($dh)) !== false) {
                            // echte Maildir-Dateien haben keinen führenden Punkt
                            if ($fn !== '.' && $fn !== '..' && $fn[0] !== '.') {
                                $messageCount++;
                            }
                        }
                        closedir($dh);
                    }
                }
            }

            // Update DB
            $u->forceFill([
                'used_bytes'        => $usedBytes,
                'message_count'     => $messageCount,
                'stats_refreshed_at'=> now(),
            ])->save();

            $this->line(sprintf(
                "%-35s  %7.1f MiB  %5d msgs",
                $email,
                $usedBytes / 1024 / 1024,
                $messageCount
            ));
        }

        $this->info('Mailbox-Statistiken aktualisiert.');
        return self::SUCCESS;
    }
}