<?php
use App\Database;
use App\Repository\KeaHostRepository;
use App\Repository\KeaHostMetadataRepository;

$module = modules()->get('kea');
$fallback = $module['db_defaults'] ?? [];

$settings = modules()->settings('kea');
$metadataFallback = is_array($module['metadata_db_defaults'] ?? null) ? $module['metadata_db_defaults'] : [];
$metadataConfig = is_array($settings['metadata_db'] ?? null)
    ? array_replace($metadataFallback, $settings['metadata_db'])
    : $metadataFallback;
$metadataRepo = null;
$hosts = [];
$error = null;
$warnings = [];
$stats = [
    'total' => 0,
    'reservations' => 0,
    'leases' => 0,
    'groups' => [],
    'free_ips' => [],
];

try {
    $pdo = modules()->modulePdo('kea', $fallback);
    if (!empty($metadataConfig['driver']) && !empty($metadataConfig['dbname'])) {
        try {
            $metadataRepo = new KeaHostMetadataRepository(Database::createFromArray($metadataConfig));
            $metadataRepo->ensureSchema();
        } catch (\Throwable $e) {
            $warnings[] = 'Nexus DHCP Zusatzdatenbank nicht verfuegbar: ' . $e->getMessage();
            $metadataRepo = null;
        }
    }

    $repo = new KeaHostRepository($pdo, $metadataRepo);
    $hosts = $repo->findAll(200);
    $stats['reservations'] = $repo->countReservations();
    $stats['leases'] = $repo->countLeases();
    $stats['total'] = $stats['reservations'] + $stats['leases'];
    foreach ($hosts as $host) {
        $group = trim((string)($host['metadata']['group_name'] ?? ''));
        if ($group !== '') {
            $stats['groups'][$group] = ($stats['groups'][$group] ?? 0) + 1;
        }
    }
    if ($metadataRepo !== null) {
        $stats['free_ips'] = array_map(
            static fn(array $ips): int => count($ips),
            $metadataRepo->availableIpsByGroup(
                array_merge($repo->usedIpAddresses(), $metadataRepo->desiredIps()),
                4096
            )
        );
    }
} catch (\Exception $e) {
    $error = "Datenbankfehler: " . $e->getMessage();
}

module_tpl('kea', 'dashboard', compact('hosts', 'error', 'warnings', 'stats'));