<?php
declare(strict_types=1);

function isLocalDevelopmentRequest(): bool
{
    $host = strtolower((string) ($_SERVER['HTTP_HOST'] ?? ''));
    $host = preg_replace('/:\d+$/', '', $host) ?? $host;
    $remoteAddr = strtolower((string) ($_SERVER['REMOTE_ADDR'] ?? ''));

    $localHosts = ['localhost', '127.0.0.1', '::1'];
    $localAddresses = ['127.0.0.1', '::1', ''];

    return in_array($host, $localHosts, true) && in_array($remoteAddr, $localAddresses, true);
}

function applyLocalDevLoginBypass(): void
{
    if (!isLocalDevelopmentRequest()) {
        return;
    }

    if ((string) ($_GET['dev_logout'] ?? '') === '1') {
        unset($_SESSION['user_id'], $_SESSION['username'], $_SESSION['role']);
        return;
    }

    if (isset($_SESSION['user_id']) || (string) ($_GET['dev_login'] ?? '') !== '1') {
        return;
    }

    try {
        $cfg = require __DIR__ . '/../config/database.php';
        $pdo = new PDO(
            sprintf('mysql:host=%s;dbname=%s;charset=%s', $cfg['host'], $cfg['dbname'], $cfg['charset'] ?? 'utf8mb4'),
            $cfg['user'],
            $cfg['pass'],
            [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC]
        );

        $stmt = $pdo->query("
            SELECT `id`, `username`, `role`
            FROM `app_users`
            WHERE `is_active` = 1
              AND `role` IN ('master', 'admin')
            ORDER BY CASE WHEN `role` = 'master' THEN 0 ELSE 1 END, `id` ASC
            LIMIT 1
        ");
        $user = $stmt->fetch();

        if (is_array($user)) {
            $_SESSION['user_id'] = (int) $user['id'];
            $_SESSION['username'] = (string) $user['username'];
            $_SESSION['role'] = (string) $user['role'];
        }
    } catch (Throwable $e) {
        return;
    }
}

function currentUserRole(): string
{
    return trim((string) ($_SESSION['role'] ?? ''));
}

function isMasterRole(?string $role): bool
{
    return trim((string) $role) === 'master';
}

function isAdminLikeRole(?string $role): bool
{
    $normalizedRole = trim((string) $role);

    return $normalizedRole === 'admin' || $normalizedRole === 'master';
}

function currentUserIsAdminLike(): bool
{
    return isAdminLikeRole(currentUserRole());
}

function publicAccessAllowlist(): array
{
    return [
        'login.php',
        'register.php',
        'logout.php',
    ];
}

function currentPublicPageKey(): string
{
    $scriptName = str_replace('\\', '/', (string) ($_SERVER['SCRIPT_NAME'] ?? ''));
    $scriptName = ltrim($scriptName, '/');

    if ($scriptName === '') {
        return '';
    }

    $publicMarker = 'public/';
    $publicPosition = strpos($scriptName, $publicMarker);
    if ($publicPosition !== false) {
        return substr($scriptName, $publicPosition + strlen($publicMarker));
    }

    return $scriptName;
}

function manageablePublicPages(): array
{
    return [
        'index.php' => 'Startseite',
        'settings.php' => 'Einstellungen',
        'my_favorites.php' => 'Favoriten',
        'moonphase.php' => 'Mondphase',
        'planetensichtbarkeit.php' => 'Planetensichtbarkeit',
        'ephemeriden.php' => 'Ephemeriden',
        'comets.php' => 'Kometen',
        'astronomical_conversions.php' => 'Astronomical Conversions',
        'tcrb_lightcurve.php' => 'T CrB Lichtkurve',
        'solarsystem.php' => 'Sonnensystem',
        'mars.php' => 'Mars',
        'jupitersystem.php' => 'Jupitersystem',
        'tagbogen.php' => 'Tagbogen',
        'daemmerungszeiten.php' => 'Dämmerungszeiten',
        'sternenhimmel.php' => 'Sternenhimmel',
        'drehbare_sternkarte.php' => 'Drehbare Sternkarte',
        'meteorshowers.php' => 'Meteorströme',
        'geocron/index.php' => 'Geocron',
        'geocron3d.php' => 'Geocron 3D',
        'geocron3d_C.php' => 'Geocron 3D Cesium',
        'mondfinsternis.php' => 'Mondfinsternis',
        'sonnenfinsternis.php' => 'Sonnenfinsternis',
        'bedeckung.php' => 'Bedeckungsphänomene',
        'sternbedeckungen.php' => 'Mond-Stern-Bedeckungen',
        'monatsvorhersage.php' => 'Monatsvorhersage',
        'moonyear.php' => 'Mondphasen-Jahresübersicht',
        'wochenvorhersage.php' => 'Wochenvorhersage',
        'satellitenhimmel.php' => 'Satellitenhimmel',
        'asteroid_temp.php' => 'Asteroid-Temperatur',
        'universesandbox.php' => 'Universe Sandbox',
        'barycenter.php' => 'Baryzentrum',
    ];
}