<?php

// 0) Umgebung / Domains / Error-Level
require_once __DIR__ . "/config.php";

// -----------------------------------------------------------
// Session starten
// -----------------------------------------------------------
if (php_sapi_name() !== 'cli') {
    if (session_status() === PHP_SESSION_NONE) {

        session_name('usbcheck_session');

        session_set_cookie_params([
            'lifetime' => 0,
            'path'     => '/',
            'domain'   => '',
            'secure'   => (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off'),
            'httponly' => true,
            'samesite' => 'Lax',
        ]);

        session_start();
    }
}

// -----------------------------------------------------------
// 1) Sprache bestimmen (vor dem Laden der JSON-Dateien!)
// -----------------------------------------------------------
$lang = $_GET['lang'] ?? null;

if (is_string($lang)) {
    $lang = strtolower($lang);
    if (!preg_match('/^[a-z]{2}$/', $lang)) {
        $lang = null;
    }
} else {
    $lang = null;
}

// -----------------------------------------------------------
// 2) Verfügbare JSON-Sprachen erkennen
// -----------------------------------------------------------
$i18nDir = __DIR__ . '/../public/assets/i18n';

$langFiles = [];
if (is_dir($i18nDir)) {
    $langFiles = glob($i18nDir . '/*.json') ?: [];
}

$availableLangs = [];

// Alle vorhandenen JSONs einsammeln
foreach ($langFiles as $file) {
    $json = json_decode(@file_get_contents($file), true);
    if (!is_array($json) || !isset($json['meta'])) {
        continue;
    }

    $meta = $json['meta'];

    // Option: nur Sprachen mit enabled=true anzeigen (Template-Dateien rausfiltern)
    if (isset($meta['enabled']) && $meta['enabled'] === false) {
        continue;
    }

    $code = isset($meta['code']) && is_string($meta['code'])
        ? strtolower($meta['code'])
        : strtolower(basename($file, '.json'));

    $availableLangs[$code] = [
        'code'  => $code,
        'label' => $meta['label'] ?? strtoupper($code),
        'flag'  => $meta['flag']  ?? '🏳️',
    ];
}

// Falls keine Sprachdateien gefunden wurden → Minimal-Fallback
if (empty($availableLangs)) {
    $availableLangs = [
        'en' => [
            'code'  => 'en',
            'label' => 'English',
            'flag'  => '🇬🇧',
        ],
    ];
}

// Falls Sprache ungültig oder nicht in available → erste verfügbare Sprache wählen
if (!$lang || !isset($availableLangs[$lang])) {
    $keys = array_keys($availableLangs);
    $lang = $keys[0] ?? 'en';
}

// -----------------------------------------------------------
// 3) Aktive Sprachdatei laden
// -----------------------------------------------------------
$activeLangFile = $i18nDir . '/' . $lang . '.json';
$activeLangData = [];

if (is_readable($activeLangFile)) {
    $json = json_decode(@file_get_contents($activeLangFile), true);
    if (is_array($json)) {
        $activeLangData = $json;
    }
}

// -----------------------------------------------------------
// 4) Fallback-Sprache (EN)
// -----------------------------------------------------------
$fallbackLangData = [];
$fallbackFile     = $i18nDir . '/en.json';

if ($lang !== 'en' && is_readable($fallbackFile)) {
    $json = json_decode(@file_get_contents($fallbackFile), true);
    if (is_array($json)) {
        $fallbackLangData = $json;
    }
}

// -----------------------------------------------------------
// 5) Globale i18n-Struktur bereitstellen
// -----------------------------------------------------------
$GLOBALS['lang']           = $lang;
$GLOBALS['availableLangs'] = $availableLangs;

$GLOBALS['i18n'] = [
    'current'  => $activeLangData,
    'fallback' => $fallbackLangData,
];

// -----------------------------------------------------------
// 6) Rest des Systems laden
// -----------------------------------------------------------
require_once __DIR__ . "/db.php";
require_once __DIR__ . '/../src/functions.php';