<?php
declare(strict_types=1);

// boot application (config, autoload, services)
require_once __DIR__ . '/../config/fileload.php';

// Access-Protection (Basic Auth)
$uriPath = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?: '/';
$uriPath = preg_replace('~/{2,}~', '/', $uriPath);
$uriPath = trim($uriPath, '/');
$isRetoolPath = ($uriPath === 'retool' || str_starts_with($uriPath, 'retool/'));
if (defined('APP_BASIC_AUTH') && APP_BASIC_AUTH && !$isRetoolPath) {
    $authUser = getenv('STAGING_AUTH_USER') ?: 'staging';
    $authPass = getenv('STAGING_AUTH_PASS') ?: 'staging123';
    $user = $_SERVER['PHP_AUTH_USER'] ?? null;
    $pass = $_SERVER['PHP_AUTH_PW'] ?? null;
    if ($user !== $authUser || $pass !== $authPass) {
        header('WWW-Authenticate: Basic realm="Staging"');
        header('HTTP/1.0 401 Unauthorized');
        echo 'Unauthorized';
        exit;
    }
}

// OIDC Auth
$publicPaths = [
    'auth/login',
    'auth/callback',
    'auth/logout',
    'module/pi_control/terminal_info',
];
if (defined('APP_AUTH_ENABLED') && APP_AUTH_ENABLED && !in_array($uriPath, $publicPaths, true)) {
    $user = auth_user();
    if (!$user) {
        header('Location: /auth/login', true, 302);
        exit;
    }
}

// Sicherheitscheck
if (str_contains($uriPath, '..')) {
    http_response_code(400);
    exit('Bad request');
}

// Basispfad fuer Landingpages
$pagesBase = realpath(__DIR__ . '/../partials/landingpages') ?: (__DIR__ . '/../partials/landingpages');
$page404 = $pagesBase . '/errorpages/404.php';

// Spezialrouten für Module
if (str_starts_with($uriPath, 'modules/install')) {
    $target = $pagesBase . '/modules/install.php';
} elseif (str_starts_with($uriPath, 'modules/setup/')) {
    $_GET['module'] = trim(substr($uriPath, strlen('modules/setup/')), '/');
    $target = $pagesBase . '/modules/setup.php';
} elseif ($uriPath === 'auth/login') {
    $target = $pagesBase . '/auth/login.php';
} elseif ($uriPath === 'auth/callback') {
    $target = $pagesBase . '/auth/callback.php';
} elseif ($uriPath === 'auth/logout') {
    $target = $pagesBase . '/auth/logout.php';
} elseif ($uriPath === 'settings') {
    $target = $pagesBase . '/users/settings.php';
} elseif ($uriPath === 'users') {
    $target = $pagesBase . '/users/index.php';
} elseif ($uriPath === 'debug') {
    $target = $pagesBase . '/retool/debug.php';
} elseif (preg_match('~^module/([a-zA-Z0-9_-]+)(?:/(.+))?$~', $uriPath, $m)) {
    $module = $m[1];
    $page = isset($m[2]) && $m[2] !== '' ? trim($m[2], '/') : 'index';
    $modulePage = app()->modules()->resolvePage($module, $page);
    if ($modulePage) {
        $target = $modulePage;
    } else {
        http_response_code(404);
        $target = $page404;
    }
} elseif ($uriPath === '' || $uriPath === 'index' || $uriPath === 'index.php') {
    $target = $pagesBase . '/index.php';
} else {
    $base = $pagesBase . '/' . $uriPath;
    // 1) Verzeichnis mit index.php
    if (is_dir($base) && is_file($base . '/index.php')) {
        $target = $base . '/index.php';
    }
    // 2) Datei
    elseif (is_file($base . '.php')) {

        $target = $base . '.php';
    }
    // 3) 404
    elseif (is_file($base)) {

        $target = $base;
    }
    // 3) 404
    else {
        http_response_code(404);
        $target = $page404;
    }
}
// ------------------------------------
// Layout-Regel
// ------------------------------------
$skipLayout = false;
$targetReal = realpath($target);
$retoolBase = realpath($pagesBase . '/retool/raw');

// Beispiel: alles unter landingpages/retool/* ohne Layout
if ($targetReal && $retoolBase && str_starts_with($targetReal, $retoolBase)) {
    $skipLayout = true;
}

// ------------------------------------
// Ausgabe
// ------------------------------------
// Erst Inhalt laden (ohne Ausgabe), damit Header/Redirects vor HTML funktionieren
ob_start();
try {
    require $target;
    $content = ob_get_clean();
} catch (\App\ModuleConfigException $e) {
    ob_end_clean();
    http_response_code(412);
    $moduleName = $e->module();
    $module = app()->modules()->get($moduleName);
    $title = $module['title'] ?? $moduleName;
    $setupUrl = '/modules/setup/' . rawurlencode($moduleName);
    $content = '<div class="card">' .
        '<div class="pill">' . e($title) . '</div>' .
        '<h1 style="margin-top:.75rem;">Setup erforderlich</h1>' .
        '<p class="muted">' . e($e->getMessage()) . '</p>' .
        '<div style="margin-top:1rem;"><a class="nav-link" href="' . e($setupUrl) . '">Zum Setup</a></div>' .
        '</div>';
}

// Wenn bereits Header gesendet wurden (z. B. eigener Redirect/Content-Type), Layout überspringen
if (headers_sent()) {
    $skipLayout = true;
}

if (!$skipLayout) {
    tpl('layout_start', 'structure');
}

echo $content;

if (!$skipLayout) {
    tpl('layout_end', 'structure');
}