<?php

declare(strict_types=1);

use DI\ContainerBuilder;
use Slim\Factory\AppFactory;
use Dotenv\Dotenv;
use App\Middleware\CorsMiddleware;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;
use App\Controllers\CaptchaController;
use App\Controllers\LoginController;
use App\Services\LxdService;
use Zounar\PHPProxy\Proxy;
use App\Utils\LogWriterHelper;

require __DIR__ . '/../vendor/autoload.php';

// 🔹 Load .env config
$dotenv = Dotenv::createImmutable(__DIR__ . '/../');
$dotenv->load();

$domain = $_ENV['MAIN_COOKIE_DOMAIN'] ?? '.lxdapp.local';
session_set_cookie_params([
    'lifetime' => 0,
    'path' => '/',
    'domain' => $domain,
    'secure' => false,  // set true if using HTTPS
    'httponly' => true,
    'samesite' => 'Lax',
]);

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

// Build Container using PHP-DI
$containerBuilder = new ContainerBuilder();
$containerBuilder->useAutowiring(true);   // Enable autowiring globally


// Add settings
$settings = require __DIR__ . '/../src/Settings/Settings.php';
$settings($containerBuilder);

// Add dependencies
$dependencies = require __DIR__ . '/../src/Dependencies/Dependencies.php';
$dependencies($containerBuilder);

// Build the container
$container = $containerBuilder->build();

// Set container to AppFactory
AppFactory::setContainer($container);

// Create App
$app = AppFactory::create();

// 🔹 CORS middleware
$app->add(CorsMiddleware::class);


// Register middleware
(require __DIR__ . '/../src/Bootstrap/Middleware.php')($app);


// Register routes

// API contianer proxy route
$app->group('/api', function ($group) {
    $group->get('/captcha', [CaptchaController::class, 'get']);
    $group->post('/login', [LoginController::class, 'index']);

});

$app->any('/{routes:.*}', function (Request $request, Response $response, array $args) {
    try {
        $mainDomain = $_ENV['MAIN_DOMAIN'] ?? 'lxdapp.local';

        $origin = $request->getHeaderLine('Origin');
        if (!empty($origin)) {
            $domain = parse_url($origin, PHP_URL_HOST);
        } else {
            $domain = $request->getHeaderLine('Host');
        }

        $configPath = __DIR__ . '/../config.json';
        $config = file_exists($configPath) ? json_decode(file_get_contents($configPath), true) : [];
        $name = $config[$domain] ?? null;

        $lxd = new LxdService();

        if (!$name) {
            return jsonResponse($response, ['status' => 'error', 'message' => 'Container does not exist.'], 404);
        }

        if (!$lxd->containerExists($name)) {
            return jsonResponse($response, ['status' => 'error', 'message' => 'Container does not exist.'], 404);
        }

        $containerInfo = $lxd->getContainerState($name);
        $status = $containerInfo['metadata']['status'] ?? 'Stopped';

        if ($status !== 'Running') {
            $redirectUrl = (string) $request->getUri();
            return $response
                ->withHeader('Location', 'app/?auth=ok&redirect=' . urlencode($redirectUrl))
                ->withStatus(302);
        }

        $ip = $lxd->getContainerIP($name);
        if (!$ip) {
            return jsonResponse($response, ['status' => 'error', 'message' => 'Could not fetch container IP'], 500);
        }

        // BEGIN Proxy logic
        $baseUrl = "http://$ip/";
        $uri = $request->getUri();
        $path = $uri->getPath();

        $prefix = '/api/';
        if (strpos($path, $prefix) === 0) {
            $path = substr($path, strlen($prefix));
            if ($path === '') {
                $path = '/';
            }
        }

        $query = $uri->getQuery();
        $targetUrl = $baseUrl . $path . ($query ? '?' . $query : '');

        Proxy::$AUTH_KEY = $_ENV['AUTH_KEY'] ?? 'YOUR_DEFAULT_AUTH_KEY';
        Proxy::$ENABLE_AUTH = true;
        Proxy::$HEADER_HTTP_PROXY_AUTH = 'HTTP_PROXY_AUTH';

        $_SERVER['HTTP_PROXY_AUTH'] = Proxy::$AUTH_KEY;
        $_SERVER['HTTP_PROXY_TARGET_URL'] = $targetUrl;

        $responseCode = Proxy::run();

        LogWriterHelper::write($name, $targetUrl);

        return $response;
    } catch (\Throwable $e) {
        return jsonResponse($response, [
            'status' => 'error',
            'message' => 'Internal Server Error: ' . $e->getMessage()
        ], 500);
    }
});

/**
 * JSON response helper
 */
function jsonResponse(Response $response, array $data, int $status = 200): Response {
    $payload = json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
    $response->getBody()->write($payload);

    return $response
        ->withHeader('Content-Type', 'application/json')
        ->withHeader('Access-Control-Allow-Origin', '*')
        ->withStatus($status);
}

// Run app
$app->run();