<?php
// === Handle API requests ===
$requestUri = $_SERVER['REQUEST_URI'];
if (str_starts_with($requestUri, '/api/')) {
    require __DIR__ . '/api/public/index.php';
    exit;
}

// === Setup ===
require __DIR__ . "/api/vendor/autoload.php";
require __DIR__ . "/api/src/Services/LxdService.php";

use Dotenv\Dotenv;
use Zounar\PHPProxy\Proxy;
use App\Services\LxdService;
// 🔹 Load .env config
$dotenv = Dotenv::createImmutable(__DIR__ . '/api/');
$dotenv->load();

$host = $_SERVER['HTTP_HOST'] ?? '';
$method = $_SERVER['REQUEST_METHOD'];

// Load container mapping from domain config
$config = json_decode(file_get_contents(__DIR__ . '/api/config.json'), true);
$container = $config[$host] ?? null;
$lxd = new LxdService();

// === Helper URLs ===
$redirectBase = parseUrl("$host/app");
// === If container is missing or invalid ===
if (!$container || !$lxd->containerExists($container)) {
    redirect($redirectBase);
}

// === Check container status ===
$state = $lxd->getContainerState($container)['metadata']['status'] ?? 'Stopped';

if ($state !== 'Running') {
    redirect($redirectBase);
}

// === Get container IP ===
$nginx = $lxd->getContainerServiceStatus($container, 'nginx');
$mysql = $lxd->getContainerServiceStatus($container, 'mariadb');

if ($nginx !== 'active' || $mysql !== 'active') {
    redirect($redirectBase);
}

// === Proxy to container ===
proxy($container, "http://{$host}{$requestUri}");
exit;


// === Functions ===

function redirect(string $to): void {
    header("Location: $to", true, 302);
    exit;
}

function proxy(string $name, string $targetUrl): void {
    Proxy::$ENABLE_AUTH = false;
    Proxy::$HEADER_HTTP_PROXY_AUTH = 'HTTP_PROXY_AUTH';

    $_SERVER['HTTP_PROXY_TARGET_URL'] = $targetUrl;

    $responseCode = Proxy::run();
    touch($_ENV['STATEDIR']."/".$name);
 
}

function getFullUrl(): string {
    $protocol = (!empty($_SERVER['HTTPS']) || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
    $host = $_SERVER['HTTP_HOST'] ?? $_SERVER['SERVER_NAME'];
    return $protocol . $host . $_SERVER['REQUEST_URI'];
}

function parseUrl(string $url = ''): string {
    $scheme = $_SERVER['REQUEST_SCHEME'] ?? 'http';
    return "$scheme://$url";
}

function writeLog(string $name, string $uri): void {
    $logDir = __DIR__ . '/api/public/last-access-logs';

    if (!is_dir($logDir)) {
        mkdir($logDir, 0777, true);
    }

    $logLine = date("Y-m-d H:i:s") . " : " . $uri . "\n";
    file_put_contents("$logDir/$name.txt", $logLine, FILE_APPEND);
}