<?php

$umamiHost = 'https://stats.apps.coryd.dev';
$requestUri = $_SERVER['REQUEST_URI'];
$method = $_SERVER['REQUEST_METHOD'];
$proxyPrefix = '/assets/scripts';
$forwardPath = parse_url($requestUri, PHP_URL_PATH);
$forwardPath = str_replace($proxyPrefix, '', $forwardPath);
$targetUrl = $umamiHost . $forwardPath;

if (isset($contentType) && preg_match('#^(application/json|text/|application/javascript)#', $contentType)) {
  ob_start('ob_gzhandler');
} else {
  ob_start();
}

if ($method === 'GET' && preg_match('#^/utils\.js$#', $forwardPath)) {
  $remoteUrl = $umamiHost . '/script.js';
  $cacheKey = 'remote_stats_script';
  $ttl = 3600;
  $js = null;
  $code = 200;
  $redis = null;

  try {
    if (extension_loaded('redis')) {
      $redis = new Redis();
      $redis->connect('127.0.0.1', 6379);

      if ($redis->exists($cacheKey)) $js = $redis->get($cacheKey);
    }
  } catch (Exception $e) {
    error_log("Redis unavailable: " . $e->getMessage());
  }

  if (!is_string($js)) {
    $ch = curl_init($remoteUrl);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, false);

    $js = curl_exec($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    curl_close($ch);

    if ($redis && $code === 200 && $js) $redis->setex($cacheKey, $ttl, $js);
  }

  if (!is_string($js) || trim($js) === '') {
    $js = '// Failed to fetch remote script';
    $code = 502;
  }

  http_response_code($code);
  header('Content-Type: application/javascript; charset=UTF-8');
  header('Cache-Control: public, max-age=60');
  echo $js;
  exit;
}

$headers = [
  'Content-Type: application/json',
  'Accept: application/json',
];

if (isset($_SERVER['HTTP_USER_AGENT'])) $headers[] = 'User-Agent: ' . $_SERVER['HTTP_USER_AGENT'];

$ch = curl_init($targetUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

if ($method === 'POST') {
  $body = file_get_contents('php://input');
  $data = json_decode($body, true);

  if (strpos($forwardPath, '/api/send') === 0 && is_array($data)) $data['payload'] = array_merge($data['payload'] ?? [], [
      'ip' => $_SERVER['REMOTE_ADDR'] ?? '0.0.0.0',
    ]);

  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
} else {
  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
}

$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

curl_close($ch);
http_response_code($httpCode);

if ($contentType) header("Content-Type: $contentType");

echo $response ?: '';