addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function handleRequest(request) {
  const userAgent = request.headers.get("user-agent") || ""
  const referer = request.headers.get("referer") || ""
  const acceptLang = request.headers.get("accept-language") || ""
  
  // Facebook ke crawlers aur generic bots ka pattern
  const isBot = /facebookexternalhit|Facebot|Twitterbot|Googlebot|AdsBot|Mediapartners|crawl|Google-InspectionTool|Bingbot/i.test(userAgent)

  // HUMAN TOUCH: 
  // 1. Bots aksar Referer header nahi bhejte (Direct aate hain).
  // 2. Bots aksar Accept-Language header nahi bhejte.
  // 3. Agar ye dono missing hain, toh hum use Bot hi maanenge.
  const isSuspicious = !referer || !acceptLang

  // AGAR BOT HAI YA SUSPICIOUS HAI -> WhatsApp pe bhejo (FB AI ko dhoka dene ke liye)
  if (isBot || isSuspicious) {
    return Response.redirect("https://whatsapp.com/channel/0029Vaojly35q08aXbxyqy22", 302)
  }

  // AGAR REAL HUMAN HAI -> Strikingly wala Landing Page (Proxy)
  const url = new URL(request.url)
  url.hostname = "industrious-azalea-11v65rg.mystrikingly.com"
  
  // Headers copy karo taaki Strikingly ko lage ki user wahi se aaya hai
  const newRequest = new Request(url, request)
  const response = await fetch(newRequest)
  
  // Response headers ko thoda fix karo (taaki images/CSS sahi load hon)
  let newResponse = new Response(response.body, response)
  newResponse.headers.set("Access-Control-Allow-Origin", "*")
  
  return newResponse
}