Install CiteRoute Telemetry

import { NextResponse } from 'next/server';
import type { NextRequest, NextFetchEvent } from 'next/server';

const CITEROUTE_ENDPOINT = 'https://www.citeroute.com/api/v1/track';
const YOUR_DOMAIN = 'yourdomain.com'; // Replace with your domain

const AI_BOTS = [
  'gptbot', 'claudebot', 'perplexitybot', 'bytespider', 'oai-searchbot',
  'applebot-extended', 'google-extended', 'diffbot', 'cohere-ai', 'anthropic-ai'
];

export function middleware(request: NextRequest, event: NextFetchEvent) {
  const ua = (request.headers.get('user-agent') || '').toLowerCase();
  const referer = request.headers.get('referer') || '';
  const isAiCrawler = AI_BOTS.some(bot => ua.includes(bot));
  const isAiReferral = /chatgpt|perplexity|claude|gemini|copilot/i.test(referer);

  // If non-human or AI referral, capture telemetry in background
  if (isAiCrawler || isAiReferral) {
    event.waitUntil(
      fetch(CITEROUTE_ENDPOINT, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'x-forwarded-user-agent': request.headers.get('user-agent') || '',
          'x-forwarded-referer': referer,
        },
        body: JSON.stringify({
          domain: YOUR_DOMAIN,
          path: request.nextUrl.pathname,
        }),
      }).catch(() => {})
    );
  }

  // Attach diagnostic header so CiteRoute Verifier detects your middleware
  const response = NextResponse.next();
  response.headers.set('x-citeroute-tracked', '1');
  return response;
}

export const config = {
  matcher: ['/((?!api/|_next/static|_next/image|favicon.ico|robots.txt).*)'],
};