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    /**
 * Watt Footprint - Brent Crude price proxy
 *
 * WHAT THIS DOES
 * Your website widget calls this Worker. This Worker calls OilPriceAPI
 * with your secret key, then sends back just the price data. The key
 * never touches the browser, so it can't be copied out of your page source.
 *
 * SETUP (about 10 minutes, no card needed for the free tier)
 * 1. Get a free API key at https://www.oilpriceapi.com
 * 2. Go to https://dash.cloudflare.com, sign up free, click Workers & Pages
 * 3. Create a new Worker, paste this whole file in, replacing the default code
 * 4. In the Worker settings, add an environment variable/secret:
 *    name: OIL_API_KEY
 *    value: (your key from step 1)
 * 5. Deploy. You'll get a URL like:
 *    https://oil-price-proxy.YOUR-SUBDOMAIN.workers.dev
 * 6. Put that URL into the PROXY_URL constant near the top of the widget code
 * 7. In the CORS line below, replace the placeholder with your real website domain
 */

const ALLOWED_ORIGIN = "https://www.wattfootprint.ie"; // change to your real domain

export default {
  async fetch(request, env) {
    // Only allow requests from your own site
    const origin = request.headers.get("Origin") || "";
    const corsHeaders = {
      "Access-Control-Allow-Origin": ALLOWED_ORIGIN,
      "Access-Control-Allow-Methods": "GET",
    };

    if (request.method === "OPTIONS") {
      return new Response(null, { headers: corsHeaders });
    }

    try {
      const apiResponse = await fetch(
        "https://api.oilpriceapi.com/v1/prices/latest?by_code=BRENT_CRUDE_USD",
        {
          headers: {
            Authorization: `Token ${env.OIL_API_KEY}`,
            "Content-Type": "application/json",
          },
        }
      );

      if (!apiResponse.ok) {
        return new Response(
          JSON.stringify({ error: "Could not fetch oil price" }),
          { status: 502, headers: { ...corsHeaders, "Content-Type": "application/json" } }
        );
      }

      const data = await apiResponse.json();

      return new Response(JSON.stringify(data), {
        headers: { ...corsHeaders, "Content-Type": "application/json" },
      });
    } catch (err) {
      return new Response(
        JSON.stringify({ error: "Proxy error" }),
        { status: 500, headers: { ...corsHeaders, "Content-Type": "application/json" } }
      );
    }
  },
};
  
  
Email: info@wattfootprint.com
Phone: (01) 912 5490