$(document).ready(function() {

    async function getFingerprint() {
        const data = {
            ua: navigator.userAgent,
            lang: navigator.language,
            depth: screen.colorDepth,
            res: `${screen.width}x${screen.height}`,
            tz: Intl.DateTimeFormat().resolvedOptions().timeZone,
            cores: navigator.hardwareConcurrency || 'unknown',
            mem: navigator.deviceMemory || 'unknown',
            
            canvas: getCanvasFingerprint()
        };

        const msgUint8 = new TextEncoder().encode(JSON.stringify(data));
        const hashBuffer = await crypto.subtle.digest('SHA-256', msgUint8);
        const hashArray = Array.from(new Uint8Array(hashBuffer));
        return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
    }

    function getCanvasFingerprint() {
        const canvas = document.createElement('canvas');
        const ctx = canvas.getContext('2d');
        canvas.width = 200;
        canvas.height = 50;
        
        ctx.textBaseline = "top";
        ctx.font = "14px 'Arial'";
        ctx.fillStyle = "#f60";
        ctx.fillRect(125, 1, 62, 20);
        ctx.fillStyle = "#069";
        ctx.fillText("Fingerprint <canvas> 1.0", 2, 15);
        ctx.fillStyle = "rgba(102, 204, 0, 0.7)";
        ctx.fillText("Fingerprint <canvas> 1.0", 4, 17);
        
        return canvas.toDataURL();
    }

    function setCookie(name, value, days) {
        const d = new Date();
        d.setTime(d.getTime() + (days * 24 * 60 * 60 * 1000));
        const expires = "expires=" + d.toUTCString();
        document.cookie = `${name}=${value}; ${expires}; path=/; SameSite=Lax; Secure=true`;
    }

    getFingerprint().then(id => {
        setCookie("fingerprint", id, 1);
    });

});
