function unity_webgl_full_shortcode($atts) {
    $atts = shortcode_atts(array(
        'id' => 'unityContainer',
        'width' => '960px',
        'height' => '600px',
        'build_url' => '', // URL completo della cartella Build
        'loader' => 'w3.loader.js',
        'callback' => '' // Nome della funzione JS da chiamare dopo il caricamento
    ), $atts, 'unity_webgl_full');

    if(empty($atts['build_url'])) return 'Errore: build_url non specificato.';

    $html = '<div id="unity-container" style="width:'.$atts['width'].'; height:'.$atts['height'].'">
        <canvas id="unity-canvas" width="400" height="300" tabindex="-1"></canvas>
        <div id="unity-loading-bar">
            <div id="unity-logo"></div>
            <div id="unity-progress-bar-empty">
                <div id="unity-progress-bar-full"></div>
            </div>
        </div>
        <div id="unity-warning"></div>
        <div id="unity-footer">
            <div id="unity-logo-title-footer"></div>
            <div id="unity-fullscreen-button"></div>
            <div id="unity-build-title">Without 3</div>
        </div>
    </div>';

    $html .= '<script>
        var canvas = document.querySelector("#unity-canvas");

        function unityShowBanner(msg, type) {
            var warningBanner = document.querySelector("#unity-warning");
            function updateBannerVisibility() {
                warningBanner.style.display = warningBanner.children.length ? "block" : "none";
            }
            var div = document.createElement("div");
            div.innerHTML = msg;
            warningBanner.appendChild(div);
            if (type=="error") div.style="background:red;padding:10px;";
            else {
                if(type=="warning") div.style="background:yellow;padding:10px;";
                setTimeout(function(){ warningBanner.removeChild(div); updateBannerVisibility(); },5000);
            }
            updateBannerVisibility();
        }

        var buildUrl = "'.esc_url(trailingslashit($atts["build_url"])).'";
        var loaderUrl = buildUrl + "'.$atts["loader"].'";
        var config = {
            arguments: [],
            dataUrl: buildUrl + "w3.data",
            frameworkUrl: buildUrl + "w3.framework.js",
            codeUrl: buildUrl + "w3.wasm",
            streamingAssetsUrl: "StreamingAssets",
            companyName: "Fantogame",
            productName: "Without 3",
            productVersion: "4",
            showBanner: unityShowBanner
        };

        if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {
            var meta=document.createElement("meta");
            meta.name="viewport";
            meta.content="width=device-width,height=device-height,initial-scale=1.0,user-scalable=no,shrink-to-fit=yes";
            document.getElementsByTagName("head")[0].appendChild(meta);
            document.querySelector("#unity-container").className="unity-mobile";
            canvas.className="unity-mobile";
        } else {
            canvas.style.width="'.$atts['width'].'";
            canvas.style.height="'.$atts['height'].'";
        }

        document.querySelector("#unity-loading-bar").style.display="block";

        var script=document.createElement("script");
        script.src=loaderUrl;
        script.onload=() => {
            createUnityInstance(canvas, config, (progress) => {
                document.querySelector("#unity-progress-bar-full").style.width=100*progress+"%";
            }).then((unityInstance)=>{
                document.querySelector("#unity-loading-bar").style.display="none";
                document.querySelector("#unity-fullscreen-button").onclick = () => { unityInstance.SetFullscreen(1); };

                // Chiama la funzione JS passata come callback se esiste
                if("'.esc_js($atts["callback"]).'" && typeof window["'.esc_js($atts["callback"]).'"] === "function") {
                    window["'.esc_js($atts["callback"]).'"](unityInstance);
                }

            }).catch((message)=>{alert(message);});
        };
        document.body.appendChild(script);
    </script>';

    return $html;
}
add_shortcode('unity_webgl_full', 'unity_webgl_full_shortcode');