function checkImgExists(imgSrc) {
    var ImgObj = new Image();
    ImgObj.src = imgSrc;
    if (ImgObj.fileSize > 0 || (ImgObj.width > 0 && ImgObj.height > 0)) {
        return true;
    } else {
        return false;
    }
}

function Refresh() {
    // Artwork types: "front", "back", "disc", "icon", "artist"
    var coverDefaultURI = "../Spin Disc's/images/no cover.png";
    var coverURI = chrome.webview.hostObjects.sync.foo_uie_webview.getArtwork("front");

    document.getElementById("CoverBg").src = (coverURI.length != 0) ? coverURI : coverDefaultURI;
    document.getElementById("Cover").src = (coverURI.length != 0) ? coverURI : coverDefaultURI;

    var backDefaultURI = "../Spin Disc's/images/no back.png";
    var backURI = chrome.webview.hostObjects.sync.foo_uie_webview.getArtwork("back");

    if (backURI.length != 0) {
        document.getElementById("Back").src = backURI;
    } else {
        if (back_sw.checked) {
            document.getElementById("Back").src = document.getElementById("Cover").src;
        } else {
            document.getElementById("Back").src = backDefaultURI;
        }
    }

    document.getElementById("Mask").src = "../Spin Disc's/images/no mask.png";

    var discDefaultURI = "../Spin Disc's/images/no disc.png";
    var discURI = chrome.webview.hostObjects.sync.foo_uie_webview.getArtwork("disc");

    if (discURI.length != 0) {
        document.getElementById("Disc").src = discURI;
    } else {
        if (disc_sw.checked) {
            document.getElementById("Disc").src = document.getElementById("Cover").src;
            Mask.style.display = "block"; // Mantieni il mask visibile se era visibile
        } else {
            document.getElementById("Disc").src = discDefaultURI;
        }
    }

    var artistDefaultURI = "../Spin Disc's/images/no artist.png";
    var artistURI = chrome.webview.hostObjects.sync.foo_uie_webview.getArtwork("artist");

    if (artistURI.length != 0) {
        document.getElementById("Artist").src = artistURI;
    } else {
        if (artist_sw.checked) {
            document.getElementById("Artist").src = document.getElementById("Cover").src;
        } else {
            document.getElementById("Artist").src = artistDefaultURI;
        }
    }

    var iconDataURI = "../Spin Disc's/images/no icon.png";
    var iconURI = chrome.webview.hostObjects.sync.foo_uie_webview.getArtwork("front");
    var imgPath = chrome.webview.hostObjects.sync.foo_uie_webview.getFormattedText("[$directory_path(%path%)]");

    if (checkImgExists(imgPath + "/icon.png")) {
        document.getElementById("Icon").src = imgPath + "/icon.png";
    } else if (checkImgExists(imgPath + "/icon.jpg")) {
        document.getElementById("Icon").src = imgPath + "/icon.jpg";
    } else if (checkImgExists(imgPath + "/icon.gif")) {
        document.getElementById("Icon").src = imgPath + "/icon.gif";
    } else if (checkImgExists(imgPath + "/icon.webp")) {
        document.getElementById("Icon").src = imgPath + "/icon.webp";
    } else if (checkImgExists(imgPath + "/icon.jpeg")) {
        document.getElementById("Icon").src = imgPath + "/icon.jpeg";
    } else {
        document.getElementById("Icon").src = (iconURI.length != 0) ? iconURI : iconDataURI;
    }
   
    if (audio_sw.checked) {
        Spectrum.style.display = "block";
    } else {
        Spectrum.style.display = "none";
    }
}

function changeColor() {
    if (document.getElementsByName("isColor")[0].checked) {
        bgCover.style.display = "none";
        document.body.style.backgroundColor = "#212121";
    } else if (document.getElementsByName("isColor")[1].checked) {
        bgCover.style.display = "none";
        document.body.style.backgroundColor = "transparent";
    } else if (document.getElementsByName("isColor")[2].checked) {
        bgCover.style.display = "block";
        document.body.style.backgroundColor = "transparent";
    } else if (document.getElementsByName("isColor")[3].checked) {
        bgCover.style.display = "none";
        document.body.style.backgroundColor = Col_P.value;
    }
}

/****The following is the expansion of the taste-resolving stone****/
Refresh();

var Mask_element = document.getElementById("Mask");
Mask_element.addEventListener("dblclick", function(event) {
    Mask.style.display = "none";
});

var Disc_element = document.getElementById("Disc");
Disc_element.addEventListener("dblclick", function(event) {
    Mask.style.display = "block";
});

var cover_element = document.getElementById("slideshow");
cover_element.addEventListener("dblclick", function(event) {
    if (lun_time > 0) {
        opacity_jsq -= 0.1;
        if (opacity_jsq <= 0.1) opacity_jsq = 1;
        if (Cover.style.opacity > 0) Cover.style.opacity = opacity_jsq.toFixed(1);
        if (Back.style.opacity > 0) Back.style.opacity = opacity_jsq.toFixed(1);
        if (Artist.style.opacity > 0) Artist.style.opacity = opacity_jsq.toFixed(1);
        document.getElementById("Cal_y").value = opacity_jsq.toFixed(1);
    } else {
        images[currentImage].style.opacity = 0;
        currentImage = (currentImage + 1) % images.length;
        images[currentImage].style.opacity = cover_opacity; // opacity_jsq.toFixed(1);
    }
});

var icon_element = document.getElementById("Icon");
var icon_jsq = 0;
icon_element.addEventListener("click", function(event) {
    icon_jsq += 1;
    if (icon_jsq == 2) icon_jsq = 0;
    if (icon_jsq == 1) config.style.display = "block";
    else config.style.display = "none";
});