(function () {
  if (location.pathname.startsWith("/embed/")) return;

  var s = document.currentScript;
  if (!s) return;

  var project = s.getAttribute("data-project");
  if (!project) return;

  var bg       = s.getAttribute("data-bg")       || "#18181b";
  var fg       = s.getAttribute("data-fg")       || "#ffffff";
  var accent   = s.getAttribute("data-accent")   || "#6366f1";
  var radius   = parseInt(s.getAttribute("data-radius") || "16", 10);
  var position = s.getAttribute("data-position") || "bottom-right";
  var label    = s.getAttribute("data-label")    || "What\u2019s new";

  var isLeft = position === "bottom-left";
  var hEdge  = isLeft ? "left:24px" : "right:24px";

  function luminance(hex) {
    hex = hex.replace("#", "");
    if (hex.length === 3)
      hex = hex[0]+hex[0]+hex[1]+hex[1]+hex[2]+hex[2];
    var r = parseInt(hex.slice(0,2),16)/255;
    var g = parseInt(hex.slice(2,4),16)/255;
    var b = parseInt(hex.slice(4,6),16)/255;
    return 0.299*r + 0.587*g + 0.114*b;
  }
  var overlayBorder = luminance(bg) < 0.5
    ? "rgba(255,255,255,0.08)"
    : "rgba(0,0,0,0.10)";

  var origin;
  try { origin = new URL(s.getAttribute("src") || "").origin; }
  catch(e) { origin = location.origin; }

  var params = new URLSearchParams({
    bg: bg, fg: fg, accent: accent, radius: String(radius),
    ref: location.origin,
  });
  var embedUrl = origin + "/embed/" + encodeURIComponent(project) + "?" + params;

  var style = document.createElement("style");
  style.textContent =
    "#heyemit-btn{" +
      "position:fixed;bottom:24px;" + hEdge + ";z-index:2147483646;" +
      "background:" + accent + ";color:" + fg + ";" +
      "border:none;border-radius:9999px;padding:10px 20px;" +
      "font-size:13px;font-weight:700;letter-spacing:-0.01em;cursor:pointer;" +
      "box-shadow:0 4px 20px rgba(0,0,0,0.25);" +
      "display:flex;align-items:center;gap:7px;" +
      "font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;" +
      "line-height:1;white-space:nowrap;" +
      "transition:transform 0.15s,box-shadow 0.15s;" +
    "}" +
    "#heyemit-btn:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,0,0,0.3);}" +
    "#heyemit-btn:active{transform:translateY(0);}" +
    "#heyemit-overlay{" +
      "position:fixed;bottom:76px;" + hEdge + ";z-index:2147483647;" +
      "width:340px;height:520px;" +
      "border-radius:" + radius + "px;overflow:hidden;" +
      "box-shadow:0 20px 60px rgba(0,0,0,0.35),0 4px 16px rgba(0,0,0,0.12);" +
      "border:1px solid " + overlayBorder + ";" +
      "display:none;opacity:0;transform:translateY(10px) scale(0.98);" +
      "transition:opacity 0.2s ease,transform 0.2s ease;" +
      "transform-origin:" + (isLeft ? "left" : "right") + " bottom;" +
    "}" +
    "#heyemit-overlay.heyemit-open{opacity:1;transform:translateY(0) scale(1);}" +
    "#heyemit-overlay iframe{width:100%;height:100%;border:none;display:block;}";
  document.head.appendChild(style);

  var btn = document.createElement("button");
  btn.id = "heyemit-btn";
  btn.setAttribute("aria-expanded", "false");
  btn.setAttribute("aria-controls", "heyemit-overlay");
  btn.innerHTML =
    '<svg width="13" height="13" viewBox="0 0 13 13" fill="none" ' +
    'xmlns="http://www.w3.org/2000/svg" aria-hidden="true" ' +
    'style="flex-shrink:0;opacity:0.85">' +
    '<path d="M6.5 0.5L7.9 4.6H12.2L8.65 7.15L10.05 11.25L6.5 8.7L2.95 ' +
    '11.25L4.35 7.15L0.8 4.6H5.1L6.5 0.5Z" fill="currentColor"/>' +
    '</svg>' +
    label;
  document.body.appendChild(btn);

  var overlay = document.createElement("div");
  overlay.id = "heyemit-overlay";
  overlay.setAttribute("role", "dialog");
  overlay.setAttribute("aria-modal", "true");
  overlay.setAttribute("aria-label", "Changelog");
  document.body.appendChild(overlay);

  var iframeCreated = false;

  function openOverlay() {
    if (!iframeCreated) {
      var iframe = document.createElement("iframe");
      iframe.src = embedUrl;
      iframe.title = "Changelog";
      overlay.appendChild(iframe);
      iframeCreated = true;
    }
    overlay.style.display = "block";
    overlay.offsetHeight;
    overlay.classList.add("heyemit-open");
    btn.setAttribute("aria-expanded", "true");
  }

  function closeOverlay() {
    overlay.classList.remove("heyemit-open");
    btn.setAttribute("aria-expanded", "false");
    overlay.addEventListener("transitionend", function handler() {
      overlay.style.display = "none";
      overlay.removeEventListener("transitionend", handler);
    });
  }

  btn.addEventListener("click", function (e) {
    e.stopPropagation();
    overlay.classList.contains("heyemit-open") ? closeOverlay() : openOverlay();
  });

  document.addEventListener("click", function (e) {
    if (overlay.classList.contains("heyemit-open") &&
        !overlay.contains(e.target) && e.target !== btn)
      closeOverlay();
  });

  document.addEventListener("keydown", function (e) {
    if (e.key === "Escape" && overlay.classList.contains("heyemit-open"))
      closeOverlay();
  });
})();