(function () {
  const whatsappLinkRegex = /https:\/\/chat\.whatsapp\.com\/[a-zA-Z0-9]+/g;
  const foundLinks = new Set();

  // Create download button
  const button = document.createElement("button");
  button.textContent = "📥 Download WhatsApp Links (0)";
  button.style.position = "fixed";
  button.style.top = "20px";
  button.style.right = "20px";
  button.style.zIndex = "9999";
  button.style.padding = "10px 15px";
  button.style.backgroundColor = "#25D366";
  button.style.color = "#fff";
  button.style.border = "none";
  button.style.borderRadius = "5px";
  button.style.cursor = "pointer";
  button.style.fontSize = "14px";
  document.body.appendChild(button);

  // Function to update button text with count
  const updateButtonText = () => {
    button.textContent = `📥 Download WhatsApp Links (${foundLinks.size})`;
  };

  // Check and collect new links every 2 seconds
  const checkForLinks = () => {
    const html = document.documentElement.innerHTML;
    const matches = html.match(whatsappLinkRegex) || [];

    matches.forEach(link => {
      if (!foundLinks.has(link)) {
        foundLinks.add(link);
        console.log("🟢 New WhatsApp Link:", link);
        updateButtonText();
      }
    });
  };

  setInterval(checkForLinks, 2000);

  console.log("🔍 Watching for new WhatsApp links as you scroll...");

  // Download links on button click
  button.addEventListener("click", () => {
    const blob = new Blob([Array.from(foundLinks).join("\n")], { type: "text/plain" });
    const url = URL.createObjectURL(blob);
    const a = document.createElement("a");
    a.href = url;
    a.download = "whatsapp_links.txt";
    a.click();
    URL.revokeObjectURL(url);
  });
})();