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/*document.addEventListener("DOMContentLoaded", () => {
  const convo = document.querySelector(".convo");
  const input = document.querySelector(".qt input");
  const sendBtn = document.querySelector(".sendingQA");
  const fileBtn = document.querySelector(".fa-file");
  const imageBtn = document.querySelector(".fa-image");

  let selectedFile = null;
  let filePreviewBubble = null;

  // Hidden file input
  const fileInput = document.createElement("input");
  fileInput.type = "file";
  fileInput.accept = ".pdf,.docx,.pptx,.xlsx,image/*";
  fileInput.style.display = "none";
  document.body.appendChild(fileInput);

  fileBtn.addEventListener("click", () => fileInput.click());
  imageBtn.addEventListener("click", () => fileInput.click());

  fileInput.addEventListener("change", () => {
    const file = fileInput.files[0];
    if (file) {
      selectedFile = file;
      if (filePreviewBubble) filePreviewBubble.remove();

      filePreviewBubble = document.createElement("div");
      filePreviewBubble.className = "file-preview-bubble bubble right";
      filePreviewBubble.textContent = `๐Ÿ“Ž Selected: ${file.name}`;
      convo.appendChild(filePreviewBubble);
      convo.scrollTop = convo.scrollHeight;
    }
  });

  function createMessageBubble(text, sender = "You", audioSrc = null, fileName = null) {
    const bubble = document.createElement("div");
    bubble.className = `bubble ${sender === "You" ? "right" : "left"}`;

    const label = document.createElement("div");
    label.className = "label";
    label.innerText = sender;

    const message = document.createElement("div");
    message.className = "text";
    message.style.whiteSpace = "pre-wrap"; // preserve line breaks

    if (sender === "You") {
      let fileLine = fileName ? `๐Ÿ“Ž Selected file: ${fileName}\n` : "";
      message.innerText = `${fileLine}โ“ ${text}`;
    } else {
      message.style.display = "flex";
      message.style.justifyContent = "space-between";
      message.style.alignItems = "center";

      const msgSpan = document.createElement("span");
      msgSpan.innerText = text;
      message.appendChild(msgSpan);

      if (audioSrc) {
        const icon = document.createElement("i");
        icon.className = "fa-solid fa-volume-high audio-toggle";
        icon.title = "Click to mute";
        icon.style.cursor = "pointer";
        icon.style.fontSize = "18px";

        const audio = new Audio(audioSrc);
        audio.play();

       icon.addEventListener("click", () => {
        if (audio.muted) {
        audio.currentTime = 0;     // โฎ๏ธ Rewind to beginning
        audio.muted = false;
        audio.play();              // ๐Ÿ”Š Play from start
        icon.classList.replace("fa-volume-xmark", "fa-volume-high");
        icon.title = "Click to mute";
       } else {
       audio.muted = true;
       icon.classList.replace("fa-volume-high", "fa-volume-xmark");
       icon.title = "Click to unmute";
  }
});

        message.appendChild(icon);
      }
    }

    bubble.appendChild(label);
    bubble.appendChild(message);
    convo.appendChild(bubble);
    convo.scrollTop = convo.scrollHeight;
    return bubble;
  }

  sendBtn.addEventListener("click", async () => {
    const question = input.value.trim();
    if (!question) return;

    if (!selectedFile) {
      alert("Please upload a document or image first.");
      return;
    }

    // Remove file preview bubble
    if (filePreviewBubble) {
      filePreviewBubble.remove();
      filePreviewBubble = null;
    }

    // User message with file info
    createMessageBubble(question, "You", null, selectedFile.name);

    // Chris is thinking...
    const thinkingBubble = createMessageBubble("Wait , Let me think ๐Ÿค”...", "Chris");

    const formData = new FormData();
    formData.append("question", question);
    formData.append("file", selectedFile);

    try {
      const response = await fetch("/predict", {
        method: "POST",
        body: formData
      });

      const result = await response.json();
      const answerText = result.answer || "No response.";
      const audioSrc = result.audio || null;

      // Replace "Let me think..." with actual answer
      const message = thinkingBubble.querySelector(".text");
      message.innerText = answerText;

      if (audioSrc) {
        const icon = document.createElement("i");
        icon.className = "fa-solid fa-volume-high audio-toggle";
        icon.title = "Click to mute";
        icon.style.cursor = "pointer";
        icon.style.fontSize = "18px";
        icon.style.marginLeft = "10px";

        const audio = new Audio(audioSrc);
        audio.play();

        icon.addEventListener("click", () => {
          audio.muted = !audio.muted;
          icon.classList.toggle("fa-volume-high", !audio.muted);
          icon.classList.toggle("fa-volume-xmark", audio.muted);
          icon.title = audio.muted ? "Click to unmute" : "Click to mute";
        });

        message.style.display = "flex";
        message.style.justifyContent = "space-between";
        message.appendChild(icon);
      }
    } catch (err) {
      const message = thinkingBubble.querySelector(".text");
      message.innerText = "โš ๏ธ Chris had trouble responding.";
    }

    input.value = "";
    selectedFile = null;
  });
}); */
document.addEventListener("DOMContentLoaded", () => {
  const convo = document.querySelector(".convo");
  const input = document.querySelector(".qt input");
  const sendBtn = document.querySelector(".sendingQA");
  const fileBtn = document.querySelector(".fa-file");
  const imageBtn = document.querySelector(".fa-image");

  let selectedFile = null;
  let filePreviewBubble = null;

  // Create a hidden input
  const fileInput = document.createElement("input");
  fileInput.type = "file";
  fileInput.style.display = "none";
  document.body.appendChild(fileInput);

  // Choose document
  fileBtn.addEventListener("click", () => {
    fileInput.value = ""; // โœ… allow selecting same file again
    fileInput.accept = ".pdf,.docx,.pptx,.xlsx";
    fileInput.click();
  });

  // Choose image
  imageBtn.addEventListener("click", () => {
    fileInput.value = "";
    fileInput.accept = "image/*";
    fileInput.click();
  });

  // Handle file selection
  fileInput.addEventListener("change", () => {
    const file = fileInput.files[0];
    if (file) {
      selectedFile = file;
      if (filePreviewBubble) filePreviewBubble.remove();

      filePreviewBubble = document.createElement("div");
      filePreviewBubble.className = "file-preview-bubble bubble right";
      filePreviewBubble.textContent = `๐Ÿ“Ž Selected: ${file.name}`;
      convo.appendChild(filePreviewBubble);
      convo.scrollTop = convo.scrollHeight;
    }
  });

  // Drag & drop support
  convo.addEventListener("dragover", (e) => {
    e.preventDefault();
    convo.classList.add("drag-over");
  });

  convo.addEventListener("dragleave", () => {
    convo.classList.remove("drag-over");
  });

  convo.addEventListener("drop", (e) => {
    e.preventDefault();
    convo.classList.remove("drag-over");

    const file = e.dataTransfer.files[0];
    if (file) {
      selectedFile = file;

      if (filePreviewBubble) filePreviewBubble.remove();

      filePreviewBubble = document.createElement("div");
      filePreviewBubble.className = "file-preview-bubble bubble right";
      filePreviewBubble.textContent = `๐Ÿ“Ž Selected: ${file.name}`;
      convo.appendChild(filePreviewBubble);
      convo.scrollTop = convo.scrollHeight;
    }
  });

  function createMessageBubble(text, sender = "You", audioSrc = null, fileName = null) {
    const bubble = document.createElement("div");
    bubble.className = `bubble ${sender === "You" ? "right" : "left"}`;

    const label = document.createElement("div");
    label.className = "label";
    label.innerText = sender;

    const message = document.createElement("div");
    message.className = "text";
    message.style.whiteSpace = "pre-wrap";

    if (sender === "You") {
      const fileLine = fileName ? `๐Ÿ“Ž Selected file: ${fileName}\n` : "";
      message.innerText = `${fileLine}โ“ ${text}`;
    } else {
      message.style.display = "flex";
      message.style.justifyContent = "space-between";
      message.style.alignItems = "center";

      const msgSpan = document.createElement("span");
      msgSpan.innerText = text;
      message.appendChild(msgSpan);

      if (audioSrc) {
        const icon = document.createElement("i");
        icon.className = "fa-solid fa-volume-high audio-toggle";
        icon.title = "Click to mute";
        icon.style.cursor = "pointer";
        icon.style.fontSize = "18px";

        let currentAudio = new Audio(audioSrc);
        currentAudio.play();

        let isMuted = false;
        icon.addEventListener("click", () => {
          if (isMuted) {
            currentAudio = new Audio(audioSrc); // restart
            currentAudio.play();
            isMuted = false;
            icon.classList.replace("fa-volume-xmark", "fa-volume-high");
            icon.title = "Click to mute";
          } else {
            currentAudio.pause();
            isMuted = true;
            icon.classList.replace("fa-volume-high", "fa-volume-xmark");
            icon.title = "Click to unmute";
          }
        });

        message.appendChild(icon);
      }
    }

    bubble.appendChild(label);
    bubble.appendChild(message);
    convo.appendChild(bubble);
    convo.scrollTop = convo.scrollHeight;
    return bubble;
  }

  sendBtn.addEventListener("click", async () => {
    const question = input.value.trim();
    if (!question) return;

    if (!selectedFile) {
      alert("Please upload a document or image first.");
      return;
    }

    if (filePreviewBubble) {
      filePreviewBubble.remove();
      filePreviewBubble = null;
    }

    createMessageBubble(question, "You", null, selectedFile.name);
    const thinkingBubble = createMessageBubble("๐Ÿง  Let me think...", "Chris");

    const wrappedFile = new File([selectedFile], selectedFile.name, {
      type: selectedFile.type,
    });

    const formData = new FormData();
    formData.append("question", question);
    formData.append("file", wrappedFile);

    try {
      const response = await fetch("/predict", {
        method: "POST",
        body: formData
      });

      const result = await response.json();
      const answerText = result.answer || "No response.";
      const audioSrc = result.audio || null;

      const message = thinkingBubble.querySelector(".text");
      message.innerText = answerText;

      if (audioSrc) {
        const icon = document.createElement("i");
        icon.className = "fa-solid fa-volume-high audio-toggle";
        icon.title = "Click to mute";
        icon.style.cursor = "pointer";
        icon.style.fontSize = "18px";
        icon.style.marginLeft = "10px";

        let currentAudio = new Audio(audioSrc);
        currentAudio.play();

        let isMuted = false;
        icon.addEventListener("click", () => {
          if (isMuted) {
            currentAudio = new Audio(audioSrc); // restart
            currentAudio.play();
            isMuted = false;
            icon.classList.replace("fa-volume-xmark", "fa-volume-high");
            icon.title = "Click to mute";
          } else {
            currentAudio.pause();
            isMuted = true;
            icon.classList.replace("fa-volume-high", "fa-volume-xmark");
            icon.title = "Click to unmute";
          }
        });

        message.style.display = "flex";
        message.style.justifyContent = "space-between";
        message.appendChild(icon);
      }

    } catch (err) {
      const message = thinkingBubble.querySelector(".text");
      message.innerText = "โš ๏ธ Chris had trouble responding.";
    }

    input.value = "";
  });
});