"use strict";

// First, let's add the Marked library for markdown parsing
const markedScript = document.createElement("script");
markedScript.src =
  "https://cdnjs.cloudflare.com/ajax/libs/marked/4.2.12/marked.min.js";
document.head.appendChild(markedScript);

// Initialize toggle button functionality immediately
const chatToggleBtn = document.getElementById("chatToggleBtn");
const chatBox = document.querySelector(".chat-box");
const notificationBadge = document.querySelector(".notification-badge");

chatToggleBtn.addEventListener("click", function () {
  chatBox.classList.toggle("active");
  if (notificationBadge) {
    notificationBadge.remove();
  }
});

// Wait for marked to load before initializing chat
markedScript.onload = function () {
  initializeChat();
};

function initializeChat() {
  var chatInput = document.querySelector("#chat_input");
  var typing = document.querySelector("#typing");
  var send = document.querySelector("#send");
  var chatMessages = document.querySelector("#chat_messages");
  var chatBoxBody = document.querySelector("#chat_box_body");
  var chatForm = document.querySelector("#chat-form");

  // Profile configuration
  const profile = {
    my: {
      name: "You",
      pic: "https://imgproxy.attic.sh/unsafe/rs:fit:540:540:1:1/t:1:FF00FF:false:false/aHR0cHM6Ly9hdHRp/Yy5zaC9sYmxjODRn/OTcxeXV5bnQwcXMz/NjNmbGNrZTQ5.webp",
    },
    other: {
      name: "Assistant",
      pic: "/static/favicon.PNG",
    },
  };

  // Configure marked options
  marked.setOptions({
    breaks: true,
    gfm: true,
    smartLists: true,
    smartypants: true,
    xhtml: true,
  });

  function sanitizeHTML(str) {
    const div = document.createElement("div");
    div.textContent = str;
    return div.innerHTML;
  }

  function renderMarkdown(text) {
    try {
      const rawHtml = marked.parse(text);
      const tempDiv = document.createElement("div");
      tempDiv.innerHTML = rawHtml;

      tempDiv.querySelectorAll("pre code").forEach((block) => {
        block.textContent = block.innerHTML;
      });

      return tempDiv.innerHTML;
    } catch (e) {
      console.error("Markdown parsing error:", e);
      return sanitizeHTML(text);
    }
  }

  function renderProfile(p) {
    return `
                    <div class="profile ${p}-profile hide">
                        <img src="${profile[p].pic}" alt="${profile[p].name}" width="30" height="30" />
                        &nbsp;<span>${profile[p].name}</span>
                    </div>
                `;
  }

  function renderMessage(p, m) {
    const messageContent = p === "other" ? renderMarkdown(m) : sanitizeHTML(m);
    return `<div class="message ${p}-message hide">${messageContent}</div>`;
  }

  function appendMessage(p, message) {
    const messageHtml = renderProfile(p) + renderMessage(p, message);
    chatMessages.insertAdjacentHTML("beforeend", messageHtml);

    // Reveal new elements with animation
    const newElements = document.querySelectorAll(
      ".profile.hide, .message.hide"
    );
    newElements.forEach((elm) => {
      if (elm.classList.contains("profile")) {
        elm.style.height = "auto";
      }
      elm.classList.remove("hide");
    });

    // Scroll to bottom
    chatBoxBody.scrollTop = chatBoxBody.scrollHeight;

    // Initialize syntax highlighting if available
    if (window.hljs) {
      document.querySelectorAll("pre code").forEach((block) => {
        hljs.highlightBlock(block);
      });
    }
  }

  // Auto-resize textarea
  chatInput.addEventListener("input", function () {
    this.style.height = "0";
    this.style.height = this.scrollHeight + 1 + "px";
  });

  // Handle enter key
  chatInput.addEventListener("keydown", function (evt) {
    if (evt.keyCode == 13 && !evt.shiftKey) {
      handleSubmit();
      evt.preventDefault();
    }
  });

  // Handle form submission
  if (chatForm) {
    chatForm.addEventListener("submit", function (evt) {
      evt.preventDefault();
      handleSubmit();
    });
  }

  async function handleSubmit() {
    const message = chatInput.value.trim();
    if (!message) return;

    // Show user message
    appendMessage("my", message);

    // Clear input
    chatInput.value = "";
    chatInput.style.height = "40px";

    // Show typing indicator
    typing.classList.add("active");

    try {
      // Send message to backend
      const formData = new FormData();
      formData.append("text", message);

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

      const data = await response.text();

      // Hide typing indicator
      typing.classList.remove("active");

      // Show bot response
      appendMessage("other", data);
    } catch (error) {
      console.error("Error:", error);
      typing.classList.remove("active");
      appendMessage(
        "other",
        "Sorry, I encountered an error. Please try again."
      );
    }
  }

  // Initialize scroll position
  chatBoxBody.scrollTop = chatBoxBody.scrollHeight;
}