const chatbotToggler = document.querySelector(".chatbot-toggler");
const closeBtn = document.querySelector(".close-btn");
const chatbox = document.querySelector(".chatbox");
const chatInput = document.querySelector(".chat-input textarea");
const sendChatBtn = document.querySelector(".chat-input span");
// Функция для получения или генерации session_id
//function getSessionId() {
//    let sessionId = localStorage.getItem('session_id');
//    if (!sessionId) {
//        sessionId = crypto.randomUUID();
//        localStorage.setItem('session_id', sessionId);
//    }
//    return sessionId;

let userMessage = null; // Variable to store user's message
//const API_KEY = "PASTE-YOUR-API-KEY"; // Paste your API key here
const inputInitHeight = chatInput.scrollHeight;

const createChatLi = (message, className) => {
    // Create a chat <li> element with passed message and className
    const chatLi = document.createElement("li");
    chatLi.classList.add("chat", `${className}`);
    let chatContent = className === "outgoing" ? `<p></p>` : `<span class="material-symbols-outlined">smart_toy</span><p></p>`;
    chatLi.innerHTML = chatContent;
    chatLi.querySelector("p").textContent = message;
    return chatLi; // return chat <li> element
}

const generateResponse = (chatElement) => {
    const API_URL = "https://hgswdi5icult2y-8002.proxy.runpod.net/query";
    const messageElement = chatElement.querySelector("p");
    const sessionId = getSessionId();
    //const sessionId = getSessionId();
    //const sessionId = "1234567";
    // Define the properties and message for the API request
    const requestOptions = {
        method: "POST",
        headers: {
            'Content-Type': 'application/json',
            'X-Session-ID': sessionId  // Передача session_id через заголовок
        },
        body: JSON.stringify(userMessage)
    }

    // Send POST request to API, get response and set the reponse as paragraph text
    fetch(API_URL, requestOptions).then(res => res.text()).then(data => {
        //messageElement.textContent = data.trim();
       //messageElement.textContent = data.replace(/"/g, '').replace(/\\n/g, '<br>');
       messageElement.textContent = data.replace(/"/g, '').replace(/\\n/g, ' ').trim();
    }).catch(() => {
        messageElement.classList.add("error");
        messageElement.textContent = "Упс! Что-то пошло не так. Пожалуйста, попробуйте еще раз.";
    }).finally(() => chatbox.scrollTo(0, chatbox.scrollHeight));
}

const handleChat = () => {
    userMessage = chatInput.value.trim(); // Get user entered message and remove extra whitespace
    if(!userMessage) return;

    // Clear the input textarea and set its height to default
    chatInput.value = "";
    chatInput.style.height = `${inputInitHeight}px`;

    // Append the user's message to the chatbox
    chatbox.appendChild(createChatLi(userMessage, "outgoing"));
    chatbox.scrollTo(0, chatbox.scrollHeight);
    
    setTimeout(() => {
        // Display "Thinking..." message while waiting for the response
        const incomingChatLi = createChatLi("Думаю...", "incoming");
        chatbox.appendChild(incomingChatLi);
        chatbox.scrollTo(0, chatbox.scrollHeight);
        generateResponse(incomingChatLi);
    }, 600);
}

chatInput.addEventListener("input", () => {
    // Adjust the height of the input textarea based on its content
    chatInput.style.height = `${inputInitHeight}px`;
    chatInput.style.height = `${chatInput.scrollHeight}px`;
});

chatInput.addEventListener("keydown", (e) => {
    // If Enter key is pressed without Shift key and the window 
    // width is greater than 800px, handle the chat
    if(e.key === "Enter" && !e.shiftKey && window.innerWidth > 800) {
        e.preventDefault();
        handleChat();
    }
});

sendChatBtn.addEventListener("click", handleChat);
closeBtn.addEventListener("click", () => document.body.classList.remove("show-chatbot"));
chatbotToggler.addEventListener("click", () => document.body.classList.toggle("show-chatbot"));