class EveAIChatWidget extends HTMLElement {
  static get observedAttributes() {
    return ['tenant-id', 'api-key', 'domain', 'language'];
  }

  constructor() {
    super();
    this.socket = null; // Initialize socket to null
    this.attributesSet = false; // Flag to check if all attributes are set
    this.jwtToken = null; // Initialize jwtToken to null
    console.log('EveAIChatWidget constructor called');
  }

  connectedCallback() {
    console.log('connectedCallback called');
    this.innerHTML = this.getTemplate();
    this.messagesArea = this.querySelector('.messages-area');
    this.questionInput = this.querySelector('.question-area input');
    this.statusLine = this.querySelector('.status-line');

    this.querySelector('.question-area button').addEventListener('click', () => this.handleSendMessage());
    this.questionInput.addEventListener('keydown', (event) => {
      if (event.key === 'Enter') {
        this.handleSendMessage();
      }
    });

    if (this.areAllAttributesSet() && !this.socket) {
      console.log('Attributes already set in connectedCallback, initializing socket');
      this.initializeSocket();
    }
  }

  attributeChangedCallback(name, oldValue, newValue) {
    console.log(`attributeChangedCallback called: ${name} changed from ${oldValue} to ${newValue}`);
    this.updateAttributes();
    console.log('Current attributes:', {
      tenantId: this.getAttribute('tenant-id'),
      apiKey: this.getAttribute('api-key'),
      domain: this.getAttribute('domain'),
      language: this.getAttribute('language')
    });

    if (this.areAllAttributesSet() && !this.socket) {
      console.log('All attributes set in attributeChangedCallback, initializing socket');
      this.attributesSet = true;
      this.initializeSocket();
    }
  }

  updateAttributes() {
    console.log('Updating attributes:');
    this.tenantId = this.getAttribute('tenant-id');
    this.apiKey = this.getAttribute('api-key');
    this.domain = this.getAttribute('domain');
    this.language = this.getAttribute('language');
    console.log('Updated attributes:', {
      tenantId: this.tenantId,
      apiKey: this.apiKey,
      domain: this.domain,
      language: this.language
    });
  }

  areAllAttributesSet() {
    const tenantId = this.getAttribute('tenant-id');
    const apiKey = this.getAttribute('api-key');
    const domain = this.getAttribute('domain');
    const language = this.getAttribute('language');
    console.log('Checking if all attributes are set:', {
      tenantId,
      apiKey,
      domain,
      language
    });
    return tenantId && apiKey && domain;
  }

  initializeSocket() {
    if (this.socket) {
      console.log('Socket already initialized');
      return;
    }
    if (!this.domain || this.domain === 'null') {
      console.error('Domain attribute is missing or invalid');
      this.setStatusMessage('EveAI Chat Widget needs further configuration by site administrator.')
      return;
    }
    console.log(`Initializing socket connection to ${this.domain}`);

    // Ensure apiKey is passed in the query parameters
    this.socket = io(this.domain, {
      path: '/chat/socket.io/',
      transports: ['websocket', 'polling'],
      query: {
        tenantId: this.tenantId,
        apiKey: this.apiKey // Ensure apiKey is included here
      },
      auth: {
        token: 'Bearer ' + this.apiKey // Ensure token is included here
      }
    });

    this.socket.on('connect', (data) => {
      console.log('Socket connected');
      this.setStatusMessage('Connected to EveAI.')
    });

    this.socket.on('authenticated', (data) => {
      console.log('Authenticated event received: ', data);
      this.setStatusMessage('Authenticated.')
      if (data.token) {
        this.jwtToken = data.token; // Store the JWT token received from the server
      }
    });

    this.socket.on('connect_error', (err) => {
      console.error('Socket connection error:', err);
      this.setStatusMessage('EveAI Chat Widget needs further configuration by site administrator.')
    });

    this.socket.on('connect_timeout', () => {
      console.error('Socket connection timeout');
      this.setStatusMessage('EveAI Chat Widget needs further configuration by site administrator.')
    });

    this.socket.on('disconnect', () => {
      console.log('Socket disconnected');
      this.setStatusMessage('Disconnected from EveAI. Please refresh the page for further interaction.')
    });

    this.socket.on('bot_response', (data) => {
      if (data.tenantId === this.tenantId) {
        console.log('Initial response received:', data)
        console.log('Task ID received:', data.taskId)
        this.checkTaskStatus(data.taskId)
        this.setStatusMessage('Processing...')
      }
    });

    this.socket.on('task_status', (data) => {
      console.log('Task status received:', data.status)
      console.log('Task ID received:', data.taskId)
      console.log('Citations type:', typeof data.citations, 'Citations:', data.citations);

      if (data.status === 'pending') {
          this.updateProgress();
          setTimeout(() => this.checkTaskStatus(data.taskId), 1000); // Poll every second
      } else if (data.status === 'success') {
          this.addBotMessage(data.answer, data.interaction_id, data.algorithm, data.citations);
          this.clearProgress(); // Clear progress indicator when done
      } else {
          this.setStatusMessage('Failed to process message.');
      }
    });
  }

  setStatusMessage(message) {
    this.statusLine.textContent = message;
  }

  updateProgress() {
    if (!this.statusLine.textContent) {
        this.statusLine.textContent = 'Processing...';
    } else {
        this.statusLine.textContent += '.'; // Append a dot
    }
  }

  clearProgress() {
    this.statusLine.textContent = '';
  }

  checkTaskStatus(taskId) {
    this.updateProgress();
    this.socket.emit('check_task_status', { task_id: taskId });
  }

  getTemplate() {
    return `
      <div class="chat-container">
        <div class="messages-area"></div>
        <div class="question-area">
          <input type="text" placeholder="Type your message here..." />
          <button>Send</button>
        </div>
        <div class="status-line"></div>
      </div>
    `;
  }

  addUserMessage(text) {
    const message = document.createElement('div');
    message.classList.add('message', 'user');
    message.innerHTML = `<p>${text}</p>`;
    this.messagesArea.appendChild(message);
    this.messagesArea.scrollTop = this.messagesArea.scrollHeight;
  }

  addBotMessage(text, interactionId, algorithm = 'default', citations = []) {
    const message = document.createElement('div');
    message.classList.add('message', 'bot');

    let content = marked.parse(text); // Use marked to convert markdown to HTML
    // Ensure citations is an array
    if (!Array.isArray(citations)) {
      console.error('Expected citations to be an array, but got:', citations);
      citations = []; // Default to an empty array
    }
    let citationsHtml = citations.map(url => `<a href="${url}" target="_blank">${url}</a>`).join('<br>');

    message.innerHTML = `
        <p>${content}</p>
        ${citationsHtml ? `<p>${citationsHtml}</p>` : ''}
        <div class="message-icons">
            <span class="algorithm-indicator" style="background-color: var(--algorithm-color-${algorithm});">${algorithm}</span>
            <i class="material-icons" onclick="handleFeedback('up', '${interactionId}')">thumb_up</i>
            <i class="material-icons" onclick="handleFeedback('down', '${interactionId}')">thumb_down</i>
        </div>
    `;
    this.messagesArea.appendChild(message);
    this.messagesArea.scrollTop = this.messagesArea.scrollHeight;
  }

  handleSendMessage() {
    console.log('handleSendMessage called');
    const message = this.questionInput.value.trim();
    if (message) {
      this.addUserMessage(message);
      this.questionInput.value = '';
      this.sendMessageToBackend(message);
    }
  }

  sendMessageToBackend(message) {
    console.log('sendMessageToBackend called');
    if (!this.socket) {
      console.error('Socket is not initialized');
      return;
    }
    if (!this.jwtToken) {
      console.error('JWT token is not available');
      return;
    }
    console.log('Sending message to backend');
    this.socket.emit('user_message', { tenantId: this.tenantId, token: this.jwtToken, message, language: this.language });
    this.setStatusMessage('Processing started ...')
  }
}

customElements.define('eveai-chat-widget', EveAIChatWidget);

function handleFeedback(feedback, interactionId) {
  // Send feedback to the backend
  console.log(`Feedback for ${interactionId}: ${feedback}`);
  this.socket.emit('feedback', { feedback, interaction_id: interactionId });
}