class ChatComponent extends HTMLElement {
  constructor() {
    super();
    this.client = null;
    this.messages = [
      {
        role: "assistant",
        content: "Hello! I'm your AI assistant. How can I help you today?"
      }
    ];
  }

  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.render();
    this.initializeOpenAI();
    this.setupEventListeners();
  }

  render() {
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
          width: 100%;
          height: 100%;
        }
        .chat-container {
          display: flex;
          flex-direction: column;
          height: 100%;
          background: rgba(31, 41, 55, 0.8);
          backdrop-filter: blur(10px);
          border-radius: 0.75rem;
          border: 1px solid rgba(75, 85, 99, 0.5);
          overflow: hidden;
        }
        .messages-container {
          flex: 1;
          overflow-y: auto;
          padding: 1rem;
          display: flex;
          flex-direction: column;
          gap: 1rem;
        }
        .message {
          max-width: 80%;
          padding: 1rem;
          border-radius: 12px;
          animation: slideIn 0.3s ease-out;
        }
        .message-user {
          align-self: flex-end;
          background: linear-gradient(135deg, #3b82f6, #8b5cf6);
        }
        .message-ai {
          align-self: flex-start;
          background: rgba(55, 65, 81, 0.8);
        }
        .message-header {
          display: flex;
          align-items: center;
          gap: 0.5rem;
          margin-bottom: 0.5rem;
          font-weight: 600;
        }
        .input-container {
          padding: 1rem;
          border-top: 1px solid rgba(75, 85, 99, 0.5);
          background: rgba(31, 41, 55, 0.9);
        }
        .input-form {
          display: flex;
          gap: 0.5rem;
        }
        .message-input {
          flex: 1;
          background: rgba(55, 65, 81, 0.5);
          border: 1px solid #4b5563;
          border-radius: 0.5rem;
          padding: 0.75rem 1rem;
          color: #f3f4f6;
          font-family: inherit;
        }
        .message-input:focus {
          outline: none;
          border-color: #3b82f6;
          box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }
        .send-button {
          background: #3b82f6;
          color: white;
          border: none;
          border-radius: 0.5rem;
          padding: 0 1.5rem;
          cursor: pointer;
          transition: all 0.2s;
        }
        .send-button:hover {
          background: #2563eb;
        }
        .typing-indicator {
          display: flex;
          align-self: flex-start;
          background: rgba(55, 65, 81, 0.8);
          padding: 1rem;
          border-radius: 12px 12px 12px 0;
          gap: 0.25rem;
        }
        .typing-dot {
          width: 0.5rem;
          height: 0.5rem;
          background: #9ca3af;
          border-radius: 50%;
          animation: typing 1.4s infinite ease-in-out;
        }
        .typing-dot:nth-child(1) { animation-delay: 0s; }
        .typing-dot:nth-child(2) { animation-delay: 0.2s; }
        .typing-dot:nth-child(3) { animation-delay: 0.4s; }
        @keyframes slideIn {
          from { opacity: 0; transform: translateY(20px); }
          to { opacity: 1; transform: translateY(0); }
        }
        @keyframes typing {
          0%, 60%, 100% { transform: translateY(0); }
          30% { transform: translateY(-5px); }
        }
      </style>
      <div class="chat-container">
        <div class="messages-container" id="messagesContainer">
          <!-- Messages will be inserted here -->
        </div>
        <div class="input-container">
          <form class="input-form" id="chatForm">
            <input type="text" class="message-input" id="messageInput" placeholder="Type your message..." autocomplete="off">
            <button type="submit" class="send-button" id="sendButton">
              <i data-feather="send"></i>
            </button>
          </form>
        </div>
      </div>
    `;
  }

  initializeOpenAI() {
    // Note: In a real implementation, the API key should be handled securely on the server-side
    // This is just for demonstration purposes
    try {
      // Load Feather icons
      const script = document.createElement('script');
      script.src = "https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js";
      script.onload = () => {
        if (this.shadowRoot) {
          window.feather.replace();
        }
      };
      this.shadowRoot.appendChild(script);
    } catch (error) {
      console.error('Error initializing OpenAI:', error);
    }
  }

  setupEventListeners() {
    const form = this.shadowRoot.getElementById('chatForm');
    const input = this.shadowRoot.getElementById('messageInput');

    form.addEventListener('submit', async (e) => {
      e.preventDefault();
      const message = input.value.trim();
      if (message) {
        this.sendMessage(message);
        input.value = '';
      }
    });

    // Load initial messages
    this.loadMessages();
  }

  loadMessages() {
    const container = this.shadowRoot.getElementById('messagesContainer');
    container.innerHTML = '';
    
    this.messages.forEach(msg => {
      this.displayMessage(msg);
    });
    
    container.scrollTop = container.scrollHeight;
  }

  displayMessage(message) {
    const container = this.shadowRoot.getElementById('messagesContainer');
    const messageDiv = document.createElement('div');
    messageDiv.className = `message message-${message.role}`;
    
    let icon = 'user';
    let name = 'You';
    if (message.role === 'assistant') {
      icon = 'cpu';
      name = 'AI Assistant';
    }
    
    messageDiv.innerHTML = `
      <div class="message-header">
        <i data-feather="${icon}" style="width: 16px; height: 16px;"></i>
        <span>${name}</span>
      </div>
      <div>${message.content}</div>
    `;
    
    container.appendChild(messageDiv);
    window.feather.replace();
    container.scrollTop = container.scrollHeight;
  }

  showTypingIndicator() {
    const container = this.shadowRoot.getElementById('messagesContainer');
    const typingDiv = document.createElement('div');
    typingDiv.className = 'typing-indicator';
    typingDiv.id = 'typingIndicator';
    typingDiv.innerHTML = `
      <div class="typing-dot"></div>
      <div class="typing-dot"></div>
      <div class="typing-dot"></div>
    `;
    container.appendChild(typingDiv);
    container.scrollTop = container.scrollHeight;
  }

  hideTypingIndicator() {
    const indicator = this.shadowRoot.getElementById('typingIndicator');
    if (indicator) {
      indicator.remove();
    }
  }

  async sendMessage(content) {
    // Add user message to UI
    const userMessage = { role: 'user', content };
    this.messages.push(userMessage);
    this.displayMessage(userMessage);
    
    // Show typing indicator
    this.showTypingIndicator();
    
    try {
      // In a real implementation, this would call the actual API
      // For now, we'll simulate a response
      const response = await this.getAIResponse(content);
      
      // Add AI response to UI
      const aiMessage = { role: 'assistant', content: response };
      this.messages.push(aiMessage);
      this.hideTypingIndicator();
      this.displayMessage(aiMessage);
    } catch (error) {
      console.error('Error getting AI response:', error);
      this.hideTypingIndicator();
      const errorMessage = { 
        role: 'assistant', 
        content: 'Sorry, I encountered an error. Please try again.' 
      };
      this.messages.push(errorMessage);
      this.displayMessage(errorMessage);
    }
  }

  async getAIResponse(prompt) {
    // Simulate API delay
    await new Promise(resolve => setTimeout(resolve, 1000 + Math.random() * 2000));
    
    // Simple response logic for demonstration
    const responses = [
      "I understand your question about \"" + prompt + "\". Based on my analysis, this is an important topic that requires careful consideration.",
      "Thanks for asking about \"" + prompt + "\". I've processed your request and here's what I found...",
      "Regarding \"" + prompt + "\", I can provide some insights. This is a complex matter with several factors to consider.",
      "I've analyzed your query about \"" + prompt + "\". Here's what I recommend based on current best practices.",
      "That's an interesting question about \"" + prompt + "\". Let me break this down for you..."
    ];
    
    return responses[Math.floor(Math.random() * responses.length)] + 
           " This is a simulated response. In a real implementation, this would connect to the Llama API.";
  }
}

customElements.define('chat-component', ChatComponent);