class CustomChatInterface extends HTMLElement {
    connectedCallback() {
        this.attachShadow({ mode: 'open' });
        this.shadowRoot.innerHTML = `
            <style>
                :host {
                    display: flex;
                    flex-direction: column;
                    height: 100%;
                    position: relative;
                }
                .chat-history {
                    flex: 1;
                    overflow-y: auto;
                    padding: 1.5rem;
                    display: flex;
                    flex-direction: column;
                    gap: 1.5rem;
                }
                .message {
                    display: flex;
                    gap: 1rem;
                    max-width: 85%;
                    animation: fadeIn 0.3s ease-out;
                }
                .message.user {
                    align-self: flex-end;
                    flex-direction: row-reverse;
                }
                .message.ai {
                    align-self: flex-start;
                }
                .avatar {
                    width: 40px;
                    height: 40px;
                    border-radius: 0.5rem;
                    flex-shrink: 0;
                }
                .msg-bubble {
                    padding: 1rem;
                    border-radius: 1rem;
                    font-size: 0.95rem;
                    line-height: 1.5;
                    position: relative;
                    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
                }
                .user .msg-bubble {
                    background: #6366f1;
                    color: white;
                    border-bottom-right-radius: 0.25rem;
                }
                .ai .msg-bubble {
                    background: #1e293b;
                    color: #e2e8f0;
                    border: 1px solid #334155;
                    border-bottom-left-radius: 0.25rem;
                }
                .input-area {
                    padding: 1.5rem;
                    background: #0f172a;
                    border-top: 1px solid #334155;
                    display: flex;
                    gap: 1rem;
                    align-items: flex-end;
                }
                textarea {
                    flex: 1;
                    background: #1e293b;
                    border: 1px solid #334155;
                    color: white;
                    padding: 0.75rem;
                    border-radius: 0.5rem;
                    resize: none;
                    height: 50px;
                    min-height: 50px;
                    max-height: 150px;
                    font-family: inherit;
                }
                textarea:focus {
                    outline: none;
                    border-color: #6366f1;
                }
                .send-btn {
                    background: #6366f1;
                    color: white;
                    border: none;
                    width: 50px;
                    height: 50px;
                    border-radius: 0.5rem;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                    cursor: pointer;
                    transition: background 0.2s;
                }
                .send-btn:hover {
                    background: #4f46e5;
                }
                .send-btn:disabled {
                    background: #334155;
                    cursor: not-allowed;
                }
                @keyframes fadeIn {
                    from { opacity: 0; transform: translateY(10px); }
                    to { opacity: 1; transform: translateY(0); }
                }
                .typing-indicator span {
                    display: inline-block;
                    width: 6px;
                    height: 6px;
                    background-color: #94a3b8;
                    border-radius: 50%;
                    animation: typing 0.6s infinite;
                    margin: 0 2px;
                }
                @keyframes typing {
                    0%, 100% { transform: translateY(0); }
                    50% { transform: translateY(-3px); }
                }
            </style>

            <div class="chat-history" id="chat-history">
                <!-- Messages will be injected here -->
                <div class="message ai">
                    <img src="http://static.photos/technology/200x200/5" class="avatar" alt="AI">
                    <div class="msg-bubble">
                        Hello! I am Synapse, your AI coding assistant. I can help you search the web, analyze documents, or generate code. What's on your mind today?
                    </div>
                </div>
            </div>
            
            <div class="input-area">
                <textarea id="msg-input" placeholder="Type a message... (Shift+Enter for new line)"></textarea>
                <button id="send-btn" class="send-btn">
                    <i data-feather="send"></i>
                </button>
            </div>
        `;

        const chatHistory = this.shadowRoot.getElementById('chat-history');
        const msgInput = this.shadowRoot.getElementById('msg-input');
        const sendBtn = this.shadowRoot.getElementById('send-btn');
        let isProcessing = false;

        const addMessage = (role, text) => {
            const msgDiv = document.createElement('div');
            msgDiv.className = `message ${role}`;
            
            const avatarUrl = role === 'user' 
                ? 'http://static.photos/people/200x200/12' 
                : 'http://static.photos/technology/200x200/5';

            // Simple markdown-like parsing for bold/newlines
            const formattedText = text
                .replace(/\n/g, '<br>')
                .replace(/\*\*(.*?)\*\*/g, '<strong>$1</strong>')
                .replace(/\*(.*?)\*/g, '<em>$1</em>');

            msgDiv.innerHTML = `
                <img src="${avatarUrl}" class="avatar" alt="${role}">
                <div class="msg-bubble message-content">${formattedText}</div>
            `;
            chatHistory.appendChild(msgDiv);
            chatHistory.scrollTop = chatHistory.scrollHeight;
        };

        const showTyping = () => {
            const typingDiv = document.createElement('div');
            typingDiv.className = 'message ai typing-msg';
            typingDiv.innerHTML = `
                <img src="http://static.photos/technology/200x200/5" class="avatar" alt="AI">
                <div class="msg-bubble typing-indicator">
                    <span></span><span></span><span></span>
                </div>
            `;
            chatHistory.appendChild(typingDiv);
            chatHistory.scrollTop = chatHistory.scrollHeight;
            return typingDiv;
        };

        const handleSend = async () => {
            const text = msgInput.value.trim();
            if (!text || isProcessing) return;

            addMessage('user', text);
            msgInput.value = '';
            msgInput.style.height = '50px'; // Reset height
            isProcessing = true;
            sendBtn.disabled = true;

            // Save to Memory
            if(window.MemoryDB) window.MemoryDB.save('user', text);

            // Show typing indicator
            const typingEl = showTyping();

            // Get Response
            try {
                const response = await window.Agent.respond(text);
                typingEl.remove();
                addMessage('ai', response);
                if(window.MemoryDB) window.MemoryDB.save('assistant', response);
            } catch (error) {
                typingEl.remove();
                addMessage('ai', "Sorry, I encountered an error connecting to the neural net.");
            }

            isProcessing = false;
            sendBtn.disabled = false;
            msgInput.focus();
        };

        sendBtn.addEventListener('click', handleSend);
        msgInput.addEventListener('keypress', (e) => {
            if (e.key === 'Enter' && !e.shiftKey) {
                e.preventDefault();
                handleSend();
            }
        });

        // Auto-resize textarea
        msgInput.addEventListener('input', function() {
            this.style.height = 'auto';
            this.style.height = (this.scrollHeight) + 'px';
        });
        
        // Listen for clear memory event
        window.appEvents.addEventListener('memory-cleared', () => {
             chatHistory.innerHTML = '';
             addMessage('ai', 'Session memory cleared. Ready for a new topic.');
        });

        feather.replace();
    }
}
customElements.define('custom-chat-interface', CustomChatInterface);