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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>i3 Model Series</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap" rel="stylesheet">
    <style>
        /* Global Styles */
        body { margin: 0; font-family: 'Inter', sans-serif; background: #fff; color: #333; }
        
        /* Navigation Bar */
        nav {
            background: #ffffff;
            border-bottom: 1px solid #eee;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .nav-logo { font-weight: 700; font-size: 1.2rem; color: #111; text-decoration: none; cursor: pointer;}
        .nav-links a {
            margin-left: 20px;
            text-decoration: none;
            color: #666;
            font-size: 0.9rem;
            transition: color 0.2s;
            cursor: pointer;
        }
        .nav-links a:hover, .nav-links a.active { color: #007bff; }

        /* Content Container */
        #app-content {
            padding: 40px 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            min-height: 80vh;
        }
    </style>
</head>
<body>

    <nav>
        <a class="nav-logo" onclick="route('home')">i3 Series</a>
        <div class="nav-links">
            <a onclick="route('home')" id="nav-home">Home</a>
            <a onclick="route('timeline')" id="nav-timeline">Timeline</a>
            <a onclick="route('chat')" id="nav-chat">Chat <i class="fas fa-sparkles" style="font-size: 0.7em; color: #007bff;"></i></a>
            <a onclick="route('about')" id="nav-about">About</a>
        </div>
    </nav>

    <div id="app-content"></div>

    <footer style="text-align: center; padding: 20px; color: #999; font-size: 0.9rem; border-top: 1px solid #eee;">
        <p>i3 Model Series &copy; 2025</p>
    </footer>

    <script type="module">
        // 1. UPDATE: Import the 'Client' class from the latest version
        import { Client } from "https://cdn.jsdelivr.net/npm/@gradio/client@latest/dist/index.min.js";

        // --- MODEL CONFIGURATION ---
        const MODEL_CONFIG = {
            '200m': {
                // 2. UPDATE: Use the simple Space ID with the new client
                spaceId: "FlameF0X/i3-200m", 
                endpoint: "/predict", 
                name: "i3-200m"
            },
            '80m': {
                spaceId: "FlameF0X/i3-80m-with-streaming",
                endpoint: "/generate_text", 
                name: "i3-80m"
            }
        };

        const routes = {
            'home': 'pages/home.html',
            'timeline': 'pages/timeline.html',
            'chat': 'pages/chat.html',
            'about': 'pages/about.html'
        };

        // Make route global
        window.route = async function(pageName) {
            document.querySelectorAll('.nav-links a').forEach(el => el.classList.remove('active'));
            const activeLink = document.getElementById(`nav-${pageName}`);
            if(activeLink) activeLink.classList.add('active');

            const contentDiv = document.getElementById('app-content');
            
            try {
                const response = await fetch(routes[pageName]);
                if (!response.ok) throw new Error('Page not found');
                const html = await response.text();
                contentDiv.innerHTML = html;

                if(pageName === 'timeline') initTimelineAnimations(); 
                if(pageName === 'chat') initChatInterface();

                const newUrl = window.location.protocol + "//" + window.location.host + window.location.pathname + '?page=' + pageName;
                window.history.pushState({ path: newUrl }, '', newUrl);

            } catch (error) {
                console.error(error);
                contentDiv.innerHTML = "<h2 style='text-align:center; color:#999;'>404 - Page not found</h2>";
            }
        }

        // --- TIMELINE LOGIC ---
        function initTimelineAnimations() {
            const spaceBtn = document.getElementById('i3SpaceBtn');
            if(spaceBtn) {
                spaceBtn.addEventListener('click', () => window.open('https://huggingface.co/spaces/FlameF0X/i3-200m', '_blank'));
            }

            const observer = new IntersectionObserver((entries) => {
                entries.forEach(entry => {
                    if (entry.isIntersecting) {
                        entry.target.style.opacity = 1;
                        entry.target.style.transform = 'translateY(0)';
                        observer.unobserve(entry.target);
                    }
                });
            }, { threshold: 0.1 });

            document.querySelectorAll('.timeline-item').forEach(item => {
                item.style.opacity = 0;
                item.style.transform = 'translateY(20px)';
                item.style.transition = 'opacity 0.5s ease, transform 0.5s ease';
                observer.observe(item);
            });
        }

        // --- CHAT LOGIC ---
        function initChatInterface() {
            const input = document.getElementById('user-input');
            const btn = document.getElementById('send-btn');
            const container = document.getElementById('messages-container');
            const modelSelector = document.getElementById('model-selector');

            function addMessage(text, sender, modelName = 'i3') {
                const div = document.createElement('div');
                div.className = `message ${sender}`;
                div.innerHTML = sender === 'bot' ? `<strong>${modelName}:</strong> ${text}` : text;
                container.appendChild(div);
                container.scrollTop = container.scrollHeight;
                return div;
            }

            async function handleSend() {
                const prompt = input.value.trim();
                if(!prompt) return;

                const selectedKey = modelSelector.value; 
                const modelConfig = MODEL_CONFIG[selectedKey];

                addMessage(prompt, 'user');
                input.value = '';
                input.disabled = true;
                btn.disabled = true;

                const loadingBubble = addMessage('<i class="fas fa-circle-notch fa-spin"></i> Thinking...', 'bot', modelConfig.name);

                try {
                    const maxTokens = parseInt(document.getElementById('param-tokens').value);
                    const temp = parseFloat(document.getElementById('param-temp').value);
                    const topK = parseInt(document.getElementById('param-topk').value);

                    console.log(`Connecting to ${modelConfig.spaceId}...`);
                    
                    // 3. UPDATE: Use Client.connect() syntax
                    const app = await Client.connect(modelConfig.spaceId);
                    
                    const result = await app.predict(modelConfig.endpoint, { 
                        param_0: prompt,     
                        param_1: maxTokens,  
                        param_2: temp,       
                        param_3: topK        
                    });

                    loadingBubble.innerHTML = `<strong>${modelConfig.name}:</strong> ${result.data[0]}`;

                } catch (error) {
                    console.error("API Error:", error);
                    loadingBubble.innerHTML = `<strong>Error:</strong> Failed to connect.<br><small>${error.message}</small>`;
                    loadingBubble.style.background = "#fff0f0";
                    loadingBubble.style.color = "#d00";
                } finally {
                    input.disabled = false;
                    btn.disabled = false;
                    input.focus();
                    container.scrollTop = container.scrollHeight;
                }
            }

            btn.onclick = handleSend;
            input.onkeypress = (e) => {
                if(e.key === 'Enter') handleSend();
            };
        }

        const urlParams = new URLSearchParams(window.location.search);
        const currentPage = urlParams.get('page') || 'home'; 
        window.route(currentPage);
    </script>
</body>
</html>