File size: 76,215 Bytes
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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>TUM Neural Knowledge Network</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/echarts.min.js"></script>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Inter', sans-serif;
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .gradient-text {
            background: linear-gradient(135deg, #3070b3 0%, #e37222 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Particle background Canvas styles */
        #particle-canvas {
            position: fixed !important;
            top: 0 !important;
            left: 0 !important;
            width: 100% !important;
            height: 100% !important;
            z-index: -10 !important;
            background: #0f172a !important;
            display: block !important;
            pointer-events: none;
        }
    </style>
</head>

<body class="bg-slate-900 text-slate-200 min-h-screen">
    <!-- Particle Background Canvas -->
    <canvas id="particle-canvas"></canvas>

    <!-- Navbar -->
    <nav class="bg-slate-900/60 backdrop-blur-md border-b border-slate-800/50 sticky top-0 z-50">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
            <div class="flex justify-between h-16">
                <div class="flex items-center gap-8">
                    <a href="/" class="flex items-center gap-2 group">
                        <div
                            class="w-8 h-8 bg-gradient-to-br from-blue-600 to-purple-600 rounded-lg flex items-center justify-center text-white font-bold shadow-md group-hover:shadow-lg transition-all">
                            N</div>
                        <span class="text-xl font-bold tracking-tight gradient-text">TUM Neural Net</span>
                    </a>
                    <div class="hidden md:flex items-center space-x-6 text-sm font-medium text-slate-400">
                        <a href="/" class="hover:text-cyan-400 transition-colors">Home</a>
                        <a href="#" class="hover:text-cyan-400 transition-colors">Knowledge Graph</a>
                        <a href="#" class="hover:text-cyan-400 transition-colors">About</a>
                    </div>
                </div>
                <div class="flex items-center space-x-4">
                    <div id="status-indicator"
                        class="flex items-center text-xs font-medium text-emerald-400 bg-emerald-500/20 px-3 py-1.5 rounded-full border border-emerald-500/30">
                        <span class="w-2 h-2 bg-emerald-400 rounded-full mr-2 animate-pulse"></span>
                        System Active
                    </div>
                </div>
            </div>
        </div>
    </nav>

    <!-- Progress Notification (Hidden by default) -->
    <div id="progress-toast"
        class="fixed bottom-6 right-6 z-50 transform transition-all duration-300 translate-y-24 opacity-0">
        <div class="bg-slate-800/90 backdrop-blur-md rounded-xl shadow-xl border border-slate-700/50 p-4 w-80">
            <div class="flex items-center justify-between mb-2">
                <h4 class="text-sm font-bold text-slate-100" id="progress-title">Ingesting Knowledge...</h4>
                <span id="progress-count" class="text-xs font-mono text-cyan-400 bg-cyan-500/20 px-2 py-0.5 rounded-full">0 items</span>
            </div>
            <!-- Determinate Progress Bar (for URL crawling) -->
            <div id="progress-bar-container" class="hidden w-full bg-slate-700/50 rounded-full h-2 mb-2 overflow-hidden">
                <div id="progress-bar" class="bg-gradient-to-r from-cyan-500 to-blue-500 h-2 rounded-full transition-all duration-300" style="width: 0%"></div>
            </div>
            <!-- Indeterminate Progress Bar (for other tasks) -->
            <div id="progress-bar-indeterminate" class="w-full bg-slate-700/50 rounded-full h-1.5 mb-2 overflow-hidden">
                <div class="bg-cyan-500 h-1.5 rounded-full animate-progress-indeterminate"></div>
            </div>
            <p id="progress-detail" class="text-xs text-slate-400 truncate">Initializing...</p>
            <p id="progress-url" class="text-xs text-slate-500 truncate mt-1 hidden"></p>
        </div>
    </div>

    <style>
        @keyframes progress-indeterminate {
            0% {
                width: 0%;
                margin-left: 0%;
            }

            50% {
                width: 70%;
                margin-left: 30%;
            }

            100% {
                width: 0%;
                margin-left: 100%;
            }
        }

        .animate-progress-indeterminate {
            animation: progress-indeterminate 1.5s infinite ease-in-out;
        }
    </style>

    <main class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-12">

        <!-- Hero Section -->
        <div class="text-center mb-16">
            <h1 class="text-4xl sm:text-5xl font-extrabold text-slate-100 mb-4">
                Query the <span class="bg-clip-text text-transparent bg-gradient-to-r from-cyan-400 to-blue-500">Collective Intelligence</span>
            </h1>
            <p class="text-lg text-slate-400 max-w-2xl mx-auto">
                Access the distributed knowledge of the Technical University of Munich.
                Powered by semantic understanding and transitive trust algorithms.
            </p>
        </div>

        <!-- Search Interface -->
        <div class="max-w-3xl mx-auto mb-16">
            <div class="relative group">
                <div
                    class="absolute -inset-1 bg-gradient-to-r from-blue-600 to-orange-600 rounded-lg blur opacity-25 group-hover:opacity-50 transition duration-1000 group-hover:duration-200">
                </div>
                <div class="relative">
                    <input type="text" id="search-input"
                        class="block w-full p-5 pl-6 text-lg text-slate-100 border border-slate-700/50 rounded-lg bg-slate-800/50 backdrop-blur-sm shadow-xl focus:ring-2 focus:ring-cyan-500 focus:border-cyan-500/50 outline-none transition-all placeholder:text-slate-500"
                        placeholder="Ask the network (e.g., 'Engineering Degrees')..." required>
                    <button onclick="performSearch()"
                        class="absolute right-2.5 bottom-2.5 bg-gradient-to-r from-cyan-500 to-blue-600 text-white hover:from-cyan-600 hover:to-blue-700 focus:ring-4 focus:outline-none focus:ring-cyan-300 font-medium rounded-lg text-sm px-6 py-3 transition-all shadow-lg shadow-cyan-500/50">
                        Ignite
                    </button>
                </div>
            </div>
        </div>

        <!-- Educational Cards (How it Works) -->
        <div id="intro-cards" class="grid grid-cols-1 md:grid-cols-3 gap-8 mb-16">
            <!-- Card 1 -->
            <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl shadow-lg border border-slate-700/50 hover:shadow-xl hover:border-cyan-500/50 transition-all">
                <div class="w-10 h-10 bg-blue-100 rounded-lg flex items-center justify-center mb-4 text-blue-600">
                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
                            d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 11V9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10">
                        </path>
                    </svg>
                </div>
                <h3 class="text-lg font-bold text-slate-100 mb-2">Knowledge Commons</h3>
                <p class="text-sm text-slate-400">
                    The raw data layer where all crawled information resides. It serves as the foundation for semantic
                    retrieval.
                </p>
            </div>
            <!-- Card 2 -->
            <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl shadow-lg border border-slate-700/50 hover:shadow-xl hover:border-cyan-500/50 transition-all">
                <div class="w-10 h-10 bg-orange-100 rounded-lg flex items-center justify-center mb-4 text-orange-600">
                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
                            d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"></path>
                    </svg>
                </div>
                <h3 class="text-lg font-bold text-slate-100 mb-2">Curated Core</h3>
                <p class="text-sm text-slate-400">
                    A curated layer of "Novelty Anchors". Only unique, high-entropy knowledge is promoted here to form
                    the network's backbone.
                </p>
            </div>
            <!-- Card 3 -->
            <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl shadow-lg border border-slate-700/50 hover:shadow-xl hover:border-cyan-500/50 transition-all">
                <div class="w-10 h-10 bg-purple-100 rounded-lg flex items-center justify-center mb-4 text-purple-600">
                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
                            d="M13 10V3L4 14h7v7l9-11h-7z"></path>
                    </svg>
                </div>
                <h3 class="text-lg font-bold text-slate-100 mb-2">Transitive Trust</h3>
                <p class="text-sm text-slate-400">
                    Authority flows through user navigation. If you trust A, and A links to B, then B gains trust.
                </p>
            </div>
        </div>

        <!-- Results Section with Tabs -->
        <div id="results-section" class="max-w-7xl mx-auto hidden">
            <!-- Tab Navigation -->
            <div class="flex items-center justify-center mb-6 gap-2">
                <button id="tab-list" onclick="switchTab('list')" 
                    class="px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-cyan-500/20 text-cyan-400 border-2 border-cyan-500/50 hover:bg-cyan-500/30 active-tab">
                    <svg class="w-5 h-5 inline mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 10h16M4 14h16M4 18h16"></path>
                    </svg>
                    List View
                </button>
                <button id="tab-graph" onclick="switchTab('graph')" 
                    class="px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-slate-800/50 text-slate-400 border-2 border-slate-700/50 hover:bg-slate-700/50 hover:text-cyan-400 hover:border-cyan-500/50">
                    <svg class="w-5 h-5 inline mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 20l-5.447-2.724A1 1 0 013 16.382V5.618a1 1 0 011.447-.894L9 7m0 13l6-3m-6 3V7m6 10l4.553 2.276A1 1 0 0021 18.382V7.618a1 1 0 00-.553-.894L15 4m0 13V4m0 0L9 7"></path>
                    </svg>
                    Graph View
                </button>
            </div>

            <!-- List View -->
            <div id="list-view" class="space-y-6">
                <div id="results-area" class="max-w-4xl mx-auto space-y-6">
                    <!-- Results will be injected here -->
                </div>
            </div>

            <!-- Graph View -->
            <div id="graph-view" class="hidden">
                <div id="graph-container" style="width: 100%; height: 700px; background: rgba(15, 23, 42, 0.5); border-radius: 12px; border: 1px solid rgba(148, 163, 184, 0.2);"></div>
            </div>
        </div>

        <!-- Injection Panel (Upload) -->
        <div class="mt-24 border-t border-slate-700/50 pt-12">
            <h2 class="text-2xl font-bold text-slate-100 mb-6 text-center">Inject Knowledge</h2>
            <div class="grid grid-cols-1 md:grid-cols-2 gap-8 max-w-4xl mx-auto">
                <!-- XML Dump Upload -->
                <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl border border-slate-700/50 md:col-span-2">
                    <h3 class="font-semibold mb-4 flex items-center text-slate-100">
                        <span class="bg-purple-100 text-purple-800 text-xs font-medium mr-2 px-2.5 py-0.5 rounded">XML</span>
                        Wiki Dump Import
                    </h3>
                    <div class="space-y-3">
                        <div class="flex gap-2 items-center">
                            <input type="file" id="xml-dump-file-input" accept=".xml,.bz2,.gz"
                                class="hidden">
                            <label for="xml-dump-file-input"
                                class="flex-1 bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 cursor-pointer hover:bg-slate-700/70 transition-colors">
                                <span id="xml-dump-file-name" class="text-slate-400">Select XML Dump file...</span>
                            </label>
                            <button onclick="document.getElementById('xml-dump-file-input').click()"
                                class="text-white bg-purple-600 hover:bg-purple-700 focus:ring-4 focus:ring-purple-300 font-medium rounded-lg text-sm px-4 py-2.5">Select File</button>
                        </div>
                        <div class="flex gap-2">
                            <input type="text" id="xml-dump-base-url"
                                class="flex-1 bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 placeholder:text-slate-500"
                                placeholder="Wiki base URL (optional, e.g.: https://wiki.example.com)">
                            <input type="number" id="xml-dump-max-pages"
                                class="w-32 bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 placeholder:text-slate-500"
                                placeholder="Max pages (optional, for testing)">
                            <button onclick="uploadXMLDump()" id="xml-dump-upload-btn"
                                class="text-white bg-purple-600 hover:bg-purple-700 focus:ring-4 focus:ring-purple-300 font-medium rounded-lg text-sm px-5 py-2.5">Import Dump</button>
                        </div>
                        <!-- Upload Progress Bar (hidden by default) -->
                        <div id="xml-dump-progress-container" class="hidden mt-3">
                            <div class="flex items-center justify-between mb-1">
                                <span class="text-xs font-medium text-purple-400">Uploading...</span>
                                <span id="xml-dump-progress-percent" class="text-xs font-mono text-purple-400">0%</span>
                            </div>
                            <div class="w-full bg-slate-700/50 rounded-full h-2 overflow-hidden">
                                <div id="xml-dump-progress-bar" class="bg-gradient-to-r from-purple-600 to-purple-400 h-2 rounded-full transition-all duration-300" style="width: 0%"></div>
                            </div>
                            <div class="flex items-center justify-between mt-1">
                                <span id="xml-dump-progress-size" class="text-xs text-slate-500">0 KB / 0 KB</span>
                                <span id="xml-dump-progress-speed" class="text-xs text-slate-500">-- KB/s</span>
                            </div>
                        </div>
                        <div class="text-xs text-slate-400">
                            💡 Supports MediaWiki/Wikipedia XML Dump files (.xml, .xml.bz2, .xml.gz). Automatically parses pages and link relationships, no crawler needed.
                        </div>
                    </div>
                </div>
                <!-- URL Injection -->
                <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl border border-slate-700/50">
                    <h3 class="font-semibold mb-4 flex items-center">
                        <span
                            class="bg-blue-100 text-blue-800 text-xs font-medium mr-2 px-2.5 py-0.5 rounded">URL</span>
                        Crawl & Absorb
                    </h3>
                    <div class="space-y-2">
                        <input type="text" id="url-input"
                            class="w-full bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 placeholder:text-slate-500"
                            placeholder="https://tum.de/...">
                        <div class="flex gap-2">
                            <input type="password" id="url-password"
                                class="flex-1 bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 placeholder:text-slate-500"
                                placeholder="Enter password..." 
                                onkeypress="if(event.key === 'Enter') uploadUrl()">
                            <button onclick="uploadUrl()"
                                class="text-white bg-blue-600 hover:bg-blue-700 focus:ring-4 focus:ring-blue-300 font-medium rounded-lg text-sm px-5 py-2.5">Inject</button>
                        </div>
                    </div>
                </div>
                <!-- Text Injection -->
                <div class="bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl border border-slate-700/50">
                    <h3 class="font-semibold mb-4 flex items-center text-slate-100">
                        <span
                            class="bg-slate-700/50 text-slate-300 text-xs font-medium mr-2 px-2.5 py-0.5 rounded">TEXT</span>
                        Direct Input
                    </h3>
                    <div class="flex gap-2">
                        <input type="text" id="text-input"
                            class="flex-1 bg-slate-700/50 border border-slate-600/50 text-slate-100 text-sm rounded-lg focus:ring-cyan-500 focus:border-cyan-500/50 block p-2.5 placeholder:text-slate-500"
                            placeholder="Paste knowledge snippet...">
                        <button onclick="uploadText()"
                            class="text-white bg-gray-700 hover:bg-gray-800 focus:ring-4 focus:ring-gray-300 font-medium rounded-lg text-sm px-5 py-2.5">Inject</button>
                    </div>
                </div>
            </div>
        </div>

        <!-- Trending Section -->
        <div class="max-w-7xl mx-auto mb-16 px-4">
            <h2 class="text-2xl font-bold text-slate-100 mb-6 flex items-center gap-2">
                <span class="w-2 h-8 bg-orange-500 rounded-full"></span>
                🔥 Trending Now
            </h2>
            <div id="trending-area" class="grid grid-cols-1 md:grid-cols-3 gap-6">
                <!-- Trending items will be injected here -->
                <div class="col-span-full text-center py-8 text-slate-400">Loading hot topics...</div>
            </div>
        </div>

        <!-- Knowledge Feed Section -->
        <div class="max-w-7xl mx-auto mb-16 px-4">
            <h2 class="text-2xl font-bold text-slate-100 mb-6 flex items-center gap-2">
                <span class="w-2 h-8 bg-blue-600 rounded-full"></span>
                Recent Knowledge Ingestions
            </h2>
            <div id="feed-area" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
                <!-- Feed items will be injected here -->
                <div class="col-span-full text-center py-8 text-slate-400">Loading feed...</div>
            </div>
        </div>

    </main>

    <!-- Notification Toast -->
    <div id="notification-toast"
        class="fixed bottom-5 right-5 bg-slate-900 text-white px-6 py-4 rounded-lg shadow-2xl transform translate-y-24 transition-transform duration-300 flex items-center gap-4 z-50 max-w-md">
        <div class="flex-1">
            <h4 class="font-bold text-sm text-blue-400 mb-1">System Update</h4>
            <p class="text-xs text-slate-300" id="notification-msg">Network synchronized.</p>
        </div>
        <button onclick="hideNotification()" class="text-slate-500 hover:text-white"></button>
    </div>

    <script>
        // ==========================================
        // 3D PARTICLE NETWORK BACKGROUND
        // ==========================================
        // Ensure DOM is loaded before initializing particle effect
        // Use IIFE, execute immediately if DOM is loaded, otherwise wait for DOMContentLoaded
        (function initParticleNetwork() {
            function startParticleNetwork() {
                const canvas = document.getElementById('particle-canvas');
                if (!canvas) {
                    console.error('Particle canvas not found!');
                    return;
                }
                
                try {
                    const ctx = canvas.getContext('2d');
                    if (!ctx) {
                        console.error('Failed to get 2D context from canvas');
                        return;
                    }
                    
                    let animationFrameId = null;
                    let width = 0;
                    let height = 0;
                    let particles = [];

                    const particleCount = 60;
                    const connectionDistance = 150;
                    const mouseDistance = 200;
                    let mouse = { x: null, y: null };
                    let animationRunning = false;

                    const resize = () => {
                        // Get window dimensions
                        width = window.innerWidth || document.documentElement.clientWidth || 1920;
                        height = window.innerHeight || document.documentElement.clientHeight || 1080;
                        
                        // Ensure dimensions are valid (at least 1)
                        if (width <= 0) width = 1920;
                        if (height <= 0) height = 1080;
                        
                        // Set Canvas dimensions
                        canvas.width = width;
                        canvas.height = height;
                        
                        console.log(`✅ Canvas resized to ${width}x${height}`);
                        
                        // Only initialize if particles are empty
                        if (particles.length === 0) {
                            initParticles();
                        } else {
                            // If particles exist, reposition them to fit new dimensions
                            particles.forEach(p => {
                                p.x = Math.min(p.x, width);
                                p.y = Math.min(p.y, height);
                            });
                        }
                    };

                    class Particle {
                        constructor() {
                            // Use current actual width and height, or default values if not initialized
                            const w = width || window.innerWidth || 1920;
                            const h = height || window.innerHeight || 1080;
                            this.x = Math.random() * w;
                            this.y = Math.random() * h;
                            this.vx = (Math.random() - 0.5) * 0.5;
                            this.vy = (Math.random() - 0.5) * 0.5;
                            this.size = Math.random() * 2 + 1;
                            this.color = `rgba(${Math.random() * 50 + 100}, ${Math.random() * 100 + 155}, 255, ${Math.random() * 0.5 + 0.2})`;
                        }

                        update() {
                            this.x += this.vx;
                            this.y += this.vy;
                            if (this.x < 0 || this.x > width) this.vx *= -1;
                            if (this.y < 0 || this.y > height) this.vy *= -1;

                            if (mouse.x != null) {
                                let dx = mouse.x - this.x;
                                let dy = mouse.y - this.y;
                                let distance = Math.sqrt(dx * dx + dy * dy);
                                if (distance < mouseDistance && distance > 0) {
                                    const forceDirectionX = dx / distance;
                                    const forceDirectionY = dy / distance;
                                    const force = (mouseDistance - distance) / mouseDistance;
                                    this.vx += forceDirectionX * force * 0.6;
                                    this.vy += forceDirectionY * force * 0.6;
                                }
                            }
                            
                            // Limit velocity
                            const maxSpeed = 2.0;
                            const speed = Math.sqrt(this.vx * this.vx + this.vy * this.vy);
                            if (speed > maxSpeed) {
                                this.vx = (this.vx / speed) * maxSpeed;
                                this.vy = (this.vy / speed) * maxSpeed;
                            }
                        }

                        draw() {
                            ctx.beginPath();
                            ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
                            ctx.fillStyle = this.color;
                            ctx.fill();
                        }
                    }

                    const initParticles = () => {
                        particles = [];
                        for (let i = 0; i < particleCount; i++) {
                            particles.push(new Particle());
                        }
                    };

                    const animate = () => {
                        if (!ctx || !animationRunning) return;
                        if (width <= 0 || height <= 0 || particles.length === 0) {
                            console.warn('Animation skipped: invalid dimensions or no particles');
                            animationFrameId = requestAnimationFrame(animate);
                            return;
                        }
                        
                        try {
                            ctx.clearRect(0, 0, width, height);
                            
                            // Draw connection lines
                            for (let i = 0; i < particles.length; i++) {
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                                    let dx = particles[i].x - particles[j].x;
                                    let dy = particles[i].y - particles[j].y;
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                                    if (distance < connectionDistance && distance > 0) {
                                        ctx.beginPath();
                                        ctx.strokeStyle = `rgba(100, 200, 255, ${1 - distance / connectionDistance})`;
                                        ctx.lineWidth = 0.5;
                                        ctx.moveTo(particles[i].x, particles[i].y);
                                        ctx.lineTo(particles[j].x, particles[j].y);
                                        ctx.stroke();
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                                }
                            }

                            // Update and draw particles
                            particles.forEach(particle => {
                                particle.update();
                                particle.draw();
                            });

                            animationFrameId = requestAnimationFrame(animate);
                        } catch (error) {
                            console.error('Error in animation loop:', error);
                            animationRunning = false;
                        }
                    };

                    const handleMouseMove = (e) => {
                        mouse.x = e.clientX || e.x;
                        mouse.y = e.clientY || e.y;
                    };

                    const handleMouseLeave = () => {
                        mouse.x = null;
                        mouse.y = null;
                    };

                    // Cleanup function
                    const cleanup = () => {
                        window.removeEventListener('resize', resize);
                        window.removeEventListener('mousemove', handleMouseMove);
                        window.removeEventListener('mouseleave', handleMouseLeave);
                        if (animationFrameId) {
                            cancelAnimationFrame(animationFrameId);
                        }
                    };

                    // Bind events
                    window.addEventListener('resize', resize);
                    window.addEventListener('mousemove', handleMouseMove);
                    window.addEventListener('mouseleave', handleMouseLeave);

                    // Initialize dimensions and particles
                    resize();
                    
                    // Verify initialization success
                    if (particles.length === 0) {
                        console.error('Failed to initialize particles!');
                        return;
                    }
                    
                    if (width <= 0 || height <= 0) {
                        console.error(`Invalid canvas dimensions: ${width}x${height}`);
                        return;
                    }
                    
                    // Start animation loop
                    animationRunning = true;
                    setTimeout(() => {
                        animate();
                        console.log('✅ Particle network initialized successfully');
                        console.log(`   Canvas: ${canvas.width}x${canvas.height}`);
                        console.log(`   Particles: ${particles.length}`);
                    }, 150);
                } catch (error) {
                    console.error('Error initializing particle network:', error);
                }
            }

            // Prevent duplicate initialization
            let isInitialized = false;
            
            // Multiple checks to ensure Canvas element exists before execution
            function tryInitParticleNetwork() {
                // Prevent duplicate initialization
                if (isInitialized) {
                    console.log('Particle network already initialized, skipping...');
                    return;
                }
                
                const canvas = document.getElementById('particle-canvas');
                if (canvas) {
                    // Mark as initialized to avoid duplicates
                    isInitialized = true;
                    canvas.dataset.initialized = 'true';
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                    // If Canvas is not ready yet, wait and retry (max 10 attempts)
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                    function retry() {
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                        const canvas = document.getElementById('particle-canvas');
                        if (canvas) {
                            isInitialized = true;
                            canvas.dataset.initialized = 'true';
                            startParticleNetwork();
                        } else if (retryCount < maxRetries) {
                            console.warn(`Canvas not found, retrying... (${retryCount}/${maxRetries})`);
                            setTimeout(retry, 200);
                        } else {
                            console.error('Failed to find Canvas element after multiple attempts!');
                        }
                    }
                    
                    setTimeout(retry, 100);
                }
            }
            
            // Choose initialization timing based on DOM state
            if (document.readyState === 'loading') {
                // DOM is still loading, wait for DOMContentLoaded
                document.addEventListener('DOMContentLoaded', function() {
                    console.log('DOMContentLoaded event fired, initializing particle network...');
                    setTimeout(tryInitParticleNetwork, 100);
                });
            } else if (document.readyState === 'interactive' || document.readyState === 'complete') {
                // DOM is loaded or fully loaded
                console.log(`DOM ready state: ${document.readyState}, initializing particle network...`);
                setTimeout(tryInitParticleNetwork, 100);
            }
            
            // As final fallback, listen to window.onload
            window.addEventListener('load', function() {
                if (!isInitialized) {
                    console.log('Window load event fired, attempting particle network initialization...');
                    setTimeout(tryInitParticleNetwork, 200);
                }
            });
        })();

        // ==========================================
        // WebSocket for Real-time Updates
        // ==========================================
        const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
        const ws = new WebSocket(`${protocol}//${window.location.host}/ws`);

        const progressToast = document.getElementById('progress-toast');
        const progressCount = document.getElementById('progress-count');
        const progressDetail = document.getElementById('progress-detail');
        let progressTimer;

        const progressBarContainer = document.getElementById('progress-bar-container');
        const progressBar = document.getElementById('progress-bar');
        const progressBarIndeterminate = document.getElementById('progress-bar-indeterminate');
        const progressTitle = document.getElementById('progress-title');
        const progressUrl = document.getElementById('progress-url');

        // WebSocket connection handlers
        ws.onopen = function() {
            console.log('✅ WebSocket connected successfully');
            // 连接成功后,立即测试连接状态
            fetch('/api/debug/websocket')
                .then(r => r.json())
                .then(data => {
                    console.log('📊 WebSocket debug info:', data);
                    if (data.active_connections === 0) {
                        console.error('⚠️ WARNING: No active connections reported by server!');
                    }
                })
                .catch(e => console.error('Failed to get debug info:', e));
        };

        ws.onerror = function(error) {
            console.error('❌ WebSocket error:', error);
        };

        ws.onclose = function(event) {
            console.log('⚠️ WebSocket closed:', event.code, event.reason);
        };

        ws.onmessage = function (event) {
            try {
                const data = JSON.parse(event.data);
                console.log('WebSocket message received:', data);

            if (data.type === 'progress') {
                // Show toast - check if elements exist
                if (!progressToast) {
                    console.error('Progress toast element not found!');
                    return;
                }
                
                progressToast.classList.remove('translate-y-24', 'opacity-0');
                console.log('Processing progress message:', data);

                // Check if this is URL crawling progress with detailed info
                if (data.task_type === 'url') {
                    console.log('URL crawling progress detected, updating progress bar...');
                    // 即使没有total,也要显示进度条
                    const hasTotal = data.total !== undefined;
                    
                    if (hasTotal) {
                    // Use determinate progress bar for URL crawling
                    if (progressBarContainer) progressBarContainer.classList.remove('hidden');
                    if (progressBarIndeterminate) progressBarIndeterminate.classList.add('hidden');
                    if (progressUrl) progressUrl.classList.remove('hidden');
                    
                    // Update progress bar
                    if (progressBar) {
                        const percent = Math.min(data.percent || 0, 100);
                        progressBar.style.width = percent + '%';
                    }
                    
                    // Update title and count
                    if (progressTitle) progressTitle.textContent = "Crawling URLs...";
                    if (progressCount) {
                        const percent = Math.min(data.percent || 0, 100);
                        progressCount.textContent = `${data.count || 0}/${data.total || 0} (${percent}%)`;
                        progressCount.className = "text-xs font-mono text-cyan-400 bg-cyan-500/20 px-2 py-0.5 rounded-full";
                    }
                    
                    // Update detail and URL
                    if (progressDetail) progressDetail.textContent = data.message || `Processing page ${data.count || 0}`;
                    if (progressUrl && data.current_url) {
                        progressUrl.textContent = data.current_url;
                    }
                    } else {
                        // URL task but no total yet, show indeterminate with message
                        if (progressBarContainer) progressBarContainer.classList.add('hidden');
                        if (progressBarIndeterminate) progressBarIndeterminate.classList.remove('hidden');
                        if (progressUrl && data.current_url) {
                            progressUrl.textContent = data.current_url;
                            progressUrl.classList.remove('hidden');
                        }
                        
                        if (progressTitle) progressTitle.textContent = "Starting Crawl...";
                        if (progressCount) progressCount.textContent = "Initializing...";
                        if (progressDetail) progressDetail.textContent = data.message || "Initializing crawler...";
                    }
                } else {
                    // Use indeterminate progress bar for other tasks
                    if (progressBarContainer) progressBarContainer.classList.add('hidden');
                    if (progressBarIndeterminate) progressBarIndeterminate.classList.remove('hidden');
                    if (progressUrl) progressUrl.classList.add('hidden');
                    
                    if (progressTitle) progressTitle.textContent = "Ingesting Knowledge...";
                    if (progressCount) progressCount.textContent = `${data.count || 0} items`;
                    if (progressDetail) progressDetail.textContent = data.details || data.message || "Processing...";
                }

                // Auto hide after inactivity
                clearTimeout(progressTimer);
                progressTimer = setTimeout(() => {
                    progressToast.classList.add('translate-y-24', 'opacity-0');
                }, 5000); // Keep visible for 5s after last update
            }
            else if (data.type === 'system_update') {
                // Show completion message
                if (!progressToast) return;
                progressToast.classList.remove('translate-y-24', 'opacity-0');
                
                if (data.task_type === 'url') {
                    // For URL tasks, show final count
                    if (progressBarContainer) progressBarContainer.classList.remove('hidden');
                    if (progressBarIndeterminate) progressBarIndeterminate.classList.add('hidden');
                    if (progressBar) progressBar.style.width = '100%';
                    if (progressTitle) progressTitle.textContent = "Crawl Complete!";
                    if (progressCount) {
                        progressCount.textContent = "Done";
                        progressCount.className = "text-xs font-mono text-emerald-400 bg-emerald-500/20 px-2 py-0.5 rounded-full";
                    }
                    if (progressDetail) progressDetail.textContent = data.message || `Processed ${data.count || 0} pages`;
                    if (progressUrl) progressUrl.classList.add('hidden');
                } else {
                    // For other tasks
                    if (progressBarContainer) progressBarContainer.classList.add('hidden');
                    if (progressBarIndeterminate) progressBarIndeterminate.classList.remove('hidden');
                    if (progressTitle) progressTitle.textContent = "Complete!";
                    if (progressCount) {
                        progressCount.textContent = "Done";
                        progressCount.className = "text-xs font-mono text-emerald-400 bg-emerald-500/20 px-2 py-0.5 rounded-full";
                    }
                    if (progressDetail) progressDetail.textContent = data.message || "Synchronization Complete.";
                    if (progressUrl) progressUrl.classList.add('hidden');
                }

                // Refresh feeds
                loadFeed();
                loadTrending();

                // Hide after 5s
                setTimeout(() => {
                    progressToast.classList.add('translate-y-24', 'opacity-0');
                }, 5000);
            }
            else if (data.type === 'error') {
                alert("System Error: " + data.message);
            }
            } catch (error) {
                console.error('Error parsing WebSocket message:', error, event.data);
            }
        };

        function showNotification(msg, type = "success") {
            const toast = document.getElementById('notification-toast');
            const msgElement = document.getElementById('notification-msg');
            msgElement.textContent = msg;
            
            // Set different styles based on type
            if (type === "error") {
                toast.classList.remove('bg-green-500', 'bg-blue-500');
                toast.classList.add('bg-red-500');
            } else {
                toast.classList.remove('bg-red-500');
                toast.classList.add('bg-green-500');
            }
            
            toast.classList.remove('translate-y-24');
            setTimeout(hideNotification, 5000);
        }

        function hideNotification() {
            document.getElementById('notification-toast').classList.add('translate-y-24');
        }

        async function recordInteraction(itemId, url) {
            const formData = new FormData();
            formData.append('item_id', itemId); // Use UUID for tracking
            formData.append('action', 'click');

            try {
                await fetch('/api/feedback', {
                    method: 'POST',
                    body: formData,
                    keepalive: true
                });
                console.log("Interaction recorded for", itemId);
            } catch (e) {
                console.error("Failed to record interaction", e);
            }
        }

        async function loadFeed() {
            const feedDiv = document.getElementById('feed-area');
            try {
                const response = await fetch('/api/feed?limit=6');
                const data = await response.json();

                if (!data.points || data.points.length === 0) {
                    feedDiv.innerHTML = '<div class="col-span-full text-center py-8 text-slate-400">No knowledge found in the Commons.</div>';
                    return;
                }

                feedDiv.innerHTML = '';
                data.points.forEach(pt => {
                    const p = pt.payload;
                    const card = document.createElement('div');
                    card.className = 'bg-slate-800/50 backdrop-blur-sm p-5 rounded-lg border border-slate-700/50 shadow-lg hover:shadow-xl hover:border-cyan-500/50 transition-all';
                    card.innerHTML = `
                        <div class="text-xs font-bold text-slate-400 mb-2 uppercase tracking-wider">${p.type || 'Unknown'}</div>
                        <a href="/view/${pt.id}" class="block text-base font-bold text-slate-100 hover:text-cyan-400 mb-2 line-clamp-1">${p.url || 'Untitled'}</a>
                        <div class="text-sm text-slate-400 line-clamp-3 mb-3">${p.content_preview || ''}</div>
                        <div class="text-xs text-slate-400 font-mono">ID: ${pt.id.substring(0, 6)}...</div>
                    `;
                    feedDiv.appendChild(card);
                });
            } catch (e) {
                feedDiv.innerHTML = `<div class="col-span-full text-center text-red-400">Failed to load feed: ${e.message}</div>`;
            }
        }

        let currentView = 'list';
        let currentSearchResults = null;
        let graphChart = null;

        function switchTab(view) {
            currentView = view;
            const listTab = document.getElementById('tab-list');
            const graphTab = document.getElementById('tab-graph');
            const listView = document.getElementById('list-view');
            const graphView = document.getElementById('graph-view');

            if (view === 'list') {
                listTab.className = 'px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-cyan-500/20 text-cyan-400 border-2 border-cyan-500/50 hover:bg-cyan-500/30 active-tab';
                graphTab.className = 'px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-slate-800/50 text-slate-400 border-2 border-slate-700/50 hover:bg-slate-700/50 hover:text-cyan-400 hover:border-cyan-500/50';
                listView.classList.remove('hidden');
                graphView.classList.add('hidden');
            } else {
                listTab.className = 'px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-slate-800/50 text-slate-400 border-2 border-slate-700/50 hover:bg-slate-700/50 hover:text-cyan-400 hover:border-cyan-500/50';
                graphTab.className = 'px-6 py-3 text-sm font-semibold rounded-lg transition-all duration-200 bg-cyan-500/20 text-cyan-400 border-2 border-cyan-500/50 hover:bg-cyan-500/30 active-tab';
                listView.classList.add('hidden');
                graphView.classList.remove('hidden');
                
                // Render graph if we have search results
                if (currentSearchResults) {
                    renderGraphView(currentSearchResults);
                }
            }
        }

        async function renderGraphView(query) {
            const graphContainer = document.getElementById('graph-container');
            
            // Show loading
            graphContainer.innerHTML = '<div class="flex items-center justify-center h-full"><div class="text-center"><div class="animate-spin rounded-full h-12 w-12 border-b-2 border-cyan-600 mx-auto"></div><p class="mt-4 text-slate-400">Building neural network graph...</p></div></div>';

            try {
                const response = await fetch(`/api/search/graph?q=${encodeURIComponent(query)}`);
                const graphData = await response.json();

                if (!graphData.nodes || graphData.nodes.length === 0) {
                    graphContainer.innerHTML = '<div class="flex items-center justify-center h-full text-slate-400">No connections found. Try a different search.</div>';
                    return;
                }

                // Initialize ECharts
                if (graphChart) {
                    graphChart.dispose();
                }
                graphChart = echarts.init(graphContainer);

                // Prepare nodes and edges for ECharts
                const nodes = graphData.nodes.map((node, idx) => ({
                    id: node.id,
                    name: node.name,
                    value: node.value || 30,
                    category: node.isCenter ? 0 : 1, // 0 = center, 1 = related
                    symbolSize: node.isCenter ? Math.max(40, node.value || 40) : Math.max(20, (node.value || 20) * 0.8),
                    itemStyle: {
                        color: node.isCenter ? '#06b6d4' : '#8b5cf6', // cyan for center, purple for related
                        borderColor: node.isCenter ? '#0891b2' : '#7c3aed',
                        borderWidth: 2,
                        shadowBlur: 10,
                        shadowColor: node.isCenter ? 'rgba(6, 182, 212, 0.5)' : 'rgba(139, 92, 246, 0.5)'
                    },
                    label: {
                        show: true,
                        fontSize: 12,
                        fontWeight: node.isCenter ? 'bold' : 'normal',
                        color: node.isCenter ? '#06b6d4' : '#cbd5e1',
                        formatter: (params) => {
                            const name = params.data.name || 'Node';
                            return name.length > 20 ? name.substring(0, 17) + '...' : name;
                        }
                    },
                    url: node.url,
                    content: node.content
                }));

                const edges = graphData.edges.map(edge => ({
                    source: edge.source,
                    target: edge.target,
                    value: edge.value || 1,
                    lineStyle: {
                        color: '#475569',
                        width: Math.max(1, edge.value * 2),
                        curveness: 0.3,
                        opacity: 0.6
                    },
                    label: {
                        show: false
                    }
                }));

                const option = {
                    backgroundColor: 'transparent',
                    tooltip: {
                        trigger: 'item',
                        formatter: (params) => {
                            if (params.dataType === 'node') {
                                return `
                                    <div style="padding: 8px;">
                                        <div style="font-weight: bold; color: #06b6d4; margin-bottom: 4px;">${params.data.name}</div>
                                        ${params.data.url ? `<div style="font-size: 11px; color: #94a3b8; margin-bottom: 4px;">${params.data.url}</div>` : ''}
                                        ${params.data.content ? `<div style="font-size: 11px; color: #cbd5e1; max-width: 300px;">${params.data.content}</div>` : ''}
                                    </div>
                                `;
                            }
                            return '';
                        },
                        backgroundColor: 'rgba(15, 23, 42, 0.95)',
                        borderColor: '#06b6d4',
                        borderWidth: 1,
                        textStyle: {
                            color: '#e2e8f0'
                        }
                    },
                    series: [{
                        type: 'graph',
                        layout: 'force',
                        data: nodes,
                        links: edges,
                        categories: [
                            { name: 'Center', itemStyle: { color: '#06b6d4' } },
                            { name: 'Related', itemStyle: { color: '#8b5cf6' } }
                        ],
                        roam: true,
                        label: {
                            show: true,
                            position: 'right',
                            formatter: '{b}'
                        },
                        labelLayout: {
                            hideOverlap: true
                        },
                        emphasis: {
                            focus: 'adjacency',
                            lineStyle: {
                                width: 4
                            }
                        },
                        force: {
                            repulsion: 200,
                            gravity: 0.1,
                            edgeLength: 150,
                            layoutAnimation: true
                        },
                        lineStyle: {
                            opacity: 0.6,
                            curveness: 0.3
                        }
                    }]
                };

                graphChart.setOption(option);

                // Handle node click
                graphChart.on('click', (params) => {
                    if (params.dataType === 'node' && params.data.url) {
                        recordInteraction(params.data.id, params.data.url);
                        window.location.href = `/view/${params.data.id}`;
                    }
                });

                // Handle window resize
                window.addEventListener('resize', () => {
                    if (graphChart) {
                        graphChart.resize();
                    }
                });

            } catch (e) {
                console.error('Graph render error:', e);
                graphContainer.innerHTML = `<div class="flex items-center justify-center h-full text-red-400">Error rendering graph: ${e.message}</div>`;
            }
        }

        async function performSearch() {
            const query = document.getElementById('search-input').value;
            if (!query) return;

            const resultsSection = document.getElementById('results-section');
            const resultsDiv = document.getElementById('results-area');
            const introCards = document.getElementById('intro-cards');

            // Hide intro cards and show results section
            if (introCards) introCards.style.display = 'none';
            if (resultsSection) {
                resultsSection.classList.remove('hidden');
                // Reset to list view
                switchTab('list');
            }

            // Store query for graph view
            currentSearchResults = query;

            resultsDiv.innerHTML = '<div class="text-center py-12"><div class="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600 mx-auto"></div><p class="mt-4 text-slate-500">Traversing the neural pathways...</p></div>';

            try {
                const response = await fetch(`/api/search?q=${encodeURIComponent(query)}`);
                const data = await response.json();

                resultsDiv.innerHTML = '';

                if (data.results.length === 0) {
                    resultsDiv.innerHTML = '<div class="text-center py-12 text-slate-500">No neural connections found. Try injecting more knowledge.</div>';
                    return;
                }

                data.results.forEach(item => {
                    const title = item.url || "Untitled Node";
                    const snippet = item.content || "No preview available.";
                    const score = (item.score * 100).toFixed(1);
                    
                    // HTML escape helper function (define before use)
                    const escapeHtml = (text) => {
                        if (!text) return '';
                        const div = document.createElement('div');
                        div.textContent = text;
                        return div.innerHTML;
                    };
                    
                    // Process highlighted snippet (if available)
                    let highlightedSnippet = snippet;
                    if (item.highlighted_snippet) {
                        // First replace highlight markers with temporary placeholders
                        const placeholderStart = '___HIGHLIGHT_START___';
                        const placeholderEnd = '___HIGHLIGHT_END___';
                        let textWithPlaceholders = item.highlighted_snippet
                            .replace(/\[\[HIGHLIGHT\]\](.*?)\[\[\/HIGHLIGHT\]\]/gi, 
                                     placeholderStart + '$1' + placeholderEnd);
                        
                        let escapedText = escapeHtml(textWithPlaceholders);
                        
                        // Replace placeholders with HTML tags
                        highlightedSnippet = escapedText
                            .replace(new RegExp(escapeHtml(placeholderStart), 'g'), 
                                    '<strong class="font-bold text-cyan-400 bg-cyan-500/20 px-1 rounded">')
                            .replace(new RegExp(escapeHtml(placeholderEnd), 'g'), '</strong>');
                    } else {
                        // If no highlighted snippet, still escape HTML
                        highlightedSnippet = escapeHtml(snippet);
                    }

                    const card = document.createElement('div');
                    card.className = 'bg-slate-800/50 backdrop-blur-sm p-6 rounded-xl shadow-lg border border-slate-700/50 hover:shadow-xl hover:border-cyan-500/50 transition-all hover:-translate-y-1 duration-200 cursor-pointer';
                    // Add click tracking
                    card.onclick = (e) => {
                        // Prevent default if it was a link click, we handle navigation
                        if (!e.target.closest('a')) {
                            recordInteraction(item.id, item.url);
                            window.location.href = `/view/${item.id}`;
                        }
                    };

                    // Create card elements
                    const titleLink = document.createElement('a');
                    titleLink.href = `/view/${item.id}`;
                    titleLink.className = 'text-lg font-bold text-cyan-400 hover:text-cyan-300 transition-colors line-clamp-1';
                    titleLink.textContent = title;
                    titleLink.onclick = (e) => {
                        e.stopPropagation();
                        recordInteraction(item.id, item.url);
                    };
                    
                    const scoreBadge = document.createElement('span');
                    scoreBadge.className = 'bg-cyan-500/20 text-cyan-400 text-xs font-bold px-2 py-1 rounded-full border border-cyan-500/30';
                    scoreBadge.textContent = `${score}% Match`;
                    
                    const headerDiv = document.createElement('div');
                    headerDiv.className = 'flex justify-between items-start mb-2';
                    headerDiv.appendChild(titleLink);
                    headerDiv.appendChild(scoreBadge);
                    
                    const urlDiv = document.createElement('div');
                    urlDiv.className = 'text-xs text-slate-400 mb-3 font-mono truncate';
                    urlDiv.textContent = item.url;
                    
                    const snippetPara = document.createElement('p');
                    snippetPara.className = 'text-slate-300 text-sm leading-relaxed line-clamp-3';
                    snippetPara.innerHTML = highlightedSnippet; // Directly use innerHTML to support HTML highlighting
                    
                    const footerDiv = document.createElement('div');
                    footerDiv.className = 'mt-4 pt-4 border-t border-slate-700/50 flex justify-between items-center';
                    footerDiv.innerHTML = `
                        <span class="text-xs text-slate-400">ID: ${item.id.substring(0, 8)}...</span>
                        <span class="text-sm font-medium text-slate-100 flex items-center gap-1">
                            Explore Node 
                            <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 8l4 4m0 0l-4 4m4-4H3"></path></svg>
                        </span>
                    `;
                    
                    card.appendChild(headerDiv);
                    card.appendChild(urlDiv);
                    card.appendChild(snippetPara);
                    card.appendChild(footerDiv);
                    
                    resultsDiv.appendChild(card);
                });

            } catch (e) {
                resultsDiv.innerHTML = `<div class="text-center text-red-500 py-8">Neural Link Error: ${e.message}</div>`;
            }
            
            // Also prepare graph data in background
            if (currentView === 'graph') {
                renderGraphView(query);
            }
        }

        async function uploadUrl() {
            const url = document.getElementById('url-input').value;
            const password = document.getElementById('url-password').value;
            
            if (!url) {
                showNotification("Please enter URL", "error");
                return;
            }
            
            if (!password) {
                showNotification("Please enter password", "error");
                document.getElementById('url-password').focus();
                return;
            }
            
            try {
                const formData = new FormData();
                formData.append('url', url);
                formData.append('password', password);
                
                const response = await fetch('/api/upload/url', { 
                    method: 'POST', 
                    body: formData 
                });
                
                const result = await response.json();
                
                if (response.ok) {
                    document.getElementById('url-input').value = '';
                    document.getElementById('url-password').value = '';
                    
                    // Immediately show progress bar when URL upload starts
                    const progressToast = document.getElementById('progress-toast');
                    const progressBarContainer = document.getElementById('progress-bar-container');
                    const progressBarIndeterminate = document.getElementById('progress-bar-indeterminate');
                    const progressTitle = document.getElementById('progress-title');
                    const progressCount = document.getElementById('progress-count');
                    const progressDetail = document.getElementById('progress-detail');
                    const progressUrl = document.getElementById('progress-url');
                    
                    if (progressToast) {
                        progressToast.classList.remove('translate-y-24', 'opacity-0');
                        
                        // Show indeterminate progress bar while waiting for WebSocket messages
                        if (progressBarContainer) progressBarContainer.classList.add('hidden');
                        if (progressBarIndeterminate) progressBarIndeterminate.classList.remove('hidden');
                        if (progressUrl) progressUrl.classList.add('hidden');
                        
                        if (progressTitle) progressTitle.textContent = "Starting URL Crawl...";
                        if (progressCount) {
                            progressCount.textContent = "0/1000 (0%)";
                            progressCount.className = "text-xs font-mono text-cyan-400 bg-cyan-500/20 px-2 py-0.5 rounded-full";
                        }
                        if (progressDetail) progressDetail.textContent = "Waiting for crawler to start...";
                        
                        console.log('Progress bar shown after URL upload');
                    } else {
                        console.error('Progress toast element not found!');
                    }
                    
                    showNotification(result.message || "URL injected into the cortex. Processing...");
                } else {
                    showNotification(result.detail || "Incorrect password, crawl rejected", "error");
                }
            } catch (error) {
                console.error("Failed to upload URL", error);
                showNotification("Upload failed: " + error.message, "error");
            }
        }

        async function uploadText() {
            const text = document.getElementById('text-input').value;
            if (!text) return;
            const formData = new FormData();
            formData.append('text', text);
            await fetch('/api/upload/text', { method: 'POST', body: formData });
            document.getElementById('text-input').value = '';
            showNotification("Text fragment absorbed. Processing...");
        }

        function formatBytes(bytes) {
            if (bytes === 0) return '0 Bytes';
            const k = 1024;
            const sizes = ['Bytes', 'KB', 'MB', 'GB'];
            const i = Math.floor(Math.log(bytes) / Math.log(k));
            return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
        }

        function uploadXMLDump() {
            const fileInput = document.getElementById('xml-dump-file-input');
            const baseUrl = document.getElementById('xml-dump-base-url').value;
            const maxPages = document.getElementById('xml-dump-max-pages').value;
            const uploadBtn = document.getElementById('xml-dump-upload-btn');
            const progressContainer = document.getElementById('xml-dump-progress-container');
            const progressBar = document.getElementById('xml-dump-progress-bar');
            const progressPercent = document.getElementById('xml-dump-progress-percent');
            const progressSize = document.getElementById('xml-dump-progress-size');
            const progressSpeed = document.getElementById('xml-dump-progress-speed');
            
            if (!fileInput.files || !fileInput.files[0]) {
                showNotification("Please select an XML Dump file", "error");
                return;
            }
            
            const file = fileInput.files[0];
            
            // Check file extension
            const validExtensions = ['.xml', '.bz2', '.gz'];
            const fileName = file.name.toLowerCase();
            const hasValidExtension = validExtensions.some(ext => fileName.endsWith(ext)) || 
                                     fileName.endsWith('.xml.bz2') || fileName.endsWith('.xml.gz');
            
            if (!hasValidExtension) {
                showNotification("Only XML dump file formats are supported (.xml, .xml.bz2, .xml.gz)", "error");
                return;
            }
            
            // Prepare form data
            const formData = new FormData();
            formData.append('file', file);
            if (baseUrl) {
                formData.append('base_url', baseUrl);
            }
            if (maxPages) {
                formData.append('max_pages', maxPages);
            }
            
            // Setup progress tracking
            const totalSize = file.size;
            let uploadedSize = 0;
            let startTime = Date.now();
            let lastUploaded = 0;
            let lastTime = startTime;
            
            // Show progress bar
            progressContainer.classList.remove('hidden');
            progressBar.style.width = '0%';
            progressPercent.textContent = '0%';
            progressSize.textContent = `0 KB / ${formatBytes(totalSize)}`;
            progressSpeed.textContent = '-- KB/s';
            
            // Disable upload button
            uploadBtn.disabled = true;
            uploadBtn.textContent = 'Uploading...';
            
            // Use XMLHttpRequest for upload progress support
            const xhr = new XMLHttpRequest();
            
            // Upload progress event
            xhr.upload.addEventListener('progress', (e) => {
                if (e.lengthComputable) {
                    uploadedSize = e.loaded;
                    const percent = Math.round((e.loaded / e.total) * 100);
                    
                    // Update progress bar
                    progressBar.style.width = percent + '%';
                    progressPercent.textContent = percent + '%';
                    progressSize.textContent = `${formatBytes(e.loaded)} / ${formatBytes(e.total)}`;
                    
                    // Calculate upload speed
                    const currentTime = Date.now();
                    const timeDelta = (currentTime - lastTime) / 1000; // seconds
                    if (timeDelta >= 0.5) { // Update speed every 500ms
                        const bytesDelta = e.loaded - lastUploaded;
                        const speed = bytesDelta / timeDelta; // bytes per second
                        progressSpeed.textContent = formatBytes(speed) + '/s';
                        
                        lastUploaded = e.loaded;
                        lastTime = currentTime;
                    }
                }
            });
            
            // Load event (upload complete)
            xhr.addEventListener('load', () => {
                if (xhr.status >= 200 && xhr.status < 300) {
                    try {
                        const result = JSON.parse(xhr.responseText);
                        showNotification(result.message || "XML Dump file received, parsing and importing...");
                        
                        // Hide progress bar after a short delay
                        setTimeout(() => {
                            progressContainer.classList.add('hidden');
                        }, 1000);
                        
                        // Clear form
                        fileInput.value = '';
                        document.getElementById('xml-dump-file-name').textContent = 'Select XML Dump file...';
                        document.getElementById('xml-dump-base-url').value = '';
                        document.getElementById('xml-dump-max-pages').value = '';
                    } catch (e) {
                        console.error("Failed to parse response", e);
                        showNotification("Upload completed but failed to parse response", "error");
                        progressContainer.classList.add('hidden');
                    }
                } else {
                    try {
                        const result = JSON.parse(xhr.responseText);
                        showNotification(result.detail || "XML Dump import failed", "error");
                    } catch (e) {
                        showNotification("Upload failed with status " + xhr.status, "error");
                    }
                    progressContainer.classList.add('hidden');
                }
                
                uploadBtn.disabled = false;
                uploadBtn.textContent = 'Import Dump';
            });
            
            // Error event
            xhr.addEventListener('error', () => {
                showNotification("Upload failed: Network error", "error");
                progressContainer.classList.add('hidden');
                uploadBtn.disabled = false;
                uploadBtn.textContent = 'Import Dump';
            });
            
            // Abort event
            xhr.addEventListener('abort', () => {
                showNotification("Upload cancelled", "error");
                progressContainer.classList.add('hidden');
                uploadBtn.disabled = false;
                uploadBtn.textContent = 'Import Dump';
            });
            
            // Send request
            xhr.open('POST', '/api/upload/xml-dump');
            xhr.send(formData);
        }

        // Enter key to search
        document.getElementById('search-input').addEventListener('keypress', function (e) {
            if (e.key === 'Enter') performSearch();
        });


        // XML Dump file input change handler
        document.getElementById('xml-dump-file-input').addEventListener('change', function(e) {
            const fileName = e.target.files[0] ? e.target.files[0].name : 'Select XML Dump file...';
            document.getElementById('xml-dump-file-name').textContent = fileName;
        });

        // Load feed on start
        loadFeed();
        loadTrending();

        async function loadTrending() {
            const trendingDiv = document.getElementById('trending-area');
            try {
                const response = await fetch('/api/trending?limit=3');
                const data = await response.json();

                if (!data.results || data.results.length === 0) {
                    trendingDiv.innerHTML = '<div class="col-span-full text-center py-8 text-slate-400">No trending topics yet. Start exploring!</div>';
                    return;
                }

                trendingDiv.innerHTML = '';
                data.results.forEach((item, index) => {
                    const p = item.payload;
                    const card = document.createElement('div');
                    card.className = 'bg-gradient-to-br from-orange-50 to-white p-5 rounded-xl border border-orange-100 shadow-sm hover:shadow-md transition-all relative overflow-hidden cursor-pointer';
                    card.onclick = () => window.location.href = `/view/${item.id}`;

                    card.innerHTML = `
                        <div class="absolute top-0 right-0 bg-orange-100 text-orange-600 text-xs font-bold px-3 py-1 rounded-bl-xl">#${index + 1}</div>
                        <div class="text-xs font-bold text-orange-400 mb-2 uppercase tracking-wider">Hot Topic</div>
                        <div class="text-lg font-bold text-slate-100 mb-2 line-clamp-1">${p.url || 'Untitled'}</div>
                        <div class="text-sm text-slate-500 line-clamp-2 mb-3">${p.content_preview || ''}</div>
                        <div class="flex items-center gap-2 text-xs text-slate-400 font-mono">
                            <span class="flex items-center gap-1 text-orange-500 font-bold">
                                <svg class="w-3 h-3" fill="currentColor" viewBox="0 0 20 20"><path d="M12.316 3.051a1 1 0 01.633 1.265l-4 12a1 1 0 11-1.898-.632l4-12a1 1 0 011.265-.633zM5.707 6.293a1 1 0 010 1.414L3.414 10l2.293 2.293a1 1 0 11-1.414 1.414l-3-3a1 1 0 010-1.414l3-3a1 1 0 011.414 0zm8.586 0a1 1 0 011.414 0l3 3a1 1 0 010 1.414l-3 3a1 1 0 11-1.414-1.414L16.586 10l-2.293-2.293a1 1 0 010-1.414z"/></svg>
                                ${item.clicks} Clicks
                            </span>
                        </div>
                    `;
                    trendingDiv.appendChild(card);
                });
            } catch (e) {
                trendingDiv.innerHTML = `<div class="col-span-full text-center text-red-400">Failed to load trending: ${e.message}</div>`;
            }
        }
    </script>
</body>

</html>