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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>SQL Query Agent</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .chat-container {
            height: calc(100vh - 200px);
        }
        .file-dropzone {
            border: 2px dashed #cbd5e0;
            transition: all 0.3s ease;
        }
        .file-dropzone.active {
            border-color: #4f46e5;
            background-color: #eef2ff;
        }
        .result-table {
            max-height: 300px;
            overflow-y: auto;
        }
        .typing-indicator span {
            animation: bounce 1.5s infinite ease-in-out;
        }
        .typing-indicator span:nth-child(2) {
            animation-delay: 0.2s;
        }
        .typing-indicator span:nth-child(3) {
            animation-delay: 0.4s;
        }
        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-5px); }
        }
        .sql-editor {
            font-family: 'Courier New', monospace;
            min-height: 100px;
        }
    </style>
</head>
<body class="bg-gray-50">
    <div class="container mx-auto px-4 py-8 max-w-6xl">
        <!-- Header -->
        <header class="mb-8">
            <div class="flex items-center justify-between">
                <div class="flex items-center space-x-3">
                    <i class="fas fa-database text-3xl text-indigo-600"></i>
                    <h1 class="text-2xl font-bold text-gray-800">SQL Query Agent</h1>
                </div>
                <div class="flex space-x-4">
                    <button id="darkModeToggle" class="p-2 rounded-full hover:bg-gray-200 dark:hover:bg-gray-700">
                        <i class="fas fa-moon text-gray-600"></i>
                    </button>
                    <button class="px-4 py-2 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 transition">
                        <i class="fas fa-question-circle mr-2"></i>Help
                    </button>
                </div>
            </div>
            <p class="text-gray-600 mt-2">Upload your Excel file or connect to a database to start querying</p>
        </header>

        <!-- Main Content -->
        <div class="grid grid-cols-1 lg:grid-cols-3 gap-6">
            <!-- Left Panel - Data Source Selection -->
            <div class="lg:col-span-1 bg-white rounded-xl shadow-md p-6">
                <h2 class="text-xl font-semibold mb-4 text-gray-800">Data Sources</h2>
                
                <!-- Tabs -->
                <div class="flex border-b mb-6">
                    <button id="excelTab" class="tab-btn active px-4 py-2 font-medium text-indigo-600 border-b-2 border-indigo-600">
                        <i class="fas fa-file-excel mr-2"></i>Excel File
                    </button>
                    <button id="sqlTab" class="tab-btn px-4 py-2 font-medium text-gray-500 hover:text-gray-700">
                        <i class="fas fa-database mr-2"></i>SQL Database
                    </button>
                </div>
                
                <!-- Excel Upload Section -->
                <div id="excelSection" class="data-source-section">
                    <div id="fileDropzone" class="file-dropzone rounded-lg p-8 text-center mb-4 cursor-pointer">
                        <i class="fas fa-cloud-upload-alt text-4xl text-gray-400 mb-3"></i>
                        <p class="text-gray-600">Drag & drop your Excel file here</p>
                        <p class="text-sm text-gray-500 mt-1">or click to browse files</p>
                        <input type="file" id="fileInput" class="hidden" accept=".xlsx, .xls, .csv">
                    </div>
                    <div id="fileInfo" class="hidden p-4 bg-gray-50 rounded-lg mb-4">
                        <div class="flex justify-between items-center">
                            <div>
                                <p class="font-medium text-gray-800" id="fileName">sample_data.xlsx</p>
                                <p class="text-sm text-gray-500" id="fileSize">2.4 MB</p>
                            </div>
                            <button id="removeFile" class="text-red-500 hover:text-red-700">
                                <i class="fas fa-times"></i>
                            </button>
                        </div>
                    </div>
                    <div class="mb-4">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Sheet Selection</label>
                        <select id="sheetSelect" class="w-full p-2 border border-gray-300 rounded-lg" disabled>
                            <option value="">Select a sheet</option>
                        </select>
                    </div>
                    <div class="mb-4">
                        <label class="block text-sm font-medium text-gray-700 mb-1">Preview</label>
                        <div class="bg-gray-50 p-2 rounded-lg border border-gray-200 overflow-x-auto">
                            <table class="min-w-full divide-y divide-gray-200">
                                <thead id="previewHeader" class="bg-gray-100">
                                    <!-- Headers will be populated here -->
                                </thead>
                                <tbody id="previewBody" class="divide-y divide-gray-200">
                                    <!-- Preview rows will be populated here -->
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
                
                <!-- SQL Connection Section -->
                <div id="sqlSection" class="data-source-section hidden">
                    <div class="space-y-4">
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Database Type</label>
                            <select class="w-full p-2 border border-gray-300 rounded-lg">
                                <option>MySQL</option>
                                <option>PostgreSQL</option>
                                <option>SQL Server</option>
                                <option>SQLite</option>
                                <option>Oracle</option>
                            </select>
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Host</label>
                            <input type="text" class="w-full p-2 border border-gray-300 rounded-lg" placeholder="localhost">
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Port</label>
                            <input type="text" class="w-full p-2 border border-gray-300 rounded-lg" placeholder="3306">
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Database Name</label>
                            <input type="text" class="w-full p-2 border border-gray-300 rounded-lg" placeholder="my_database">
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Username</label>
                            <input type="text" class="w-full p-2 border border-gray-300 rounded-lg" placeholder="username">
                        </div>
                        <div>
                            <label class="block text-sm font-medium text-gray-700 mb-1">Password</label>
                            <input type="password" class="w-full p-2 border border-gray-300 rounded-lg" placeholder="••••••••">
                        </div>
                        <button class="w-full py-2 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 transition">
                            <i class="fas fa-plug mr-2"></i>Connect
                        </button>
                    </div>
                </div>
                
                <div class="mt-6 pt-4 border-t border-gray-200">
                    <h3 class="text-sm font-medium text-gray-700 mb-2">Recent Connections</h3>
                    <div class="space-y-2">
                        <div class="flex items-center p-2 hover:bg-gray-50 rounded-lg cursor-pointer">
                            <i class="fas fa-file-excel text-green-500 mr-3"></i>
                            <div>
                                <p class="text-sm font-medium">sales_data.xlsx</p>
                                <p class="text-xs text-gray-500">Yesterday</p>
                            </div>
                        </div>
                        <div class="flex items-center p-2 hover:bg-gray-50 rounded-lg cursor-pointer">
                            <i class="fas fa-database text-blue-500 mr-3"></i>
                            <div>
                                <p class="text-sm font-medium">Production DB</p>
                                <p class="text-xs text-gray-500">2 days ago</p>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            
            <!-- Right Panel - Chat Interface -->
            <div class="lg:col-span-2 bg-white rounded-xl shadow-md overflow-hidden">
                <div class="p-6 border-b border-gray-200">
                    <h2 class="text-xl font-semibold text-gray-800">Query Assistant</h2>
                    <p class="text-sm text-gray-600">Ask questions about your data in natural language or write SQL queries</p>
                </div>
                
                <!-- Chat Container -->
                <div class="chat-container overflow-y-auto p-4 space-y-4">
                    <!-- Welcome Message -->
                    <div class="flex justify-start">
                        <div class="max-w-[80%] bg-indigo-50 rounded-lg p-4">
                            <div class="flex items-start">
                                <div class="flex-shrink-0 h-8 w-8 rounded-full bg-indigo-100 flex items-center justify-center">
                                    <i class="fas fa-robot text-indigo-600"></i>
                                </div>
                                <div class="ml-3">
                                    <h3 class="text-sm font-medium text-indigo-800">SQL Assistant</h3>
                                    <div class="mt-1 text-sm text-gray-700">
                                        <p>Hello! I can help you analyze your data. Please upload an Excel file or connect to a database to get started.</p>
                                        <p class="mt-2">You can ask questions like:</p>
                                        <ul class="list-disc pl-5 mt-1 space-y-1">
                                            <li>"Show me the top 5 customers by sales"</li>
                                            <li>"What's the average order value?"</li>
                                            <li>"Find all orders from last month"</li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <!-- Sample User Message -->
                    <div class="flex justify-end">
                        <div class="max-w-[80%] bg-indigo-600 rounded-lg p-4 text-white">
                            <p>Show me the top 5 products by revenue</p>
                        </div>
                    </div>
                    
                    <!-- Sample Assistant Response -->
                    <div class="flex justify-start">
                        <div class="max-w-[80%] bg-gray-50 rounded-lg p-4">
                            <div class="flex items-start">
                                <div class="flex-shrink-0 h-8 w-8 rounded-full bg-gray-100 flex items-center justify-center">
                                    <i class="fas fa-robot text-gray-600"></i>
                                </div>
                                <div class="ml-3">
                                    <h3 class="text-sm font-medium text-gray-800">SQL Assistant</h3>
                                    <div class="mt-1 text-sm text-gray-700">
                                        <p>Here are the top 5 products by revenue:</p>
                                        <div class="result-table mt-2 border border-gray-200 rounded-lg overflow-hidden">
                                            <table class="min-w-full divide-y divide-gray-200">
                                                <thead class="bg-gray-100">
                                                    <tr>
                                                        <th class="px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase">Product</th>
                                                        <th class="px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase">Revenue</th>
                                                    </tr>
                                                </thead>
                                                <tbody class="divide-y divide-gray-200">
                                                    <tr>
                                                        <td class="px-4 py-2">Premium Widget</td>
                                                        <td class="px-4 py-2">$12,450</td>
                                                    </tr>
                                                    <tr>
                                                        <td class="px-4 py-2">Basic Widget</td>
                                                        <td class="px-4 py-2">$8,720</td>
                                                    </tr>
                                                    <tr>
                                                        <td class="px-4 py-2">Deluxe Package</td>
                                                        <td class="px-4 py-2">$7,890</td>
                                                    </tr>
                                                    <tr>
                                                        <td class="px-4 py-2">Standard Package</td>
                                                        <td class="px-4 py-2">$5,430</td>
                                                    </tr>
                                                    <tr>
                                                        <td class="px-4 py-2">Add-on Service</td>
                                                        <td class="px-4 py-2">$3,210</td>
                                                    </tr>
                                                </tbody>
                                            </table>
                                        </div>
                                        <div class="mt-3 text-xs text-gray-500">
                                            <p>Generated SQL: <code class="bg-gray-200 px-1 rounded">SELECT product_name, SUM(revenue) as revenue FROM sales GROUP BY product_name ORDER BY revenue DESC LIMIT 5</code></p>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <!-- Typing Indicator (hidden by default) -->
                    <div id="typingIndicator" class="flex justify-start hidden">
                        <div class="max-w-[80%] bg-gray-50 rounded-lg p-4">
                            <div class="flex items-center">
                                <div class="flex-shrink-0 h-8 w-8 rounded-full bg-gray-100 flex items-center justify-center">
                                    <i class="fas fa-robot text-gray-600"></i>
                                </div>
                                <div class="ml-3 typing-indicator">
                                    <span class="inline-block h-2 w-2 rounded-full bg-gray-400 mx-1"></span>
                                    <span class="inline-block h-2 w-2 rounded-full bg-gray-400 mx-1"></span>
                                    <span class="inline-block h-2 w-2 rounded-full bg-gray-400 mx-1"></span>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                
                <!-- Input Area -->
                <div class="border-t border-gray-200 p-4 bg-gray-50">
                    <div class="flex items-start space-x-2">
                        <div class="flex-grow">
                            <div class="relative">
                                <div id="sqlEditor" class="sql-editor w-full p-3 border border-gray-300 rounded-lg bg-white focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500" contenteditable="true" placeholder="Type your question or SQL query here..."></div>
                                <div class="absolute right-2 bottom-2 flex space-x-1">
                                    <button class="p-1 text-gray-500 hover:text-indigo-600">
                                        <i class="fas fa-magic"></i>
                                    </button>
                                    <button class="p-1 text-gray-500 hover:text-indigo-600">
                                        <i class="fas fa-history"></i>
                                    </button>
                                </div>
                            </div>
                            <div class="flex items-center justify-between mt-2">
                                <div class="flex space-x-2">
                                    <button class="p-1 text-gray-500 hover:text-indigo-600">
                                        <i class="fas fa-paperclip"></i>
                                    </button>
                                    <button class="p-1 text-gray-500 hover:text-indigo-600">
                                        <i class="fas fa-code"></i>
                                    </button>
                                </div>
                                <div class="text-xs text-gray-500">
                                    <span id="charCount">0</span>/1000
                                </div>
                            </div>
                        </div>
                        <button id="sendButton" class="flex-shrink-0 h-12 w-12 rounded-full bg-indigo-600 text-white flex items-center justify-center hover:bg-indigo-700 transition">
                            <i class="fas fa-paper-plane"></i>
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script>
        // Tab switching functionality
        const excelTab = document.getElementById('excelTab');
        const sqlTab = document.getElementById('sqlTab');
        const excelSection = document.getElementById('excelSection');
        const sqlSection = document.getElementById('sqlSection');
        
        excelTab.addEventListener('click', () => {
            excelTab.classList.add('active', 'text-indigo-600', 'border-indigo-600');
            excelTab.classList.remove('text-gray-500');
            sqlTab.classList.remove('active', 'text-indigo-600', 'border-indigo-600');
            sqlTab.classList.add('text-gray-500');
            excelSection.classList.remove('hidden');
            sqlSection.classList.add('hidden');
        });
        
        sqlTab.addEventListener('click', () => {
            sqlTab.classList.add('active', 'text-indigo-600', 'border-indigo-600');
            sqlTab.classList.remove('text-gray-500');
            excelTab.classList.remove('active', 'text-indigo-600', 'border-indigo-600');
            excelTab.classList.add('text-gray-500');
            sqlSection.classList.remove('hidden');
            excelSection.classList.add('hidden');
        });
        
        // File upload functionality
        const fileDropzone = document.getElementById('fileDropzone');
        const fileInput = document.getElementById('fileInput');
        const fileInfo = document.getElementById('fileInfo');
        const fileName = document.getElementById('fileName');
        const fileSize = document.getElementById('fileSize');
        const removeFile = document.getElementById('removeFile');
        const sheetSelect = document.getElementById('sheetSelect');
        
        fileDropzone.addEventListener('click', () => fileInput.click());
        
        fileInput.addEventListener('change', (e) => {
            if (e.target.files.length > 0) {
                const file = e.target.files[0];
                fileName.textContent = file.name;
                fileSize.textContent = `${(file.size / (1024 * 1024)).toFixed(1)} MB`;
                fileInfo.classList.remove('hidden');
                fileDropzone.classList.add('hidden');
                
                // Simulate sheet selection (in a real app, you'd parse the Excel file)
                sheetSelect.innerHTML = `
                    <option value="">Select a sheet</option>
                    <option value="Sheet1">Sheet1</option>
                    <option value="Sheet2">Sheet2</option>
                    <option value="Orders">Orders</option>
                `;
                sheetSelect.disabled = false;
            }
        });
        
        removeFile.addEventListener('click', () => {
            fileInput.value = '';
            fileInfo.classList.add('hidden');
            fileDropzone.classList.remove('hidden');
            sheetSelect.innerHTML = '<option value="">Select a sheet</option>';
            sheetSelect.disabled = true;
            
            // Clear preview
            document.getElementById('previewHeader').innerHTML = '';
            document.getElementById('previewBody').innerHTML = '';
        });
        
        // Drag and drop functionality
        fileDropzone.addEventListener('dragover', (e) => {
            e.preventDefault();
            fileDropzone.classList.add('active');
        });
        
        fileDropzone.addEventListener('dragleave', () => {
            fileDropzone.classList.remove('active');
        });
        
        fileDropzone.addEventListener('drop', (e) => {
            e.preventDefault();
            fileDropzone.classList.remove('active');
            
            if (e.dataTransfer.files.length > 0) {
                fileInput.files = e.dataTransfer.files;
                const event = new Event('change');
                fileInput.dispatchEvent(event);
            }
        });
        
        // Sheet selection change
        sheetSelect.addEventListener('change', (e) => {
            if (e.target.value) {
                // Simulate loading data for the selected sheet
                const headers = ['ID', 'Product', 'Category', 'Price', 'Quantity'];
                const data = [
                    [1, 'Premium Widget', 'Widgets', 49.99, 120],
                    [2, 'Basic Widget', 'Widgets', 19.99, 350],
                    [3, 'Deluxe Package', 'Packages', 199.99, 45],
                    [4, 'Standard Package', 'Packages', 99.99, 80],
                    [5, 'Add-on Service', 'Services', 29.99, 210]
                ];
                
                const previewHeader = document.getElementById('previewHeader');
                const previewBody = document.getElementById('previewBody');
                
                // Build header
                previewHeader.innerHTML = '';
                const headerRow = document.createElement('tr');
                headers.forEach(header => {
                    const th = document.createElement('th');
                    th.className = 'px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase';
                    th.textContent = header;
                    headerRow.appendChild(th);
                });
                previewHeader.appendChild(headerRow);
                
                // Build body
                previewBody.innerHTML = '';
                data.forEach(row => {
                    const tr = document.createElement('tr');
                    row.forEach(cell => {
                        const td = document.createElement('td');
                        td.className = 'px-4 py-2 text-sm text-gray-700';
                        td.textContent = cell;
                        tr.appendChild(td);
                    });
                    previewBody.appendChild(tr);
                });
            }
        });
        
        // Chat functionality
        const sqlEditor = document.getElementById('sqlEditor');
        const sendButton = document.getElementById('sendButton');
        const typingIndicator = document.getElementById('typingIndicator');
        const charCount = document.getElementById('charCount');
        
        // Character count
        sqlEditor.addEventListener('input', () => {
            charCount.textContent = sqlEditor.textContent.length;
        });
        
        // Send message
        sendButton.addEventListener('click', () => {
            const message = sqlEditor.textContent.trim();
            if (message) {
                // Add user message to chat
                const chatContainer = document.querySelector('.chat-container');
                const userMessage = document.createElement('div');
                userMessage.className = 'flex justify-end';
                userMessage.innerHTML = `
                    <div class="max-w-[80%] bg-indigo-600 rounded-lg p-4 text-white">
                        <p>${message}</p>
                    </div>
                `;
                chatContainer.appendChild(userMessage);
                
                // Clear input
                sqlEditor.textContent = '';
                charCount.textContent = '0';
                
                // Show typing indicator
                typingIndicator.classList.remove('hidden');
                
                // Scroll to bottom
                chatContainer.scrollTop = chatContainer.scrollHeight;
                
                // Simulate assistant response after delay
                setTimeout(() => {
                    typingIndicator.classList.add('hidden');
                    
                    // Create assistant response
                    const assistantResponse = document.createElement('div');
                    assistantResponse.className = 'flex justify-start';
                    assistantResponse.innerHTML = `
                        <div class="max-w-[80%] bg-gray-50 rounded-lg p-4">
                            <div class="flex items-start">
                                <div class="flex-shrink-0 h-8 w-8 rounded-full bg-gray-100 flex items-center justify-center">
                                    <i class="fas fa-robot text-gray-600"></i>
                                </div>
                                <div class="ml-3">
                                    <h3 class="text-sm font-medium text-gray-800">SQL Assistant</h3>
                                    <div class="mt-1 text-sm text-gray-700">
                                        <p>Here are the results for your query:</p>
                                        <div class="result-table mt-2 border border-gray-200 rounded-lg overflow-hidden">
                                            <table class="min-w-full divide-y divide-gray-200">
                                                <thead class="bg-gray-100">
                                                    <tr>
                                                        <th class="px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase">Column 1</th>
                                                        <th class="px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase">Column 2</th>
                                                        <th class="px-4 py-2 text-left text-xs font-medium text-gray-500 uppercase">Column 3</th>
                                                    </tr>
                                                </thead>
                                                <tbody class="divide-y divide-gray-200">
                                                    <tr>
                                                        <td class="px-4 py-2">Value 1</td>
                                                        <td class="px-4 py-2">Value 2</td>
                                                        <td class="px-4 py-2">Value 3</td>
                                                    </tr>
                                                    <tr>
                                                        <td class="px-4 py-2">Value 4</td>
                                                        <td class="px-4 py-2">Value 5</td>
                                                        <td class="px-4 py-2">Value 6</td>
                                                    </tr>
                                                </tbody>
                                            </table>
                                        </div>
                                        <div class="mt-3 text-xs text-gray-500">
                                            <p>Generated SQL: <code class="bg-gray-200 px-1 rounded">SELECT * FROM ${sheetSelect.value || 'your_data'} WHERE condition</code></p>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    `;
                    chatContainer.appendChild(assistantResponse);
                    
                    // Scroll to bottom
                    chatContainer.scrollTop = chatContainer.scrollHeight;
                }, 1500);
            }
        });
        
        // Dark mode toggle
        const darkModeToggle = document.getElementById('darkModeToggle');
        darkModeToggle.addEventListener('click', () => {
            document.documentElement.classList.toggle('dark');
            const icon = darkModeToggle.querySelector('i');
            if (document.documentElement.classList.contains('dark')) {
                icon.classList.remove('fa-moon');
                icon.classList.add('fa-sun');
                icon.classList.remove('text-gray-600');
                icon.classList.add('text-yellow-300');
            } else {
                icon.classList.remove('fa-sun');
                icon.classList.add('fa-moon');
                icon.classList.remove('text-yellow-300');
                icon.classList.add('text-gray-600');
            }
        });
    </script>
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