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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>Advanced Graph Creator</title>
  <script src="https://cdn.tailwindcss.com"></script>
  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/luxon@3.0.2/build/global/luxon.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-luxon@1.2.0/dist/chartjs-adapter-luxon.min.js"></script>
  <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
  <style>
    .chart-container {
      position: relative;
      height: 60vh;
      width: 100%;
    }
    
    .hidden {
      display: none;
    }
    
    .data-point {
      display: flex;
      margin-bottom: 8px;
      align-items: center;
    }
    
    .data-point input {
      margin-right: 8px;
      padding: 6px;
      border: 1px solid #ddd;
      border-radius: 4px;
    }
    
    .remove-point {
      color: #ef4444;
      cursor: pointer;
      margin-left: 8px;
      font-size: 18px;
    }
    
    .custom-scrollbar {
      scrollbar-width: thin;
      scrollbar-color: #6b7280 #f3f4f6;
    }
    
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
    }
    
    .custom-scrollbar::-webkit-scrollbar-track {
      background: #f3f4f6;
    }
    
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background-color: #6b7280;
      border-radius: 20px;
    }
    
    .slide-in {
      animation: slideIn 0.3s ease-out forwards;
    }
    
    .slide-out {
      animation: slideOut 0.3s ease-out forwards;
    }
    
    @keyframes slideIn {
      from {
        transform: translateX(100%);
        opacity: 0;
      }
      to {
        transform: translateX(0);
        opacity: 1;
      }
    }
    
    @keyframes slideOut {
      from {
        transform: translateX(0);
        opacity: 1;
      }
      to {
        transform: translateX(100%);
        opacity: 0;
      }
    }
    
    .tooltip {
      position: absolute;
      background-color: rgba(0, 0, 0, 0.7);
      color: white;
      padding: 5px 10px;
      border-radius: 4px;
      font-size: 12px;
      pointer-events: none;
      z-index: 1000;
      white-space: nowrap;
    }
    
    .dataset-selector {
      margin-top: 8px;
      padding: 8px;
      border: 1px solid #e5e7eb;
      border-radius: 6px;
      background-color: #f9fafb;
    }
    
    .dataset-option {
      display: flex;
      align-items: center;
      padding: 4px 8px;
      margin: 4px 0;
      cursor: pointer;
      border-radius: 4px;
      transition: background-color 0.2s;
    }
    
    .dataset-option:hover {
      background-color: #f3f4f6;
    }
    
    .dataset-option.selected {
      background-color: #e0f2fe;
      border: 1px solid #0ea5e9;
    }
    
    .multi-input-container {
      border: 1px solid #e5e7eb;
      border-radius: 6px;
      padding: 8px;
      margin-top: 8px;
      background-color: #f9fafb;
    }
    
    .multi-data-point {
      display: flex;
      margin-bottom: 6px;
      align-items: center;
    }
    
    .multi-data-point input {
      margin-right: 6px;
      padding: 4px 6px;
      border: 1px solid #d1d5db;
      border-radius: 4px;
      font-size: 14px;
    }
    
    .remove-multi-point {
      color: #ef4444;
      cursor: pointer;
      margin-left: 6px;
      font-size: 16px;
    }
    
    /* Custom select styling */
    .select-wrapper {
      position: relative;
    }
    
    .select-wrapper::after {
      content: '▼';
      font-size: 10px;
      color: #6b7280;
      position: absolute;
      right: 10px;
      top: 50%;
      transform: translateY(-50%);
      pointer-events: none;
    }
    
    .color-preview {
      width: 16px;
      height: 16px;
      border-radius: 50%;
      display: inline-block;
      margin-right: 6px;
      vertical-align: middle;
    }
    
    /* Animation for chart update */
    @keyframes chartUpdate {
      0% { transform: scale(1); }
      50% { transform: scale(1.02); }
      100% { transform: scale(1); }
    }
    
    .chart-update {
      animation: chartUpdate 0.3s ease-out;
    }
    
    /* CSV separator styles */
    .separator-option {
      border: 1px solid #e5e7eb;
      padding: 8px;
      margin: 4px 0;
      border-radius: 6px;
      cursor: pointer;
      transition: all 0.2s;
    }
    
    .separator-option:hover {
      background-color: #f9fafb;
    }
    
    .separator-option.selected {
      border-color: #3b82f6;
      background-color: #eff6ff;
    }
    
    /* Info tooltip */
    .info-icon {
      display: inline-block;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background-color: #6b7280;
      color: white;
      text-align: center;
      line-height: 14px;
      font-size: 10px;
      margin-left: 4px;
      cursor: help;
    }
    
    .help-text {
      @apply bg-gray-700 text-white px-2 py-1 rounded text-xs absolute bottom-full left-1/2 transform -translate-x-1/2 mb-2 whitespace-nowrap opacity-0 transition-opacity duration-300;
      pointer-events: none;
      z-index: 1000;
      width: 200px;
      text-align: center;
    }
    
    .help-text::after {
      content: '';
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%);
      border: 6px solid transparent;
      border-top-color: #374151;
    }
    
    .info-icon:hover + .help-text {
      opacity: 1;
    }
  </style>
</head>
<body class="bg-gradient-to-br from-blue-50 to-indigo-100 min-h-screen font-sans">
  <div class="container mx-auto px-4 py-8">
    <!-- Header -->
    <header class="text-center mb-8">
      <h1 class="text-4xl font-bold text-indigo-800 mb-2">📊 Graph Creator</h1>
      <p class="text-lg text-gray-600">Create beautiful charts from your data with customizable options</p>
    </header>
    
    <div class="flex flex-col lg:flex-row gap-6">
      <!-- Left Panel: Controls -->
      <div class="lg:w-1/3">
        <div class="bg-white rounded-xl shadow-lg p-6 mb-6 transition-all duration-300 hover:shadow-xl">
          <h2 class="text-xl font-semibold text-gray-800 mb-4 flex items-center">
            <i class="fas fa-cogs mr-2 text-indigo-600"></i> Configuration
          </h2>
          
          <!-- Data Input Method -->
          <div class="mb-6">
            <label class="block text-sm font-medium text-gray-700 mb-2">Data Input Method</label>
            <div class="grid grid-cols-2 gap-2">
              <button id="manual-input-btn" class="py-2 px-4 bg-indigo-100 text-indigo-800 rounded-lg font-medium transition-colors duration-200 flex items-center justify-center hover:bg-indigo-200 active:bg-indigo-300">
                <i class="fas fa-keyboard mr-2"></i> Manual
              </button>
              <button id="file-input-btn" class="py-2 px-4 bg-gray-100 text-gray-700 rounded-lg font-medium transition-colors duration-200 flex items-center justify-center hover:bg-gray-200 active:bg-gray-300">
                <i class="fas fa-file-upload mr-2"></i> Upload
              </button>
            </div>
          </div>
          
          <!-- Manual Input Section -->
          <div id="manual-input" class="space-y-4">
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">Chart Title</label>
              <input type="text" id="chart-title" class="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="Enter chart title">
            </div>
            
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">X-axis Label</label>
              <input type="text" id="x-label" class="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="Enter X-axis label">
            </div>
            
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">Y-axis Label</label>
              <input type="text" id="y-label" class="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="Enter Y-axis label">
            </div>
            
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-2">Data Points</label>
              <div class="flex items-center mb-2">
                <span class="text-xs text-gray-500 bg-gray-100 px-2 py-1 rounded">Multiple Columns Mode</span>
              </div>
              <div id="multi-data-container" class="multi-input-container">
                <div id="multi-data-points-container" class="space-y-2 max-h-40 overflow-y-auto custom-scrollbar pr-2">
                  <div class="multi-data-point">
                    <input type="text" class="category-input w-1/4" placeholder="Category">
                    <input type="number" class="dataset1-input w-1/4" placeholder="Dataset 1">
                    <input type="number" class="dataset2-input w-1/4" placeholder="Dataset 2">
                    <i class="fas fa-trash remove-multi-point"></i>
                  </div>
                </div>
                <button id="add-multi-point" class="mt-2 flex items-center text-sm text-indigo-600 hover:text-indigo-800">
                  <i class="fas fa-plus mr-1"></i> Add Data Point
                </button>
              </div>
            </div>
            
            <!-- Dataset Configuration -->
            <div id="dataset-config" class="mt-4">
              <label class="block text-sm font-medium text-gray-700 mb-2">Dataset Labels</label>
              <div id="dataset-labels-container" class="space-y-2">
                <div class="flex">
                  <input type="text" id="dataset1-label" value="Dataset 1" class="w-3/4 px-3 py-1 border border-gray-300 rounded-l-lg focus:outline-none focus:ring-2 focus:ring-indigo-500">
                  <div class="w-1/4 bg-blue-100 text-blue-800 px-2 py-1 rounded-r-lg text-center">Color</div>
                </div>
                <div class="flex">
                  <input type="text" id="dataset2-label" value="Dataset 2" class="w-3/4 px-3 py-1 border border-gray-300 rounded-l-lg focus:outline-none focus:ring-2 focus:ring-indigo-500">
                  <div class="w-1/4 bg-green-100 text-green-800 px-2 py-1 rounded-r-lg text-center">Color</div>
                </div>
              </div>
            </div>
          </div>
          
          <!-- File Upload Section (Hidden by default) -->
          <div id="file-input" class="hidden space-y-4">
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">Upload CSV File</label>
              <input type="file" id="csv-file" accept=".csv" class="w-full px-3 py-2 border border-gray-300 rounded-lg file:mr-4 file:py-2 file:px-4 file:rounded-lg file:border-0 file:text-sm file:font-medium file:bg-indigo-50 file:text-indigo-700 hover:file:bg-indigo-100">
              <div class="flex items-center mt-1">
                <span class="text-xs text-gray-500">Upload a CSV file (first row should contain headers)</span>
                <span class="info-icon relative ml-1">i
                  <span class="help-text">
                    Supported file types: CSV (.csv). The first row should contain column headers.
                  </span>
                </span>
              </div>
            </div>
            
            <div class="space-y-3">
              <label class="block text-sm font-medium text-gray-700">CSV Separator</label>
              <div class="flex flex-wrap gap-2">
                <div class="separator-option selected" data-separator=",">
                  <div class="font-medium">Comma (,)</div>
                  <div class="text-xs text-gray-600">Most common format</div>
                </div>
                <div class="separator-option" data-separator=";">
                  <div class="font-medium">Semicolon (;)</div>
                  <div class="text-xs text-gray-600">Common in European systems</div>
                </div>
                <div class="separator-option" data-separator="\t">
                  <div class="font-medium">Tab</div>
                  <div class="text-xs text-gray-600">Tab character</div>
                </div>
                <div class="separator-option" data-separator="|">
                  <div class="font-medium">Pipe (|)</div>
                  <div class="text-xs text-gray-600">Vertical bar</div>
                </div>
              </div>
            </div>
            
            <div id="csv-preview" class="hidden">
              <h3 class="text-sm font-medium text-gray-700 mb-2">Data Preview</h3>
              <div id="csv-content" class="bg-gray-50 p-3 rounded-lg text-xs max-h-32 overflow-y-auto custom-scrollbar"></div>
              
              <div class="mt-3">
                <label class="block text-sm font-medium text-gray-700 mb-2">Select Data to Plot</label>
                <div class="select-wrapper">
                  <select id="x-axis-select" class="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500">
                    <option value="">Select X-axis column</option>
                  </select>
                </div>
                
                <div class="mt-2 dataset-selector">
                  <h4 class="text-sm font-medium text-gray-700 mb-1">Select Y-axis columns:</h4>
                  <div id="y-axis-options" class="space-y-1 max-h-32 overflow-y-auto custom-scrollbar"></div>
                </div>
              </div>
            </div>
          </div>
        </div>
        
        <!-- Chart Settings -->
        <div class="bg-white rounded-xl shadow-lg p-6 transition-all duration-300 hover:shadow-xl">
          <h2 class="text-xl font-semibold text-gray-800 mb-4 flex items-center">
            <i class="fas fa-sliders-h mr-2 text-indigo-600"></i> Chart Settings
          </h2>
          
          <div class="space-y-4">
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">Chart Type</label>
              <select id="chart-type" class="w-full px-3 py-2 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500">
                <option value="bar">Bar Chart</option>
                <option value="line">Line Chart</option>
                <option value="radar">Radar Chart</option>
                <option value="polarArea">Polar Area</option>
                <option value="bubble">Bubble Chart</option>
                <option value="scatter">Scatter Chart</option>
              </select>
            </div>
            
            <div id="line-options" class="space-y-3 hidden">
              <div class="flex items-center">
                <input type="checkbox" id="show-lines" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500" checked>
                <label for="show-lines" class="text-sm font-medium text-gray-700">Show Lines</label>
              </div>
              <div class="flex items-center">
                <input type="checkbox" id="show-points" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500" checked>
                <label for="show-points" class="text-sm font-medium text-gray-700">Show Points</label>
              </div>
            </div>
            
            <div id="scatter-options" class="space-y-3 hidden">
              <div class="flex items-center">
                <input type="checkbox" id="show-trendline" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500">
                <label for="show-trendline" class="text-sm font-medium text-gray-700">Show Trendline</label>
              </div>
            </div>
            
            <div id="color-scheme">
              <label class="block text-sm font-medium text-gray-700 mb-1">Color Scheme</label>
              <div class="grid grid-cols-3 gap-2">
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#3B82F6", "#10B981", "#F59E0B", "#EF4444", "#8B5CF6", "#06B6D4", "#EC4899", "#F97316"]'>
                  <div class="w-6 h-6 bg-gradient-to-br from-blue-500 to-cyan-500 rounded-full"></div>
                </button>
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#EC4899", "#DB2777", "#BE185D", "#9D174D", "#7E113B", "#C2410C", "#9A3412", "#7C2D12"]'>
                  <div class="w-6 h-6 bg-pink-500 rounded-full"></div>
                </button>
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#10B981", "#059669", "#047857", "#065F46", "#064E3B", "#16A34A", "#22C55E", "#4ADE80"]'>
                  <div class="w-6 h-6 bg-green-500 rounded-full"></div>
                </button>
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#F59E0B", "#D97706", "#B45309", "#92400E", "#78350F", "#F97316", "#EA580C", "#C2410C"]'>
                  <div class="w-6 h-6 bg-amber-500 rounded-full"></div>
                </button>
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#8B5CF6", "#7C3AED", "#6D28D9", "#5B21B6", "#4C1D95", "#A855F7", "#C026D3", "#BE185D"]'>
                  <div class="w-6 h-6 bg-purple-500 rounded-full"></div>
                </button>
                <button class="color-option p-2 rounded-lg flex items-center justify-center" data-colors='["#06B6D4", "#0891B2", "#0E7490", "#155E75", "#164E63", "#38BDF8", "#0EA5E9", "#0284C7"]'>
                  <div class="w-6 h-6 bg-cyan-500 rounded-full"></div>
                </button>
              </div>
            </div>
            
            <div>
              <label class="block text-sm font-medium text-gray-700 mb-1">Animation Duration (ms)</label>
              <input type="range" id="animation-duration" min="0" max="3000" value="1000" class="w-full h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer slider">
              <div class="flex justify-between text-xs text-gray-500 mt-1">
                <span>0ms</span>
                <span id="duration-value">1000ms</span>
                <span>3000ms</span>
              </div>
            </div>
            
            <button id="generate-btn" class="w-full py-3 px-4 bg-indigo-600 hover:bg-indigo-700 focus:ring-indigo-500 focus:ring-offset-indigo-200 text-white transition ease-in duration-200 text-center text-base font-semibold shadow-md focus:outline-none focus:ring-2 focus:ring-offset-2 rounded-lg">
              <i class="fas fa-chart-line mr-2"></i> Generate Chart
            </button>
            
            <button id="download-btn" class="w-full py-2 px-4 bg-gray-600 hover:bg-gray-700 text-white transition ease-in duration-200 text-center text-sm font-semibold shadow-md focus:outline-none rounded-lg flex items-center justify-center">
              <i class="fas fa-download mr-2"></i> Download Chart
            </button>
          </div>
        </div>
      </div>
      
      <!-- Right Panel: Chart -->
      <div class="lg:w-2/3">
        <div class="bg-white rounded-xl shadow-lg p-6 h-full transition-all duration-300 hover:shadow-xl">
          <div class="flex justify-between items-center mb-4">
            <h2 class="text-xl font-semibold text-gray-800 flex items-center">
              <i class="fas fa-chart-bar mr-2 text-indigo-600"></i> <span id="chart-title-display">Your Chart</span>
            </h2>
            <div class="flex space-x-2">
              <button id="export-data-btn" class="p-2 text-gray-500 hover:text-gray-700 hover:bg-gray-100 rounded-lg transition-colors duration-200" title="Export Data">
                <i class="fas fa-file-export"></i>
              </button>
              <button id="fullscreen-btn" class="p-2 text-gray-500 hover:text-gray-700 hover:bg-gray-100 rounded-lg transition-colors duration-200">
                <i class="fas fa-expand"></i>
              </button>
            </div>
          </div>
          
          <div class="chart-container relative">
            <canvas id="graph" class="w-full h-full"></canvas>
            <div id="empty-state" class="absolute inset-0 flex flex-col items-center justify-center text-gray-400">
              <i class="fas fa-chart-line text-6xl mb-4 opacity-50"></i>
              <p class="text-lg font-medium">No data to display</p>
              <p class="text-sm">Configure your data and settings, then click "Generate Chart"</p>
            </div>
          </div>
          
          <div id="chart-info" class="mt-4 text-sm text-gray-500 hidden">
            <div class="flex justify-between">
              <span>Chart Statistics:</span>
              <span id="data-count">0 points</span>
            </div>
          </div>
        </div>
      </div>
    </div>
    
    <!-- Toast Notification -->
    <div id="toast" class="fixed bottom-5 right-5 bg-gray-800 text-white px-4 py-3 rounded-lg shadow-lg flex items-center hidden transition-all duration-300 z-50">
      <i class="fas fa-check-circle mr-2"></i>
      <span id="toast-message">Chart downloaded successfully!</span>
    </div>
    
    <!-- Fullscreen Modal -->
    <div id="fullscreen-modal" class="fixed inset-0 bg-black bg-opacity-90 z-50 hidden flex items-center justify-center p-4">
      <div class="relative w-full max-w-5xl">
        <button id="close-fullscreen" class="absolute -top-12 right-0 text-white text-2xl hover:text-gray-300 transition-colors duration-200">
          <i class="fas fa-times"></i>
        </button>
        <h3 id="fullscreen-title" class="text-white text-xl mb-4 text-center"></h3>
        <div class="bg-white rounded-lg p-2">
          <canvas id="fullscreen-chart" class="w-full h-auto"></canvas>
        </div>
      </div>
    </div>
  </div>

  <script>
    document.addEventListener('DOMContentLoaded', function() {
      // Elements
      const manualInputBtn = document.getElementById('manual-input-btn');
      const fileInputBtn = document.getElementById('file-input-btn');
      const manualInput = document.getElementById('manual-input');
      const fileInput = document.getElementById('file-input');
      const csvFile = document.getElementById('csv-file');
      const csvPreview = document.getElementById('csv-preview');
      const csvContent = document.getElementById('csv-content');
      const addMultiPointBtn = document.getElementById('add-multi-point');
      const multiDataPointsContainer = document.getElementById('multi-data-points-container');
      const xLabel = document.getElementById('x-label');
      const yLabel = document.getElementById('y-label');
      const chartType = document.getElementById('chart-type');
      const lineOptions = document.getElementById('line-options');
      const scatterOptions = document.getElementById('scatter-options');
      const showLines = document.getElementById('show-lines');
      const showPoints = document.getElementById('show-points');
      const showTrendline = document.getElementById('show-trendline');
      const colorScheme = document.getElementById('color-scheme');
      const colorOptions = document.querySelectorAll('.color-option');
      const animationDuration = document.getElementById('animation-duration');
      const durationValue = document.getElementById('duration-value');
      const generateBtn = document.getElementById('generate-btn');
      const downloadBtn = document.getElementById('download-btn');
      const chartTitle = document.getElementById('chart-title');
      const chartTitleDisplay = document.getElementById('chart-title-display');
      const emptyState = document.getElementById('empty-state');
      const toast = document.getElementById('toast');
      const toastMessage = document.getElementById('toast-message');
      const fullscreenBtn = document.getElementById('fullscreen-btn');
      const fullscreenModal = document.getElementById('fullscreen-modal');
      const closeFullscreen = document.getElementById('close-fullscreen');
      const fullscreenTitle = document.getElementById('fullscreen-title');
      const graph = document.getElementById('graph');
      const fullscreenChart = document.getElementById('fullscreen-chart');
      const xAxisSelect = document.getElementById('x-axis-select');
      const yAxisOptions = document.getElementById('y-axis-options');
      const chartInfo = document.getElementById('chart-info');
      const dataCount = document.getElementById('data-count');
      const exportDataBtn = document.getElementById('export-data-btn');
      const separatorOptions = document.querySelectorAll('.separator-option');
      
      // Dataset elements
      const dataset1Label = document.getElementById('dataset1-label');
      const dataset2Label = document.getElementById('dataset2-label');
      
      // Chart instance
      let chart = null;
      let fullscreenChartInstance = null;
      let currentColors = ['#3B82F6', '#10B981', '#F59E0B', '#EF4444', '#8B5CF6', '#06B6D4', '#EC4899', '#F97316'];
      let csvHeaders = [];
      let csvData = [];
      let selectedYColumns = [];
      let currentSeparator = ',';
      
      // Initialize chart with empty data
      function initChart() {
        return new Chart(graph, {
          type: 'bar',
          data: {
            labels: [],
            datasets: []
          },
          options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
              legend: {
                display: true,
                position: 'bottom'
              },
              tooltip: {
                backgroundColor: 'rgba(0, 0, 0, 0.8)',
                titleColor: '#fff',
                bodyColor: '#fff',
                borderColor: '#333',
                borderWidth: 1,
                cornerRadius: 6,
                displayColors: true
              }
            },
            scales: {
              y: {
                beginAtZero: true,
                grid: {
                  color: 'rgba(0, 0, 0, 0.05)'
                },
                ticks: {
                  color: '#6b7280'
                }
              },
              x: {
                grid: {
                  color: 'rgba(0, 0, 0, 0.05)'
                },
                ticks: {
                  color: '#6b7280'
                }
              }
            }
          }
        });
      }
      
      // Initialize chart
      chart = initChart();
      
      // Event Listeners
      manualInputBtn.addEventListener('click', function() {
        manualInputBtn.classList.add('bg-indigo-100', 'text-indigo-800');
        manualInputBtn.classList.remove('bg-gray-100', 'text-gray-700');
        fileInputBtn.classList.remove('bg-indigo-100', 'text-indigo-800');
        fileInputBtn.classList.add('bg-gray-100', 'text-gray-700');
        manualInput.classList.remove('hidden');
        fileInput.classList.add('hidden');
      });
      
      fileInputBtn.addEventListener('click', function() {
        fileInputBtn.classList.add('bg-indigo-100', 'text-indigo-800');
        fileInputBtn.classList.remove('bg-gray-100', 'text-gray-700');
        manualInputBtn.classList.remove('bg-indigo-100', 'text-indigo-800');
        manualInputBtn.classList.add('bg-gray-100', 'text-gray-700');
        fileInput.classList.remove('hidden');
        manualInput.classList.add('hidden');
      });
      
      // Add new multi data point
      addMultiPointBtn.addEventListener('click', function() {
        const point = document.createElement('div');
        point.className = 'multi-data-point';
        point.innerHTML = `
          <input type="text" class="category-input w-1/4" placeholder="Category">
          <input type="number" class="dataset1-input w-1/4" placeholder="Dataset 1">
          <input type="number" class="dataset2-input w-1/4" placeholder="Dataset 2">
          <i class="fas fa-trash remove-multi-point"></i>
        `;
        multiDataPointsContainer.appendChild(point);
        
        // Add event listener to remove button
        point.querySelector('.remove-multi-point').addEventListener('click', function() {
          multiDataPointsContainer.removeChild(point);
        });
      });
      
      // Remove multi data point
      multiDataPointsContainer.addEventListener('click', function(e) {
        if (e.target.classList.contains('remove-multi-point')) {
          const point = e.target.closest('.multi-data-point');
          if (multiDataPointsContainer.children.length > 1) {
            multiDataPointsContainer.removeChild(point);
          }
        }
      });
      
      // Handle CSV separator selection
      separatorOptions.forEach(option => {
        option.addEventListener('click', function() {
          separatorOptions.forEach(opt => {
            opt.classList.remove('selected');
          });
          this.classList.add('selected');
          
          // Update the current separator
          currentSeparator = this.dataset.separator;
          
          // If a file is already loaded, re-parse it with the new separator
          if (csvFile.files[0]) {
            const file = csvFile.files[0];
            const reader = new FileReader();
            reader.onload = function(e) {
              const content = e.target.result;
              
              // Parse CSV data with the selected separator
              parseCSVData(content);
            };
            reader.readAsText(file);
          }
        });
      });
      
      // Handle file upload
      csvFile.addEventListener('change', function(e) {
        const file = e.target.files[0];
        if (!file) return;
        
        const reader = new FileReader();
        reader.onload = function(e) {
          const content = e.target.result;
          
          // Parse CSV data with the selected separator
          parseCSVData(content);
        };
        reader.readAsText(file);
      });
      
      // Function to parse CSV data
      function parseCSVData(content) {
        // Replace the tab literal with actual tab character
        const separator = currentSeparator === '\\t' ? '\t' : currentSeparator;
        
        // Split the content into lines
        const lines = content.split('\n');
        
        // Parse the CSV data
        csvData = [];
        for (let i = 0; i < lines.length; i++) {
          if (lines[i].trim() === '') continue;
          
          // Handle quoted fields that may contain the separator
          let rowData = [];
          let inQuotes = false;
          let field = '';
          
          for (let j = 0; j < lines[i].length; j++) {
            let char = lines[i][j];
            
            // Handle quoted fields
            if (char === '"') {
              if (inQuotes && j < lines[i].length - 1 && lines[i][j + 1] === '"') {
                // Two consecutive quotes represent a literal quote in the field
                field += '"';
                j++; // Skip the next quote
              } else {
                inQuotes = !inQuotes;
              }
            } else if (char === separator && !inQuotes) {
              // End of field
              rowData.push(field);
              field = '';
            } else {
              // Regular character
              field += char;
            }
          }
          
          // Don't forget the last field
          if (field.length > 0 || lines[i][lines[i].length - 1] === separator) {
            // The last character was a separator, so add an empty field
            rowData.push(field);
          }
          
          csvData.push(rowData.map(cell => cell.trim()));
        }
        
        // Extract headers from first row
        if (csvData.length > 0) {
          csvHeaders = csvData[0];
          
          // Display preview
          let previewHTML = '<table class="w-full text-xs">';
          // Show headers
          previewHTML += '<tr class="bg-gray-100">';
          csvHeaders.forEach(header => {
            previewHTML += `<th class="px-2 py-1 text-left border-b">${header || 'Empty'}</th>`;
          });
          previewHTML += '</tr>';
          
          // Show data rows (max 5)
          for (let i = 1; i < Math.min(csvData.length, 6); i++) {
            previewHTML += '<tr>';
            csvData[i].forEach(cell => {
              previewHTML += `<td class="px-2 py-1 border-b">${cell || 'Empty'}</td>`;
            });
            previewHTML += '</tr>';
          }
          
          if (csvData.length > 6) {
            previewHTML += '<tr><td colspan="' + csvHeaders.length + '" class="px-2 py-1 text-center text-gray-500">... and ' + (csvData.length - 6) + ' more rows</td></tr>';
          }
          
          previewHTML += '</table>';
          csvContent.innerHTML = previewHTML;
          csvPreview.classList.remove('hidden');
          
          // Populate X-axis select
          xAxisSelect.innerHTML = '<option value="">Select X-axis column</option>';
          csvHeaders.forEach((header, index) => {
            const option = document.createElement('option');
            option.value = index;
            option.textContent = header || `Column ${index + 1}`;
            xAxisSelect.appendChild(option);
          });
          
          // Populate Y-axis options
          yAxisOptions.innerHTML = '';
          csvHeaders.forEach((header, index) => {
            const optionDiv = document.createElement('div');
            optionDiv.className = 'flex items-center dataset-option';
            optionDiv.dataset.column = index;
            optionDiv.innerHTML = `
              <input type="checkbox" id="y-col-${index}" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500">
              <label for="y-col-${index}" class="text-sm font-medium text-gray-700">${header || `Column ${index + 1}`}</label>
            `;
            optionDiv.querySelector('input').addEventListener('change', function() {
              if (this.checked) {
                if (!selectedYColumns.includes(parseInt(index))) {
                  selectedYColumns.push(parseInt(index));
                }
              } else {
                selectedYColumns = selectedYColumns.filter(col => col !== parseInt(index));
              }
            });
            yAxisOptions.appendChild(optionDiv);
          });
        }
      }
      
      // Update animation duration display
      animationDuration.addEventListener('input', function() {
        durationValue.textContent = `${this.value}ms`;
      });
      
      // Apply color scheme
      colorOptions.forEach(option => {
        option.addEventListener('click', function() {
          colorOptions.forEach(opt => {
            opt.classList.remove('ring-2', 'ring-indigo-500');
          });
          this.classList.add('ring-2', 'ring-indigo-500');
          currentColors = JSON.parse(this.dataset.colors);
        });
      });
      
      // Set default color scheme
      colorOptions[0].classList.add('ring-2', 'ring-indigo-500');
      
      // Chart type change
      chartType.addEventListener('change', function() {
        if (this.value === 'line') {
          lineOptions.classList.remove('hidden');
          scatterOptions.classList.add('hidden');
        } else if (this.value === 'scatter') {
          lineOptions.classList.add('hidden');
          scatterOptions.classList.remove('hidden');
        } else {
          lineOptions.classList.add('hidden');
          scatterOptions.classList.add('hidden');
        }
      });
      
      // Generate chart
      generateBtn.addEventListener('click', function() {
        // Get data based on input method
        if (manualInput.classList.contains('hidden')) {
          // File input method
          const file = csvFile.files[0];
          if (!file) {
            showToast('Please select a CSV file');
            return;
          }
          
          const xColumn = xAxisSelect.value;
          if (!xColumn) {
            showToast('Please select an X-axis column');
            return;
          }
          
          if (selectedYColumns.length === 0) {
            showToast('Please select at least one Y-axis column');
            return;
          }
          
          // Extract data for chart
          const labels = [];
          const datasets = [];
          
          // Use headers as labels if the selected X column contains non-numeric data
          // Otherwise use the values from that column
          for (let i = 1; i < csvData.length; i++) {
            if (csvData[i].length > xColumn) {
              labels.push(csvData[i][xColumn]);
            } else {
              labels.push(`Row ${i}`);
            }
          }
          
          // Create dataset for each selected Y column
          selectedYColumns.forEach((colIndex, datasetIndex) => {
            const dataset = {
              label: csvHeaders[colIndex] || `Dataset ${datasetIndex + 1}`,
              data: [],
              backgroundColor: currentColors[datasetIndex % currentColors.length],
              borderColor: currentColors[datasetIndex % currentColors.length],
              borderWidth: 1
            };
            
            for (let i = 1; i < csvData.length; i++) {
              if (csvData[i].length > colIndex) {
                const value = parseFloat(csvData[i][colIndex]);
                if (!isNaN(value)) {
                  dataset.data.push(value);
                } else {
                  dataset.data.push(null);
                }
              } else {
                dataset.data.push(null);
              }
            }
            
            datasets.push(dataset);
          });
          
          createChart(labels, datasets);
        } else {
          // Manual input method
          const points = multiDataPointsContainer.querySelectorAll('.multi-data-point');
          let labels = [];
          let datasets = [
            {
              label: dataset1Label.value,
              data: [],
              backgroundColor: currentColors[0],
              borderColor: currentColors[0],
              borderWidth: 1
            },
            {
              label: dataset2Label.value,
              data: [],
              backgroundColor: currentColors[1],
              borderColor: currentColors[1],
              borderWidth: 1
            }
          ];
          
          let isValid = true;
          let hasData = false;
          
          points.forEach(point => {
            const category = point.querySelector('.category-input').value;
            const value1 = point.querySelector('.dataset1-input').value;
            const value2 = point.querySelector('.dataset2-input').value;
            
            if (category) {
              labels.push(category);
              hasData = true;
            }
            
            if (value1 !== '') {
              const num1 = parseFloat(value1);
              if (!isNaN(num1)) {
                datasets[0].data.push(num1);
              } else {
                datasets[0].data.push(null);
              }
            } else if (category) {
              datasets[0].data.push(null);
            }
            
            if (value2 !== '') {
              const num2 = parseFloat(value2);
              if (!isNaN(num2)) {
                datasets[1].data.push(num2);
              } else {
                datasets[1].data.push(null);
              }
            } else if (category) {
              datasets[1].data.push(null);
            }
            
            if ((value1 !== '' || value2 !== '') && !category) {
              isValid = false;
            }
          });
          
          // Remove datasets that have no data
          datasets = datasets.filter(dataset => dataset.data.some(val => val !== null));
          
          if (!isValid) {
            showToast('Please fill in category names for data points');
            return;
          }
          
          if (!hasData) {
            showToast('Please add at least one data point with category');
            return;
          }
          
          if (datasets.length === 0) {
            showToast('Please add at least one data value');
            return;
          }
          
          createChart(labels, datasets);
        }
      });
      
      // Create chart with data
      function createChart(labels, datasets) {
        // Update chart title
        const title = chartTitle.value || 'Your Chart';
        chartTitleDisplay.textContent = title;
        
        // Count data points
        const pointCount = datasets.reduce((total, dataset) => {
          return total + dataset.data.filter(val => val !== null).length;
        }, 0);
        
        dataCount.textContent = `${pointCount} points`;
        chartInfo.classList.remove('hidden');
        
        // Destroy existing chart
        if (chart) {
          chart.destroy();
        }
        
        // Process labels if they look like dates or numbers
        let xAxisType = 'category';
        let allLabelsAreNumbers = true;
        let allLabelsAreDates = true;
        
        labels.forEach(label => {
          const strLabel = String(label);
          // Check if it's a number
          if (isNaN(parseFloat(strLabel))) {
            allLabelsAreNumbers = false;
          }
          // Check if it's a date (very basic check)
          if (!/\d{4}-\d{2}-\d{2}/.test(strLabel) && 
              !/\d{2}\/\d{2}\/\d{4}/.test(strLabel) && 
              isNaN(Date.parse(strLabel))) {
            allLabelsAreDates = false;
          }
        });
        
        if (allLabelsAreNumbers && chartType.value !== 'pie' && chartType.value !== 'doughnut') {
          xAxisType = 'linear';
          labels = labels.map(label => parseFloat(label));
        } else if (allLabelsAreDates) {
          xAxisType = 'time';
          // Chart.js with Luxon adapter will handle the date parsing
        }
        
        // Chart configuration
        const chartConfig = {
          type: chartType.value,
          data: {
            labels: labels,
            datasets: datasets
          },
          options: {
            responsive: true,
            maintainAspectRatio: false,
            animation: {
              duration: parseInt(animationDuration.value)
            },
            plugins: {
              title: {
                display: true,
                text: title,
                font: {
                  size: 16
                }
              },
              legend: {
                display: true,
                position: 'bottom'
              },
              tooltip: {
                backgroundColor: 'rgba(0, 0, 0, 0.8)',
                titleColor: '#fff',
                bodyColor: '#fff',
                borderColor: '#333',
                borderWidth: 1,
                cornerRadius: 6,
                displayColors: true
              }
            },
            scales: {
              y: {
                beginAtZero: true,
                grid: {
                  color: 'rgba(0, 0, 0, 0.05)'
                },
                ticks: {
                  color: '#6b7280'
                },
                title: {
                  display: true,
                  text: yLabel.value || 'Value',
                  color: '#6b7280'
                }
              }
            }
          }
        };
        
        // Configure X-axis based on type
        if (xAxisType === 'linear') {
          chartConfig.options.scales.x = {
            type: 'linear',
            grid: {
              color: 'rgba(0, 0, 0, 0.05)'
            },
            ticks: {
              color: '#6b7280'
            },
            title: {
              display: true,
              text: xLabel.value || 'Value',
              color: '#6b7280'
            }
          };
        } else if (xAxisType === 'time') {
          chartConfig.options.scales.x = {
            type: 'time',
            time: {
              tooltipFormat: 'll'
            },
            grid: {
              color: 'rgba(0, 0, 0, 0.05)'
            },
            ticks: {
              color: '#6b7280'
            },
            title: {
              display: true,
              text: xLabel.value || 'Date',
              color: '#6b7280'
            }
          };
        } else {
          chartConfig.options.scales.x = {
            grid: {
              color: 'rgba(0, 0, 0, 0.05)'
            },
            ticks: {
              color: '#6b7280'
            },
            title: {
              display: true,
              text: xLabel.value || 'Category',
              color: '#6b7280'
            }
          };
        }
        
        // Special configurations for different chart types
        datasets.forEach((dataset, index) => {
          if (chartType.value === 'bar') {
            dataset.backgroundColor = currentColors[index % currentColors.length];
            dataset.borderColor = currentColors[index % currentColors.length];
          } else if (chartType.value === 'radar') {
            dataset.backgroundColor = `${currentColors[index % currentColors.length]}44`; // 44 for 25% opacity
            dataset.borderColor = currentColors[index % currentColors.length];
          } else if (chartType.value === 'line') {
            dataset.backgroundColor = `${currentColors[index % currentColors.length]}1A`; // 1A for 10% opacity
            dataset.borderColor = currentColors[index % currentColors.length];
            dataset.borderWidth = 3;
            dataset.pointBackgroundColor = currentColors[index % currentColors.length];
            dataset.pointBorderColor = '#fff';
            dataset.pointBorderWidth = 2;
            dataset.pointRadius = showPoints.checked ? 4 : 0;
            
            if (!showLines.checked) {
              dataset.borderWidth = 0;
            }
            
            if (!showPoints.checked) {
              dataset.pointRadius = 0;
            }
          } else if (chartType.value === 'scatter') {
            dataset.pointBackgroundColor = currentColors[index % currentColors.length];
            dataset.pointBorderColor = '#fff';
            dataset.pointBorderWidth = 1;
            dataset.pointRadius = 6;
            chartConfig.options.scales.x.title.display = true;
            
            // Add trendline if requested
            if (showTrendline.checked) {
              // Calculate linear regression
              const data = dataset.data;
              let sumX = 0, sumY = 0, sumXY = 0, sumXX = 0;
              let validPoints = 0;
              
              for (let i = 0; i < data.length; i++) {
                if (data[i] !== null) {
                  sumX += i;
                  sumY += data[i];
                  sumXY += i * data[i];
                  sumXX += i * i;
                  validPoints++;
                }
              }
              
              if (validPoints > 1) {
                const slope = (validPoints * sumXY - sumX * sumY) / (validPoints * sumXX - sumX * sumX);
                const intercept = (sumY - slope * sumX) / validPoints;
                
                // Add trendline dataset
                const trendData = [];
                const startX = 0;
                const endX = data.length - 1;
                trendData.push({x: startX, y: slope * startX + intercept});
                trendData.push({x: endX, y: slope * endX + intercept});
                
                chartConfig.data.datasets.push({
                  label: `${dataset.label} Trendline`,
                  data: trendData,
                  showLine: true,
                  pointRadius: 0,
                  borderColor: dataset.borderColor,
                  borderDash: [5, 5],
                  borderWidth: 2
                });
              }
            }
            
            // For scatter, we need to format data as {x, y} objects
            const xLabels = chartConfig.data.labels;
            const scatterData = [];
            for (let i = 0; i < data.length; i++) {
              if (data[i] !== null) {
                let xVal;
                // If labels are numbers, use them as X values
                if (!isNaN(parseFloat(xLabels[i]))) {
                  xVal = parseFloat(xLabels[i]);
                } else {
                  xVal = i; // Otherwise use index
                }
                scatterData.push({x: xVal, y: data[i]});
              }
            }
            
            // Clear the original data and replace with scatter data
            dataset.data = scatterData;
            
            // Update config for scatter
            if (xAxisType === 'linear' && !isNaN(parseFloat(xLabels[0]))) {
              chartConfig.options.scales.x.type = 'linear';
              chartConfig.options.scales.x.title.text = xLabel.value || 'X Value';
            } else {
              chartConfig.options.scales.x.type = 'linear';
              chartConfig.options.scales.x.title.text = xLabel.value || 'Index';
            }
            
            chartConfig.options.scales.y.title.text = yLabel.value || 'Y Value';
          } else if (chartType.value === 'bubble') {
            // Convert data to bubble format
            const bubbleData = [];
            for (let i = 0; i < data.length; i++) {
              if (data[i] !== null) {
                bubbleData.push({
                  x: i,
                  y: data[i],
                  r: Math.abs(data[i]) * 2 + 5
                });
              }
            }
            dataset.data = bubbleData;
            chartConfig.options.scales.x.min = 0;
            chartConfig.options.scales.x.max = Math.max(data.length - 1, 1);
          }
        });
        
        // Create new chart
        chart = new Chart(graph, chartConfig);
        
        // Hide empty state
        emptyState.classList.add('hidden');
        
        // Add animation class to chart
        graph.classList.add('chart-update');
        setTimeout(() => {
          graph.classList.remove('chart-update');
        }, 300);
        
        // Show success message
        showToast('Chart generated successfully!');
      }
      
      // Download chart
      downloadBtn.addEventListener('click', function() {
        if (!chart) {
          showToast('No chart to download');
          return;
        }
        
        const now = new Date();
        const timestamp = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}_${String(now.getHours()).padStart(2, '0')}-${String(now.getMinutes()).padStart(2, '0')}`;
        const filename = `chart_${timestamp}.png`;
        
        const link = document.createElement('a');
        link.download = filename;
        link.href = chart.toBase64Image();
        link.click();
        
        showToast(`Chart downloaded as ${filename}`);
      });
      
      // Export data
      exportDataBtn.addEventListener('click', function() {
        if (!chart) {
          showToast('No data to export');
          return;
        }
        
        // Create CSV content from chart data
        let csvContent = "data:text/csv;charset=utf-8,";
        
        // Add headers
        const datasets = chart.data.datasets;
        const labels = chart.data.labels;
        
        // Build header row
        let headerRow = "X";
        datasets.forEach(dataset => {
          headerRow += `,${dataset.label}`;
        });
        csvContent += headerRow + "\n";
        
        // Build data rows
        for (let i = 0; i < labels.length; i++) {
          let row = labels[i];
          datasets.forEach(dataset => {
            // Handle different data formats (simple values, objects with x/y, etc.)
            let value = '';
            if (Array.isArray(dataset.data)) {
              const dataPoint = dataset.data[i];
              if (dataPoint !== null && typeof dataPoint === 'object' && dataPoint.y !== undefined) {
                value = dataPoint.y;
              } else if (dataPoint !== null) {
                value = dataPoint;
              }
            }
            row += `,${value}`;
          });
          csvContent += row + "\n";
        }
        
        // Create download link
        const encodedUri = encodeURI(csvContent);
        const link = document.createElement("a");
        link.setAttribute("href", encodedUri);
        link.setAttribute("download", "chart_data.csv");
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
        
        showToast('Data exported successfully!');
      });
      
      // Fullscreen functionality
      fullscreenBtn.addEventListener('click', function() {
        fullscreenModal.classList.remove('hidden');
        fullscreenModal.classList.add('slide-in');
        
        // Create fullscreen chart
        if (fullscreenChartInstance) {
          fullscreenChartInstance.destroy();
        }
        
        fullscreenTitle.textContent = chartTitleDisplay.textContent;
        
        fullscreenChartInstance = new Chart(fullscreenChart, JSON.parse(JSON.stringify(chart.config)));
      });
      
      closeFullscreen.addEventListener('click', function() {
        fullscreenModal.classList.remove('slide-in');
        fullscreenModal.classList.add('slide-out');
        
        setTimeout(() => {
          fullscreenModal.classList.add('hidden');
          fullscreenModal.classList.remove('slide-out');
          if (fullscreenChartInstance) {
            fullscreenChartInstance.destroy();
            fullscreenChartInstance = null;
          }
        }, 300);
      });
      
      // Toast notification
      function showToast(message) {
        toastMessage.textContent = message;
        toast.classList.remove('hidden');
        toast.classList.add('slide-in');
        
        setTimeout(() => {
          toast.classList.remove('slide-in');
          toast.classList.add('slide-out');
          
          setTimeout(() => {
            toast.classList.add('hidden');
            toast.classList.remove('slide-out');
          }, 300);
        }, 3000);
      }
      
      // Initialize with empty data point if none exists
      if (multiDataPointsContainer.children.length === 0) {
        addMultiPointBtn.click();
      }
    });
  </script>
<p style="border-radius: 8px; text-align: center; font-size: 12px; color: #fff; margin-top: 16px;position: fixed; left: 8px; bottom: 8px; z-index: 10; background: rgba(0, 0, 0, 0.8); padding: 4px 8px;">Made with <img src="https://enzostvs-qwensite.hf.space/logo.svg" alt="qwensite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-qwensite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >QwenSite</a> - 🧬 <a href="https://enzostvs-qwensite.hf.space?remix=alterzick/graph-creator" style="color: #fff;text-decoration: underline;" target="_blank" >Remix</a></p></body>
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