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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>Online EPUB Reader</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdn.jsdelivr.net/npm/jszip@3.10.1/dist/jszip.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/epubjs@0.3.93/dist/epub.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .footnote-popup {
            position: absolute;
            background: white;
            border: 1px solid #ddd;
            border-radius: 4px;
            padding: 10px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            max-width: 300px;
            z-index: 100;
            display: none;
        }
        #viewer {
            height: calc(100vh - 160px);
        }
        .loading-spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            border-top: 4px solid #3498db;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .progress-bar {
            width: 100%;
            height: 4px;
            background-color: #e5e7eb;
            border-radius: 2px;
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            background-color: #3b82f6;
            transition: width 0.3s ease;
        }
    </style>
</head>
<body class="bg-gray-50">
    <div class="container mx-auto px-4 py-6">
        <header class="mb-8 text-center">
            <h1 class="text-3xl font-bold text-indigo-700">Online EPUB Reader</h1>
            <p class="text-gray-600 mt-2">Upload and read your EPUB books in the browser</p>
        </header>

        <div class="max-w-2xl mx-auto bg-white rounded-xl shadow-md overflow-hidden p-6 mb-8">
            <div class="text-center">
                <div id="upload-section" class="space-y-4">
                    <div class="flex justify-center">
                        <div class="w-24 h-24 rounded-full bg-indigo-100 flex items-center justify-center">
                            <i class="fas fa-book-open text-4xl text-indigo-500"></i>
                        </div>
                    </div>
                    <h2 class="text-xl font-semibold text-gray-800">Upload Your EPUB File</h2>
                    <p class="text-gray-500">Supported formats: .epub</p>
                    
                    <div class="mt-6">
                        <label for="epub-upload" class="cursor-pointer">
                            <div class="border-2 border-dashed border-gray-300 rounded-lg p-8 hover:border-indigo-400 transition-colors">
                                <div class="flex flex-col items-center justify-center space-y-2">
                                    <i class="fas fa-cloud-upload-alt text-3xl text-indigo-500"></i>
                                    <p class="text-gray-600">Drag & drop your EPUB file here or click to browse</p>
                                    <button id="upload-btn" class="mt-4 px-6 py-2 bg-indigo-600 text-white rounded-md hover:bg-indigo-700 transition-colors">
                                        Select EPUB File
                                    </button>
                                </div>
                            </div>
                            <input id="epub-upload" type="file" accept=".epub" class="hidden">
                        </label>
                    </div>
                </div>

                <div id="loading-section" class="hidden py-8">
                    <div class="flex flex-col items-center justify-center space-y-4">
                        <div class="loading-spinner"></div>
                        <p class="text-gray-600">Loading your book...</p>
                        <div class="w-full max-w-xs">
                            <div class="progress-bar">
                                <div id="progress-fill" class="progress-fill" style="width: 0%"></div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div id="reader-section" class="hidden bg-white rounded-xl shadow-md overflow-hidden">
            <div class="flex items-center justify-between bg-gray-100 px-4 py-3 border-b">
                <div id="book-title" class="font-semibold text-gray-700 truncate"></div>
                <div class="flex space-x-2">
                    <button id="prev-btn" class="p-2 text-gray-600 hover:text-indigo-600 hover:bg-gray-200 rounded-full">
                        <i class="fas fa-chevron-left"></i>
                    </button>
                    <button id="next-btn" class="p-2 text-gray-600 hover:text-indigo-600 hover:bg-gray-200 rounded-full">
                        <i class="fas fa-chevron-right"></i>
                    </button>
                    <button id="settings-btn" class="p-2 text-gray-600 hover:text-indigo-600 hover:bg-gray-200 rounded-full">
                        <i class="fas fa-cog"></i>
                    </button>
                </div>
            </div>
            
            <div id="viewer" class="w-full"></div>
            <div id="footnote-popup" class="footnote-popup"></div>
            
            <div class="bg-gray-100 px-4 py-3 border-t flex justify-between items-center">
                <div id="page-info" class="text-sm text-gray-500">Page: - / -</div>
                <div class="flex space-x-4">
                    <button id="toc-btn" class="text-indigo-600 hover:text-indigo-800 text-sm font-medium">
                        <i class="fas fa-list-ul mr-1"></i> Table of Contents
                    </button>
                    <button id="fullscreen-btn" class="text-indigo-600 hover:text-indigo-800 text-sm font-medium">
                        <i class="fas fa-expand mr-1"></i> Fullscreen
                    </button>
                </div>
            </div>
        </div>

        <div id="toc-modal" class="hidden fixed inset-0 bg-black bg-opacity-50 z-50 flex items-center justify-center p-4">
            <div class="bg-white rounded-lg shadow-xl max-w-md w-full max-h-[80vh] overflow-hidden">
                <div class="border-b px-6 py-4 flex justify-between items-center">
                    <h3 class="text-lg font-semibold text-gray-800">Table of Contents</h3>
                    <button id="close-toc-btn" class="text-gray-400 hover:text-gray-600">
                        <i class="fas fa-times"></i>
                    </button>
                </div>
                <div id="toc-list" class="overflow-y-auto p-4" style="max-height: calc(80vh - 80px);"></div>
            </div>
        </div>

        <div id="settings-modal" class="hidden fixed inset-0 bg-black bg-opacity-50 z-50 flex items-center justify-center p-4">
            <div class="bg-white rounded-lg shadow-xl max-w-md w-full max-h-[80vh] overflow-hidden">
                <div class="border-b px-6 py-4 flex justify-between items-center">
                    <h3 class="text-lg font-semibold text-gray-800">Reading Settings</h3>
                    <button id="close-settings-btn" class="text-gray-400 hover:text-gray-600">
                        <i class="fas fa-times"></i>
                    </button>
                </div>
                <div class="p-6 space-y-6">
                    <div>
                        <label class="block text-sm font-medium text-gray-700 mb-2">Font Size</label>
                        <div class="flex items-center space-x-4">
                            <button id="font-decrease" class="p-2 bg-gray-200 rounded-full hover:bg-gray-300">
                                <i class="fas fa-minus"></i>
                            </button>
                            <span id="font-size-display" class="text-lg">16px</span>
                            <button id="font-increase" class="p-2 bg-gray-200 rounded-full hover:bg-gray-300">
                                <i class="fas fa-plus"></i>
                            </button>
                        </div>
                    </div>
                    <div>
                        <label class="block text-sm font-medium text-gray-700 mb-2">Theme</label>
                        <div class="grid grid-cols-3 gap-2">
                            <button data-theme="light" class="p-3 border rounded-lg hover:border-indigo-400 theme-btn">
                                <div class="flex items-center space-x-2">
                                    <div class="w-4 h-4 rounded-full bg-white border border-gray-300"></div>
                                    <span>Light</span>
                                </div>
                            </button>
                            <button data-theme="sepia" class="p-3 border rounded-lg hover:border-indigo-400 theme-btn">
                                <div class="flex items-center space-x-2">
                                    <div class="w-4 h-4 rounded-full bg-amber-100"></div>
                                    <span>Sepia</span>
                                </div>
                            </button>
                            <button data-theme="dark" class="p-3 border rounded-lg hover:border-indigo-400 theme-btn">
                                <div class="flex items-center space-x-2">
                                    <div class="w-4 h-4 rounded-full bg-gray-800"></div>
                                    <span>Dark</span>
                                </div>
                            </button>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            // Elements
            const uploadSection = document.getElementById('upload-section');
            const loadingSection = document.getElementById('loading-section');
            const readerSection = document.getElementById('reader-section');
            const uploadBtn = document.getElementById('upload-btn');
            const epubUpload = document.getElementById('epub-upload');
            const progressFill = document.getElementById('progress-fill');
            const bookTitle = document.getElementById('book-title');
            const tocModal = document.getElementById('toc-modal');
            const tocList = document.getElementById('toc-list');
            const tocBtn = document.getElementById('toc-btn');
            const closeTocBtn = document.getElementById('close-toc-btn');
            const settingsModal = document.getElementById('settings-modal');
            const settingsBtn = document.getElementById('settings-btn');
            const closeSettingsBtn = document.getElementById('close-settings-btn');
            const prevBtn = document.getElementById('prev-btn');
            const nextBtn = document.getElementById('next-btn');
            const pageInfo = document.getElementById('page-info');
            const fullscreenBtn = document.getElementById('fullscreen-btn');
            const fontDecrease = document.getElementById('font-decrease');
            const fontIncrease = document.getElementById('font-increase');
            const fontSizeDisplay = document.getElementById('font-size-display');
            const themeButtons = document.querySelectorAll('.theme-btn');
            
            // EPUB.js variables
            let book;
            let rendition;
            let currentSectionIndex = 0;
            let spineItems = [];
            
            // Drag and drop functionality
            const dropArea = document.querySelector('.border-dashed');
            
            ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
                dropArea.addEventListener(eventName, preventDefaults, false);
            });
            
            function preventDefaults(e) {
                e.preventDefault();
                e.stopPropagation();
            }
            
            ['dragenter', 'dragover'].forEach(eventName => {
                dropArea.addEventListener(eventName, highlight, false);
            });
            
            ['dragleave', 'drop'].forEach(eventName => {
                dropArea.addEventListener(eventName, unhighlight, false);
            });
            
            function highlight() {
                dropArea.classList.add('border-indigo-400');
            }
            
            function unhighlight() {
                dropArea.classList.remove('border-indigo-400');
            }
            
            dropArea.addEventListener('drop', handleDrop, false);
            
            function handleDrop(e) {
                const dt = e.dataTransfer;
                const files = dt.files;
                
                if (files.length > 0 && files[0].name.endsWith('.epub')) {
                    handleFile(files[0]);
                }
            }
            
            // File upload handler
            uploadBtn.addEventListener('click', function() {
                epubUpload.click();
            });
            
            epubUpload.addEventListener('change', function(e) {
                if (e.target.files.length > 0) {
                    handleFile(e.target.files[0]);
                }
            });
            
            function handleFile(file) {
                uploadSection.classList.add('hidden');
                loadingSection.classList.remove('hidden');
                
                // Simulate progress for better UX
                let progress = 0;
                const progressInterval = setInterval(() => {
                    progress += Math.random() * 10;
                    if (progress >= 90) clearInterval(progressInterval);
                    progressFill.style.width = `${Math.min(progress, 100)}%`;
                }, 200);
                
                const reader = new FileReader();
                
                reader.onload = function(e) {
                    const content = e.target.result;
                    
                    // Initialize EPUB.js
                    book = ePub(content);
                    
                    book.loaded.metadata.then(function(meta) {
                        bookTitle.textContent = meta.title || 'Untitled Book';
                    });
                    
                    book.loaded.spine.then(function(spine) {
                        spineItems = spine.spineItems;
                    });
                    
                    book.loaded.navigation.then(function(nav) {
                        displayToc(nav.toc);
                    });
                    
                    // Initialize rendition
                    rendition = book.renderTo("viewer", {
                        width: "100%",
                        height: "100%",
                        spread: "none"
                    });
                    
                    rendition.display().then(function() {
                        clearInterval(progressInterval);
                        progressFill.style.width = '100%';
                        
                        setTimeout(() => {
                            loadingSection.classList.add('hidden');
                            readerSection.classList.remove('hidden');
                            updatePageInfo();
                        }, 500);
                    });
                    
                    // Navigation handlers
                    rendition.on("relocated", function(location) {
                        currentSectionIndex = location.start.index;
                        updatePageInfo();
                    });
                };
                
                reader.readAsArrayBuffer(file);
            }
            
            // Table of Contents
            function displayToc(toc) {
                tocList.innerHTML = '';
                
                function createTocItems(items, level = 0) {
                    items.forEach(item => {
                        const itemElement = document.createElement('div');
                        itemElement.className = `py-2 pl-${level * 4} cursor-pointer hover:text-indigo-600`;
                        itemElement.textContent = item.label;
                        
                        itemElement.addEventListener('click', function() {
                            rendition.display(item.href);
                            tocModal.classList.add('hidden');
                        });
                        
                        tocList.appendChild(itemElement);
                        
                        if (item.subitems && item.subitems.length > 0) {
                            createTocItems(item.subitems, level + 1);
                        }
                    });
                }
                
                createTocItems(toc);
            }
            
            // Navigation controls
            prevBtn.addEventListener('click', function() {
                rendition.prev();
            });
            
            nextBtn.addEventListener('click', function() {
                rendition.next();
            });
            
            tocBtn.addEventListener('click', function() {
                tocModal.classList.remove('hidden');
            });
            
            closeTocBtn.addEventListener('click', function() {
                tocModal.classList.add('hidden');
            });
            
            settingsBtn.addEventListener('click', function() {
                settingsModal.classList.remove('hidden');
            });
            
            closeSettingsBtn.addEventListener('click', function() {
                settingsModal.classList.add('hidden');
            });
            
            // Update page info
            function updatePageInfo() {
                if (spineItems.length > 0) {
                    pageInfo.textContent = `Page: ${currentSectionIndex + 1} / ${spineItems.length}`;
                }
            }
            
            // Fullscreen mode
            fullscreenBtn.addEventListener('click', function() {
                const viewer = document.getElementById('viewer');
                
                if (!document.fullscreenElement) {
                    viewer.requestFullscreen().catch(err => {
                        console.error(`Error attempting to enable fullscreen: ${err.message}`);
                    });
                    fullscreenBtn.innerHTML = '<i class="fas fa-compress mr-1"></i> Exit Fullscreen';
                } else {
                    document.exitFullscreen();
                    fullscreenBtn.innerHTML = '<i class="fas fa-expand mr-1"></i> Fullscreen';
                }
            });
            
            // Font size controls
            let fontSize = 16;
            
            fontDecrease.addEventListener('click', function() {
                if (fontSize > 12) {
                    fontSize -= 2;
                    updateFontSize();
                }
            });
            
            fontIncrease.addEventListener('click', function() {
                if (fontSize < 24) {
                    fontSize += 2;
                    updateFontSize();
                }
            });
            
            function updateFontSize() {
                if (rendition) {
                    rendition.themes.fontSize(`${fontSize}px`);
                    fontSizeDisplay.textContent = `${fontSize}px`;
                }
            }
            
            // Theme controls
            themeButtons.forEach(button => {
                button.addEventListener('click', function() {
                    const theme = this.getAttribute('data-theme');
                    applyTheme(theme);
                });
            });

            // Footnote hover functionality
            document.addEventListener('mouseover', function(e) {
                const footnoteEl = e.target.closest('a[epub:type="noteref"], .footnote, .endnote, [role="doc-noteref"]');
                if (footnoteEl) {
                    const href = footnoteEl.getAttribute('href');
                    if (href) {
                        const id = href.substring(1); // Remove #
                        const footnoteContent = document.getElementById(id);
                        if (footnoteContent) {
                            const popup = document.getElementById('footnote-popup');
                            popup.innerHTML = footnoteContent.innerHTML;
                            popup.style.display = 'block';
                            
                            // Position near the hovered element
                            const rect = footnoteEl.getBoundingClientRect();
                            popup.style.left = `${rect.left}px`;
                            popup.style.top = `${rect.bottom + window.scrollY}px`;
                        }
                    }
                }
            });

            document.addEventListener('mouseout', function(e) {
                const footnoteEl = e.target.closest('a[epub:type="noteref"], .footnote, .endnote, [role="doc-noteref"]');
                if (footnoteEl) {
                    const popup = document.getElementById('footnote-popup');
                    popup.style.display = 'none';
                }
            });
            
            function applyTheme(theme) {
                if (!rendition) return;
                
                switch (theme) {
                    case 'light':
                        rendition.themes.register('light', {
                            'body': {
                                'color': '#000000',
                                'background': '#ffffff'
                            }
                        });
                        rendition.themes.select('light');
                        break;
                    case 'sepia':
                        rendition.themes.register('sepia', {
                            'body': {
                                'color': '#5b4636',
                                'background': '#f4ecd8'
                            }
                        });
                        rendition.themes.select('sepia');
                        break;
                    case 'dark':
                        rendition.themes.register('dark', {
                            'body': {
                                'color': '#ffffff',
                                'background': '#1a1a1a'
                            }
                        });
                        rendition.themes.select('dark');
                        break;
                }
            }
        });
    </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-deepsite.hf.space/logo.svg" alt="DeepSite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-deepsite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >DeepSite</a> - 🧬 <a href="https://enzostvs-deepsite.hf.space?remix=webdevsha/epub-reader" style="color: #fff;text-decoration: underline;" target="_blank" >Remix</a></p></body>
</html>