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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>Timetable Creator</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>
        .timetable-cell {
            min-height: 80px;
            transition: all 0.2s ease;
        }
        .timetable-cell:hover {
            background-color: #f3f4f6;
        }
        .draggable-item {
            cursor: grab;
            user-select: none;
        }
        .draggable-item:active {
            cursor: grabbing;
        }
        .dropzone {
            transition: background-color 0.2s ease;
        }
        .dropzone.drag-over {
            background-color: #e5e7eb;
        }
        .modal {
            transition: opacity 0.2s ease, transform 0.2s ease;
        }
        .modal-hidden {
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }
    </style>
</head>
<body class="bg-gray-50 min-h-screen">
    <div class="container mx-auto px-4 py-8">
        <header class="mb-8">
            <h1 class="text-3xl font-bold text-indigo-700 mb-2">Timetable Creator</h1>
            <p class="text-gray-600">Drag and drop subjects to create your perfect schedule</p>
        </header>

        <div class="grid grid-cols-1 lg:grid-cols-4 gap-6">
            <!-- Subjects Panel -->
            <div class="bg-white rounded-lg shadow p-4 lg:col-span-1">
                <div class="flex justify-between items-center mb-4">
                    <h2 class="text-lg font-semibold text-gray-800">Subjects</h2>
                    <button id="addSubjectBtn" class="bg-indigo-100 text-indigo-700 p-2 rounded-full hover:bg-indigo-200 transition">
                        <i class="fas fa-plus"></i>
                    </button>
                </div>
                
                <div id="subjectsList" class="space-y-2">
                    <!-- Subjects will be added here -->
                </div>
            </div>

            <!-- Timetable -->
            <div class="bg-white rounded-lg shadow p-4 lg:col-span-3">
                <div class="flex justify-between items-center mb-4">
                    <h2 class="text-lg font-semibold text-gray-800">Weekly Schedule</h2>
                    <div class="flex space-x-2">
                        <button id="saveTimetableBtn" class="bg-green-100 text-green-700 px-3 py-1 rounded hover:bg-green-200 transition">
                            <i class="fas fa-save mr-1"></i> Save
                        </button>
                        <button id="clearTimetableBtn" class="bg-red-100 text-red-700 px-3 py-1 rounded hover:bg-red-200 transition">
                            <i class="fas fa-trash mr-1"></i> Clear
                        </button>
                    </div>
                </div>

                <div class="overflow-x-auto">
                    <table class="w-full border-collapse">
                        <thead>
                            <tr class="bg-gray-100">
                                <th class="p-2 w-24 font-medium text-gray-600">Time</th>
                                <th class="p-2 font-medium text-gray-600">Monday</th>
                                <th class="p-2 font-medium text-gray-600">Tuesday</th>
                                <th class="p-2 font-medium text-gray-600">Wednesday</th>
                                <th class="p-2 font-medium text-gray-600">Thursday</th>
                                <th class="p-2 font-medium text-gray-600">Friday</th>
                            </tr>
                        </thead>
                        <tbody id="timetableBody">
                            <!-- Timetable rows will be generated here -->
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!-- Saved Timetables Section -->
        <div class="mt-8 bg-white rounded-lg shadow p-4">
            <h2 class="text-lg font-semibold text-gray-800 mb-4">Saved Timetables</h2>
            <div id="savedTimetables" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
                <!-- Saved timetables will appear here -->
            </div>
        </div>
    </div>

    <!-- Add Subject Modal -->
    <div id="subjectModal" class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50 modal modal-hidden">
        <div class="bg-white rounded-lg shadow-xl w-full max-w-md">
            <div class="p-6">
                <h3 class="text-xl font-semibold text-gray-800 mb-4">Add New Subject</h3>
                
                <div class="mb-4">
                    <label for="subjectName" class="block text-sm font-medium text-gray-700 mb-1">Subject Name</label>
                    <input type="text" id="subjectName" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-indigo-500">
                </div>
                
                <div class="mb-4">
                    <label for="subjectColor" class="block text-sm font-medium text-gray-700 mb-1">Color</label>
                    <select id="subjectColor" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-indigo-500">
                        <option value="bg-red-100 text-red-800">Red</option>
                        <option value="bg-blue-100 text-blue-800">Blue</option>
                        <option value="bg-green-100 text-green-800">Green</option>
                        <option value="bg-yellow-100 text-yellow-800">Yellow</option>
                        <option value="bg-purple-100 text-purple-800">Purple</option>
                        <option value="bg-pink-100 text-pink-800">Pink</option>
                        <option value="bg-indigo-100 text-indigo-800">Indigo</option>
                    </select>
                </div>
                
                <div class="flex justify-end space-x-3">
                    <button id="cancelSubjectBtn" class="px-4 py-2 text-gray-600 hover:text-gray-800 transition">Cancel</button>
                    <button id="saveSubjectBtn" class="px-4 py-2 bg-indigo-600 text-white rounded-md hover:bg-indigo-700 transition">Add Subject</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Save Timetable Modal -->
    <div id="saveModal" class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50 modal modal-hidden">
        <div class="bg-white rounded-lg shadow-xl w-full max-w-md">
            <div class="p-6">
                <h3 class="text-xl font-semibold text-gray-800 mb-4">Save Timetable</h3>
                
                <div class="mb-4">
                    <label for="timetableName" class="block text-sm font-medium text-gray-700 mb-1">Timetable Name</label>
                    <input type="text" id="timetableName" class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="e.g. Fall Semester 2023">
                </div>
                
                <div class="flex justify-end space-x-3">
                    <button id="cancelSaveBtn" class="px-4 py-2 text-gray-600 hover:text-gray-800 transition">Cancel</button>
                    <button id="confirmSaveBtn" class="px-4 py-2 bg-indigo-600 text-white rounded-md hover:bg-indigo-700 transition">Save</button>
                </div>
            </div>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            // DOM Elements
            const subjectsList = document.getElementById('subjectsList');
            const timetableBody = document.getElementById('timetableBody');
            const savedTimetables = document.getElementById('savedTimetables');
            const addSubjectBtn = document.getElementById('addSubjectBtn');
            const saveTimetableBtn = document.getElementById('saveTimetableBtn');
            const clearTimetableBtn = document.getElementById('clearTimetableBtn');
            const subjectModal = document.getElementById('subjectModal');
            const saveModal = document.getElementById('saveModal');
            const cancelSubjectBtn = document.getElementById('cancelSubjectBtn');
            const saveSubjectBtn = document.getElementById('saveSubjectBtn');
            const cancelSaveBtn = document.getElementById('cancelSaveBtn');
            const confirmSaveBtn = document.getElementById('confirmSaveBtn');
            const subjectNameInput = document.getElementById('subjectName');
            const subjectColorSelect = document.getElementById('subjectColor');
            const timetableNameInput = document.getElementById('timetableName');

            // State
            let subjects = [];
            let timetable = {};
            let draggedItem = null;
            let currentCell = null;

            // Initialize timetable
            initTimetable();

            // Event Listeners
            addSubjectBtn.addEventListener('click', showSubjectModal);
            cancelSubjectBtn.addEventListener('click', hideSubjectModal);
            saveSubjectBtn.addEventListener('click', addSubject);
            saveTimetableBtn.addEventListener('click', showSaveModal);
            cancelSaveBtn.addEventListener('click', hideSaveModal);
            confirmSaveBtn.addEventListener('click', saveTimetable);
            clearTimetableBtn.addEventListener('click', clearTimetable);

            // Initialize with some sample subjects
            addSampleSubjects();

            // Functions
            function initTimetable() {
                const timeSlots = [
                    '8:00 - 9:00', '9:00 - 10:00', '10:00 - 11:00', 
                    '11:00 - 12:00', '12:00 - 13:00', '13:00 - 14:00', 
                    '14:00 - 15:00', '15:00 - 16:00', '16:00 - 17:00'
                ];

                timetableBody.innerHTML = '';

                timeSlots.forEach(time => {
                    const row = document.createElement('tr');
                    
                    // Time cell
                    const timeCell = document.createElement('td');
                    timeCell.className = 'p-2 border border-gray-200 bg-gray-50 text-center text-sm text-gray-600';
                    timeCell.textContent = time;
                    row.appendChild(timeCell);

                    // Day cells
                    for (let i = 0; i < 5; i++) {
                        const dayCell = document.createElement('td');
                        dayCell.className = 'p-1 border border-gray-200 timetable-cell dropzone';
                        dayCell.dataset.day = i;
                        dayCell.dataset.time = time;
                        
                        // Drag and drop events
                        dayCell.addEventListener('dragover', handleDragOver);
                        dayCell.addEventListener('dragleave', handleDragLeave);
                        dayCell.addEventListener('drop', handleDrop);
                        dayCell.addEventListener('dragenter', handleDragEnter);
                        
                        row.appendChild(dayCell);
                    }

                    timetableBody.appendChild(row);
                });
            }

            function addSampleSubjects() {
                const sampleSubjects = [
                    { name: 'Mathematics', color: 'bg-blue-100 text-blue-800' },
                    { name: 'Physics', color: 'bg-red-100 text-red-800' },
                    { name: 'Chemistry', color: 'bg-green-100 text-green-800' },
                    { name: 'Biology', color: 'bg-purple-100 text-purple-800' },
                    { name: 'History', color: 'bg-yellow-100 text-yellow-800' },
                    { name: 'English', color: 'bg-pink-100 text-pink-800' }
                ];

                sampleSubjects.forEach(subject => {
                    addSubjectToDOM(subject);
                    subjects.push(subject);
                });
            }

            function showSubjectModal() {
                subjectNameInput.value = '';
                subjectModal.classList.remove('modal-hidden');
            }

            function hideSubjectModal() {
                subjectModal.classList.add('modal-hidden');
            }

            function showSaveModal() {
                timetableNameInput.value = '';
                saveModal.classList.remove('modal-hidden');
            }

            function hideSaveModal() {
                saveModal.classList.add('modal-hidden');
            }

            function addSubject() {
                const name = subjectNameInput.value.trim();
                const color = subjectColorSelect.value;

                if (name) {
                    const subject = { name, color };
                    addSubjectToDOM(subject);
                    subjects.push(subject);
                    hideSubjectModal();
                }
            }

            function addSubjectToDOM(subject) {
                const subjectElement = document.createElement('div');
                subjectElement.className = `p-3 rounded-md draggable-item ${subject.color} flex justify-between items-center`;
                subjectElement.textContent = subject.name;
                subjectElement.draggable = true;
                subjectElement.dataset.subject = subject.name;
                
                // Add drag icon
                const dragIcon = document.createElement('span');
                dragIcon.className = 'text-gray-500 ml-2';
                dragIcon.innerHTML = '<i class="fas fa-grip-vertical"></i>';
                subjectElement.appendChild(dragIcon);
                
                // Drag events
                subjectElement.addEventListener('dragstart', handleDragStart);
                subjectElement.addEventListener('dragend', handleDragEnd);
                
                subjectsList.appendChild(subjectElement);
            }

            function handleDragStart(e) {
                draggedItem = e.target;
                e.target.classList.add('opacity-50');
                e.dataTransfer.setData('text/plain', e.target.dataset.subject);
            }

            function handleDragEnd(e) {
                e.target.classList.remove('opacity-50');
            }

            function handleDragOver(e) {
                e.preventDefault();
                currentCell = e.target;
                e.target.classList.add('drag-over');
            }

            function handleDragEnter(e) {
                e.preventDefault();
            }

            function handleDragLeave(e) {
                e.target.classList.remove('drag-over');
            }

            function handleDrop(e) {
                e.preventDefault();
                e.target.classList.remove('drag-over');
                
                const subjectName = e.dataTransfer.getData('text/plain');
                const subject = subjects.find(s => s.name === subjectName);
                
                if (subject && currentCell) {
                    // Clear cell first
                    currentCell.innerHTML = '';
                    
                    // Add subject to cell
                    const subjectElement = document.createElement('div');
                    subjectElement.className = `p-2 rounded ${subject.color} text-sm font-medium`;
                    subjectElement.textContent = subject.name;
                    
                    // Add remove button
                    const removeBtn = document.createElement('button');
                    removeBtn.className = 'float-right text-gray-500 hover:text-gray-700 ml-1';
                    removeBtn.innerHTML = '<i class="fas fa-times"></i>';
                    removeBtn.addEventListener('click', function() {
                        currentCell.innerHTML = '';
                    });
                    
                    subjectElement.appendChild(removeBtn);
                    currentCell.appendChild(subjectElement);
                    
                    // Save to timetable object
                    const day = currentCell.dataset.day;
                    const time = currentCell.dataset.time;
                    
                    if (!timetable[day]) timetable[day] = {};
                    timetable[day][time] = subject.name;
                }
            }

            function saveTimetable() {
                const name = timetableNameInput.value.trim();
                
                if (name) {
                    const timetableData = {
                        name,
                        data: timetable,
                        createdAt: new Date().toISOString()
                    };
                    
                    // Save to localStorage
                    let saved = JSON.parse(localStorage.getItem('timetables') || '[]');
                    saved.push(timetableData);
                    localStorage.setItem('timetables', JSON.stringify(saved));
                    
                    // Update UI
                    displaySavedTimetables();
                    hideSaveModal();
                    
                    // Show success message
                    alert('Timetable saved successfully!');
                }
            }

            function displaySavedTimetables() {
                const saved = JSON.parse(localStorage.getItem('timetables') || '[]');
                savedTimetables.innerHTML = '';
                
                if (saved.length === 0) {
                    savedTimetables.innerHTML = '<p class="text-gray-500">No saved timetables yet.</p>';
                    return;
                }
                
                saved.forEach((timetable, index) => {
                    const card = document.createElement('div');
                    card.className = 'bg-white border border-gray-200 rounded-lg p-4 hover:shadow-md transition';
                    
                    const name = document.createElement('h3');
                    name.className = 'font-medium text-lg text-gray-800 mb-2';
                    name.textContent = timetable.name;
                    
                    const date = document.createElement('p');
                    date.className = 'text-sm text-gray-500 mb-3';
                    date.textContent = new Date(timetable.createdAt).toLocaleString();
                    
                    const actions = document.createElement('div');
                    actions.className = 'flex justify-between';
                    
                    const loadBtn = document.createElement('button');
                    loadBtn.className = 'bg-indigo-100 text-indigo-700 px-3 py-1 rounded text-sm hover:bg-indigo-200 transition';
                    loadBtn.innerHTML = '<i class="fas fa-upload mr-1"></i> Load';
                    loadBtn.addEventListener('click', () => loadTimetable(index));
                    
                    const deleteBtn = document.createElement('button');
                    deleteBtn.className = 'bg-red-100 text-red-700 px-3 py-1 rounded text-sm hover:bg-red-200 transition';
                    deleteBtn.innerHTML = '<i class="fas fa-trash mr-1"></i> Delete';
                    deleteBtn.addEventListener('click', () => deleteTimetable(index));
                    
                    actions.appendChild(loadBtn);
                    actions.appendChild(deleteBtn);
                    
                    card.appendChild(name);
                    card.appendChild(date);
                    card.appendChild(actions);
                    
                    savedTimetables.appendChild(card);
                });
            }

            function loadTimetable(index) {
                const saved = JSON.parse(localStorage.getItem('timetables') || '[]');
                if (saved[index]) {
                    // Clear current timetable
                    clearTimetable();
                    
                    // Load the saved timetable
                    const loadedTimetable = saved[index].data;
                    timetable = loadedTimetable;
                    
                    // Update the UI
                    for (const day in loadedTimetable) {
                        for (const time in loadedTimetable[day]) {
                            const subjectName = loadedTimetable[day][time];
                            const subject = subjects.find(s => s.name === subjectName);
                            
                            if (subject) {
                                const cells = document.querySelectorAll(`[data-day="${day}"][data-time="${time}"]`);
                                if (cells.length > 0) {
                                    const cell = cells[0];
                                    cell.innerHTML = '';
                                    
                                    const subjectElement = document.createElement('div');
                                    subjectElement.className = `p-2 rounded ${subject.color} text-sm font-medium`;
                                    subjectElement.textContent = subject.name;
                                    
                                    // Add remove button
                                    const removeBtn = document.createElement('button');
                                    removeBtn.className = 'float-right text-gray-500 hover:text-gray-700 ml-1';
                                    removeBtn.innerHTML = '<i class="fas fa-times"></i>';
                                    removeBtn.addEventListener('click', function() {
                                        cell.innerHTML = '';
                                        delete timetable[day][time];
                                    });
                                    
                                    subjectElement.appendChild(removeBtn);
                                    cell.appendChild(subjectElement);
                                }
                            }
                        }
                    }
                    
                    alert('Timetable loaded successfully!');
                }
            }

            function deleteTimetable(index) {
                if (confirm('Are you sure you want to delete this timetable?')) {
                    const saved = JSON.parse(localStorage.getItem('timetables') || '[]');
                    saved.splice(index, 1);
                    localStorage.setItem('timetables', JSON.stringify(saved));
                    displaySavedTimetables();
                }
            }

            function clearTimetable() {
                if (confirm('Are you sure you want to clear the current timetable?')) {
                    // Clear UI
                    const cells = document.querySelectorAll('.timetable-cell');
                    cells.forEach(cell => {
                        cell.innerHTML = '';
                    });
                    
                    // Clear data
                    timetable = {};
                }
            }

            // Initial display of saved timetables
            displaySavedTimetables();
        });
    </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=theharby/timetable-project" style="color: #fff;text-decoration: underline;" target="_blank" >Remix</a></p></body>
</html>