Public Quizzes - Quiz Gallery


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                Explore <span class="gradient-text">Public Quizzes</span>
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                            <option value="easy" >Easy 🟢</option>
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                         alt="Bangla Grammar" 
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                    <!-- Title -->
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                        Bangla Grammar
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                        Bangla Grammar
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                            <div class="text-lg font-bold text-white">13</div>
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                            <div class="text-lg font-bold text-white">28%</div>
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                            <div class="text-lg font-bold text-white">8</div>
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    @keyframes blob {
        0%, 100% { transform: translate(0px, 0px) scale(1); }
        33% { transform: translate(30px, -50px) scale(1.1); }
        66% { transform: translate(-20px, 20px) scale(0.9); }
    }
    
    .animate-blob {
        animation: blob 7s infinite;
    }
    
    .animation-delay-2000 {
        animation-delay: 2s;
    }
    
    .animation-delay-4000 {
        animation-delay: 4s;
    }
</style>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const categorySelect = document.getElementById('category-select');
    const courseSelect = document.getElementById('course-select');
    const chapterSelect = document.getElementById('chapter-select');
    const difficultySelect = document.getElementById('difficulty-select');
    const searchInput = document.getElementById('search-input');
    const gridContainer = document.getElementById('quiz-grid-container');
    const loader = document.getElementById('loading-indicator');

    // --- 1. Cascading Dropdown Logic ---

    // When Category Changes
    categorySelect.addEventListener('change', function() {
        const catId = this.value;
        
        // Reset Child Dropdowns
        resetSelect(courseSelect, 'Select Category First');
        resetSelect(chapterSelect, 'Select Course First');

        if (catId) {
            // Fetch courses for this category
            fetchOptions('course', catId, courseSelect, 'All Courses');
        }
        
        fetchQuizzes();
    });

    // When Course Changes
    courseSelect.addEventListener('change', function() {
        const courseId = this.value;
        
        // Reset Chapter
        resetSelect(chapterSelect, 'Select Course First');

        if (courseId) {
            // Fetch chapters for this course
            fetchOptions('chapter', courseId, chapterSelect, 'All Chapters');
        }

        fetchQuizzes();
    });

    // Other Filters
    chapterSelect.addEventListener('change', fetchQuizzes);
    difficultySelect.addEventListener('change', fetchQuizzes);
    
    let timeout = null;
    searchInput.addEventListener('keyup', function() {
        clearTimeout(timeout);
        timeout = setTimeout(fetchQuizzes, 500);
    });

    // --- Helper Functions ---

    function resetSelect(element, placeholder) {
        element.innerHTML = `<option value="">${placeholder}</option>`;
        element.disabled = true;
        element.classList.add('opacity-50', 'cursor-not-allowed');
    }

    function fetchOptions(type, parentId, targetElement, defaultText) {
        // Build URL
        const url = `/dashboard/api/filter-options/?type=${type}&parent_id=${parentId}`;
        
        fetch(url)
        .then(response => response.json())
        .then(data => {
            // Enable the select box
            targetElement.disabled = false;
            targetElement.classList.remove('opacity-50', 'cursor-not-allowed');
            
            // Clear and add Default Option
            targetElement.innerHTML = `<option value="">${defaultText}</option>`;
            
            // Append new options
            data.options.forEach(item => {
                const option = document.createElement('option');
                option.value = item.id; // This uses the ID (number)
                option.textContent = item.title;
                targetElement.appendChild(option);
            });
        })
        .catch(error => console.error('Error loading options:', error));
    }

    function fetchQuizzes() {
        loader.classList.remove('hidden');
        gridContainer.style.opacity = '0.5';

        const params = new URLSearchParams();
        if(categorySelect.value) params.append('category', categorySelect.value);
        if(courseSelect.value) params.append('course', courseSelect.value);
        if(chapterSelect.value) params.append('chapter', chapterSelect.value);
        if(difficultySelect.value) params.append('difficulty', difficultySelect.value);
        if(searchInput.value) params.append('search', searchInput.value);

        const url = `${window.location.pathname}?${params.toString()}`;

        fetch(url, {
            headers: { 'X-Requested-With': 'XMLHttpRequest' }
        })
        .then(response => response.json())
        .then(data => {
            gridContainer.innerHTML = data.html;
            document.getElementById('total-quizzes-badge').textContent = data.total;
            gridContainer.style.opacity = '1';
            loader.classList.add('hidden');
            window.history.pushState({}, '', url);
        })
        .catch(error => {
            console.error('Error:', error);
            gridContainer.style.opacity = '1';
            loader.classList.add('hidden');
        });
    }
});
</script>