{% extends "base.html" %}

{% block title %}Exam Mode - Question Table{% endblock %}

{% block head %}
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no, maximum-scale=1, viewport-fit=cover">
<style>
    :root {
        --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
        --danger-gradient: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
        --dark-bg: #0d1117;
        --card-bg: #161b22;
        --border-color: #30363d;
        --text-muted: #8b949e;
    }

    * {
        transition: all 0.3s ease;
    }

    html, body {
        height: 100%;
        height: 100dvh;
        width: 100%;
        margin: 0;
        padding: 0;
        overflow: hidden;
        background: var(--dark-bg);
    }

    /* Hide base.html navbar in exam mode */
    body > nav.navbar,
    body > .navbar,
    .modern-navbar {
        display: none !important;
    }

    /* Progress Bar */
    .progress-bar-container {
        height: 4px;
        background: var(--border-color);
        position: relative;
        overflow: hidden;
    }

    .progress-bar-fill {
        height: 100%;
        background: var(--primary-gradient);
        transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
    }

    .progress-bar-fill::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
        animation: shimmer 2s infinite;
    }

    @keyframes shimmer {
        0% { transform: translateX(-100%); }
        100% { transform: translateX(100%); }
    }

    /* Navigation Buttons */
    .nav-btn {
        background: transparent;
        border: none;
        color: #8b949e;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
    }

    .nav-btn:hover:not(:disabled) {
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .nav-btn:disabled {
        opacity: 0.3;
        cursor: not-allowed;
    }

    .nav-btn::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.6s, height 0.6s;
    }

    .nav-btn:active::before {
        width: 300px;
        height: 300px;
    }

    /* Question Container */
    .question-container {
        perspective: 1000px;
    }

    /* Question Card */
    .question-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 24px;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        transform-style: preserve-3d;
        transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s;
    }

    .question-card.slide-left {
        animation: slideLeft 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .question-card.slide-right {
        animation: slideRight 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @keyframes slideLeft {
        0% { transform: translateX(100%) scale(0.8); opacity: 0; }
        100% { transform: translateX(0) scale(1); opacity: 1; }
    }

    @keyframes slideRight {
        0% { transform: translateX(-100%) scale(0.8); opacity: 0; }
        100% { transform: translateX(0) scale(1); opacity: 1; }
    }

    /* Answer Display */
    .answer-display {
        font-size: clamp(3rem, 10vw, 8rem);
        font-weight: 800;
        background: var(--success-gradient);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        line-height: 1.2;
        position: relative;
    }

    .answer-hidden {
        filter: blur(20px);
        user-select: none;
        cursor: pointer;
    }

    .answer-reveal-btn {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 10;
    }

    /* Section Badge */
    .section-badge {
        background: var(--primary-gradient);
        padding: 0.5rem 1.5rem;
        border-radius: 50px;
        font-weight: 600;
        display: inline-block;
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    }

    /* Question Number */
    .question-number {
        font-size: clamp(1.5rem, 5vw, 3rem);
        font-weight: 700;
        color: #fff;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    /* Footer Controls */
    .footer-controls {
        background: var(--card-bg);
        border-top: 1px solid var(--border-color);
        backdrop-filter: blur(10px);
    }

    /* Control Buttons */
    .control-btn {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        color: #fff;
        border-radius: 12px;
        padding: 0.5rem 1rem;
        transition: all 0.3s;
    }

    .control-btn:hover {
        background: rgba(255, 255, 255, 0.1);
        border-color: #667eea;
        color: #fff;
        transform: translateY(-2px);
    }

    .control-btn.active {
        background: var(--primary-gradient);
        border-color: transparent;
    }

    /* Timer Display */
    .timer-display {
        font-family: 'SF Mono', 'Consolas', monospace;
        font-size: 1.5rem;
        font-weight: 600;
        color: #fff;
        background: rgba(0, 0, 0, 0.3);
        padding: 0.5rem 1rem;
        border-radius: 8px;
    }

    .timer-display.warning {
        color: #f0ad4e;
        animation: pulse 1s infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.5; }
    }

    /* Keyboard Hints */
    .kbd-hint {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        padding: 0.25rem 0.5rem;
        border-radius: 6px;
        font-family: 'SF Mono', monospace;
        font-size: 0.75rem;
    }

    /* Modal Styling */
    .modal-content.dark-modal {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: 16px;
    }

    /* Question Grid */
    .question-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
        gap: 8px;
        max-height: 400px;
        overflow-y: auto;
        padding: 1rem;
    }

    .question-grid-item {
        aspect-ratio: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--dark-bg);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        cursor: pointer;
        font-weight: 600;
        transition: all 0.2s;
    }

    .question-grid-item:hover {
        background: rgba(102, 126, 234, 0.2);
        border-color: #667eea;
        transform: scale(1.1);
    }

    .question-grid-item.current {
        background: var(--primary-gradient);
        border-color: transparent;
    }

    .question-grid-item.marked {
        border-color: #f0ad4e;
        box-shadow: 0 0 10px rgba(240, 173, 78, 0.3);
    }

    /* Settings Panel */
    .settings-panel {
        position: fixed;
        top: 0;
        right: -400px;
        width: 400px;
        max-width: 100%;
        height: 100vh;
        background: var(--card-bg);
        border-left: 1px solid var(--border-color);
        z-index: 1050;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
    }

    .settings-panel.open {
        right: 0;
    }

    .settings-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
    }

    .settings-overlay.open {
        opacity: 1;
        visibility: visible;
    }

    /* Swipe Indicator */
    .swipe-indicator {
        position: fixed;
        top: 50%;
        transform: translateY(-50%);
        font-size: 4rem;
        color: rgba(255, 255, 255, 0.3);
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.3s;
    }

    .swipe-indicator.left {
        left: 20px;
    }

    .swipe-indicator.right {
        right: 20px;
    }

    .swipe-indicator.show {
        opacity: 1;
    }

    /* Bookmark Icon */
    .bookmark-btn {
        font-size: 1.5rem;
        color: var(--text-muted);
        cursor: pointer;
        transition: all 0.3s;
    }

    .bookmark-btn:hover {
        color: #f0ad4e;
        transform: scale(1.2);
    }

    .bookmark-btn.active {
        color: #f0ad4e;
        animation: bookmarkPop 0.3s ease;
    }

    @keyframes bookmarkPop {
        0%, 100% { transform: scale(1); }
        50% { transform: scale(1.3); }
    }

    /* Fullscreen Mode */
    .fullscreen-mode .navbar,
    .fullscreen-mode .footer-controls {
        display: none !important;
    }

    .fullscreen-mode .question-container {
        height: 100vh !important;
    }

    /* Mini Progress Dots */
    .progress-dots {
        display: flex;
        gap: 4px;
        justify-content: center;
        flex-wrap: wrap;
        max-width: 400px;
        margin: 0 auto;
    }

    .progress-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--border-color);
        transition: all 0.3s;
    }

    .progress-dot.active {
        background: #667eea;
        transform: scale(1.5);
    }

    .progress-dot.visited {
        background: #38ef7d;
    }

    /* Touch Feedback */
    .touch-ripple {
        position: fixed;
        border-radius: 50%;
        background: rgba(102, 126, 234, 0.3);
        transform: scale(0);
        animation: ripple 0.6s linear;
        pointer-events: none;
    }

    @keyframes ripple {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }

    /* Completion Celebration */
    .celebration {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        pointer-events: none;
        z-index: 9999;
    }

    /* Scrollbar Styling */
    ::-webkit-scrollbar {
        width: 8px;
    }

    ::-webkit-scrollbar-track {
        background: var(--dark-bg);
    }

    ::-webkit-scrollbar-thumb {
        background: var(--border-color);
        border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
        background: #667eea;
    }

    /* Responsive */
    @media (max-width: 768px) {
        .nav-btn {
            min-width: 50px !important;
            font-size: 1.5rem !important;
        }

        .question-card {
            border-radius: 16px;
            margin: 0.5rem;
        }

        .footer-controls {
            padding: 0.5rem !important;
        }

        .control-btn span {
            display: none;
        }
    }
</style>
{% endblock %}

{% block content %}
<div class="d-flex flex-column text-light" id="examContainer" style="height: 100dvh; width: 100%; overflow: hidden; position: fixed; top: 0; left: 0;">
    <!-- Progress Bar -->
    <div class="progress-bar-container">
        <div class="progress-bar-fill" id="progressBar" style="width: 0%"></div>
    </div>

    <!-- Header -->
    <nav class="navbar navbar-dark border-bottom border-secondary py-2" style="background: var(--card-bg);">
        <div class="container-fluid">
            <span class="navbar-brand mb-0 h5 fw-bold d-flex align-items-center gap-2">
                <i class="fas fa-graduation-cap"></i>
                <span class="d-none d-sm-inline">Exam Mode</span>
            </span>
            
            <div class="d-flex gap-2 align-items-center">
                <!-- Timer -->
                <div class="timer-display d-none" id="timerDisplay">
                    <i class="fas fa-clock me-1"></i>
                    <span id="timerValue">00:00</span>
                </div>
                
                <!-- Control Buttons -->
                <button class="control-btn" onclick="toggleTimer()" title="Toggle Timer" id="timerBtn">
                    <i class="fas fa-stopwatch"></i>
                </button>
                
                <button class="control-btn" onclick="openQuestionGrid()" title="Question Grid">
                    <i class="fas fa-th"></i>
                </button>
                
                <button class="control-btn" onclick="toggleSettings()" title="Settings">
                    <i class="fas fa-cog"></i>
                </button>
                
                <button class="control-btn" onclick="toggleFullscreen()" title="Fullscreen" id="fullscreenBtn">
                    <i class="fas fa-expand"></i>
                </button>
                
                <a href="{{ url_for('qtab.qtab_list') }}" class="control-btn text-danger" title="Exit">
                    <i class="fas fa-times"></i>
                </a>
            </div>
        </div>
    </nav>

    <!-- Main Content -->
    <div class="flex-grow-1 position-relative overflow-hidden d-flex align-items-center question-container" 
         id="questionContainer" 
         tabindex="0">
        
        <!-- Previous Button -->
        <button class="nav-btn h-100 d-flex align-items-center justify-content-center" 
                style="min-width: 80px; font-size: 2.5rem;" 
                id="btnPrevLarge" 
                onclick="navigatePrev()">
            <i class="fas fa-chevron-left"></i>
        </button>
        
        <!-- Question Display -->
        <div class="flex-grow-1 h-100 d-flex align-items-center justify-content-center p-3 overflow-auto" style="overflow-y: auto;">
            <div class="text-center w-100" style="max-width: 900px;" id="questionDisplay">
                <div class="spinner-border text-primary" style="width: 3rem; height: 3rem;" role="status">
                    <span class="visually-hidden">Loading...</span>
                </div>
            </div>
        </div>
        
        <!-- Next Button -->
        <button class="nav-btn h-100 d-flex align-items-center justify-content-center" 
                style="min-width: 80px; font-size: 2.5rem;" 
                id="btnNextLarge" 
                onclick="navigateNext()">
            <i class="fas fa-chevron-right"></i>
        </button>
        
        <!-- Swipe Indicators -->
        <div class="swipe-indicator left" id="swipeLeft">
            <i class="fas fa-chevron-left"></i>
        </div>
        <div class="swipe-indicator right" id="swipeRight">
            <i class="fas fa-chevron-right"></i>
        </div>
    </div>

    <!-- Footer Controls -->
    <div class="footer-controls py-2">
        <div class="container-fluid">
            <div class="row g-2 align-items-center">
                <!-- Quick Navigation -->
                <div class="col-12 col-md-4 order-md-1 text-center text-md-start">
                    <div class="d-flex gap-2 justify-content-center justify-content-md-start flex-wrap">
                        <button class="control-btn" onclick="navigateFirst()" title="First">
                            <i class="fas fa-step-backward"></i>
                        </button>
                        <button class="control-btn" id="shuffleBtn" onclick="toggleShuffle()" title="Shuffle">
                            <i class="fas fa-random"></i>
                        </button>
                        <button class="control-btn" id="hideAnswerBtn" onclick="toggleHideAnswer()" title="Hide/Show Answers">
                            <i class="fas fa-eye"></i>
                        </button>
                        <button class="control-btn" onclick="navigateLast()" title="Last">
                            <i class="fas fa-step-forward"></i>
                        </button>
                    </div>
                </div>
                
                <!-- Position & Jump -->
                <div class="col-12 col-md-4 order-md-2 text-center">
                    <div class="d-flex align-items-center justify-content-center gap-2">
                        <div class="input-group input-group-sm" style="max-width: 150px;">
                            <input type="number" class="form-control bg-dark text-light border-secondary" 
                                   id="jumpInput" placeholder="Q#" min="1">
                            <button class="btn btn-primary" onclick="jumpToQuestionNumber()">
                                <i class="fas fa-arrow-right"></i>
                            </button>
                        </div>
                        <span class="text-muted small" id="positionIndicator">1 / 1</span>
                    </div>
                </div>
                
                <!-- Keyboard Hints -->
                <div class="col-12 col-md-4 order-md-3 text-center text-md-end">
                    <div class="d-none d-lg-block">
                        <span class="text-muted small">
                            <span class="kbd-hint">←</span> <span class="kbd-hint">→</span> Navigate
                            <span class="ms-2"><span class="kbd-hint">Space</span> Reveal</span>
                            <span class="ms-2"><span class="kbd-hint">S</span> Sections</span>
                        </span>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Settings Panel -->
<div class="settings-overlay" id="settingsOverlay" onclick="toggleSettings()"></div>
<div class="settings-panel" id="settingsPanel">
    <div class="p-4">
        <div class="d-flex justify-content-between align-items-center mb-4">
            <h5 class="mb-0"><i class="fas fa-cog me-2"></i>Settings</h5>
            <button class="btn btn-sm btn-outline-secondary" onclick="toggleSettings()">
                <i class="fas fa-times"></i>
            </button>
        </div>
        
        <div class="mb-4">
            <h6 class="text-muted mb-3">Display</h6>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingHideAnswer">
                <label class="form-check-label" for="settingHideAnswer">Hide answers by default</label>
            </div>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingShowProgress" checked>
                <label class="form-check-label" for="settingShowProgress">Show progress bar</label>
            </div>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingAnimations" checked>
                <label class="form-check-label" for="settingAnimations">Enable animations</label>
            </div>
        </div>
        
        <div class="mb-4">
            <h6 class="text-muted mb-3">Timer</h6>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingCountdown">
                <label class="form-check-label" for="settingCountdown">Countdown mode</label>
            </div>
            <div class="mb-2">
                <label class="form-label small">Countdown time (minutes)</label>
                <input type="number" class="form-control form-control-sm bg-dark text-light border-secondary" 
                       id="settingCountdownTime" value="30" min="1" max="180">
            </div>
        </div>
        
        <div class="mb-4">
            <h6 class="text-muted mb-3">Navigation</h6>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingSwipeEnabled" checked>
                <label class="form-check-label" for="settingSwipeEnabled">Enable swipe gestures</label>
            </div>
            <div class="form-check form-switch mb-2">
                <input class="form-check-input" type="checkbox" id="settingLoopNavigation">
                <label class="form-check-label" for="settingLoopNavigation">Loop navigation</label>
            </div>
        </div>
        
        <div class="mb-4">
            <h6 class="text-muted mb-3">Quick Actions</h6>
            <button class="btn btn-outline-primary w-100 mb-2" onclick="resetProgress()">
                <i class="fas fa-redo me-2"></i>Reset Progress
            </button>
            <button class="btn btn-outline-warning w-100 mb-2" onclick="clearBookmarks()">
                <i class="fas fa-bookmark me-2"></i>Clear Bookmarks
            </button>
        </div>
    </div>
</div>

<!-- Question Grid Modal -->
<div class="modal fade" id="questionGridModal" tabindex="-1">
    <div class="modal-dialog modal-dialog-centered modal-lg">
        <div class="modal-content dark-modal text-light">
            <div class="modal-header border-secondary">
                <h5 class="modal-title">
                    <i class="fas fa-th me-2"></i>Question Navigator
                </h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <!-- Section Filter -->
                <div class="mb-3" id="sectionFilterContainer">
                    <select class="form-select form-select-sm bg-dark text-light border-secondary" 
                            id="sectionFilter" onchange="filterQuestionGrid()">
                        <option value="">All Sections</option>
                    </select>
                </div>
                
                <div class="question-grid" id="questionGrid">
                    <!-- Populated dynamically -->
                </div>
                
                <div class="mt-3 d-flex gap-3 justify-content-center text-muted small">
                    <span><span class="badge" style="background: var(--primary-gradient);">&nbsp;</span> Current</span>
                    <span><span class="badge bg-success">&nbsp;</span> Visited</span>
                    <span><span class="badge" style="border: 2px solid #f0ad4e;">&nbsp;</span> Bookmarked</span>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Section Jump Modal -->
<div class="modal fade" id="sectionJumpModal" tabindex="-1">
    <div class="modal-dialog modal-dialog-centered modal-dialog-scrollable">
        <div class="modal-content dark-modal text-light">
            <div class="modal-header border-secondary">
                <h5 class="modal-title">
                    <i class="fas fa-list me-2"></i>Jump to Section
                </h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body p-0">
                <div class="list-group list-group-flush" id="sectionList">
                    <!-- Populated dynamically -->
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Celebration Canvas -->
<canvas class="celebration" id="celebrationCanvas"></canvas>

<script>
// Data
const resultData = {{ result_json | tojson }};
const allImages = {{ all_images | tojson }};

// State
let allQuestions = [];
let originalQuestions = [];
let currentQuestionIndex = 0;
let visitedQuestions = new Set();
let bookmarkedQuestions = new Set();
let isShuffled = false;
let hideAnswers = false;
let animationsEnabled = true;
let lastDirection = 'right';

// Timer State
let timerInterval = null;
let timerSeconds = 0;
let timerRunning = false;
let countdownMode = false;
let countdownSeconds = 1800; // 30 minutes

// Settings
let settings = {
    hideAnswer: false,
    showProgress: true,
    animations: true,
    swipeEnabled: true,
    loopNavigation: false,
    countdownMode: false,
    countdownTime: 30
};

// Load settings from localStorage
function loadSettings() {
    const saved = localStorage.getItem('examModeSettings');
    if (saved) {
        settings = { ...settings, ...JSON.parse(saved) };
    }
    applySettings();
}

function saveSettings() {
    localStorage.setItem('examModeSettings', JSON.stringify(settings));
}

function applySettings() {
    document.getElementById('settingHideAnswer').checked = settings.hideAnswer;
    document.getElementById('settingShowProgress').checked = settings.showProgress;
    document.getElementById('settingAnimations').checked = settings.animations;
    document.getElementById('settingSwipeEnabled').checked = settings.swipeEnabled;
    document.getElementById('settingLoopNavigation').checked = settings.loopNavigation;
    document.getElementById('settingCountdown').checked = settings.countdownMode;
    document.getElementById('settingCountdownTime').value = settings.countdownTime;
    
    hideAnswers = settings.hideAnswer;
    animationsEnabled = settings.animations;
    countdownMode = settings.countdownMode;
    countdownSeconds = settings.countdownTime * 60;
    
    document.querySelector('.progress-bar-container').style.display = settings.showProgress ? 'block' : 'none';
    updateHideAnswerBtn();
}

// Parse questions
function parseQuestions() {
    allQuestions = [];
    
    if (!resultData || resultData.status !== 'success') return;
    
    if (Array.isArray(resultData.data)) {
        resultData.data.forEach((qa, idx) => {
            allQuestions.push({
                id: idx,
                section: null,
                questionNumber: qa.question_number,
                answer: qa.answer
            });
        });
    } else {
        let idx = 0;
        Object.entries(resultData.data).forEach(([section, questions]) => {
            questions.forEach(qa => {
                allQuestions.push({
                    id: idx++,
                    section: section,
                    questionNumber: qa.question_number,
                    answer: qa.answer
                });
            });
        });
    }
    
    originalQuestions = [...allQuestions];
}

// Display question
function displayQuestion(direction = null) {
    const container = document.getElementById('questionDisplay');
    const dir = direction || lastDirection;
    
    if (allQuestions.length === 0) {
        container.innerHTML = `
            <div class="question-card p-5">
                <i class="fas fa-exclamation-triangle text-warning fa-3x mb-3"></i>
                <h4>No Questions Available</h4>
                <p class="text-muted">There are no questions to display.</p>
            </div>
        `;
        return;
    }
    
    const q = allQuestions[currentQuestionIndex];
    visitedQuestions.add(q.id);
    
    const isBookmarked = bookmarkedQuestions.has(q.id);
    const answerClass = hideAnswers ? 'answer-hidden' : '';
    
    const cardHtml = `
        <div class="question-card p-4 p-md-5 ${animationsEnabled ? (dir === 'right' ? 'slide-left' : 'slide-right') : ''}">
            <!-- Top Bar -->
            <div class="d-flex justify-content-between align-items-start mb-4">
                ${q.section ? `<span class="section-badge">${q.section}</span>` : '<span></span>'}
                <i class="fas fa-bookmark bookmark-btn ${isBookmarked ? 'active' : ''}" 
                   onclick="toggleBookmark(${q.id})" title="Bookmark"></i>
            </div>
            
            <!-- Question Number -->
            <div class="question-number mb-4">Question ${q.questionNumber}</div>
            
            <!-- Answer -->
            <div class="position-relative my-5" onclick="revealAnswer(event)">
                <div class="answer-display ${answerClass}" id="answerText">
                    ${q.answer}
                </div>
                ${hideAnswers ? `
                    <div class="answer-reveal-btn">
                        <button class="btn btn-lg btn-outline-light" onclick="revealAnswer(event)">
                            <i class="fas fa-eye me-2"></i>Tap to Reveal
                        </button>
                    </div>
                ` : ''}
            </div>
            
            <!-- Progress Indicator -->
            <div class="mt-4">
                <span class="badge bg-secondary px-3 py-2">
                    ${currentQuestionIndex + 1} of ${allQuestions.length}
                </span>
            </div>
        </div>
    `;
    
    container.innerHTML = cardHtml;
    updateUI();
    
    // Check if completed
    if (currentQuestionIndex === allQuestions.length - 1 && visitedQuestions.size === allQuestions.length) {
        setTimeout(() => celebrate(), 500);
    }
}

// Update UI elements
function updateUI() {
    // Progress bar
    const progress = ((currentQuestionIndex + 1) / allQuestions.length) * 100;
    document.getElementById('progressBar').style.width = `${progress}%`;
    
    // Position indicator
    document.getElementById('positionIndicator').textContent = 
        `${currentQuestionIndex + 1} / ${allQuestions.length}`;
    
    // Nav buttons
    const isFirst = currentQuestionIndex === 0;
    const isLast = currentQuestionIndex === allQuestions.length - 1;
    
    document.getElementById('btnPrevLarge').disabled = isFirst && !settings.loopNavigation;
    document.getElementById('btnNextLarge').disabled = isLast && !settings.loopNavigation;
    
    // Jump input
    const jumpInput = document.getElementById('jumpInput');
    if (jumpInput) {
        jumpInput.max = allQuestions.length;
    }
}

// Navigation
function navigatePrev() {
    if (currentQuestionIndex > 0) {
        currentQuestionIndex--;
        lastDirection = 'left';
        displayQuestion('left');
    } else if (settings.loopNavigation) {
        currentQuestionIndex = allQuestions.length - 1;
        lastDirection = 'left';
        displayQuestion('left');
    }
    focusContainer();
    saveProgress();
}

function navigateNext() {
    if (currentQuestionIndex < allQuestions.length - 1) {
        currentQuestionIndex++;
        lastDirection = 'right';
        displayQuestion('right');
    } else if (settings.loopNavigation) {
        currentQuestionIndex = 0;
        lastDirection = 'right';
        displayQuestion('right');
    }
    focusContainer();
    saveProgress();
}

function navigateFirst() {
    currentQuestionIndex = 0;
    lastDirection = 'left';
    displayQuestion('left');
    focusContainer();
    saveProgress();
}

function navigateLast() {
    currentQuestionIndex = allQuestions.length - 1;
    lastDirection = 'right';
    displayQuestion('right');
    focusContainer();
    saveProgress();
}

function jumpToQuestionNumber() {
    const input = document.getElementById('jumpInput');
    const qNum = parseInt(input.value);
    
    if (isNaN(qNum) || qNum < 1 || qNum > allQuestions.length) {
        input.classList.add('is-invalid');
        input.classList.add('shake');
        setTimeout(() => {
            input.classList.remove('is-invalid', 'shake');
        }, 500);
        return;
    }
    
    const dir = qNum - 1 > currentQuestionIndex ? 'right' : 'left';
    currentQuestionIndex = qNum - 1;
    lastDirection = dir;
    displayQuestion(dir);
    input.value = '';
    focusContainer();
    
    // Close modal if open
    const modal = bootstrap.Modal.getInstance(document.getElementById('questionGridModal'));
    if (modal) modal.hide();
}

function jumpToSection(sectionName) {
    const idx = allQuestions.findIndex(q => q.section === sectionName);
    if (idx !== -1) {
        const dir = idx > currentQuestionIndex ? 'right' : 'left';
        currentQuestionIndex = idx;
        lastDirection = dir;
        displayQuestion(dir);
        bootstrap.Modal.getInstance(document.getElementById('sectionJumpModal')).hide();
        focusContainer();
        saveProgress();
    }
}

function focusContainer() {
    document.getElementById('questionContainer').focus();
}

// Answer reveal
function revealAnswer(e) {
    if (e) e.stopPropagation();
    const answerText = document.getElementById('answerText');
    if (answerText && answerText.classList.contains('answer-hidden')) {
        answerText.classList.remove('answer-hidden');
        const revealBtn = document.querySelector('.answer-reveal-btn');
        if (revealBtn) revealBtn.remove();
    }
}

// Toggle hide answer mode
function toggleHideAnswer() {
    hideAnswers = !hideAnswers;
    settings.hideAnswer = hideAnswers;
    saveSettings();
    updateHideAnswerBtn();
    displayQuestion();
}

function updateHideAnswerBtn() {
    const btn = document.getElementById('hideAnswerBtn');
    const icon = btn.querySelector('i');
    if (hideAnswers) {
        btn.classList.add('active');
        icon.classList.remove('fa-eye');
        icon.classList.add('fa-eye-slash');
    } else {
        btn.classList.remove('active');
        icon.classList.remove('fa-eye-slash');
        icon.classList.add('fa-eye');
    }
}

// Shuffle
function toggleShuffle() {
    isShuffled = !isShuffled;
    const btn = document.getElementById('shuffleBtn');
    
    if (isShuffled) {
        btn.classList.add('active');
        allQuestions = [...allQuestions].sort(() => Math.random() - 0.5);
    } else {
        btn.classList.remove('active');
        allQuestions = [...originalQuestions];
    }
    
    currentQuestionIndex = 0;
    displayQuestion();
}

// Bookmarks
function toggleBookmark(id) {
    if (bookmarkedQuestions.has(id)) {
        bookmarkedQuestions.delete(id);
    } else {
        bookmarkedQuestions.add(id);
    }
    
    // Update bookmark icon
    const icon = document.querySelector('.bookmark-btn');
    if (icon) {
        icon.classList.toggle('active');
    }
    
    saveBookmarks();
}

function saveBookmarks() {
    localStorage.setItem('examBookmarks', JSON.stringify([...bookmarkedQuestions]));
}

function loadBookmarks() {
    const saved = localStorage.getItem('examBookmarks');
    if (saved) {
        bookmarkedQuestions = new Set(JSON.parse(saved));
    }
}

function clearBookmarks() {
    bookmarkedQuestions.clear();
    saveBookmarks();
    displayQuestion();
}

// Timer
function toggleTimer() {
    const timerDisplay = document.getElementById('timerDisplay');
    const timerBtn = document.getElementById('timerBtn');
    
    if (timerRunning) {
        stopTimer();
        timerBtn.classList.remove('active');
        timerDisplay.classList.add('d-none');
    } else {
        startTimer();
        timerBtn.classList.add('active');
        timerDisplay.classList.remove('d-none');
    }
}

function startTimer() {
    timerRunning = true;
    if (countdownMode) {
        timerSeconds = countdownSeconds;
    }
    
    timerInterval = setInterval(() => {
        if (countdownMode) {
            timerSeconds--;
            if (timerSeconds <= 0) {
                stopTimer();
                alert('Time is up!');
                return;
            }
            if (timerSeconds <= 60) {
                document.getElementById('timerDisplay').classList.add('warning');
            }
        } else {
            timerSeconds++;
        }
        updateTimerDisplay();
    }, 1000);
}

function stopTimer() {
    timerRunning = false;
    clearInterval(timerInterval);
}

function updateTimerDisplay() {
    const mins = Math.floor(timerSeconds / 60);
    const secs = timerSeconds % 60;
    document.getElementById('timerValue').textContent = 
        `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
}

// Fullscreen
function toggleFullscreen() {
    const container = document.getElementById('examContainer');
    const btn = document.getElementById('fullscreenBtn');
    
    if (!document.fullscreenElement) {
        container.requestFullscreen().then(() => {
            container.classList.add('fullscreen-mode');
            btn.querySelector('i').classList.replace('fa-expand', 'fa-compress');
        });
    } else {
        document.exitFullscreen().then(() => {
            container.classList.remove('fullscreen-mode');
            btn.querySelector('i').classList.replace('fa-compress', 'fa-expand');
        });
    }
}

// Settings Panel
function toggleSettings() {
    const panel = document.getElementById('settingsPanel');
    const overlay = document.getElementById('settingsOverlay');
    
    panel.classList.toggle('open');
    overlay.classList.toggle('open');
}

// Question Grid
function openQuestionGrid() {
    populateQuestionGrid();
    populateSectionFilter();
    new bootstrap.Modal(document.getElementById('questionGridModal')).show();
}

function populateQuestionGrid(sectionFilter = '') {
    const grid = document.getElementById('questionGrid');
    const filtered = sectionFilter 
        ? allQuestions.filter(q => q.section === sectionFilter)
        : allQuestions;
    
    grid.innerHTML = filtered.map((q, idx) => {
        const originalIdx = allQuestions.indexOf(q);
        const classes = [
            'question-grid-item',
            originalIdx === currentQuestionIndex ? 'current' : '',
            visitedQuestions.has(q.id) ? 'visited' : '',
            bookmarkedQuestions.has(q.id) ? 'marked' : ''
        ].filter(Boolean).join(' ');
        
        return `
            <div class="${classes}" 
                 onclick="jumpFromGrid(${originalIdx})" 
                 title="Question ${q.questionNumber}${q.section ? ' - ' + q.section : ''}">
                ${q.questionNumber}
            </div>
        `;
    }).join('');
}

function populateSectionFilter() {
    const sections = [...new Set(allQuestions.filter(q => q.section).map(q => q.section))];
    const container = document.getElementById('sectionFilterContainer');
    const select = document.getElementById('sectionFilter');
    
    if (sections.length === 0) {
        container.style.display = 'none';
        return;
    }
    
    container.style.display = 'block';
    select.innerHTML = `<option value="">All Sections</option>` + 
        sections.map(s => `<option value="${s}">${s}</option>`).join('');
}

function filterQuestionGrid() {
    const filter = document.getElementById('sectionFilter').value;
    populateQuestionGrid(filter);
}

function jumpFromGrid(idx) {
    const dir = idx > currentQuestionIndex ? 'right' : 'left';
    currentQuestionIndex = idx;
    lastDirection = dir;
    displayQuestion(dir);
    bootstrap.Modal.getInstance(document.getElementById('questionGridModal')).hide();
    focusContainer();
    saveProgress();
}

// Section Menu
function showSectionMenu() {
    const sections = [...new Set(allQuestions.filter(q => q.section).map(q => q.section))];
    
    if (sections.length === 0) {
        return;
    }
    
    const sectionList = document.getElementById('sectionList');
    sectionList.innerHTML = sections.map(section => {
        const count = allQuestions.filter(q => q.section === section).length;
        const current = allQuestions[currentQuestionIndex]?.section === section;
        
        return `
            <button type="button" class="list-group-item list-group-item-action text-light border-secondary py-3 ${current ? 'active' : ''}" 
                    style="background: ${current ? 'var(--primary-gradient)' : 'var(--card-bg)'};"
                    onclick="jumpToSection('${section.replace(/'/g, "\\'")}')">
                <div class="d-flex justify-content-between align-items-center">
                    <div>
                        <h6 class="mb-1 fw-bold">${section}</h6>
                        <small class="opacity-75">${count} question${count !== 1 ? 's' : ''}</small>
                    </div>
                    <i class="fas fa-chevron-right opacity-50"></i>
                </div>
            </button>
        `;
    }).join('');
    
    new bootstrap.Modal(document.getElementById('sectionJumpModal')).show();
}

// Reset Progress
function resetProgress() {
    visitedQuestions.clear();
    currentQuestionIndex = 0;
    timerSeconds = 0;
    updateTimerDisplay();
    displayQuestion();
    toggleSettings();
}

// Celebration
function celebrate() {
    const canvas = document.getElementById('celebrationCanvas');
    const ctx = canvas.getContext('2d');
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
    
    const particles = [];
    const colors = ['#667eea', '#764ba2', '#38ef7d', '#11998e', '#f0ad4e', '#eb3349'];
    
    for (let i = 0; i < 150; i++) {
        particles.push({
            x: Math.random() * canvas.width,
            y: canvas.height + 10,
            vx: (Math.random() - 0.5) * 10,
            vy: -(Math.random() * 15 + 5),
            size: Math.random() * 10 + 5,
            color: colors[Math.floor(Math.random() * colors.length)],
            gravity: 0.3,
            life: 1
        });
    }
    
    function animate() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        
        let alive = false;
        particles.forEach(p => {
            if (p.life > 0) {
                alive = true;
                p.x += p.vx;
                p.y += p.vy;
                p.vy += p.gravity;
                p.life -= 0.01;
                
                ctx.globalAlpha = p.life;
                ctx.fillStyle = p.color;
                ctx.beginPath();
                ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
                ctx.fill();
            }
        });
        
        if (alive) {
            requestAnimationFrame(animate);
        } else {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
        }
    }
    
    animate();
}

// Touch/Swipe Gestures
let touchStartX = 0;
let touchEndX = 0;

function initSwipeGestures() {
    const container = document.getElementById('questionContainer');
    
    container.addEventListener('touchstart', (e) => {
        if (!settings.swipeEnabled) return;
        touchStartX = e.changedTouches[0].screenX;
    }, { passive: true });
    
    container.addEventListener('touchmove', (e) => {
        if (!settings.swipeEnabled) return;
        const currentX = e.changedTouches[0].screenX;
        const diff = currentX - touchStartX;
        
        if (Math.abs(diff) > 50) {
            document.getElementById(diff > 0 ? 'swipeRight' : 'swipeLeft').classList.add('show');
            document.getElementById(diff > 0 ? 'swipeLeft' : 'swipeRight').classList.remove('show');
        }
    }, { passive: true });
    
    container.addEventListener('touchend', (e) => {
        if (!settings.swipeEnabled) return;
        
        document.getElementById('swipeLeft').classList.remove('show');
        document.getElementById('swipeRight').classList.remove('show');
        
        touchEndX = e.changedTouches[0].screenX;
        const diff = touchEndX - touchStartX;
        
        if (Math.abs(diff) > 100) {
            if (diff > 0) {
                navigatePrev();
            } else {
                navigateNext();
            }
        }
    }, { passive: true });
}

// Keyboard navigation
document.addEventListener('keydown', (e) => {
    if (e.target.tagName === 'INPUT' || e.target.tagName === 'SELECT') return;
    
    switch(e.key) {
        case 'ArrowLeft':
            e.preventDefault();
            navigatePrev();
            break;
        case 'ArrowRight':
            e.preventDefault();
            navigateNext();
            break;
        case ' ':
            e.preventDefault();
            revealAnswer();
            break;
        case 'Escape':
            if (document.getElementById('settingsPanel').classList.contains('open')) {
                toggleSettings();
            } else {
                window.location.href = '{{ url_for("qtab.qtab_list") }}';
            }
            break;
        case 's':
        case 'S':
            e.preventDefault();
            showSectionMenu();
            break;
        case 'g':
        case 'G':
            e.preventDefault();
            openQuestionGrid();
            break;
        case 'Home':
            e.preventDefault();
            navigateFirst();
            break;
        case 'End':
            e.preventDefault();
            navigateLast();
            break;
        case 'b':
        case 'B':
            e.preventDefault();
            const q = allQuestions[currentQuestionIndex];
            if (q) toggleBookmark(q.id);
            break;
        case 'f':
        case 'F':
            e.preventDefault();
            toggleFullscreen();
            break;
    }
});

// Settings change listeners
document.querySelectorAll('#settingsPanel input').forEach(input => {
    input.addEventListener('change', () => {
        settings.hideAnswer = document.getElementById('settingHideAnswer').checked;
        settings.showProgress = document.getElementById('settingShowProgress').checked;
        settings.animations = document.getElementById('settingAnimations').checked;
        settings.swipeEnabled = document.getElementById('settingSwipeEnabled').checked;
        settings.loopNavigation = document.getElementById('settingLoopNavigation').checked;
        settings.countdownMode = document.getElementById('settingCountdown').checked;
        settings.countdownTime = parseInt(document.getElementById('settingCountdownTime').value) || 30;
        
        saveSettings();
        applySettings();
        displayQuestion();
    });
});

// Jump input enter key
document.getElementById('jumpInput').addEventListener('keypress', (e) => {
    if (e.key === 'Enter') {
        e.preventDefault();
        jumpToQuestionNumber();
    }
});

// ==========================================
// PROGRESS PERSISTENCE
// ==========================================
function saveProgress() {
    const progress = {
        imageId: {{ image.id }},
        currentIndex: currentQuestionIndex,
        visited: Array.from(visitedQuestions),
        timerSeconds: timerSeconds,
        shuffled: shuffleMode,
        shuffledOrder: shuffleMode ? allQuestions.map(q => q.id) : [],
        timestamp: Date.now()
    };
    localStorage.setItem('qtab_exam_progress_{{ image.id }}', JSON.stringify(progress));
}

function loadProgress() {
    const saved = localStorage.getItem('qtab_exam_progress_{{ image.id }}');
    if (saved) {
        try {
            const progress = JSON.parse(saved);
            // Only load if less than 24 hours old
            if (Date.now() - progress.timestamp < 24 * 60 * 60 * 1000) {
                currentQuestionIndex = progress.currentIndex || 0;
                visitedQuestions = new Set(progress.visited || []);
                timerSeconds = progress.timerSeconds || 0;
                
                // Restore shuffled order if was shuffled
                if (progress.shuffled && progress.shuffledOrder && progress.shuffledOrder.length === allQuestions.length) {
                    const orderMap = new Map(allQuestions.map(q => [q.id, q]));
                    allQuestions = progress.shuffledOrder.map(id => orderMap.get(id)).filter(Boolean);
                    shuffleMode = true;
                    document.getElementById('shuffleBtn').classList.add('active');
                }
                
                updateTimerDisplay();
                return true;
            }
        } catch (e) {
            console.error('Error loading progress:', e);
        }
    }
    return false;
}

// Navigation functions now have saveProgress() built-in

// Initialize
parseQuestions();
loadSettings();
loadBookmarks();
initSwipeGestures();

// Load saved progress if exists
const progressLoaded = loadProgress();
if (progressLoaded) {
    console.log('Progress restored from last session');
}

displayQuestion();
focusContainer();

// Save progress periodically and on visibility change
setInterval(saveProgress, 30000); // Every 30 seconds
document.addEventListener('visibilitychange', () => {
    if (document.hidden) saveProgress();
});
</script>
{% endblock %}