{% extends "base.html" %}

{% block title %}Quiz - AI Study Tool{% endblock %}

{% block content %}
<div class="quiz-container">
    <div id="quizSetup" class="quiz-setup">
        <h2>📝 Start a Quiz</h2>
        <p>Select a document to generate quiz questions from:</p>
        
        <div class="document-selector">
            <select id="documentSelect" class="form-select">
                <option value="">Loading documents...</option>
            </select>
        </div>
        
        <div class="quiz-options">
            <label>Number of questions:</label>
            <input type="number" id="numQuestions" min="5" max="20" value="10" class="form-input">
        </div>
        
        <div class="quiz-options">
            <label class="checkbox-label">
                <input type="checkbox" id="useAI" checked>
                <span>Use AI for smarter questions (recommended)</span>
            </label>
            <p class="option-hint">AI analyzes the document deeply to create more relevant and challenging questions</p>
        </div>
        
        <button id="startQuizBtn" class="btn btn-primary btn-large" onclick="startQuiz()">
            Start Quiz
        </button>
    </div>
    
    <div id="quizContent" class="quiz-content" style="display: none;">
        <div class="quiz-header">
            <h2>Quiz in Progress</h2>
            <div class="quiz-progress">
                <span id="questionNumber">Question 1</span> of <span id="totalQuestions">10</span>
            </div>
        </div>
        
        <div class="question-container">
            <h3 id="questionText" class="question-text"></h3>
            <div id="optionsContainer" class="options-container">
                <!-- Options will be dynamically inserted here -->
            </div>
        </div>
        
        <div class="quiz-navigation">
            <button id="submitAnswer" class="btn btn-primary" onclick="submitAnswer()" style="display: none;">
                Submit Answer
            </button>
            <button id="nextQuestion" class="btn btn-primary" onclick="nextQuestion()" style="display: none;">
                Next Question
            </button>
            <button id="finishQuiz" class="btn btn-success" onclick="finishQuiz()" style="display: none;">
                Finish Quiz
            </button>
        </div>
    </div>
    
    <div id="quizResults" class="quiz-results" style="display: none;">
        <h2>Quiz Complete! 🎉</h2>
        <div class="results-summary">
            <div class="score-circle">
                <span id="scorePercentage" class="score-percentage">0%</span>
            </div>
            <p class="score-text">
                You answered <span id="correctCount">0</span> out of <span id="totalCount">10</span> questions correctly.
            </p>
        </div>
        
        <div class="results-breakdown" id="resultsBreakdown">
            <!-- Detailed results will be shown here -->
        </div>
        
        <div class="results-actions">
            <button class="btn btn-primary" onclick="retakeQuiz()">Retake Quiz</button>
            <button class="btn btn-secondary" onclick="newQuiz()">New Quiz</button>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
let currentQuiz = {
    questions: [],
    currentIndex: 0,
    answers: [],
    docId: null
};

// Load documents on page load
window.addEventListener('load', function() {
    loadDocuments();
});

async function loadDocuments() {
    try {
        const response = await fetch('/api/documents/list');
        const data = await response.json();
        const select = document.getElementById('documentSelect');
        
        if (data.documents && data.documents.length > 0) {
            select.innerHTML = '<option value="">Select a document...</option>' +
                data.documents.map(doc => 
                    `<option value="${doc.id}">${doc.filename}</option>`
                ).join('');
        } else {
            select.innerHTML = '<option value="">No documents available</option>';
        }
    } catch (error) {
        console.error('Error loading documents:', error);
        document.getElementById('documentSelect').innerHTML = 
            '<option value="">Error loading documents</option>';
    }
}

async function startQuiz() {
    const docSelect = document.getElementById('documentSelect');
    const numQuestions = document.getElementById('numQuestions').value;
    const useAI = document.getElementById('useAI').checked;
    
    if (!docSelect.value) {
        alert('Please select a document first.');
        return;
    }
    
    const startBtn = document.getElementById('startQuizBtn');
    startBtn.disabled = true;
    startBtn.textContent = useAI ? 'AI is analyzing document...' : 'Generating questions...';
    
    try {
        // Generate multiple choice questions with optional AI
        const url = `/api/questions/generate/document/${docSelect.value}?question_type=multiple_choice&count=${numQuestions}&use_ai=${useAI}`;
        const response = await fetch(url, {
            method: 'POST'
        });
        
        if (!response.ok) {
            throw new Error('Failed to generate questions');
        }
        
        const data = await response.json();
        
        if (!data.questions || data.questions.length === 0) {
            alert('No questions could be generated. Please try a different document.');
            return;
        }
        
        // Log the questions for debugging
        console.log('Quiz questions received:', data.questions);
        
        // Initialize quiz
        currentQuiz = {
            questions: data.questions,
            currentIndex: 0,
            answers: [],
            docId: docSelect.value,
            aiGenerated: data.ai_generated || false
        };
        
        // Update UI
        document.getElementById('quizSetup').style.display = 'none';
        document.getElementById('quizContent').style.display = 'block';
        document.getElementById('totalQuestions').textContent = data.questions.length;
        
        // Add indicator if AI was used
        if (currentQuiz.aiGenerated) {
            const header = document.querySelector('.quiz-header h2');
            header.innerHTML = 'Quiz in Progress <span style="color: #3498db; font-size: 0.8em;">(AI Generated)</span>';
        }
        
        // Display first question
        displayQuestion(0);
        
    } catch (error) {
        console.error('Error starting quiz:', error);
        alert('Failed to start quiz. Please try again.');
    } finally {
        startBtn.disabled = false;
        startBtn.textContent = 'Start Quiz';
    }
}

function displayQuestion(index) {
    const question = currentQuiz.questions[index];
    
    // Update question number
    document.getElementById('questionNumber').textContent = `Question ${index + 1}`;
    document.getElementById('questionText').textContent = question.question;
    
    // Display options
    const optionsContainer = document.getElementById('optionsContainer');
    optionsContainer.innerHTML = '';
    
    // Handle different question formats (AI vs standard)
    let options = question.options || question.choices || [];
    if (options.length === 0) {
        console.error('Question has no options:', question);
        // Create default options if none exist
        options = ['Option A', 'Option B', 'Option C', 'Option D'];
    }
    
    options.forEach((option, i) => {
        const optionDiv = document.createElement('div');
        optionDiv.className = 'option';
        optionDiv.innerHTML = `
            <input type="radio" name="answer" id="option${i}" value="${i}">
            <label for="option${i}">${option}</label>
        `;
        optionDiv.onclick = () => selectOption(i);
        optionsContainer.appendChild(optionDiv);
    });
    
    // Reset navigation buttons
    document.getElementById('submitAnswer').style.display = 'block';
    document.getElementById('nextQuestion').style.display = 'none';
    document.getElementById('finishQuiz').style.display = 'none';
    
    // Enable options if revisiting
    if (currentQuiz.answers[index] !== undefined) {
        const answered = currentQuiz.answers[index];
        if (document.querySelector(`#option${answered.selected}`)) {
            document.querySelector(`#option${answered.selected}`).checked = true;
            submitAnswer();
        }
    }
}

function selectOption(index) {
    document.querySelector(`#option${index}`).checked = true;
}

function submitAnswer() {
    const selected = document.querySelector('input[name="answer"]:checked');
    
    if (!selected) {
        alert('Please select an answer.');
        return;
    }
    
    const selectedIndex = parseInt(selected.value);
    const question = currentQuiz.questions[currentQuiz.currentIndex];
    const isCorrect = selectedIndex === question.correct_answer;
    
    // Store answer
    currentQuiz.answers[currentQuiz.currentIndex] = {
        selected: selectedIndex,
        correct: isCorrect
    };
    
    // Disable all options
    document.querySelectorAll('input[name="answer"]').forEach(input => {
        input.disabled = true;
    });
    
    // Show feedback
    const options = document.querySelectorAll('.option');
    options.forEach((option, i) => {
        if (i === question.correct_answer) {
            option.classList.add('correct');
            option.innerHTML += ' <span class="feedback-icon">✓</span>';
        } else if (i === selectedIndex && !isCorrect) {
            option.classList.add('incorrect');
            option.innerHTML += ' <span class="feedback-icon">✗</span>';
        }
    });
    
    // Update navigation
    document.getElementById('submitAnswer').style.display = 'none';
    document.getElementById('nextQuestion').style.display = 'none';
    document.getElementById('finishQuiz').style.display = 'none';
    
    if (currentQuiz.currentIndex < currentQuiz.questions.length - 1) {
        document.getElementById('nextQuestion').style.display = 'block';
    } else {
        // Last question - show finish button
        document.getElementById('finishQuiz').style.display = 'block';
    }
}

function nextQuestion() {
    currentQuiz.currentIndex++;
    displayQuestion(currentQuiz.currentIndex);
}

function finishQuiz() {
    showResults();
}

function showResults() {
    const correctCount = currentQuiz.answers.filter(a => a.correct).length;
    const totalCount = currentQuiz.questions.length;
    const percentage = Math.round((correctCount / totalCount) * 100);
    
    // Hide quiz content
    document.getElementById('quizContent').style.display = 'none';
    document.getElementById('quizResults').style.display = 'block';
    
    // Update results
    document.getElementById('scorePercentage').textContent = percentage + '%';
    document.getElementById('correctCount').textContent = correctCount;
    document.getElementById('totalCount').textContent = totalCount;
    
    // Color code the score
    const scoreCircle = document.querySelector('.score-circle');
    if (percentage >= 80) {
        scoreCircle.style.borderColor = '#27ae60';
        scoreCircle.style.color = '#27ae60';
    } else if (percentage >= 60) {
        scoreCircle.style.borderColor = '#f39c12';
        scoreCircle.style.color = '#f39c12';
    } else {
        scoreCircle.style.borderColor = '#e74c3c';
        scoreCircle.style.color = '#e74c3c';
    }
    
    // Show detailed breakdown
    const breakdown = document.getElementById('resultsBreakdown');
    breakdown.innerHTML = '<h3>Question Review:</h3>' +
        currentQuiz.questions.map((q, i) => {
            const answer = currentQuiz.answers[i];
            const options = q.options || q.choices || [];
            return `
                <div class="result-item ${answer.correct ? 'correct' : 'incorrect'}">
                    <div class="result-header">
                        <span>Question ${i + 1}: ${answer.correct ? '✓ Correct' : '✗ Incorrect'}</span>
                    </div>
                    <p class="result-question">${q.question}</p>
                    ${!answer.correct && options.length > 0 ? `
                        <p class="result-answer">Your answer: ${options[answer.selected] || 'Unknown'}</p>
                        <p class="result-correct">Correct answer: ${options[q.correct_answer] || 'Unknown'}</p>
                    ` : ''}
                </div>
            `;
        }).join('');
}

function retakeQuiz() {
    // Reset current quiz
    currentQuiz.currentIndex = 0;
    currentQuiz.answers = [];
    
    // Show quiz content
    document.getElementById('quizResults').style.display = 'none';
    document.getElementById('quizContent').style.display = 'block';
    
    // Display first question
    displayQuestion(0);
}

function newQuiz() {
    // Reset everything
    currentQuiz = {
        questions: [],
        currentIndex: 0,
        answers: [],
        docId: null
    };
    
    // Show setup
    document.getElementById('quizResults').style.display = 'none';
    document.getElementById('quizSetup').style.display = 'block';
}
</script>

<style>
.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.quiz-setup, .quiz-content, .quiz-results {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.document-selector {
    margin: 2rem 0;
}

.form-select, .form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.quiz-options {
    margin: 1.5rem 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: #2c3e50;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.option-hint {
    margin: 0.5rem 0 0 1.5rem;
    color: #7f8c8d;
    font-size: 0.9rem;
    line-height: 1.4;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #ecf0f1;
}

.quiz-progress {
    color: #7f8c8d;
}

.question-text {
    color: #2c3e50;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.options-container {
    margin-bottom: 2rem;
}

.option {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.option:hover {
    background: #e9ecef;
    border-color: #dee2e6;
}

.option input[type="radio"] {
    margin: 0;
}

.option label {
    cursor: pointer;
    margin: 0;
    flex: 1;
}

.option.correct {
    background: #d4edda;
    border-color: #27ae60;
    color: #155724;
}

.option.incorrect {
    background: #f8d7da;
    border-color: #e74c3c;
    color: #721c24;
}

.feedback-icon {
    font-weight: bold;
    margin-left: auto;
}

.quiz-navigation {
    text-align: center;
    margin-top: 2rem;
}

/* Results styles */
.results-summary {
    text-align: center;
    margin: 2rem 0;
}

.score-circle {
    width: 150px;
    height: 150px;
    border: 8px solid #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.score-percentage {
    font-size: 3rem;
    font-weight: bold;
    color: #3498db;
}

.score-text {
    font-size: 1.25rem;
    color: #2c3e50;
}

.results-breakdown {
    margin: 3rem 0;
}

.result-item {
    border-left: 4px solid #ddd;
    padding-left: 1rem;
    margin-bottom: 1.5rem;
}

.result-item.correct {
    border-color: #27ae60;
}

.result-item.incorrect {
    border-color: #e74c3c;
}

.result-header {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.result-question {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.result-answer {
    color: #e74c3c;
    margin-bottom: 0.5rem;
}

.result-correct {
    color: #27ae60;
    font-weight: 500;
}

.results-actions {
    text-align: center;
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}
</style>
{% endblock %}