// Analyzer page functionality
document.addEventListener('DOMContentLoaded', function() {
    initUpload();
    initAnalysis();
    initResults();
    initCreateChallengeModal();
    
    // Check if we should load a sample case
    const urlParams = new URLSearchParams(window.location.search);
    if (urlParams.get('sample') === 'true') {
        loadSampleCase();
    }
});

// Upload functionality
function initUpload() {
    const uploadZone = document.getElementById('uploadZone');
    const fileInput = document.getElementById('fileInput');
    const browseButton = document.getElementById('browseButton');
    const filePreview = document.getElementById('filePreview');
    const analyzeBtn = document.getElementById('analyzeBtn');
    const addMoreFilesBtn = document.getElementById('addMoreFiles');
    const clearAllFilesBtn = document.getElementById('clearAllFiles');
    const previewList = document.getElementById('previewList');
    const fileCount = document.getElementById('fileCount');

    // Store selected files
    let selectedFiles = [];

    // Click to upload
    uploadZone.addEventListener('click', () => {
        fileInput.click();
    });

    // Browse button
    if (browseButton) {
        browseButton.addEventListener('click', (e) => {
            e.stopPropagation();
            fileInput.click();
        });
    }

    // Add more files button
    addMoreFilesBtn.addEventListener('click', () => {
        fileInput.click();
    });

    // Clear all files button
    clearAllFilesBtn.addEventListener('click', () => {
        clearAllFiles();
    });

    // File input change (auto-start analysis)
    fileInput.addEventListener('change', (e) => {
        handleFileSelect(e);
        if (getSelectedFiles().length > 0) {
            startAnalysis();
        }
    });

    // Drag and drop
    uploadZone.addEventListener('dragover', (e) => {
        e.preventDefault();
        uploadZone.classList.add('drag-over');
    });

    uploadZone.addEventListener('dragleave', (e) => {
        e.preventDefault();
        uploadZone.classList.remove('drag-over');
    });

    uploadZone.addEventListener('drop', (e) => {
        e.preventDefault();
        uploadZone.classList.remove('drag-over');
        
        const files = e.dataTransfer.files;
        if (files.length > 0) {
            handleFileSelect({ target: { files } });
        }
    });

    // Analyze button
    analyzeBtn.addEventListener('click', startAnalysis);

    function handleFileSelect(e) {
        const files = Array.from(e.target.files);
        if (files.length === 0) return;

        // Validate each file
        const validFiles = [];
        const validTypes = ['image/jpeg', 'image/jpg', 'image/png', 'image/tiff'];
        
        files.forEach(file => {
            // Validate file type
            if (!validTypes.includes(file.type)) {
                window.oncoConnect.showToast(`Invalid file type: ${file.name}. Please upload JPG, PNG, or TIFF files.`, 'error');
                return;
            }

            // Validate file size (max 50MB)
            if (file.size > 50 * 1024 * 1024) {
                window.oncoConnect.showToast(`File too large: ${file.name}. Maximum size is 50MB.`, 'error');
                return;
            }

            validFiles.push(file);
        });

        if (validFiles.length === 0) return;

        // Add valid files to selected files
        selectedFiles = [...selectedFiles, ...validFiles];
        
        // Update UI
        updateFilePreview();
        updateAnalyzeButton();
        
        // Clear file input
        fileInput.value = '';
    }

    function updateFilePreview() {
        if (selectedFiles.length === 0) {
            filePreview.style.display = 'none';
            return;
        }

        filePreview.style.display = 'block';
        
        // Update file count
        fileCount.textContent = `${selectedFiles.length} file${selectedFiles.length > 1 ? 's' : ''}`;
        
        // Clear and rebuild preview list
        previewList.innerHTML = '';
        
        selectedFiles.forEach((file, index) => {
            const previewItem = createFilePreviewItem(file, index);
            previewList.appendChild(previewItem);
        });
    }

    function createFilePreviewItem(file, index) {
        const item = document.createElement('div');
        item.className = 'preview-item';
        item.innerHTML = `
            <div class="preview-icon">
                <svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <rect x="3" y="3" width="18" height="18" rx="2" ry="2" stroke="currentColor" stroke-width="2"/>
                    <circle cx="8.5" cy="8.5" r="1.5" stroke="currentColor" stroke-width="2"/>
                    <path d="M21 15L16 10L5 21" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                </svg>
            </div>
            <div class="preview-details">
                <div class="file-name">${file.name}</div>
                <div class="file-meta">
                    <span class="file-size">${window.oncoConnect.formatFileSize(file.size)}</span>
                    <span class="file-status">Ready to analyze</span>
                </div>
            </div>
            <button class="remove-file" onclick="removeFile(${index})" aria-label="Remove ${file.name}">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <line x1="18" y1="6" x2="6" y2="18" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                    <line x1="6" y1="6" x2="18" y2="18" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                </svg>
            </button>
        `;
        return item;
    }

    function removeFile(index) {
        selectedFiles.splice(index, 1);
        updateFilePreview();
        updateAnalyzeButton();
    }

    function clearAllFiles() {
        selectedFiles = [];
        updateFilePreview();
        updateAnalyzeButton();
    }

    function updateAnalyzeButton() {
        const analyzeBtn = document.getElementById('analyzeBtn');
        analyzeBtn.disabled = selectedFiles.length === 0;
        
        // Update button text based on file count
        const btnText = analyzeBtn.querySelector('.btn-text');
        if (selectedFiles.length === 0) {
            btnText.textContent = 'Analyze Images';
        } else if (selectedFiles.length === 1) {
            btnText.textContent = 'Analyze Image';
        } else {
            btnText.textContent = `Analyze ${selectedFiles.length} Images`;
        }
    }

    // Make functions globally accessible
    window.removeFile = removeFile;
    window.clearAllFiles = clearAllFiles;
    window.getSelectedFiles = () => selectedFiles;
}

// Analysis functionality
function initAnalysis() {
    // Already initialized in initUpload
}

function startAnalysis() {
    const selectedFiles = window.getSelectedFiles();
    if (!selectedFiles || selectedFiles.length === 0) {
        window.oncoConnect.showToast('Please select at least one image to analyze', 'error');
        return;
    }

    const uploadSection = document.getElementById('uploadSection');
    const loadingSection = document.getElementById('loadingSection');
    const resultsSection = document.getElementById('resultsSection');

    // Hide upload, show loading
    uploadSection.style.display = 'none';
    loadingSection.style.display = 'block';
    resultsSection.style.display = 'none';

    // Show toast with file count
    const fileCount = selectedFiles.length;
    const message = fileCount === 1 ? 'Analysis started...' : `Analysis started for ${fileCount} images...`;
    window.oncoConnect.showToast(message, 'info');

    // Simulate analysis steps with progress bar
    const steps = ['step1', 'step2', 'step3', 'step4'];
    const stepTexts = [
        'Starting analysis...',
        `Processing ${fileCount} image${fileCount > 1 ? 's' : ''}...`,
        'Running AI classification...',
        'Finding clinical trials...'
    ];
    let currentStep = 0;
    const progressFill = document.getElementById('progressFill');
    const progressText = document.getElementById('progressText');

    const progressInterval = setInterval(() => {
        if (currentStep > 0) {
            // Mark previous step as completed
            const prevStep = document.getElementById(steps[currentStep - 1]);
            prevStep.classList.remove('active');
            prevStep.classList.add('completed');
        }
        
        if (currentStep < steps.length) {
            // Activate current step
            const currentStepEl = document.getElementById(steps[currentStep]);
            currentStepEl.classList.add('active');
            
            // Update progress bar
            const progress = ((currentStep + 1) / steps.length) * 100;
            progressFill.style.width = progress + '%';
            progressText.textContent = stepTexts[currentStep];
            
            currentStep++;
        } else {
            clearInterval(progressInterval);
            // Complete the progress bar
            progressFill.style.width = '100%';
            progressText.textContent = 'Analysis complete!';
            
            // Show results after a short delay
            setTimeout(() => {
                showResults();
            }, 1000);
        }
    }, 1200);
}

function showResults() {
    const loadingSection = document.getElementById('loadingSection');
    const resultsSection = document.getElementById('resultsSection');
    const selectedFiles = window.getSelectedFiles();

    loadingSection.style.display = 'none';
    resultsSection.style.display = 'block';

    // Load sample results
    loadResultsData();
    
    // Setup image selector if multiple images
    setupImageSelector(selectedFiles);
    
    // Scroll to results
    resultsSection.scrollIntoView({ behavior: 'smooth' });
}

function setupImageSelector(files) {
    const imageSelector = document.getElementById('imageSelector');
    const imageSelect = document.getElementById('imageSelect');
    
    if (files.length > 1) {
        // Show selector and populate options
        imageSelector.style.display = 'block';
        imageSelect.innerHTML = '';
        
        files.forEach((file, index) => {
            const option = document.createElement('option');
            option.value = index;
            option.textContent = file.name;
            imageSelect.appendChild(option);
        });
        
        // Add change listener
        imageSelect.addEventListener('change', (e) => {
            const selectedIndex = parseInt(e.target.value);
            switchToImage(selectedIndex, files[selectedIndex]);
        });
        
        // Initialize with first image
        switchToImage(0, files[0]);
    } else {
        // Hide selector for single image
        imageSelector.style.display = 'none';
        if (files.length === 1) {
            switchToImage(0, files[0]);
        }
    }
}

function switchToImage(index, file) {
    // Update image info
    document.getElementById('imageFileName').textContent = file.name;
    document.getElementById('imageResolution').textContent = '2048×2048'; // Placeholder
    document.getElementById('analyzedTime').textContent = '2 minutes ago'; // Placeholder
    
    // Update image source (placeholder for now)
    const img = document.getElementById('analyzedImage');
    img.src = URL.createObjectURL(file);
    img.alt = `Analyzed pathology image: ${file.name}`;
    
    // Reinitialize image viewer
    initImageViewer();
}

function loadSampleCase() {
    // Auto-load a sample case for demo with multiple images
    const mockFiles = [
        {
            name: 'sample_breast_wsi_1.jpg',
            size: 2.4 * 1024 * 1024,
            type: 'image/jpeg'
        },
        {
            name: 'sample_breast_wsi_2.jpg',
            size: 1.8 * 1024 * 1024,
            type: 'image/jpeg'
        }
    ];
    
    // Set selected files
    window.getSelectedFiles = () => mockFiles;
    
    // Update UI
    updateFilePreview();
    updateAnalyzeButton();
    
    // Auto-start analysis after a delay
    setTimeout(() => {
        startAnalysis();
    }, 1000);
    
    function updateFilePreview() {
        const filePreview = document.getElementById('filePreview');
        const previewList = document.getElementById('previewList');
        const fileCount = document.getElementById('fileCount');
        
        filePreview.style.display = 'block';
        fileCount.textContent = `${mockFiles.length} files`;
        
        previewList.innerHTML = '';
        mockFiles.forEach((file, index) => {
            const previewItem = createFilePreviewItem(file, index);
            previewList.appendChild(previewItem);
        });
    }
    
    function updateAnalyzeButton() {
        const analyzeBtn = document.getElementById('analyzeBtn');
        analyzeBtn.disabled = false;
        
        const btnText = analyzeBtn.querySelector('.btn-text');
        btnText.textContent = `Analyze ${mockFiles.length} Images`;
    }
    
    function createFilePreviewItem(file, index) {
        const item = document.createElement('div');
        item.className = 'preview-item';
        item.innerHTML = `
            <div class="preview-icon">
                <svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <rect x="3" y="3" width="18" height="18" rx="2" ry="2" stroke="currentColor" stroke-width="2"/>
                    <circle cx="8.5" cy="8.5" r="1.5" stroke="currentColor" stroke-width="2"/>
                    <path d="M21 15L16 10L5 21" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                </svg>
            </div>
            <div class="preview-details">
                <div class="file-name">${file.name}</div>
                <div class="file-meta">
                    <span class="file-size">${window.oncoConnect.formatFileSize(file.size)}</span>
                    <span class="file-status">Ready to analyze</span>
                </div>
            </div>
            <button class="remove-file" onclick="removeFile(${index})" aria-label="Remove ${file.name}">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
                    <line x1="18" y1="6" x2="6" y2="18" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                    <line x1="6" y1="6" x2="18" y2="18" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
                </svg>
            </button>
        `;
        return item;
    }
}

// Results functionality
function initResults() {
    // Save case button
    document.getElementById('saveCase').addEventListener('click', () => {
        requireAuth(saveCase);
    });
    
    // Create challenge button
    document.getElementById('createChallenge').addEventListener('click', () => {
        requireAuth(() => {
            window.oncoConnect.openModal('createChallengeModal');
        });
    });
    
    // Analyze another button
    document.getElementById('analyzeAnother').addEventListener('click', resetAnalyzer);
    
    // Heatmap controls
    initHeatmapControls();
    
    // Trial filters
    initTrialFilters();

    // Export trials
    const exportBtn = document.getElementById('exportTrials');
    if (exportBtn) exportBtn.addEventListener('click', exportTrials);
}

function loadResultsData() {
    // Load analyzed image - use uploaded file if available
    const analyzedImage = document.getElementById('analyzedImage');
    const uploadZone = document.getElementById('uploadZone');
    
    if (uploadZone.selectedFile) {
        // Use the actual uploaded file
        const reader = new FileReader();
        reader.onload = function(e) {
            analyzedImage.src = e.target.result;
        };
        reader.readAsDataURL(uploadZone.selectedFile);
        
        // Update image info
        document.getElementById('imageFileName').textContent = uploadZone.selectedFile.name;
        document.getElementById('imageResolution').textContent = '2048×2048'; // Mock resolution
    } else {
        // Use placeholder for demo
        analyzedImage.src = createPlaceholderImage(400, 400, '#f8fafc', '🔬 Pathology Image');
        document.getElementById('imageFileName').textContent = 'sample_breast_wsi.jpg';
        document.getElementById('imageResolution').textContent = '2048×2048';
    }
    
    // Update analyzed time
    document.getElementById('analyzedTime').textContent = 'Just now';
    
    // Create heatmap overlay
    createHeatmapOverlay();
    
    // Set diagnosis results
    document.getElementById('cancerStatus').textContent = 'Yes';
    document.getElementById('confidenceValue').textContent = '94.2%';
    document.getElementById('diagnosisExplanation').textContent = 
        'Analysis indicates invasive ductal carcinoma with well-defined tumor boundaries. High cellular density and irregular nuclear morphology support malignant classification.';
    
    // Set chemo response
    document.getElementById('chemoResponse').textContent = 'Likely Responsive';
    document.getElementById('chemoExplanation').textContent = 
        'Tumor characteristics suggest good response to standard chemotherapy protocols. High proliferation markers and hormone receptor status indicate favorable treatment outcomes.';

    // Update risk assessment demo
    updateRiskAssessment(87);
    
    // Load clinical trials
    loadClinicalTrials();
    
    // Initialize image viewer controls
    initImageViewer();
}

function updateRiskAssessment(score) {
    const riskScoreEl = document.getElementById('riskScore');
    const riskBadgeEl = document.getElementById('riskBadge');
    const riskCategoryEl = document.getElementById('riskCategory');
    if (!riskScoreEl || !riskBadgeEl || !riskCategoryEl) return;

    riskScoreEl.textContent = String(score);
    let riskLevel, riskClass;
    if (score >= 70) { riskLevel = 'HIGH RISK'; riskClass = 'high-risk'; }
    else if (score >= 40) { riskLevel = 'MEDIUM RISK'; riskClass = 'medium-risk'; }
    else { riskLevel = 'LOW RISK'; riskClass = 'low-risk'; }

    riskBadgeEl.textContent = riskLevel;
    riskBadgeEl.className = 'card-badge ' + riskClass;
    riskCategoryEl.textContent = riskLevel;
}

function createPlaceholderImage(width, height, color, text) {
    const canvas = document.createElement('canvas');
    canvas.width = width;
    canvas.height = height;
    
    const ctx = canvas.getContext('2d');
    ctx.fillStyle = color;
    ctx.fillRect(0, 0, width, height);
    
    // Add some pattern to simulate pathology image
    ctx.strokeStyle = '#e2e8f0';
    ctx.lineWidth = 1;
    
    // Create a grid pattern
    for (let i = 0; i < width; i += 20) {
        for (let j = 0; j < height; j += 20) {
            if (Math.random() > 0.7) {
                ctx.fillStyle = '#e2e8f0';
                ctx.fillRect(i, j, 15, 15);
            }
        }
    }
    
    // Add text
    ctx.fillStyle = '#9ca3af';
    ctx.font = '20px sans-serif';
    ctx.textAlign = 'center';
    ctx.fillText(text, width/2, height/2);
    
    return canvas.toDataURL();
}

function createHeatmapOverlay() {
    const canvas = document.getElementById('heatmapOverlay');
    const ctx = canvas.getContext('2d');
    
    canvas.width = 400;
    canvas.height = 400;
    
    // Create random heatmap pattern
    const gradient = ctx.createRadialGradient(200, 200, 0, 200, 200, 150);
    gradient.addColorStop(0, 'rgba(255, 0, 0, 0.8)');
    gradient.addColorStop(0.5, 'rgba(255, 255, 0, 0.6)');
    gradient.addColorStop(1, 'rgba(255, 0, 0, 0)');
    
    ctx.fillStyle = gradient;
    ctx.fillRect(0, 0, 400, 400);
    
    // Add some random hot spots
    for (let i = 0; i < 5; i++) {
        const x = Math.random() * 400;
        const y = Math.random() * 400;
        const radius = Math.random() * 30 + 20;
        
        const spotGradient = ctx.createRadialGradient(x, y, 0, x, y, radius);
        spotGradient.addColorStop(0, 'rgba(255, 0, 0, 0.9)');
        spotGradient.addColorStop(1, 'rgba(255, 0, 0, 0)');
        
        ctx.fillStyle = spotGradient;
        ctx.beginPath();
        ctx.arc(x, y, radius, 0, 2 * Math.PI);
        ctx.fill();
    }
}

function initImageViewer() {
    const zoomInBtn = document.getElementById('zoomIn');
    const zoomOutBtn = document.getElementById('zoomOut');
    const fitScreenBtn = document.getElementById('fitScreen');
    const downloadOverlayBtn = document.getElementById('downloadOverlay');
    const analyzedImage = document.getElementById('analyzedImage');
    
    let currentZoom = 1;
    const minZoom = 0.5;
    const maxZoom = 3;
    const zoomStep = 0.2;
    
    zoomInBtn.addEventListener('click', () => {
        currentZoom = Math.min(currentZoom + zoomStep, maxZoom);
        updateImageZoom();
    });
    
    zoomOutBtn.addEventListener('click', () => {
        currentZoom = Math.max(currentZoom - zoomStep, minZoom);
        updateImageZoom();
    });
    
    fitScreenBtn.addEventListener('click', () => {
        currentZoom = 1;
        updateImageZoom();
    });
    
    downloadOverlayBtn.addEventListener('click', () => {
        downloadHeatmap();
    });
    
    function updateImageZoom() {
        analyzedImage.style.transform = `scale(${currentZoom})`;
        analyzedImage.style.transformOrigin = 'center';
    }
    
    function downloadHeatmap() {
        const canvas = document.getElementById('heatmapOverlay');
        const link = document.createElement('a');
        link.download = 'heatmap-overlay.png';
        link.href = canvas.toDataURL();
        link.click();
        window.oncoConnect.showToast('Heatmap downloaded successfully!', 'success');
    }
}

function initHeatmapControls() {
    const heatmapToggle = document.getElementById('heatmapToggle');
    const opacitySlider = document.getElementById('opacitySlider');
    const opacityValue = document.getElementById('opacityValue');
    const heatmapOverlay = document.getElementById('heatmapOverlay');
    
    // Initialize heatmap visibility
    updateHeatmapVisibility();
    
    heatmapToggle.addEventListener('change', () => {
        updateHeatmapVisibility();
    });
    
    opacitySlider.addEventListener('input', () => {
        const opacity = opacitySlider.value / 100;
        heatmapOverlay.style.opacity = opacity;
        opacityValue.textContent = opacitySlider.value + '%';
    });
}

function updateHeatmapVisibility() {
    const heatmapToggle = document.getElementById('heatmapToggle');
    const heatmapOverlay = document.getElementById('heatmapOverlay');
    const analyzedImage = document.getElementById('analyzedImage');
    
    if (heatmapToggle.checked) {
        // Show both image and heatmap overlay
        analyzedImage.style.display = 'block';
        heatmapOverlay.style.display = 'block';
    } else {
        // Show only the uploaded image
        analyzedImage.style.display = 'block';
        heatmapOverlay.style.display = 'none';
    }
}

function initTrialFilters() {
    const filterChips = document.querySelectorAll('.filter-chip');
    filterChips.forEach(chip => {
        chip.addEventListener('click', () => {
            const group = chip.parentElement;
            
            // Remove active from siblings
            group.querySelectorAll('.filter-chip').forEach(sibling => {
                sibling.classList.remove('active');
            });
            
            // Add active to clicked chip
            chip.classList.add('active');
            
            // Filter trials
            filterTrials();
        });
    });
}

function filterTrials() {
    const activePhase = document.querySelector('.filter-chip[data-phase].active')?.dataset.phase || 'all';
    const activeStatus = document.querySelector('.filter-chip[data-status].active')?.dataset.status || 'all';
    const activeDistance = document.querySelector('.filter-chip[data-distance].active')?.dataset.distance || 'all';
    const activeBiomarker = document.querySelector('.filter-chip[data-biomarker].active')?.dataset.biomarker || 'all';
    
    const trialCards = document.querySelectorAll('.trial-card');
    
    trialCards.forEach(card => {
        const phase = card.dataset.phase;
        const status = card.dataset.status;
        const distance = card.dataset.distance || 'remote';
        const biomarkers = (card.dataset.biomarkers || '').split(',');

        const phaseMatch = activePhase === 'all' || phase === activePhase;
        const statusMatch = activeStatus === 'all' || status === activeStatus;
        const distanceMatch = activeDistance === 'all' || distance === activeDistance;
        const biomarkerMatch = activeBiomarker === 'all' || biomarkers.includes(activeBiomarker);
        
        card.style.display = (phaseMatch && statusMatch && distanceMatch && biomarkerMatch) ? 'block' : 'none';
    });
}

function loadClinicalTrials() {
    const trialsList = document.getElementById('trialsList');
    const trials = window.oncoConnect.getClinicalTrials();
    
    trialsList.innerHTML = trials.map(trial => `
        <div class="trial-card"
             data-phase="${trial.phase.split(' ')[1]}"
             data-status="${trial.status.toLowerCase()}"
             data-distance="${trial.distance || 'remote'}"
             data-biomarkers="${(trial.biomarkers || []).join(',')}">
            <div class="trial-header">
                <h3 class="trial-title">${trial.title}</h3>
                <div class="trial-badges">
                    <span class="trial-badge phase">${trial.phase}</span>
                    <span class="trial-badge status ${trial.status.toLowerCase()}">${trial.status}</span>
                </div>
            </div>
            <div class="trial-description">${trial.description}</div>
            <div class="trial-details">
                <div class="trial-detail">
                    <span class="detail-label">Inclusion:</span>
                    <span class="detail-value">${trial.inclusion}</span>
                </div>
                <div class="trial-detail">
                    <span class="detail-label">Site:</span>
                    <span class="detail-value">${trial.location}</span>
                </div>
                <div class="trial-detail">
                    <span class="detail-label">Contact:</span>
                    <span class="detail-value">${trial.contact}</span>
                </div>
            </div>
        </div>
    `).join('');
}

function saveCase() {
    const caseData = {
        id: window.oncoConnect.generateId(),
        fileName: document.getElementById('fileName').textContent,
        diagnosis: document.getElementById('cancerStatus').textContent,
        confidence: document.getElementById('confidenceValue').textContent,
        timestamp: new Date().toISOString(),
        chemoResponse: document.getElementById('chemoResponse').textContent
    };
    
    // Save to localStorage
    const savedCases = window.oncoConnect.getSavedData('savedCases') || [];
    savedCases.push(caseData);
    window.oncoConnect.saveData('savedCases', savedCases);
    
    window.oncoConnect.showToast('Case saved successfully!');
}

function resetAnalyzer() {
    document.getElementById('uploadSection').style.display = 'block';
    document.getElementById('loadingSection').style.display = 'none';
    document.getElementById('resultsSection').style.display = 'none';
    
    // Clear file input
    document.getElementById('fileInput').value = '';
    document.getElementById('filePreview').style.display = 'none';
    document.getElementById('analyzeBtn').disabled = true;
    
    // Scroll to top
    window.scrollTo({ top: 0, behavior: 'smooth' });
}

// Create Challenge Modal functionality
function initCreateChallengeModal() {
    const modal = document.getElementById('createChallengeModal');
    const form = document.getElementById('challengeForm');
    const closeBtn = document.getElementById('closeChallengeModal');
    const cancelBtn = document.getElementById('cancelChallenge');
    
    closeBtn.addEventListener('click', () => {
        window.oncoConnect.closeModal(modal);
    });
    
    cancelBtn.addEventListener('click', () => {
        window.oncoConnect.closeModal(modal);
    });
    
    form.addEventListener('submit', (e) => {
        e.preventDefault();
        createChallenge();
    });
}

function createChallenge() {
    const title = document.getElementById('challengeTitle').value;
    const description = document.getElementById('challengeDescription').value;
    const difficulty = document.getElementById('challengeDifficulty').value;
    
    const challengeData = {
        id: window.oncoConnect.generateId(),
        title,
        description,
        difficulty,
        solved: 0,
        enrolled: true,
        createdBy: 'user',
        timestamp: new Date().toISOString()
    };
    
    // Add to challenges
    const challenges = window.oncoConnect.getSavedData('challenges') || [];
    challenges.push(challengeData);
    window.oncoConnect.saveData('challenges', challenges);
    
    // Close modal and show success
    window.oncoConnect.closeModal('createChallengeModal');
    window.oncoConnect.showToast('Challenge created successfully!');
    
    // Reset form
    document.getElementById('challengeForm').reset();
}