{% extends "base.html" %}

{% block title %}Capture - NextSnap{% endblock %}

{% block content %}
<div class="container">
    <div class="capture-section">
        <p class="upload-path">
            Uploading to: <strong><span id="current-path">/</span></strong>
            <a href="/browser" class="change-link">Change</a>
        </p>

        <button class="btn btn-primary btn-capture" id="capture-btn">
            📷 Take Photo
        </button>

        <input
            type="file"
            id="camera-input"
            accept="image/*"
            capture="environment"
            style="display: none;"
        >

        <!-- Session counter shown during continuous capture -->
        <div class="capture-session-bar" id="capture-session-bar" style="display:none">
            <span id="session-count">0</span> photos this session
        </div>
    </div>

    <div class="recent-photos" id="recent-photos">
        <h3>Recent Photos</h3>
        <div class="photo-thumbnails" id="photo-thumbnails">
            <p class="empty-state">No photos captured yet</p>
        </div>
    </div>

    <!-- Capture toast -->
    <div class="capture-toast" id="capture-toast"></div>
</div>
{% endblock %}

{% block extra_css %}
<style>
.capture-section {
    text-align: center;
    margin: 2rem 0;
}

.upload-path {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.upload-path strong {
    color: var(--text-primary);
}

.change-link {
    color: var(--accent);
    margin-left: 0.5rem;
    text-decoration: none;
}

.change-link:hover {
    text-decoration: underline;
}

.btn-capture {
    font-size: 1.25rem;
    padding: 1.5rem;
    margin: 1rem 0;
}

.btn-capture:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.capture-session-bar {
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    color: var(--accent);
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-block;
}

.capture-toast {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    z-index: 9998;
    display: none;
    white-space: nowrap;
    background: rgba(40, 167, 69, 0.9);
    color: #fff;
    pointer-events: none;
}

.recent-photos {
    margin-top: 3rem;
    padding-bottom: 2rem;
}

.recent-photos h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.photo-thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 0.5rem;
}

.photo-thumbnails .empty-state {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 1rem;
    font-size: 0.9rem;
}

.thumbnail {
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail .status-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
}

.thumbnail .status-badge.pending {
    background: var(--warning);
}

.thumbnail .status-badge.uploading {
    background: var(--accent);
    animation: pulse 1s infinite;
}

.thumbnail .status-badge.verified {
    background: var(--success);
}
</style>
{% endblock %}

{% block extra_js %}
<script src="{{ url_for('static', filename='lib/dexie.min.js') }}"></script>
<script src="{{ url_for('static', filename='js/storage.js') }}"></script>
<script src="{{ url_for('static', filename='js/sync.js') }}"></script>
<script src="{{ url_for('static', filename='js/auth.js') }}"></script>
<script>
const currentUsername = '{{ username }}';

function updateUploadPath() {
    const savedPath = localStorage.getItem('nextsnap_upload_path') || '/';
    document.getElementById('current-path').textContent = savedPath;
}
updateUploadPath();

let storageReady = false;
Storage.init().then(() => {
    storageReady = true;
    SyncEngine.init(currentUsername);
    loadRecentPhotos();
}).catch(err => console.error('Storage init failed:', err));

const captureBtn = document.getElementById('capture-btn');
const cameraInput = document.getElementById('camera-input');

// Continuous capture state
let sessionCount = 0;
let continuousCapture = false;
let processingPhoto = false;

captureBtn.addEventListener('click', function() {
    sessionCount = 0;
    updateSessionCounter();
    cameraInput.click();
});

cameraInput.addEventListener('change', async function(e) {
    const file = e.target.files[0];
    if (!file) {
        // User cancelled the camera — stop continuous capture
        continuousCapture = false;
        if (sessionCount > 0) {
            showCaptureToast(sessionCount + ' photo' + (sessionCount !== 1 ? 's' : '') + ' captured');
        }
        return;
    }

    processingPhoto = true;
    captureBtn.disabled = true;
    captureBtn.textContent = '⏳ Processing...';

    try {
        const jpegBlob = await convertToJPEG(file);

        const now = new Date();
        const timestamp = now.getFullYear() +
            String(now.getMonth() + 1).padStart(2, '0') +
            String(now.getDate()).padStart(2, '0') + '_' +
            String(now.getHours()).padStart(2, '0') +
            String(now.getMinutes()).padStart(2, '0') +
            String(now.getSeconds()).padStart(2, '0');
        const filename = currentUsername + '_' + timestamp + '.jpg';
        const targetPath = localStorage.getItem('nextsnap_upload_path') || '/';

        if (storageReady) {
            await Storage.savePhoto({
                username: currentUsername,
                timestamp: Date.now(),
                filename: filename,
                targetPath: targetPath,
                blob: jpegBlob,
                status: 'pending'
            });

            if (navigator.onLine && typeof SyncEngine !== 'undefined') {
                SyncEngine.triggerSync();
            }

            loadRecentPhotos();
        }

        sessionCount++;
        continuousCapture = true;
        updateSessionCounter();
        showCaptureToast('Photo saved');

        captureBtn.disabled = false;
        captureBtn.textContent = '📷 Take Photo';

    } catch (error) {
        console.error('Error:', error);
        captureBtn.textContent = '❌ Error';
        continuousCapture = false;
        setTimeout(() => {
            captureBtn.disabled = false;
            captureBtn.textContent = '📷 Take Photo';
        }, 2000);
        alert('Failed: ' + error.message);
    }

    processingPhoto = false;
    e.target.value = '';

    // Re-open camera automatically for next photo
    if (continuousCapture) {
        setTimeout(() => {
            cameraInput.click();
        }, 300);
    }
});

function updateSessionCounter() {
    const bar = document.getElementById('capture-session-bar');
    const countEl = document.getElementById('session-count');
    if (sessionCount > 0) {
        countEl.textContent = sessionCount;
        bar.style.display = 'inline-block';
    } else {
        bar.style.display = 'none';
    }
}

function showCaptureToast(msg) {
    const toast = document.getElementById('capture-toast');
    toast.textContent = '✓ ' + msg;
    toast.style.display = 'block';
    setTimeout(() => { toast.style.display = 'none'; }, 1500);
}

const MAX_UPLOAD_BYTES = 10 * 1024 * 1024; // 10MB

function convertToJPEG(file) {
    return new Promise((resolve, reject) => {
        const reader = new FileReader();
        reader.onload = (e) => {
            const img = new Image();
            img.onload = () => {
                let quality = 0.92;
                let scale = 1.0;

                const attempt = () => {
                    const canvas = document.createElement('canvas');
                    canvas.width = Math.round(img.width * scale);
                    canvas.height = Math.round(img.height * scale);
                    const ctx = canvas.getContext('2d');
                    ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
                    canvas.toBlob((blob) => {
                        if (!blob) {
                            reject(new Error('Failed to convert'));
                            return;
                        }
                        if (blob.size <= MAX_UPLOAD_BYTES || quality <= 0.3) {
                            console.log('Photo: ' + (blob.size / 1024 / 1024).toFixed(1) + 'MB, ' + canvas.width + 'x' + canvas.height + ', q=' + quality.toFixed(2));
                            resolve(blob);
                        } else {
                            console.log('Photo too large (' + (blob.size / 1024 / 1024).toFixed(1) + 'MB), reducing...');
                            if (quality > 0.5) {
                                quality -= 0.1;
                            } else {
                                scale *= 0.8;
                                quality = 0.7;
                            }
                            attempt();
                        }
                    }, 'image/jpeg', quality);
                };

                attempt();
            };
            img.onerror = () => reject(new Error('Failed to load'));
            img.src = e.target.result;
        };
        reader.onerror = () => reject(new Error('Failed to read'));
        reader.readAsDataURL(file);
    });
}

async function loadRecentPhotos() {
    if (!storageReady) return;

    const container = document.getElementById('photo-thumbnails');
    const photos = await Storage.getRecentPhotos(currentUsername, 5);

    if (photos.length === 0) {
        container.innerHTML = '<p class="empty-state">No photos captured yet</p>';
        return;
    }

    container.innerHTML = '';
    for (const photo of photos) {
        const url = URL.createObjectURL(photo.blob);
        const statusClass = photo.status === 'verified' ? 'verified' :
                           photo.status === 'uploading' ? 'uploading' : 'pending';

        const div = document.createElement('div');
        div.className = 'thumbnail';
        div.innerHTML = '<img src="' + url + '"><span class="status-badge ' + statusClass + '"></span>';
        container.appendChild(div);
    }
}

console.log('Capture page loaded');

// Debug panel
setTimeout(() => {
    const debugDiv = document.createElement('div');
    debugDiv.id = 'debug-panel';
    debugDiv.style.cssText = 'position:fixed;bottom:80px;right:10px;z-index:9999;background:black;color:lime;padding:10px;border-radius:5px;font-family:monospace;font-size:10px;max-width:300px;';

    const status = [];
    status.push('Storage: ' + (typeof Storage !== 'undefined' ? 'OK' : 'FAIL'));
    status.push('SyncEngine: ' + (typeof SyncEngine !== 'undefined' ? 'OK' : 'FAIL'));
    status.push('Dexie: ' + (typeof Dexie !== 'undefined' ? 'OK' : 'FAIL'));

    debugDiv.innerHTML = '<div style="margin-bottom:5px;">' + status.join('<br>') + '</div>' +
        '<button onclick="manualSync()" style="background:lime;color:black;border:none;padding:10px;border-radius:5px;cursor:pointer;font-weight:bold;width:100%;">FORCE SYNC</button>' +
        '<div id="sync-status" style="margin-top:5px;color:yellow;"></div>';
    document.body.appendChild(debugDiv);
}, 2000);

window.manualSync = function() {
    const statusDiv = document.getElementById('sync-status');
    statusDiv.textContent = 'Checking...';

    if (typeof SyncEngine === 'undefined') {
        statusDiv.textContent = 'ERROR: SyncEngine not loaded!';
        return;
    }

    statusDiv.textContent = 'Triggering sync...';
    try {
        SyncEngine.triggerSync();
        statusDiv.textContent = 'Sync triggered!';
    } catch (e) {
        statusDiv.textContent = 'ERROR: ' + e.message;
    }
};
</script>
{% endblock %}