{% extends 'base.html' %}
{% block head %}
<title>Take a Photo with Geolocation</title>
<link rel="manifest" href="{{ url_for('static', filename='manifest.json') }}">
<style>
    body, html {
        margin: 0;
        padding: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
    }
    #camera-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }
    #video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    #canvas {
        display: none;
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    #file-fallback {
        display: none;
        position: fixed;
        bottom: 100px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 100;
        background: rgba(255, 255, 255, 0.8);
        padding: 10px;
        border-radius: 10px;
        color: black;
    }
    #location-status {
        position: fixed;
        top: 10px;
        right: 10px;
        background: rgba(0, 0, 0, 0.7);
        color: white;
        padding: 5px 10px;
        border-radius: 5px;
        z-index: 100;
    }
</style>
{% endblock %}

{% block content %}
<div id="camera-container">
    <video id="video" autoplay playsinline></video>
    <canvas id="canvas"></canvas>
</div>

<div id="location-status">Esperando ubicación...</div>

<div style="position: absolute; bottom: 0; width: 100%; display: flex; flex-direction: column; padding: 10px; box-sizing: border-box;">
    <button id="capture-btn" class="control-button" style="margin: 10px; right:20%"><i class="fa fas fa-camera"></i></button>
    <div style="display: flex; justify-content: space-between; width: 100%; box-sizing: border-box;">
        <button id="retake-btn" class="control-button" style="display: none; margin: 10px 5px 10px 10px; flex: 1; left:20%; background-color: rgba(231, 9, 9, 0.671);color:white; left:20%"><i class="fas fa-redo"></i></button>
        <button id="send-btn" class="control-button" style="display: none; margin: 10px 10px 10px 5px; flex: 1; background-color: rgba(49, 182, 28, 0.6);color:white; right: 20%;" disabled><i class="fas fa-paper-plane"></i></button>
    </div>
</div>

<form id="camera-form" action="{{ url_for('camera') }}" method="POST" enctype="multipart/form-data" style="display:none;">
    <input type="hidden" name="latitude" id="latitude" value="">
    <input type="hidden" name="longitude" id="longitude" value="">
    <input type="hidden" name="has_image" id="has_image" value="false">
    
    <div id="file-fallback">
        <label for="photo">Toma o selecciona una foto:</label>
        <input type="file" name="photo" id="photo" accept="image/*" capture="environment" required>
        <button type="submit">Subir</button>
    </div>
</form>

<script>
    // Get DOM elements
    const video = document.getElementById('video');
    const canvas = document.getElementById('canvas');
    const captureBtn = document.getElementById('capture-btn');
    const retakeBtn = document.getElementById('retake-btn');
    const sendBtn = document.getElementById('send-btn');
    const form = document.getElementById('camera-form');
    const fallbackInput = document.getElementById('file-fallback');
    const hasImageInput = document.getElementById('has_image');
    const locationStatus = document.getElementById('location-status');
    
    // Location tracking variables
    let hasLocation = false;
    let watchId = null;
    
    // Set up camera stream
    async function setupCamera() {
        try {
            const stream = await navigator.mediaDevices.getUserMedia({
                video: { 
                    facingMode: 'environment',
                    width: { ideal: window.innerWidth },
                    height: { ideal: window.innerHeight }
                },
                audio: false
            });
            video.srcObject = stream;
        } catch (err) {
            console.error('Error accessing camera:', err);
            fallbackInput.style.display = 'block';
        }
    }

    // Initialize camera if supported
    if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
        setupCamera();
    } else {
        console.error('getUserMedia not supported');
        fallbackInput.style.display = 'block';
    }
    
    // Check if we can enable the send button
    function updateSendButtonState() {
        if (hasImageInput.value === 'true' && hasLocation) {
            sendBtn.disabled = false;
            sendBtn.style.opacity = '1';
        } else {
            sendBtn.disabled = true;
            sendBtn.style.opacity = '0.5';
        }
    }

    // Capture photo from video feed
    captureBtn.addEventListener('click', function() {
        const context = canvas.getContext('2d');
        canvas.width = video.videoWidth;
        canvas.height = video.videoHeight;
        context.drawImage(video, 0, 0, canvas.width, canvas.height);
        
        // Stop camera stream
        video.srcObject.getTracks().forEach(track => track.stop());
        video.style.display = 'none';
        canvas.style.display = 'block';
        
        // Update controls
        captureBtn.style.display = 'none';
        retakeBtn.style.display = 'inline-block';
        sendBtn.style.display = 'inline-block';
        
        // Mark that we have an image
        hasImageInput.value = 'true';
        
        // Check if we can enable send button
        updateSendButtonState();
    });

    // Retake photo
    retakeBtn.addEventListener('click', function() {
        canvas.style.display = 'none';
        video.style.display = 'block';
        captureBtn.style.display = 'flex';
        retakeBtn.style.display = 'none';
        sendBtn.style.display = 'none';
        hasImageInput.value = 'false';
        setupCamera();
    });
    
    // Send photo
    sendBtn.addEventListener('click', function() {
        if (hasImageInput.value === 'true' && hasLocation) {
            // Convert canvas to blob and append to FormData
            canvas.toBlob(function(blob) {
                const formData = new FormData(form);
                formData.delete('photo'); // Remove any file input value
                // Generate a filename with timestamp and random element
                const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
                const randomId = Math.floor(Math.random() * 10000);
                const filename = `photo-${timestamp}-${randomId}.jpg`;
                
                // Add the photo blob with the dynamic filename
                formData.append('photo', blob, filename);
                
                // Submit form data via fetch
                fetch(form.action, {
                    method: 'POST',
                    body: formData
                }).then(response => {
                    if (response.redirected) {
                        window.location.href = response.url;
                    } else if(response.ok) {
                        console.log('Success:', response);
                        window.location.href = '{{ url_for('dashboard') }}';
                    }
                }).catch(error => console.error('Error:', error));
            }, 'image/jpeg', 0.9);
        } else if (!hasLocation) {
            alert('Esperando ubicación GPS. Por favor espera.');
        }
    });

    // Request Geolocation Permission and Set Form Fields
    if ('geolocation' in navigator) {
        locationStatus.textContent = 'Obteniendo ubicación...';
        locationStatus.style.backgroundColor = 'rgba(255, 165, 0, 0.7)'; // Orange
        
        // Start watching position for more accurate results
        watchId = navigator.geolocation.watchPosition(
            (position) => {
                document.getElementById('latitude').value = position.coords.latitude;
                document.getElementById('longitude').value = position.coords.longitude;
                hasLocation = true;
                locationStatus.textContent = 'Ubicación: ✓';
                locationStatus.style.backgroundColor = 'rgba(0, 128, 0, 0.7)'; // Green
                updateSendButtonState();
                
                // Once we get a good reading, we can stop watching
                if (position.coords.accuracy < 100) { // If accuracy is under 100 meters
                    navigator.geolocation.clearWatch(watchId);
                }
            },
            (error) => {
                console.error('Error getting location:', error);
                locationStatus.textContent = 'Error de ubicación';
                locationStatus.style.backgroundColor = 'rgba(255, 0, 0, 0.7)'; // Red
                
                // Try getting location once more with different options
                navigator.geolocation.getCurrentPosition(
                    (position) => {
                        document.getElementById('latitude').value = position.coords.latitude;
                        document.getElementById('longitude').value = position.coords.longitude;
                        hasLocation = true;
                        locationStatus.textContent = 'Ubicación: ✓';
                        locationStatus.style.backgroundColor = 'rgba(0, 128, 0, 0.7)'; // Green
                        updateSendButtonState();
                    },
                    (error) => {
                        console.error('Final error getting location:', error);
                        locationStatus.textContent = 'Error de ubicación';
                    },
                    { maximumAge: 60000, timeout: 10000 }
                );
            },
            {
                enableHighAccuracy: true,
                timeout: 10000
            }
        );
    } else {
        console.error('Geolocation not supported in this browser.');
        locationStatus.textContent = 'GPS no soportado';
        locationStatus.style.backgroundColor = 'rgba(255, 0, 0, 0.7)'; // Red
    }
</script>
{% endblock %}