// Global configuration
const CONFIG = {
    DEFAULT_LAT: parseFloat(document.querySelector('meta[name="default-lat"]')?.content) || 53.5461,
    DEFAULT_LNG: parseFloat(document.querySelector('meta[name="default-lng"]')?.content) || -113.4938,
    DEFAULT_ZOOM: parseInt(document.querySelector('meta[name="default-zoom"]')?.content) || 11,
    REFRESH_INTERVAL: 30000, // 30 seconds
    MAX_ZOOM: 19,
    MIN_ZOOM: 2
};

// Application state
let map = null;
let markers = [];
let userLocationMarker = null;
let isAddingLocation = false;
let refreshInterval = null;
let currentEditingLocation = null;
let currentUser = null; // Add current user state

// Initialize application when DOM is loaded
document.addEventListener('DOMContentLoaded', () => {
    initializeMap();
    checkAuthentication(); // Add authentication check
    loadLocations();
    setupEventListeners();
    checkConfiguration();
    
    // Set up auto-refresh
    refreshInterval = setInterval(loadLocations, CONFIG.REFRESH_INTERVAL);
    
    // Add event delegation for dynamically created edit buttons
    document.addEventListener('click', function(e) {
        if (e.target.classList.contains('edit-location-btn')) {
            const locationId = e.target.getAttribute('data-location-id');
            editLocation(locationId);
        }
    });
});

// Initialize Leaflet map
function initializeMap() {
    // Create map instance
    map = L.map('map', {
        center: [CONFIG.DEFAULT_LAT, CONFIG.DEFAULT_LNG],
        zoom: CONFIG.DEFAULT_ZOOM,
        zoomControl: true,
        attributionControl: true
    });
    
    // Add OpenStreetMap tiles
    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
        maxZoom: CONFIG.MAX_ZOOM,
        minZoom: CONFIG.MIN_ZOOM
    }).addTo(map);
    
    // Add scale control
    L.control.scale({
        position: 'bottomleft',
        metric: true,
        imperial: false
    }).addTo(map);
    
    // Hide loading overlay
    document.getElementById('loading').classList.add('hidden');
}

// Set up event listeners
function setupEventListeners() {
    // Geolocation button
    document.getElementById('geolocate-btn').addEventListener('click', handleGeolocation);
    
    // Add location button
    document.getElementById('add-location-btn').addEventListener('click', toggleAddLocation);
    
    // Refresh button
    document.getElementById('refresh-btn').addEventListener('click', () => {
        showStatus('Refreshing locations...', 'info');
        loadLocations();
    });
    
    // Fullscreen button
    document.getElementById('fullscreen-btn').addEventListener('click', toggleFullscreen);
    
    // Form submission
    document.getElementById('location-form').addEventListener('submit', handleLocationSubmit);
    
    // Edit form submission
    document.getElementById('edit-location-form').addEventListener('submit', handleEditLocationSubmit);
    
    // Map click handler for adding locations
    map.on('click', handleMapClick);
    
    // Set up geo field synchronization
    setupGeoFieldSync();
    
    // Add event listeners for buttons that were using inline onclick
    document.getElementById('close-edit-footer-btn').addEventListener('click', closeEditFooter);
    document.getElementById('lookup-address-edit-btn').addEventListener('click', lookupAddressForEdit);
    document.getElementById('delete-location-btn').addEventListener('click', deleteLocation);
    document.getElementById('close-modal-btn').addEventListener('click', closeModal);
    document.getElementById('lookup-address-add-btn').addEventListener('click', lookupAddressForAdd);
    document.getElementById('cancel-modal-btn').addEventListener('click', closeModal);
}

// Helper function to get color based on support level
function getSupportColor(supportLevel) {
    const level = parseInt(supportLevel);
    switch(level) {
        case 1: return '#27ae60'; // Green - Strong support
        case 2: return '#f1c40f'; // Yellow - Moderate support
        case 3: return '#e67e22'; // Orange - Low support
        case 4: return '#e74c3c'; // Red - No support
        default: return '#95a5a6'; // Grey - Unknown/null
    }
}

// Helper function to get support level text
function getSupportLevelText(level) {
    const levelNum = parseInt(level);
    switch(levelNum) {
        case 1: return '1 - Strong Support';
        case 2: return '2 - Moderate Support';
        case 3: return '3 - Low Support';
        case 4: return '4 - No Support';
        default: return 'Not Specified';
    }
}

// Set up geo field synchronization
function setupGeoFieldSync() {
    const latInput = document.getElementById('location-lat');
    const lngInput = document.getElementById('location-lng');
    const geoLocationInput = document.getElementById('geo-location');
    
    // Validate geo-location format
    function validateGeoLocation(value) {
        if (!value) return false;
        
        // Check both formats
        const patterns = [
            /^-?\d+\.?\d*\s*,\s*-?\d+\.?\d*$/,  // comma-separated
            /^-?\d+\.?\d*\s*;\s*-?\d+\.?\d*$/   // semicolon-separated
        ];
        
        return patterns.some(pattern => pattern.test(value));
    }
    
    // When lat/lng change, update geo-location
    function updateGeoLocation() {
        const lat = parseFloat(latInput.value);
        const lng = parseFloat(lngInput.value);
        
        if (!isNaN(lat) && !isNaN(lng)) {
            geoLocationInput.value = `${lat};${lng}`; // Use semicolon format for NocoDB
            geoLocationInput.classList.remove('invalid');
            geoLocationInput.classList.add('valid');
        }
    }
    
    // When geo-location changes, parse and update lat/lng
    function parseGeoLocation() {
        const geoValue = geoLocationInput.value.trim();
        
        if (!geoValue) {
            geoLocationInput.classList.remove('valid', 'invalid');
            return;
        }
        
        if (!validateGeoLocation(geoValue)) {
            geoLocationInput.classList.add('invalid');
            geoLocationInput.classList.remove('valid');
            return;
        }
        
        // Try semicolon-separated first
        let parts = geoValue.split(';');
        if (parts.length === 2) {
            const lat = parseFloat(parts[0].trim());
            const lng = parseFloat(parts[1].trim());
            if (!isNaN(lat) && !isNaN(lng)) {
                latInput.value = lat.toFixed(8);
                lngInput.value = lng.toFixed(8);
                // Keep semicolon format for NocoDB GeoData
                geoLocationInput.value = `${lat};${lng}`;
                geoLocationInput.classList.add('valid');
                geoLocationInput.classList.remove('invalid');
                return;
            }
        }
        
        // Try comma-separated
        parts = geoValue.split(',');
        if (parts.length === 2) {
            const lat = parseFloat(parts[0].trim());
            const lng = parseFloat(parts[1].trim());
            if (!isNaN(lat) && !isNaN(lng)) {
                latInput.value = lat.toFixed(8);
                lngInput.value = lng.toFixed(8);
                // Normalize to semicolon format for NocoDB GeoData
                geoLocationInput.value = `${lat};${lng}`;
                geoLocationInput.classList.add('valid');
                geoLocationInput.classList.remove('invalid');
            }
        }
    }
    
    // Add event listeners
    latInput.addEventListener('input', updateGeoLocation);
    lngInput.addEventListener('input', updateGeoLocation);
    geoLocationInput.addEventListener('blur', parseGeoLocation);
    geoLocationInput.addEventListener('input', () => {
        // Clear validation classes on input to allow real-time feedback
        const geoValue = geoLocationInput.value.trim();
        if (geoValue && validateGeoLocation(geoValue)) {
            geoLocationInput.classList.add('valid');
            geoLocationInput.classList.remove('invalid');
        } else if (geoValue) {
            geoLocationInput.classList.add('invalid');
            geoLocationInput.classList.remove('valid');
        } else {
            geoLocationInput.classList.remove('valid', 'invalid');
        }
    });
}

// Check authentication and display user info
async function checkAuthentication() {
    try {
        const response = await fetch('/api/auth/check');
        const data = await response.json();
        
        if (data.authenticated && data.user) {
            currentUser = data.user;
            displayUserInfo();
        }
    } catch (error) {
        console.error('Failed to check authentication:', error);
    }
}

// Display user info in header
function displayUserInfo() {
    const headerActions = document.querySelector('.header-actions');
    
    // Create user info element
    const userInfo = document.createElement('div');
    userInfo.className = 'user-info';
    userInfo.innerHTML = `
        <span class="user-email">${escapeHtml(currentUser.email)}</span>
        <button id="logout-btn" class="btn btn-secondary btn-sm" title="Sign out">
            🚪 Logout
        </button>
    `;
    
    // Insert before the location count
    const locationCount = document.getElementById('location-count');
    headerActions.insertBefore(userInfo, locationCount);
    
    // Add logout event listener
    document.getElementById('logout-btn').addEventListener('click', handleLogout);
}

// Handle logout
async function handleLogout() {
    if (!confirm('Are you sure you want to logout?')) {
        return;
    }
    
    try {
        const response = await fetch('/api/auth/logout', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            }
        });
        
        if (response.ok) {
            window.location.href = '/login.html';
        } else {
            showStatus('Logout failed. Please try again.', 'error');
        }
    } catch (error) {
        console.error('Logout error:', error);
        showStatus('Logout failed. Please try again.', 'error');
    }
}

// Check API configuration
async function checkConfiguration() {
    try {
        const response = await fetch('/api/config-check');
        const data = await response.json();
        
        if (!data.configured) {
            showStatus('Warning: API not fully configured. Check your .env file.', 'warning');
        }
    } catch (error) {
        console.error('Configuration check failed:', error);
    }
}

// Load locations from API
async function loadLocations() {
    try {
        const response = await fetch('/api/locations');
        
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        
        const data = await response.json();
        
        if (data.success) {
            displayLocations(data.locations);
            updateLocationCount(data.count);
        } else {
            throw new Error(data.error || 'Failed to load locations');
        }
        
    } catch (error) {
        console.error('Error loading locations:', error);
        showStatus('Failed to load locations. Check your connection.', 'error');
        updateLocationCount(0);
    }
}

// Display locations on map
function displayLocations(locations) {
    // Clear existing markers
    markers.forEach(marker => map.removeLayer(marker));
    markers = [];
    
    // Add new markers
    locations.forEach(location => {
        if (location.latitude && location.longitude) {
            const marker = createLocationMarker(location);
            markers.push(marker);
        }
    });
    
    // Fit map to show all markers if there are any
    if (markers.length > 0) {
        const group = new L.featureGroup(markers);
        map.fitBounds(group.getBounds().pad(0.1));
    }
}

// Create marker for location (updated to use circle markers)
function createLocationMarker(location) {
    console.log('Creating marker for location:', location);
    
    // Get color based on support level
    const supportColor = getSupportColor(location['Support Level']);
    
    // Create circle marker instead of default marker
    const marker = L.circleMarker([location.latitude, location.longitude], {
        radius: 8,
        fillColor: supportColor,
        color: '#fff',
        weight: 2,
        opacity: 1,
        fillOpacity: 0.8,
        title: location.title || 'Location',
        riseOnHover: true,
        locationData: location // Store location data in marker options
    }).addTo(map);
    
    // Add larger radius on hover
    marker.on('mouseover', function() {
        this.setRadius(10);
    });
    
    marker.on('mouseout', function() {
        this.setRadius(8);
    });
    
    // Create popup content
    const popupContent = createPopupContent(location);
    marker.bindPopup(popupContent);
    
    return marker;
}

// Create popup content for marker
function createPopupContent(location) {
    console.log('Creating popup for location:', location);
    
    let content = '<div class="popup-content">';
    
    // Handle name
    let displayName = '';
    if (location.title) {
        displayName = location.title;
    } else if (location['First Name'] || location['Last Name']) {
        const firstName = location['First Name'] || '';
        const lastName = location['Last Name'] || '';
        displayName = `${firstName} ${lastName}`.trim();
    }
    
    if (displayName) {
        content += `<h3>${escapeHtml(displayName)}</h3>`;
    }
    
    // Support Level with color indicator
    const supportColor = getSupportColor(location['Support Level']);
    const supportText = getSupportLevelText(location['Support Level']);
    content += `<p><strong>Support Level:</strong> <span style="display: inline-block; width: 12px; height: 12px; border-radius: 50%; background-color: ${supportColor}; margin-right: 5px;"></span>${escapeHtml(supportText)}</p>`;
    
    // Display all available fields
    if (location['Email']) {
        content += `<p><strong>Email:</strong> ${escapeHtml(location['Email'])}</p>`;
    }
    
    if (location['Unit Number']) {
        content += `<p><strong>Unit Number:</strong> ${escapeHtml(location['Unit Number'])}</p>`;
    }
    
    if (location['Address']) {
        content += `<p><strong>Address:</strong> ${escapeHtml(location['Address'])}</p>`;
    }
    
    // Sign information
    if (location['Sign']) {
        content += `<p><strong>Has Sign:</strong> Yes`;
        if (location['Sign Size']) {
            content += ` (${escapeHtml(location['Sign Size'])})`;
        }
        content += '</p>';
    }
    
    if (location.description) {
        content += `<p><strong>Description:</strong> ${escapeHtml(location.description)}</p>`;
    }
    
    if (location.category) {
        content += `<p><strong>Category:</strong> ${escapeHtml(location.category)}</p>`;
    }
    
    content += '<div class="popup-meta">';
    content += `<p><strong>Coordinates:</strong> ${location.latitude.toFixed(6)}, ${location.longitude.toFixed(6)}</p>`;
    
    if (location['Geo-Location']) {
        content += `<p><strong>Geo-Location:</strong> ${escapeHtml(location['Geo-Location'])}</p>`;
    }
    
    if (location.created_at) {
        const date = new Date(location.created_at);
        content += `<p><strong>Added:</strong> ${date.toLocaleDateString()}</p>`;
    }
    
    if (location.updated_at) {
        const date = new Date(location.updated_at);
        content += `<p><strong>Updated:</strong> ${date.toLocaleDateString()}</p>`;
    }
    
    content += '</div>';
    
    // Add edit button with data attribute instead of onclick
    content += `<div style="margin-top: 10px; text-align: center;">`;
    content += `<button class="btn btn-primary btn-sm edit-location-btn" data-location-id="${location.id || location.Id}">✏️ Edit</button>`;
    content += '</div>';
    
    content += '</div>';
    
    return content;
}

// Handle geolocation
function handleGeolocation() {
    if (!navigator.geolocation) {
        showStatus('Geolocation is not supported by your browser', 'error');
        return;
    }
    
    showStatus('Getting your location...', 'info');
    
    navigator.geolocation.getCurrentPosition(
        (position) => {
            const { latitude, longitude, accuracy } = position.coords;
            
            // Center map on user location
            map.setView([latitude, longitude], 15);
            
            // Remove existing user marker
            if (userLocationMarker) {
                map.removeLayer(userLocationMarker);
            }
            
            // Add user location marker
            userLocationMarker = L.marker([latitude, longitude], {
                icon: L.divIcon({
                    html: '<div style="background-color: #2c5aa0; width: 20px; height: 20px; border-radius: 50%; border: 3px solid white; box-shadow: 0 2px 5px rgba(0,0,0,0.3);"></div>',
                    className: 'user-location-marker',
                    iconSize: [20, 20],
                    iconAnchor: [10, 10]
                }),
                title: 'Your location'
            }).addTo(map);
            
            // Add accuracy circle
            L.circle([latitude, longitude], {
                radius: accuracy,
                color: '#2c5aa0',
                fillColor: '#2c5aa0',
                fillOpacity: 0.1,
                weight: 1
            }).addTo(map);
            
            showStatus(`Location found (±${Math.round(accuracy)}m accuracy)`, 'success');
        },
        (error) => {
            let message = 'Unable to get your location';
            
            switch (error.code) {
                case error.PERMISSION_DENIED:
                    message = 'Location permission denied';
                    break;
                case error.POSITION_UNAVAILABLE:
                    message = 'Location information unavailable';
                    break;
                case error.TIMEOUT:
                    message = 'Location request timed out';
                    break;
            }
            
            showStatus(message, 'error');
        },
        {
            enableHighAccuracy: true,
            timeout: 10000,
            maximumAge: 0
        }
    );
}

// Toggle add location mode
function toggleAddLocation() {
    isAddingLocation = !isAddingLocation;
    
    const btn = document.getElementById('add-location-btn');
    const crosshair = document.getElementById('crosshair');
    
    if (isAddingLocation) {
        btn.innerHTML = '<span class="btn-icon">✕</span><span class="btn-text">Cancel</span>';
        btn.classList.remove('btn-success');
        btn.classList.add('btn-secondary');
        crosshair.classList.remove('hidden');
        map.getContainer().style.cursor = 'crosshair';
    } else {
        btn.innerHTML = '<span class="btn-icon">➕</span><span class="btn-text">Add Location Here</span>';
        btn.classList.remove('btn-secondary');
        btn.classList.add('btn-success');
        crosshair.classList.add('hidden');
        map.getContainer().style.cursor = '';
    }
}

// Handle map click
function handleMapClick(e) {
    if (!isAddingLocation) return;
    
    const { lat, lng } = e.latlng;
    
    // Toggle off add location mode
    toggleAddLocation();
    
    // Show modal with coordinates
    showAddLocationModal(lat, lng);
}

// Show add location modal
function showAddLocationModal(lat, lng) {
    const modal = document.getElementById('add-modal');
    const latInput = document.getElementById('location-lat');
    const lngInput = document.getElementById('location-lng');
    const geoLocationInput = document.getElementById('geo-location');
    
    // Set coordinates
    latInput.value = lat.toFixed(8);
    lngInput.value = lng.toFixed(8);
    
    // Set geo-location field
    geoLocationInput.value = `${lat.toFixed(8)};${lng.toFixed(8)}`; // Use semicolon format for NocoDB
    geoLocationInput.classList.add('valid');
    geoLocationInput.classList.remove('invalid');
    
    // Clear other fields
    document.getElementById('first-name').value = '';
    document.getElementById('last-name').value = '';
    document.getElementById('location-email').value = '';
    document.getElementById('location-unit').value = '';
    document.getElementById('support-level').value = '';
    const addressInput = document.getElementById('location-address');
    addressInput.value = 'Looking up address...'; // Show loading message
    document.getElementById('sign').checked = false;
    document.getElementById('sign-size').value = '';
    
    // Show modal
    modal.classList.remove('hidden');
    
    // Fetch address asynchronously
    reverseGeocode(lat, lng).then(result => {
        if (result) {
            addressInput.value = result.formattedAddress || result.fullAddress;
        } else {
            addressInput.value = ''; // Clear if lookup fails
            // Don't show warning for automatic lookups
        }
    }).catch(error => {
        console.error('Address lookup failed:', error);
        addressInput.value = '';
    });
    
    // Focus on first name input
    setTimeout(() => {
        document.getElementById('first-name').focus();
    }, 100);
}

// Close modal
function closeModal() {
    document.getElementById('add-modal').classList.add('hidden');
}

// Edit location function
function editLocation(locationId) {
    // Find the location in markers data
    const location = markers.find(m => {
        const data = m.options.locationData;
        return String(data.id || data.Id) === String(locationId);
    })?.options.locationData;
    
    if (!location) {
        console.error('Location not found for ID:', locationId);
        console.log('Available locations:', markers.map(m => ({
            id: m.options.locationData.id || m.options.locationData.Id,
            name: m.options.locationData['First Name'] + ' ' + m.options.locationData['Last Name']
        })));
        showStatus('Location not found', 'error');
        return;
    }
    
    currentEditingLocation = location;
    
    // Populate all the edit form fields
    document.getElementById('edit-location-id').value = location.id || location.Id || '';
    document.getElementById('edit-first-name').value = location['First Name'] || '';
    document.getElementById('edit-last-name').value = location['Last Name'] || '';
    document.getElementById('edit-location-email').value = location['Email'] || '';
    document.getElementById('edit-location-unit').value = location['Unit Number'] || '';
    document.getElementById('edit-support-level').value = location['Support Level'] || '';
    
    const addressInput = document.getElementById('edit-location-address');
    addressInput.value = location['Address'] || '';
    
    // If no address exists, try to fetch it
    if (!location['Address'] && location.latitude && location.longitude) {
        addressInput.value = 'Looking up address...';
        reverseGeocode(location.latitude, location.longitude).then(result => {
            if (result && !location['Address']) {
                addressInput.value = result.formattedAddress || result.fullAddress;
            } else if (!location['Address']) {
                addressInput.value = '';
                // Don't show error - just silently fail
            }
        }).catch(error => {
            // Handle any unexpected errors
            console.error('Address lookup failed:', error);
            addressInput.value = '';
        });
    }
    
    // Handle checkbox
    document.getElementById('edit-sign').checked = location['Sign'] === true || location['Sign'] === 'true' || location['Sign'] === 1;
    document.getElementById('edit-sign-size').value = location['Sign Size'] || '';
    
    document.getElementById('edit-location-lat').value = location.latitude || '';
    document.getElementById('edit-location-lng').value = location.longitude || '';
    document.getElementById('edit-geo-location').value = location['Geo-Location'] || `${location.latitude};${location.longitude}`;
    
    // Show the edit footer
    document.getElementById('edit-footer').classList.remove('hidden');
    document.getElementById('map-container').classList.add('edit-mode');
    
    // Invalidate map size after showing footer
    setTimeout(() => map.invalidateSize(), 300);
    
    // Setup geo field sync for edit form
    setupEditGeoFieldSync();
}

// Close edit footer
function closeEditFooter() {
    document.getElementById('edit-footer').classList.add('hidden');
    document.getElementById('map-container').classList.remove('edit-mode');
    currentEditingLocation = null;
    
    // Invalidate map size after hiding footer
    setTimeout(() => map.invalidateSize(), 300);
}

// Setup geo field sync for edit form
function setupEditGeoFieldSync() {
    const latInput = document.getElementById('edit-location-lat');
    const lngInput = document.getElementById('edit-location-lng');
    const geoLocationInput = document.getElementById('edit-geo-location');
    
    // Similar to setupGeoFieldSync but for edit form
    function updateGeoLocation() {
        const lat = parseFloat(latInput.value);
        const lng = parseFloat(lngInput.value);
        
        if (!isNaN(lat) && !isNaN(lng)) {
            geoLocationInput.value = `${lat};${lng}`;
            geoLocationInput.classList.remove('invalid');
            geoLocationInput.classList.add('valid');
        }
    }
    
    function parseGeoLocation() {
        const geoValue = geoLocationInput.value.trim();
        
        if (!geoValue) {
            geoLocationInput.classList.remove('valid', 'invalid');
            return;
        }
        
        // Try semicolon-separated first
        let parts = geoValue.split(';');
        if (parts.length === 2) {
            const lat = parseFloat(parts[0].trim());
            const lng = parseFloat(parts[1].trim());
            if (!isNaN(lat) && !isNaN(lng)) {
                latInput.value = lat.toFixed(8);
                lngInput.value = lng.toFixed(8);
                geoLocationInput.classList.add('valid');
                geoLocationInput.classList.remove('invalid');
                return;
            }
        }
        
        // Try comma-separated
        parts = geoValue.split(',');
        if (parts.length === 2) {
            const lat = parseFloat(parts[0].trim());
            const lng = parseFloat(parts[1].trim());
            if (!isNaN(lat) && !isNaN(lng)) {
                latInput.value = lat.toFixed(8);
                lngInput.value = lng.toFixed(8);
                geoLocationInput.value = `${lat};${lng}`;
                geoLocationInput.classList.add('valid');
                geoLocationInput.classList.remove('invalid');
            }
        }
    }
    
    latInput.addEventListener('input', updateGeoLocation);
    lngInput.addEventListener('input', updateGeoLocation);
    geoLocationInput.addEventListener('blur', parseGeoLocation);
}

// Handle edit form submission
async function handleEditLocationSubmit(e) {
    e.preventDefault();
    
    const formData = new FormData(e.target);
    const data = Object.fromEntries(formData);
    const locationId = data.id;
    
    // Ensure Geo-Location field is included
    const geoLocationInput = document.getElementById('edit-geo-location');
    if (geoLocationInput.value) {
        data['Geo-Location'] = geoLocationInput.value;
    }
    
    try {
        const response = await fetch(`/api/locations/${locationId}`, {
            method: 'PUT',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(data)
        });
        
        const result = await response.json();
        
        if (response.ok && result.success) {
            showStatus('Location updated successfully!', 'success');
            closeEditFooter();
            
            // Reload locations
            loadLocations();
        } else {
            throw new Error(result.error || 'Failed to update location');
        }
        
    } catch (error) {
        console.error('Error updating location:', error);
        showStatus(error.message, 'error');
    }
}

// Delete location
async function deleteLocation() {
    if (!currentEditingLocation) return;
    
    const locationId = currentEditingLocation.id || currentEditingLocation.Id;
    
    if (!confirm('Are you sure you want to delete this location?')) {
        return;
    }
    
    try {
        const response = await fetch(`/api/locations/${locationId}`, {
            method: 'DELETE'
        });
        
        const result = await response.json();
        
        if (response.ok && result.success) {
            showStatus('Location deleted successfully!', 'success');
            closeEditFooter();
            
            // Reload locations
            loadLocations();
        } else {
            throw new Error(result.error || 'Failed to delete location');
        }
        
    } catch (error) {
        console.error('Error deleting location:', error);
        showStatus(error.message, 'error');
    }
}

// Handle location form submission
async function handleLocationSubmit(e) {
    e.preventDefault();
    
    const formData = new FormData(e.target);
    const data = Object.fromEntries(formData);
    
    // Validate required fields - either first name or last name should be provided
    if ((!data['First Name'] || !data['First Name'].trim()) && 
        (!data['Last Name'] || !data['Last Name'].trim())) {
        showStatus('Either First Name or Last Name is required', 'error');
        return;
    }
    
    // Ensure Geo-Location field is included
    const geoLocationInput = document.getElementById('geo-location');
    if (geoLocationInput.value) {
        data['Geo-Location'] = geoLocationInput.value;
    }
    
    try {
        const response = await fetch('/api/locations', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(data)
        });
        
        const result = await response.json();
        
        if (response.ok && result.success) {
            showStatus('Location added successfully!', 'success');
            closeModal();
            
            // Reload locations
            loadLocations();
            
            // Center map on new location
            map.setView([data.latitude, data.longitude], map.getZoom());
        } else {
            throw new Error(result.error || 'Failed to add location');
        }
        
    } catch (error) {
        console.error('Error adding location:', error);
        showStatus(error.message, 'error');
    }
}

// Toggle fullscreen
function toggleFullscreen() {
    const app = document.getElementById('app');
    const btn = document.getElementById('fullscreen-btn');
    
    if (!document.fullscreenElement) {
        app.requestFullscreen().then(() => {
            app.classList.add('fullscreen');
            btn.innerHTML = '<span class="btn-icon">✕</span><span class="btn-text">Exit Fullscreen</span>';
            
            // Invalidate map size after transition
            setTimeout(() => map.invalidateSize(), 300);
        }).catch(err => {
            showStatus('Unable to enter fullscreen', 'error');
        });
    } else {
        document.exitFullscreen().then(() => {
            app.classList.remove('fullscreen');
            btn.innerHTML = '<span class="btn-icon">⛶</span><span class="btn-text">Fullscreen</span>';
            
            // Invalidate map size after transition
            setTimeout(() => map.invalidateSize(), 300);
        });
    }
}

// Update location count
function updateLocationCount(count) {
    const countElement = document.getElementById('location-count');
    countElement.textContent = `${count} location${count !== 1 ? 's' : ''}`;
}

// Show status message
function showStatus(message, type = 'info') {
    const container = document.getElementById('status-container');
    
    const messageDiv = document.createElement('div');
    messageDiv.className = `status-message ${type}`;
    messageDiv.textContent = message;
    
    container.appendChild(messageDiv);
    
    // Auto-remove after 5 seconds
    setTimeout(() => {
        messageDiv.remove();
    }, 5000);
}

// Escape HTML to prevent XSS
function escapeHtml(text) {
    if (text === null || text === undefined) {
        return '';
    }
    const div = document.createElement('div');
    div.textContent = String(text);
    return div.innerHTML;
}

// Handle window resize
window.addEventListener('resize', () => {
    map.invalidateSize();
});

// Clean up on page unload
window.addEventListener('beforeunload', () => {
    if (refreshInterval) {
        clearInterval(refreshInterval);
    }
});

// Reverse geocode to get address from coordinates
async function reverseGeocode(lat, lng) {
    try {
        const response = await fetch(`/api/geocode/reverse?lat=${lat}&lng=${lng}`);
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.error || 'Geocoding service unavailable');
        }
        
        const result = await response.json();
        
        if (!result.success || !result.data) {
            throw new Error('Geocoding failed');
        }
        
        return result.data;
        
    } catch (error) {
        console.error('Reverse geocoding error:', error);
        return null;
    }
}

// Add a new function for forward geocoding (address to coordinates)
async function forwardGeocode(address) {
    try {
        const response = await fetch(`/api/geocode/forward?address=${encodeURIComponent(address)}`);
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.error || 'Geocoding service unavailable');
        }
        
        const result = await response.json();
        
        if (!result.success || !result.data) {
            throw new Error('Geocoding failed');
        }
        
        return result.data;
        
    } catch (error) {
        console.error('Forward geocoding error:', error);
        return null;
    }
}

// Manual address lookup for add form
async function lookupAddressForAdd() {
    const latInput = document.getElementById('location-lat');
    const lngInput = document.getElementById('location-lng');
    const addressInput = document.getElementById('location-address');
    
    const lat = parseFloat(latInput.value);
    const lng = parseFloat(lngInput.value);
    
    if (!isNaN(lat) && !isNaN(lng)) {
        addressInput.value = 'Looking up address...';
        const result = await reverseGeocode(lat, lng);
        if (result) {
            addressInput.value = result.formattedAddress || result.fullAddress;
            showStatus('Address found!', 'success');
        } else {
            addressInput.value = '';
            showStatus('Could not find address for these coordinates', 'warning');
        }
    } else {
        showStatus('Please enter valid coordinates first', 'warning');
    }
}

// Manual address lookup for edit form
async function lookupAddressForEdit() {
    const latInput = document.getElementById('edit-location-lat');
    const lngInput = document.getElementById('edit-location-lng');
    const addressInput = document.getElementById('edit-location-address');
    
    const lat = parseFloat(latInput.value);
    const lng = parseFloat(lngInput.value);
    
    if (!isNaN(lat) && !isNaN(lng)) {
        addressInput.value = 'Looking up address...';
        const result = await reverseGeocode(lat, lng);
        if (result) {
            addressInput.value = result.formattedAddress || result.fullAddress;
            showStatus('Address found!', 'success');
        } else {
            addressInput.value = '';
            showStatus('Could not find address for these coordinates', 'warning');
        }
    } else {
        showStatus('Please enter valid coordinates first', 'warning');
    }
}