/**
 * Nominatim-only implementation using MapBase
 */
class NominatimMapApp extends MapBase {
    constructor() {
        super();
        this.initializeMap();
    }
    
    /**
     * Initialize the Leaflet map
     */
    initializeMap() {
        this.map = L.map('map').setView([42.9634, -85.6681], 10);
        
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            maxZoom: 18,
        }).addTo(this.map);
    }
    
    /**
     * Create custom marker for location
     */
    createMarker(location) {
        const isPersistent = !!location.persistent;
        const timeAgo = window.getTimeAgo ? window.getTimeAgo(location.created_at) : '';
        const persistentText = isPersistent ? '<br><small><strong>📌 Persistent Report</strong></small>' : '';
        
        const customIcon = this.createCustomIcon(isPersistent);
        
        const marker = L.marker([location.latitude, location.longitude], {
            icon: customIcon
        })
        .addTo(this.map)
        .bindPopup(`<strong>${location.address}</strong><br>${location.description || 'No additional details'}<br><small>Reported ${timeAgo}</small>${persistentText}`);
        
        return marker;
    }
    
    /**
     * Create custom icon for markers
     */
    createCustomIcon(isPersistent = false) {
        const iconColor = isPersistent ? '#28a745' : '#dc3545'; // Green for persistent, red for temporary
        const iconSymbol = isPersistent ? '🔒' : '⚠️'; // Lock for persistent, warning for temporary
        
        return L.divIcon({
            className: 'custom-marker',
            html: `
                <div style="
                    background-color: ${iconColor};
                    width: 30px;
                    height: 30px;
                    border-radius: 50%;
                    border: 3px solid white;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                    font-size: 14px;
                    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
                    cursor: pointer;
                ">${iconSymbol}</div>
            `,
            iconSize: [30, 30],
            iconAnchor: [15, 15],
            popupAnchor: [0, -15]
        });
    }
    
    /**
     * Search for addresses using Nominatim
     */
    async searchAddress(query) {
        try {
            // Generate multiple search variations for better results
            const searches = [
                query, // Original query
                query.replace(' & ', ' and '), // Replace & with 'and'
                query.replace(' and ', ' & '), // Replace 'and' with &
                query.replace(' at ', ' & '), // Replace 'at' with &
                `${query}, Michigan`, // Add Michigan if not present
                `${query}, MI`, // Add MI if not present
            ];
            
            // Add street type variations
            const streetVariations = [];
            searches.forEach(search => {
                streetVariations.push(search);
                streetVariations.push(search.replace(' St ', ' Street '));
                streetVariations.push(search.replace(' Street ', ' St '));
                streetVariations.push(search.replace(' Ave ', ' Avenue '));
                streetVariations.push(search.replace(' Avenue ', ' Ave '));
                streetVariations.push(search.replace(' Rd ', ' Road '));
                streetVariations.push(search.replace(' Road ', ' Rd '));
                streetVariations.push(search.replace(' Blvd ', ' Boulevard '));
                streetVariations.push(search.replace(' Boulevard ', ' Blvd '));
            });
            
            // Remove duplicates
            const uniqueSearches = [...new Set(streetVariations)];
            
            // Try each search variation until we get results
            for (const searchQuery of uniqueSearches) {
                try {
                    const response = await fetch(`https://nominatim.openstreetmap.org/search?format=json&extratags=1&limit=5&q=${encodeURIComponent(searchQuery)}`);
                    const data = await response.json();
                    
                    if (data && data.length > 0) {
                        // Prefer results that are in Michigan/Grand Rapids
                        const michiganResults = data.filter(item => 
                            item.display_name.toLowerCase().includes('michigan') ||
                            item.display_name.toLowerCase().includes('grand rapids') ||
                            item.display_name.toLowerCase().includes(', mi')
                        );
                        
                        const results = michiganResults.length > 0 ? michiganResults : data;
                        this.showAutocomplete(results.slice(0, 5));
                        return;
                    }
                } catch (error) {
                    console.warn(`Geocoding failed for: "${searchQuery}"`, error);
                }
            }
            
            // If no results found, show empty autocomplete
            this.showAutocomplete([]);
            
        } catch (error) {
            console.error('Error searching addresses:', error);
            this.showAutocomplete([]);
        }
    }
    
    /**
     * Handle form submission with enhanced geocoding
     */
    async handleSubmit() {
        const address = this.addressInput.value.trim();
        const description = this.descriptionInput.value.trim();
        
        if (!address) {
            this.showMessage('Please enter an address', 'error');
            return;
        }
        
        // If coordinates are not set, try to geocode the address
        let lat = parseFloat(this.addressInput.dataset.lat);
        let lon = parseFloat(this.addressInput.dataset.lon);
        
        if (!lat || !lon || isNaN(lat) || isNaN(lon)) {
            // Try to geocode the current address value
            const geocodeResult = await this.geocodeAddress(address);
            if (geocodeResult) {
                lat = parseFloat(geocodeResult.lat);
                lon = parseFloat(geocodeResult.lon);
            } else {
                this.showMessage('Please select a valid address from the suggestions', 'error');
                return;
            }
        }
        
        // Disable submit button
        this.submitButton.disabled = true;
        this.submitButton.innerHTML = '<span class="loading-spinner"></span> Submitting...';
        
        try {
            const response = await fetch('/api/locations', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({
                    address,
                    latitude: lat,
                    longitude: lon,
                    description
                })
            });
            
            const data = await response.json();
            
            if (response.ok) {
                this.showMessage('Location reported successfully!', 'success');
                this.resetForm();
                this.refreshLocations();
            } else {
                this.handleSubmitError(data);
            }
        } catch (error) {
            console.error('Error submitting location:', error);
            this.showMessage('Error submitting location. Please try again.', 'error');
        } finally {
            this.submitButton.disabled = false;
            this.submitButton.innerHTML = '<i class="fas fa-flag"></i> Report Ice';
        }
    }
    
    /**
     * Geocode an address using Nominatim
     */
    async geocodeAddress(address) {
        try {
            const response = await fetch(`https://nominatim.openstreetmap.org/search?format=json&limit=1&q=${encodeURIComponent(address + ', Michigan')}`);
            const data = await response.json();
            
            if (data && data.length > 0) {
                return data[0];
            }
            
            return null;
        } catch (error) {
            console.error('Error geocoding address:', error);
            return null;
        }
    }
}

// Initialize the app when DOM is loaded
document.addEventListener('DOMContentLoaded', () => {
    new NominatimMapApp();
});