school_compare/nextjs-app/components/LeafletMapInner.tsx

/**
 * LeafletMapInner Component
 * Internal Leaflet map implementation (client-side only)
 */

'use client';

import { useEffect, useRef } from 'react';
import L from 'leaflet';
import 'leaflet/dist/leaflet.css';
import type { School } from '@/lib/types';

// Fix for default marker icons in Next.js
delete (L.Icon.Default.prototype as any)._getIconUrl;
L.Icon.Default.mergeOptions({
  iconRetinaUrl: 'https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/images/marker-icon-2x.png',
  iconUrl: 'https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/images/marker-icon.png',
  shadowUrl: 'https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/images/marker-shadow.png',
});

interface LeafletMapInnerProps {
  schools: School[];
  center: [number, number];
  zoom: number;
  onMarkerClick?: (school: School) => void;
}

export default function LeafletMapInner({ schools, center, zoom, onMarkerClick }: LeafletMapInnerProps) {
  const mapRef = useRef<L.Map | null>(null);
  const mapContainerRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    if (!mapContainerRef.current) return;

    // Initialize map
    if (!mapRef.current) {
      mapRef.current = L.map(mapContainerRef.current).setView(center, zoom);

      L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
        maxZoom: 19,
      }).addTo(mapRef.current);
    }

    // Clear existing markers
    mapRef.current.eachLayer((layer) => {
      if (layer instanceof L.Marker) {
        mapRef.current!.removeLayer(layer);
      }
    });

    // Add markers for schools
    schools.forEach((school) => {
      if (school.latitude && school.longitude && mapRef.current) {
        const marker = L.marker([school.latitude, school.longitude]).addTo(mapRef.current);

        // Create popup content
        const popupContent = `
          <div style="min-width: 200px;">
            <strong style="font-size: 14px; display: block; margin-bottom: 8px;">${school.school_name}</strong>
            ${school.local_authority ? `<div style="font-size: 12px; color: #666; margin-bottom: 4px;">${school.local_authority}</div>` : ''}
            ${school.school_type ? `<div style="font-size: 12px; color: #666; margin-bottom: 8px;">${school.school_type}</div>` : ''}
            <a href="/school/${school.urn}" style="display: inline-block; margin-top: 8px; padding: 6px 12px; background: #e07256; color: white; text-decoration: none; border-radius: 4px; font-size: 12px;">View Details</a>
          </div>
        `;

        marker.bindPopup(popupContent);

        if (onMarkerClick) {
          marker.on('click', () => onMarkerClick(school));
        }
      }
    });

    // Update map view
    if (schools.length > 1) {
      const bounds = L.latLngBounds(
        schools
          .filter(s => s.latitude && s.longitude)
          .map(s => [s.latitude!, s.longitude!] as [number, number])
      );
      mapRef.current.fitBounds(bounds, { padding: [50, 50] });
    } else {
      mapRef.current.setView(center, zoom);
    }

    // Cleanup
    return () => {
      // Don't destroy map on every update, just clean markers
    };
  }, [schools, center, zoom, onMarkerClick]);

  // Cleanup map on unmount
  useEffect(() => {
    return () => {
      if (mapRef.current) {
        mapRef.current.remove();
        mapRef.current = null;
      }
    };
  }, []);

  return <div ref={mapContainerRef} style={{ width: '100%', height: '100%' }} />;
}