كيف تبني خريطة للبحث عن مقدمي الرعاية الصحية متوافقة مع GDPR

const providers = {
  type: "FeatureCollection",
  features: [
    {
      type: "Feature",
      geometry: { type: "Point", coordinates: [4.9051, 52.3680] },
      properties: {
        id: "prov-001",
        name: "Dr. Maria van den Berg",
        specialty: "general-practitioner",
        accepting: true,
        address: "Prinsengracht 263, 1016 GV Amsterdam",
        phone: "+31 20 423 5678",
        languages: ["Dutch", "English"],
        nextAvailable: "2026-02-18"
      }
    },
    {
      type: "Feature",
      geometry: { type: "Point", coordinates: [4.8890, 52.3610] },
      properties: {
        id: "prov-002",
        name: "Dr. Jan Smits",
        specialty: "cardiologist",
        accepting: false,
        address: "Leidseplein 15, 1017 PS Amsterdam",
        phone: "+31 20 612 3456",
        languages: ["Dutch"],
        nextAvailable: null
      }
    },
    {
      type: "Feature",
      geometry: { type: "Point", coordinates: [4.9200, 52.3750] },
      properties: {
        id: "prov-003",
        name: "Anna Fischer, MD",
        specialty: "dermatologist",
        accepting: true,
        address: "Plantage Middenlaan 14, 1018 DD Amsterdam",
        phone: "+31 20 789 0123",
        languages: ["Dutch", "English", "German"],
        nextAvailable: "2026-02-20"
      }
    }
  ]
};

import mapmetricsgl from '@mapmetrics/mapmetrics-gl';
import '@mapmetrics/mapmetrics-gl/dist/mapmetrics-gl.css';

const map = new mapmetricsgl.Map({
  container: 'provider-map',
  style: 'https://gateway.mapmetrics-atlas.net/styles/?fileName=YOUR_STYLE_ID/style.json&token=YOUR_API_KEY',
  center: [4.9041, 52.3676],
  zoom: 13
});

map.on('load', () => {
  map.addSource('providers', {
    type: 'geojson',
    data: providers
  });

  // علامات مقدمي الرعاية، الأخضر = يقبل مرضى جددًا، الرمادي = مكتمل
  map.addLayer({
    id: 'provider-markers',
    type: 'circle',
    source: 'providers',
    paint: {
      'circle-radius': 10,
      'circle-color': [
        'case',
        ['==', ['get', 'accepting'], true], '#16A34A',
        '#9CA3AF'
      ],
      'circle-stroke-width': 2,
      'circle-stroke-color': '#ffffff'
    }
  });

  buildList(providers.features);
});

// فلتر التخصص
document.getElementById('specialty-select').addEventListener('change', (e) => {
  const specialty = e.target.value;
  if (specialty === 'all') {
    map.setFilter('provider-markers', null);
  } else {
    map.setFilter('provider-markers', ['==', ['get', 'specialty'], specialty]);
  }
});

async function geocodePostcode(postcode) {
  // استدعِ الخادم الخلفي الخاص بك، لا Geocoding API مباشرة
  const res = await fetch(`/api/geocode?q=${encodeURIComponent(postcode)}`);
  const { lat, lng } = await res.json();
  return { lat, lng };
}

document.getElementById('postcode-form').addEventListener('submit', async (e) => {
  e.preventDefault();
  const postcode = document.getElementById('postcode-input').value.trim();
  const { lat, lng } = await geocodePostcode(postcode);
  map.flyTo({ center: [lng, lat], zoom: 13 });
  fetchIsochrone(lat, lng);
});

// /api/geocode، على الخادم فقط، والرمز البريدي لا يغادر بنيتك التحتية
app.get('/api/geocode', async (req, res) => {
  const url = new URL('https://gateway.mapmetrics-atlas.net/forward-geocode/');
  url.searchParams.set('text', req.query.q);
  url.searchParams.set('token', process.env.MAPATLAS_API_KEY); // مفتاح على الخادم
  url.searchParams.set('size', '1');

  const upstream = await fetch(url.toString());
  const data = await upstream.json();

  if (!data.features?.length) {
    return res.status(404).json({ error: 'Postcode not found' });
  }

  const [lng, lat] = data.features[0].geometry.coordinates;
  // أرجع الإحداثيات فقط، دون تسجيل الرمز البريدي ودون التخصص في الاستجابة
  res.json({ lat, lng });
});

async function fetchIsochrone(lat, lng) {
  // استدعِ عبر الوكيل في الخادم الخلفي لأسباب الخصوصية نفسها
  const res = await fetch(
    `/api/isochrone?lat=${lat}&lng=${lng}&minutes=20&costing=auto`
  );
  const geojson = await res.json();

  // إزالة طبقة خط الزمن المتساوي الحالية إن وُجدت
  if (map.getLayer('isochrone-fill')) map.removeLayer('isochrone-fill');
  if (map.getLayer('isochrone-border')) map.removeLayer('isochrone-border');
  if (map.getSource('isochrone')) map.removeSource('isochrone');

  map.addSource('isochrone', { type: 'geojson', data: geojson });

  map.addLayer({
    id: 'isochrone-fill',
    type: 'fill',
    source: 'isochrone',
    paint: {
      'fill-color': '#16A34A',
      'fill-opacity': 0.12
    }
  }, 'provider-markers'); // أدرجها أسفل العلامات حتى تظهر الدبابيس في الأعلى

  map.addLayer({
    id: 'isochrone-border',
    type: 'line',
    source: 'isochrone',
    paint: {
      'line-color': '#16A34A',
      'line-width': 2,
      'line-dasharray': [3, 2]
    }
  }, 'provider-markers');
}

app.get('/api/isochrone', async (req, res) => {
  const { lat, lng, minutes, costing } = req.query;
  const url = new URL('https://gateway.mapmetrics-atlas.net/isochrone/');
  url.searchParams.set('token', process.env.MAPATLAS_API_KEY);

  const upstream = await fetch(url.toString(), {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      locations: [{ lat: Number(lat), lon: Number(lng) }],
      costing: costing || 'auto',
      contours: [{ time: Number(minutes) }],
      polygons: true,
    }),
  });
  const data = await upstream.json();
  res.json(data); // مضلع GeoJSON
});

map.on('click', 'provider-markers', (e) => {
  const {
    name, specialty, accepting, address, phone, languages, nextAvailable
  } = e.features[0].properties;
  const coords = e.features[0].geometry.coordinates.slice();

  const statusBadge = accepting
    ? '<span style="color:#16A34A;font-weight:600">Accepting patients</span>'
    : '<span style="color:#9CA3AF">Not accepting new patients</span>';

  const apptLine = accepting && nextAvailable
    ? `<p style="margin:4px 0">Next available: <strong>${nextAvailable}</strong></p>`
    : '';

  new mapmetricsgl.Popup({ maxWidth: '280px' })
    .setLngLat(coords)
    .setHTML(`
      <strong style="font-size:15px">${name}</strong>
      <p style="margin:4px 0;text-transform:capitalize">${specialty.replace('-', ' ')}</p>
      ${statusBadge}
      ${apptLine}
      <p style="margin:6px 0;font-size:13px;color:#64748b">${address}</p>
      <p style="margin:4px 0;font-size:13px">
        Languages: ${Array.isArray(languages) ? languages.join(', ') : languages}
      </p>
      <a href="tel:${phone}" style="color:#2563EB">${phone}</a>
    `)
    .addTo(map);
});

map.on('mouseenter', 'provider-markers', () => { map.getCanvas().style.cursor = 'pointer'; });
map.on('mouseleave', 'provider-markers', () => { map.getCanvas().style.cursor = ''; });

function buildList(features) {
  const list = document.getElementById('provider-list');
  list.innerHTML = '';

  features.forEach(({ properties, geometry }) => {
    const { name, specialty, accepting, address, nextAvailable } = properties;

    const card = document.createElement('div');
    card.className = `provider-card ${accepting ? 'accepting' : 'full'}`;
    card.innerHTML = `
      <strong>${name}</strong>
      <p>${specialty.replace('-', ' ')}</p>
      <p style="font-size:12px;color:#64748b">${address}</p>
      <small>${accepting ? `Next: ${nextAvailable || 'call to confirm'}` : 'Not accepting'}</small>
    `;
    card.addEventListener('click', () => {
      map.flyTo({ center: geometry.coordinates, zoom: 15 });
    });

    list.appendChild(card);
  });
}