// Map view — главный экран
const MapView = {
  map: null,
  markers: [],
  radius: 5,
  visible: true,
  nearby: [],

  async render(root) {
    root.innerHTML = `
      <div class="view">
        <h1>🗺️ Карта</h1>
        <div class="card" id="my-info">
          <div class="row">
            <div>
              <strong>Я на карте</strong>
              <div class="privacy-note">Другие пользователи видят твоё местоположение ±300м</div>
            </div>
            <label class="switch">
              <input type="checkbox" id="visible-toggle" ${this.visible ? 'checked' : ''}>
              <span class="slider"></span>
            </label>
          </div>
        </div>
        <div id="map" style="height:400px;border-radius:12px;overflow:hidden;margin-bottom:12px;"></div>
        <div class="row">
          <label>Радиус: <strong id="radius-label">${this.radius} км</strong></label>
          <select id="radius-sel" style="background:var(--bg-elev);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:6px;">
            <option value="1">1 км</option>
            <option value="5" selected>5 км</option>
            <option value="10">10 км</option>
            <option value="25">25 км</option>
            <option value="50">50 км</option>
          </select>
        </div>
        <div id="nearby-count" class="sub">—</div>
      </div>
    `;

    if (!this.map) {
      this.map = L.map('map').setView([55.7558, 37.6173], 12);
      L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '© OpenStreetMap',
        maxZoom: 19,
      }).addTo(this.map);
    }
    setTimeout(() => this.map.invalidateSize(), 100);

    document.getElementById('visible-toggle').addEventListener('change', async (e) => {
      this.visible = e.target.checked;
      try {
        await API.Auth.setVisibility(this.visible);
        this.refreshLocation();
      } catch (err) {
        API.Store && console.warn(err);
        TG_APP.showAlert('Не удалось обновить видимость');
      }
    });

    document.getElementById('radius-sel').addEventListener('change', (e) => {
      this.radius = parseInt(e.target.value, 10);
      document.getElementById('radius-label').textContent = this.radius + ' км';
      this.refreshNearby();
    });

    this.refreshLocation();
  },

  async refreshLocation() {
    if (!navigator.geolocation) {
      document.getElementById('nearby-count').textContent = 'Геолокация недоступна';
      return;
    }
    navigator.geolocation.getCurrentPosition(
      async (pos) => {
        const lat = pos.coords.latitude;
        const lng = pos.coords.longitude;
        try {
          await API.Auth.updateLocation(lat, lng, this.visible);
        } catch (e) {
          console.warn(e);
        }
        this.map.setView([lat, lng], 13);
        L.circle([lat, lng], {
          radius: this.radius * 1000,
          color: '#FF6B35', fillColor: '#FF6B35', fillOpacity: 0.1, weight: 2,
        }).addTo(this.map);
        this.refreshNearby();
      },
      (err) => {
        document.getElementById('nearby-count').textContent = 'Нет доступа к GPS: ' + err.message;
      },
      { enableHighAccuracy: true, timeout: 15000 }
    );
  },

  async refreshNearby() {
    if (!navigator.geolocation) return;
    navigator.geolocation.getCurrentPosition(async (pos) => {
      try {
        const r = await API.Auth.searchNearby(pos.coords.latitude, pos.coords.longitude, this.radius);
        this.nearby = r.results || [];
        document.getElementById('nearby-count').textContent = this.nearby.length + ' чел. рядом';

        // удалить старые маркеры (кроме своего круга)
        this.markers.forEach(m => this.map.removeLayer(m));
        this.markers = [];

        this.nearby.forEach((n) => {
          const icon = L.divIcon({
            className: 'custom-marker',
            html: `<div style="width:36px;height:36px;border-radius:50%;background:#FF6B35;color:white;display:flex;align-items:center;justify-content:center;font-weight:700;border:2px solid white;">${escapeHtml((n.name || '?')[0])}</div>`,
            iconSize: [36, 36],
          });
          const m = L.marker([n.lat, n.lng], { icon }).addTo(this.map);
          m.bindTooltip(n.name + ' • ' + (n.distance_m / 1000).toFixed(1) + ' км', { direction: 'top' });
          m.on('click', () => App.openUserProfile(n.user_id, n.name));
          this.markers.push(m);
        });
      } catch (e) {
        console.warn(e);
      }
    });
  },
};

window.MapView = MapView;