// Leaflet-kompatible MapLibre-Facade für die SEITENKARTEN (Giftköder, Verlorene,
// Events, Gassi, Routen). Liefert Wrapper, die die von den Seiten genutzte Leaflet-
// API nachbilden (setView/fitBounds/invalidateSize/addTo/bindPopup/openPopup/on/remove),
// sodass die Seiten fast unverändert auf demselben GL-Style (MapGLStyle) laufen.
// Koordinaten nach außen [lat,lon] (Leaflet-Konvention), intern MapLibre [lng,lat].
(function () {
  'use strict';

  // [lat,lon]-Array ODER {lat,lng}-Objekt → [lng,lat] für MapLibre.
  function _ll(latlon) {
    if (latlon && latlon.lat != null) return [latlon.lng, latlon.lat];
    return [latlon[1], latlon[0]];
  }

  // ---- Map-Wrapper ----
  function _wrapMap(map) {
    return {
      _gl: map,
      _isGL: true,
      setView: function (latlon, zoom) { map.jumpTo({ center: _ll(latlon), zoom: zoom }); return this; },
      flyTo: function (latlon, zoom, opts) {
        map.flyTo({ center: _ll(latlon), zoom: zoom, duration: opts && opts.duration ? opts.duration * 1000 : 1000 });
        return this;
      },
      panTo: function (latlon) { map.panTo(_ll(latlon)); return this; },
      fitBounds: function (b, opts) {
        var bb = _toBounds(b);
        // Nur fitten wenn Bounds gültig UND der Container eine Größe hat (im Modal
        // ist er beim Erstellen 0×0 → fitBounds würde NaN werfen; der Re-Fit nach
        // Modal-Animation greift dann).
        var _c = map.getContainer();
        if (bb && !isNaN(bb.getWest()) && _c.clientWidth > 0 && _c.clientHeight > 0) {
          var pad = 30;
          if (opts && opts.padding) pad = Array.isArray(opts.padding) ? opts.padding[0] : opts.padding;
          try { map.fitBounds(bb, { padding: pad, maxZoom: opts && opts.maxZoom, duration: 0 }); } catch (e) {}
        }
        return this;
      },
      invalidateSize: function () { map.resize(); return this; },
      removeLayer: function (layer) { if (layer && layer.remove) layer.remove(); return this; },
      addLayer: function (layer) { if (layer && layer.addTo) layer.addTo(this); return this; },
      hasLayer: function () { return true; },
      remove: function () { try { map.remove(); } catch (e) {} },
      on: function (ev, fn) {
        if (ev === 'click') {
          map.on('click', function (e) { if (e.lngLat && !e.latlng) e.latlng = { lat: e.lngLat.lat, lng: e.lngLat.lng }; fn(e); });
        } else { map.on(ev, fn); }
        return this;
      },
      off: function (ev, fn) { map.off(ev, fn); return this; },
      getZoom: function () { return map.getZoom(); },
      getCenter: function () { var c = map.getCenter(); return { lat: c.lat, lng: c.lng }; },
      // Leaflet-Handler-Stub (z.B. _suggestMap.scrollWheelZoom.disable()).
      scrollWheelZoom: { disable: function () { try { map.scrollZoom.disable(); } catch (e) {} }, enable: function () { try { map.scrollZoom.enable(); } catch (e) {} } },
      // Distanz in Metern (Haversine) — Ersatz für Leaflets map.distance.
      distance: function (a, b) {
        var la = a.lat != null ? a.lat : a[0], lo = a.lng != null ? a.lng : a[1];
        var lb = b.lat != null ? b.lat : b[0], ob = b.lng != null ? b.lng : b[1];
        var R = 6371000, p1 = la * Math.PI / 180, p2 = lb * Math.PI / 180;
        var dp = (lb - la) * Math.PI / 180, dl = (ob - lo) * Math.PI / 180;
        var x = Math.sin(dp / 2) * Math.sin(dp / 2) + Math.cos(p1) * Math.cos(p2) * Math.sin(dl / 2) * Math.sin(dl / 2);
        return 2 * R * Math.asin(Math.sqrt(x));
      },
    };
  }

  // Bounds aus: Array von [lat,lon] | featureGroup-Wrapper (_coords) | Leaflet-Bounds.
  function _toBounds(b) {
    if (!b) return null;
    var coords = null;
    if (Array.isArray(b)) coords = b;
    else if (b._coords) coords = b._coords;
    else if (typeof b.getSouthWest === 'function') {
      var sw = b.getSouthWest(), ne = b.getNorthEast();
      return new maplibregl.LngLatBounds([sw.lng, sw.lat], [ne.lng, ne.lat]);
    }
    if (!coords || !coords.length) return null;
    var bb = new maplibregl.LngLatBounds();
    coords.forEach(function (c) { bb.extend(_ll(c)); });
    return bb;
  }

  // ---- Marker-Wrapper (HTML-Marker; svgMarker + circleMarker) ----
  function _wrapMarker(lat, lon, el, anchor) {
    var m = new maplibregl.Marker({ element: el, anchor: anchor || 'center' }).setLngLat([lon, lat]);
    var wrap = {
      _gl: m,
      _el: el,
      addTo: function (mapWrap) { m.addTo(mapWrap && mapWrap._gl ? mapWrap._gl : mapWrap); return this; },
      bindPopup: function (html, opts) {
        m.setPopup(new maplibregl.Popup({ maxWidth: (opts && opts.maxWidth ? opts.maxWidth + 'px' : '260px'), closeButton: true, offset: 18 }).setHTML(html));
        return this;
      },
      openPopup: function () { var p = m.getPopup(); if (p && !p.isOpen()) m.togglePopup(); return this; },
      closePopup: function () { var p = m.getPopup(); if (p && p.isOpen()) m.togglePopup(); return this; },
      bindTooltip: function (t) { try { el.title = typeof t === 'string' ? t.replace(/<[^>]*>/g, '') : ''; } catch (e) {} return this; },
      on: function (ev, fn) {
        if (ev === 'click') el.addEventListener('click', function (e) { e.stopPropagation(); fn(e); });
        return this;
      },
      setLatLng: function (latlon) { m.setLngLat(_ll(latlon)); return this; },
      getLatLng: function () { var c = m.getLngLat(); return { lat: c.lat, lng: c.lng }; },
      setOpacity: function (o) { el.style.opacity = o; return this; },
      remove: function () { try { m.remove(); } catch (e) {} return this; },
    };
    return wrap;
  }

  // ---- Polyline-Wrapper (GL geojson line-source/-layer) ----
  var _seq = 0;
  function _toLngLat(p) { return (p && p.lat != null) ? [p.lng, p.lat] : [p[1], p[0]]; }  // L.latLng | [lat,lon]
  function _wrapPolyline(latlngs, opts) {
    opts = opts || {};
    return {
      _latlngs: latlngs || [],
      _id: 'poly-' + (++_seq),
      _map: null,
      _opts: opts,
      _handlers: {},        // ev → [fn]
      _tooltip: null,
      _tipPopup: null,
      _geo: function () { return { type: 'Feature', geometry: { type: 'LineString', coordinates: this._latlngs.map(_toLngLat) } }; },
      _hitId: function () { return this._id + '-hit'; },
      _ensure: function () {
        var self = this, m = self._map;
        var add = function () {
          if (!m.getSource(self._id)) m.addSource(self._id, { type: 'geojson', data: self._geo() });
          if (!m.getLayer(self._id)) m.addLayer({ id: self._id, type: 'line', source: self._id,
            layout: { 'line-cap': 'round', 'line-join': 'round' },
            paint: { 'line-color': self._opts.color || '#C4843A', 'line-width': self._opts.weight || 4, 'line-opacity': self._opts.opacity != null ? self._opts.opacity : 0.9 } });
          // Breite, fast unsichtbare Hit-Linie → auf dem Handy gut antippbar.
          if (self._opts.interactive !== false && !m.getLayer(self._hitId())) {
            m.addLayer({ id: self._hitId(), type: 'line', source: self._id,
              layout: { 'line-cap': 'round', 'line-join': 'round' },
              paint: { 'line-color': '#000', 'line-opacity': 0.01, 'line-width': 18 } });
          }
          self._wireAll();
        };
        if (m.isStyleLoaded && m.isStyleLoaded()) add(); else m.once('load', add);
      },
      _wireOne: function (ev, fn) {
        var self = this, m = self._map, hit = self._hitId();
        if (!m.getLayer(hit)) return;
        if (ev === 'click') {
          m.on('click', hit, function (e) { if (e.originalEvent) e.originalEvent.stopPropagation(); fn(e); });
        } else if (ev === 'mouseover') {
          m.on('mouseenter', hit, function (e) { m.getCanvas().style.cursor = 'pointer'; fn(e); });
        } else if (ev === 'mouseout') {
          m.on('mouseleave', hit, function (e) { m.getCanvas().style.cursor = ''; fn(e); });
        }
      },
      _wireAll: function () {
        var self = this;
        Object.keys(self._handlers).forEach(function (ev) {
          self._handlers[ev].forEach(function (fn) { self._wireOne(ev, fn); });
          self._handlers[ev]._wired = true;
        });
        if (self._tooltip && !self._tipWired) self._wireTooltip();
      },
      _wireTooltip: function () {
        var self = this, m = self._map, hit = self._hitId();
        if (!m.getLayer(hit)) return;
        self._tipWired = true;
        m.on('mousemove', hit, function (e) {
          if (!self._tipPopup) self._tipPopup = new maplibregl.Popup({ closeButton: false, closeOnClick: false, offset: 10, className: 'rk-map-tip' });
          self._tipPopup.setLngLat(e.lngLat).setHTML(self._tooltip).addTo(m);
        });
        m.on('mouseleave', hit, function () { if (self._tipPopup) { self._tipPopup.remove(); } });
      },
      addTo: function (mapWrap) { this._map = mapWrap && mapWrap._gl ? mapWrap._gl : mapWrap; this._ensure(); return this; },
      on: function (ev, fn) {
        (this._handlers[ev] = this._handlers[ev] || []).push(fn);
        if (this._map && this._map.getLayer(this._hitId())) this._wireOne(ev, fn);
        return this;
      },
      bindTooltip: function (t) {
        this._tooltip = typeof t === 'string' ? t : '';
        if (this._map && this._map.getLayer(this._hitId())) this._wireTooltip();
        return this;
      },
      setStyle: function (s) {
        var m = this._map; if (!m || !m.getLayer(this._id)) return this;
        if (s.color   != null) m.setPaintProperty(this._id, 'line-color', s.color);
        if (s.weight  != null) m.setPaintProperty(this._id, 'line-width', s.weight);
        if (s.opacity != null) m.setPaintProperty(this._id, 'line-opacity', s.opacity);
        return this;
      },
      setLatLngs: function (lls) {
        this._latlngs = lls || [];
        if (this._map && this._map.getSource(this._id)) this._map.getSource(this._id).setData(this._geo());
        return this;
      },
      // Leaflet-kompatibel: Array von {lat,lng} (für fitBounds-Sammlung).
      getLatLngs: function () { return this._latlngs.map(function (p) { return (p && p.lat != null) ? { lat: p.lat, lng: p.lng } : { lat: p[0], lng: p[1] }; }); },
      getBounds: function () { return { _coords: this._latlngs.map(function (p) { return (p && p.lat != null) ? [p.lat, p.lng] : p; }) }; },
      remove: function () {
        var m = this._map; if (!m) return this;
        if (this._tipPopup) { try { this._tipPopup.remove(); } catch (e) {} }
        if (m.getLayer(this._hitId())) m.removeLayer(this._hitId());
        if (m.getLayer(this._id)) m.removeLayer(this._id);
        if (m.getSource(this._id)) m.removeSource(this._id);
        return this;
      },
    };
  }

  // ---- Gruppe (Cluster-Ersatz: fügt Marker direkt hinzu; GL clustert Seitenkarten nicht) ----
  function _wrapGroup() {
    return {
      _markers: [], _map: null,
      addLayer: function (m) { this._markers.push(m); if (this._map) m.addTo(this._map); return this; },
      addLayers: function (ms) { (ms || []).forEach(this.addLayer, this); return this; },
      removeLayers: function (ms) { (ms || []).forEach(function (m) { m.remove(); }); this._markers = this._markers.filter(function (m) { return (ms || []).indexOf(m) === -1; }); return this; },
      addTo: function (mapWrap) { this._map = mapWrap; this._markers.forEach(function (m) { m.addTo(mapWrap); }); return this; },
      clearLayers: function () { this._markers.forEach(function (m) { m.remove(); }); this._markers = []; return this; },
      remove: function () { this.clearLayers(); this._map = null; return this; },
    };
  }

  // Element aus HTML-String (für svgMarker mit custom HTML).
  function _elFromHtml(html, size, anchorY) {
    var wrap = document.createElement('div');
    wrap.innerHTML = html;
    var el = wrap.firstElementChild || wrap;
    el.style.cursor = 'pointer';
    return el;
  }

  window.MapGLMini = {
    createMap: function (container, opts) {
      opts = opts || {};
      var el = typeof container === 'string' ? document.getElementById(container) : container;
      var center = opts.center || [51.1657, 10.4515];
      var map = new maplibregl.Map({
        container: el,
        style: MapGLStyle.build({ dark: !!opts.dark }),
        center: _ll(center), zoom: opts.zoom != null ? opts.zoom : 6,
        attributionControl: false, dragRotate: false, pitchWithRotate: false, maxZoom: 19,
      });
      map.touchZoomRotate.disableRotation();
      map.touchPitch.disable();
      try { el.style.touchAction = 'none'; } catch (e) {}
      if (opts.zoomControl !== false) map.addControl(new maplibregl.NavigationControl({ showCompass: false }), 'top-left');
      map.addControl(new maplibregl.AttributionControl({
        compact: true, customAttribution: '© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
      }));
      // Container kann beim Erstellen (Modal/Animation) noch 0×0 sein → mehrfach resizen.
      var _rz = function () { try { map.resize(); } catch (e) {} };
      requestAnimationFrame(_rz);
      setTimeout(_rz, 120); setTimeout(_rz, 400);
      return _wrapMap(map);
    },

    // svgMarker: custom HTML-Icon. opts: { size, anchorY }
    svgMarker: function (lat, lon, html, opts) {
      opts = opts || {};
      var el = _elFromHtml(html);
      // anchorY: Pixel von oben zum Ankerpunkt (Leaflet iconAnchor). 'bottom' wenn anchorY≈size.
      var anchor = 'center';
      if (opts.anchorY != null && opts.size) {
        anchor = opts.anchorY >= opts.size * 0.8 ? 'bottom' : 'center';
      }
      return _wrapMarker(lat, lon, el, anchor);
    },

    circleMarker: function (lat, lon, opts) {
      opts = opts || {};
      var r = opts.radius || 8;
      var el = document.createElement('div');
      el.style.cssText = 'width:' + (r * 2) + 'px;height:' + (r * 2) + 'px;border-radius:50%;background:' +
        (opts.fillColor || opts.color || '#3B82F6') + ';border:' + (opts.weight || 2) + 'px solid ' +
        (opts.color || '#fff') + ';opacity:' + (opts.fillOpacity != null ? opts.fillOpacity : 1) +
        ';box-shadow:0 1px 4px rgba(0,0,0,.35);cursor:pointer';
      return _wrapMarker(lat, lon, el, 'center');
    },

    polyline: function (latlngs, opts) { return _wrapPolyline(latlngs, opts); },
    clusterGroup: function () { return _wrapGroup(); },

    // featureGroup: nur als Bounds-Container (markers = Array von Wrappern mit _gl.getLngLat()).
    featureGroup: function (markers) {
      var coords = (markers || []).map(function (m) {
        var ll = m && m._gl && m._gl.getLngLat ? m._gl.getLngLat() : null;
        return ll ? [ll.lat, ll.lng] : null;
      }).filter(Boolean);
      return { _coords: coords, getBounds: function () { return { _coords: coords }; }, addTo: function () { return this; } };
    },
  };
})();