/* ============================================================
   BAN YARO — Gassi-Routen (Komoot-Stil)
   Sammlung, Suche, Bewertung, GPX-Download, Fotos, Nearby POIs
   ============================================================ */

window.Page_routes = (() => {

  let _container = null;
  let _appState  = null;
  let _data      = [];
  let _filtered  = [];
  let _userPos   = null;

  let _search     = '';
  let _difficulty = '';
  let _terrain    = '';
  let _sortBy     = 'newest';
  let _onlyMine   = false;

  let _isRecording = false;
  let _filterOpen  = false;

  // 'mine' | 'discover'
  let _browseMode = 'mine';

  // Ansichts-Modus: 'list' | 'map'
  let _viewMode      = 'list';
  let _searchMap     = null;       // L.map Instanz der Suchkarte
  let _searchLines   = new Map();  // routeId → { line, route }

  // Mini-Karten auf den Route-Cards
  let _miniMaps      = new Map(); // routeId → L.map
  const DIFFICULTY_LABEL = { leicht: '🟢 Leicht', mittel: '🟡 Mittel', anspruchsvoll: '🔴 Anspruchsvoll' };
  const TERRAIN_LABEL    = { wald: '🌲 Wald', asphalt: '🛣️ Asphalt', wiese: '🌿 Wiese', mix: '🔀 Mix' };
  const HUNDE_LABEL      = { eingeschränkt: '🐾', gut: '🐾🐾', sehr_gut: '🐾🐾🐾', premium: '🐾🐾🐾🐾' };

  // POI-Typen die entlang einer Route gezeigt werden
  const NEARBY_TYPES = [
    { type: 'restaurant',     icon: '🍽️', label: 'Restaurant/Café' },
    { type: 'parkplatz',      icon: '🅿️', label: 'Parkplatz'        },
    { type: 'drinking_water', icon: '💧', label: 'Wasserstelle'      },
    { type: 'bank',           icon: '🪑', label: 'Bank'              },
  ];

  // _esc und _emptyState ersetzt durch UI.escape() / UI.emptyState()

  async function init(container, appState) {
    _container = container;
    _appState  = appState;
    _render();
    UI.loadLeaflet(); // fire & forget — bereit wenn Cards gerendert werden
    try { _userPos = await API.getLocation(); } catch {}
    await _loadData();

    // Deep-Link: /#routes?id=123 → direkt Route-Detail öffnen
    const params = new URLSearchParams((location.hash.split('?')[1] || ''));
    const deepId = params.get('id');
    if (deepId) {
      _openDetail(parseInt(deepId, 10));
    }
  }

  function refresh() { _syncRecBtn(); _loadData(); }
  function onDogChange() {}

  // ----------------------------------------------------------
  // Render
  // ----------------------------------------------------------
  function _render() {
    _container.innerHTML = `
      <div class="rk-layout">
        <div class="rk-header">
          <div class="rk-mode-toggle" id="rk-mode-toggle">
            <button class="rk-mode-btn${_browseMode==='mine'?' active':''}" id="rk-mode-mine">${UI.icon('user')} Meine Routen</button>
            <button class="rk-mode-btn${_browseMode==='discover'?' active':''}" id="rk-mode-discover">${UI.icon('compass')} Entdecken</button>
          </div>
          <div class="rk-search-row">
            <div class="diary-search-wrap" style="flex:1;min-width:0">
              <svg class="ph-icon diary-search-icon" aria-hidden="true"><use href="/icons/phosphor.svg#magnifying-glass"></use></svg>
              <input class="diary-search-input" id="rk-search" type="search"
                     placeholder="Routen durchsuchen…" autocomplete="off">
            </div>
            <div class="rk-view-toggle">
              <button class="rk-view-btn${_viewMode==='list'?' active':''}" id="rk-view-list" title="Liste">${UI.icon('list')}</button>
              <button class="rk-view-btn${_viewMode==='map'?' active':''}" id="rk-view-map" title="Karte">${UI.icon('map-trifold')}</button>
            </div>
            <button class="btn btn-secondary btn-sm rk-filter-toggle-btn" id="rk-filter-btn" title="Filter">
              ${UI.icon('funnel')} Filter
              <span class="rk-filter-badge" id="rk-filter-badge" style="display:none"></span>
            </button>
            <label class="btn btn-secondary btn-sm rk-imp-btn" id="rk-imp-wrap" title="GPX / KML / TCX importieren">
              ${UI.icon('download-simple')} Import
              <input type="file" id="rk-import-input" accept=".gpx,.kml,.tcx" style="display:none">
            </label>
            <button class="btn btn-primary btn-sm rk-rec-btn" id="rk-rec-btn">${UI.icon('path')} Aufzeichnen</button>
          </div>
          <div class="rk-filter-panel" id="rk-filter-panel" style="display:none">
            <div class="rk-filters" id="rk-filters">
              <div class="rk-filter-group">
                <div class="rk-filter-label">Schwierigkeit</div>
                <div class="rk-chips-row">
                  <button class="rk-chip active" data-filter="difficulty" data-val="">Alle</button>
                  <button class="rk-chip" data-filter="difficulty" data-val="leicht">🟢 Leicht</button>
                  <button class="rk-chip" data-filter="difficulty" data-val="mittel">🟡 Mittel</button>
                  <button class="rk-chip" data-filter="difficulty" data-val="anspruchsvoll">🔴 Anspruchsvoll</button>
                </div>
              </div>
              <div class="rk-filter-group">
                <div class="rk-filter-label">Untergrund</div>
                <div class="rk-chips-row">
                  <button class="rk-chip active" data-filter="terrain" data-val="">Alle Wege</button>
                  <button class="rk-chip" data-filter="terrain" data-val="wald">🌲 Wald</button>
                  <button class="rk-chip" data-filter="terrain" data-val="asphalt">🛣️ Asphalt</button>
                  <button class="rk-chip" data-filter="terrain" data-val="wiese">🌿 Wiese</button>
                  <button class="rk-chip" data-filter="terrain" data-val="mix">🔀 Mix</button>
                </div>
              </div>
              <div class="rk-filter-group">
                <div class="rk-filter-label">Sortierung</div>
                <div class="rk-chips-row">
                  <button class="rk-chip active" data-filter="sort" data-val="newest">Neueste</button>
                  <button class="rk-chip" data-filter="sort" data-val="distance">Längste</button>
                  <button class="rk-chip" data-filter="sort" data-val="rating">Beste</button>
                  <button class="rk-chip" data-filter="sort" data-val="dog">Hundefreundlich</button>
                </div>
              </div>
              <div class="rk-filter-group" id="rk-mine-group" style="display:none">
                <div class="rk-filter-label">Eigene</div>
                <div class="rk-chips-row">
                  <button class="rk-chip" data-filter="mine" data-val="mine">🔒 Nur meine</button>
                </div>
              </div>
              <div class="rk-filter-group" id="rk-nearby-group" style="display:none">
                <div class="rk-filter-label">Umgebung</div>
                <div class="rk-chips-row">
                  <button class="rk-chip" id="rk-nearby-btn" data-filter="nearby" data-val="">${UI.icon('map-pin')} In meiner Nähe</button>
                </div>
              </div>
            </div>
          </div>
        </div>
        <div class="rk-grid" id="rk-grid">
          <div class="rk-loading">Lädt Routen…</div>
        </div>
      </div>
    `;

    let _searchTimer = null;
    document.getElementById('rk-search').addEventListener('input', e => {
      clearTimeout(_searchTimer);
      _searchTimer = setTimeout(() => {
        _search = e.target.value.toLowerCase().trim();
        _applyFilter();
      }, 300);
    });
    document.getElementById('rk-view-list').addEventListener('click', () => _switchView('list'));
    document.getElementById('rk-view-map').addEventListener('click',  () => _switchView('map'));
    document.getElementById('rk-filter-btn').addEventListener('click', _toggleFilterPanel);
    document.getElementById('rk-rec-btn').addEventListener('click', () => {
      if (window.Page_map?.isRecording?.()) {
        window.Page_map.stopRecording();
        _syncRecBtn();
      } else {
        App.navigate('map');
        setTimeout(() => window.Page_map?.startRecording?.(), 600);
      }
    });
    document.getElementById('rk-import-input').addEventListener('change', e => {
      const file = e.target.files?.[0];
      if (file) _importFile(file);
      e.target.value = ''; // reset so same file can be re-selected
    });
    document.getElementById('rk-filters').addEventListener('click', e => {
      const chip = e.target.closest('.rk-chip');
      if (!chip) return;
      const { filter, val } = chip.dataset;
      chip.closest('.rk-chips-row').querySelectorAll('.rk-chip')
        .forEach(c => c.classList.remove('active'));
      chip.classList.add('active');
      if (filter === 'difficulty') _difficulty = val;
      if (filter === 'terrain')    _terrain    = val;
      if (filter === 'sort')       _sortBy     = val;
      if (filter === 'mine')       _onlyMine   = chip.classList.contains('active') && val === 'mine';
      if (filter === 'nearby')     { _loadDataNearby(); return; } // async, calls _applyFilter itself
      _updateFilterBadge();
      _applyFilter();
    });
    // Mode toggle
    document.getElementById('rk-mode-mine').addEventListener('click', () => _setBrowseMode('mine'));
    document.getElementById('rk-mode-discover').addEventListener('click', () => _setBrowseMode('discover'));
  }

  function _syncRecBtn() {
    const recording = window.Page_map?.isRecording?.() ?? false;
    _isRecording = recording;
    const btn = document.getElementById('rk-rec-btn');
    if (!btn) return;
    if (recording) {
      btn.className = 'btn btn-danger btn-sm rk-rec-btn rk-rec-btn--active';
      btn.innerHTML = UI.icon('path') + ' Stopp aufnehmen';
    } else {
      btn.className = 'btn btn-primary btn-sm rk-rec-btn';
      btn.innerHTML = UI.icon('path') + ' Aufzeichnen';
    }
  }

  function _toggleFilterPanel() {
    _filterOpen = !_filterOpen;
    const panel = document.getElementById('rk-filter-panel');
    const btn   = document.getElementById('rk-filter-btn');
    if (panel) panel.style.display = _filterOpen ? '' : 'none';
    if (btn)   btn.classList.toggle('active', _filterOpen);
  }

  function _updateFilterBadge() {
    const badge = document.getElementById('rk-filter-badge');
    if (!badge) return;
    const hasFilter = _difficulty !== '' || _terrain !== '' || _sortBy !== 'newest' || _onlyMine;
    badge.style.display = hasFilter ? '' : 'none';
  }

  function _setBrowseMode(mode) {
    _browseMode = mode;
    document.getElementById('rk-mode-mine')?.classList.toggle('active', mode === 'mine');
    document.getElementById('rk-mode-discover')?.classList.toggle('active', mode === 'discover');

    const recBtn  = document.getElementById('rk-rec-btn');
    const impWrap = document.getElementById('rk-imp-wrap');
    const mineGrp = document.getElementById('rk-mine-group');
    const nearbyGrp = document.getElementById('rk-nearby-group');

    if (mode === 'discover') {
      if (recBtn)  recBtn.style.display  = 'none';
      if (impWrap) impWrap.style.display = 'none';
      if (mineGrp) mineGrp.style.display = 'none';
      if (nearbyGrp && _userPos) nearbyGrp.style.display = '';
    } else {
      if (recBtn)  recBtn.style.display  = '';
      if (impWrap) impWrap.style.display = '';
      if (_appState.user && mineGrp) mineGrp.style.display = '';
      if (nearbyGrp) nearbyGrp.style.display = 'none';
    }
    _onlyMine = false;
    document.querySelectorAll('#rk-mine-group .rk-chip').forEach(c => c.classList.remove('active'));
    _applyFilter();
  }

  async function _loadDataNearby() {
    if (!_userPos) {
      try { _userPos = await API.getLocation(); } catch { UI.toast.warning('Standort nicht verfügbar.'); return; }
    }
    try {
      _data = await API.routes.listNearby(_userPos.lat, _userPos.lon, 10000);
      _applyFilter();
    } catch (err) {
      UI.toast.error('Fehler beim Laden: ' + err.message);
    }
  }

  // ----------------------------------------------------------
  // View-Toggle
  // ----------------------------------------------------------
  function _switchView(mode) {
    _viewMode = mode;
    document.getElementById('rk-view-list')?.classList.toggle('active', mode === 'list');
    document.getElementById('rk-view-map')?.classList.toggle('active', mode === 'map');

    const layout = document.querySelector('.rk-layout');
    const grid   = document.getElementById('rk-grid');

    if (mode === 'map') {
      if (grid) grid.style.display = 'none';

      // Alten Map-Container entfernen falls vorhanden
      document.getElementById('rk-map-section')?.remove();
      if (_searchMap) { _searchMap.remove(); _searchMap = null; _searchLines.clear(); }

      // Als fixed Overlay direkt in <body> — kein Konflikt mit .rk-layout overflow:hidden
      const mapH = window.innerHeight - 160;
      const sec = document.createElement('div');
      sec.id = 'rk-map-section';
      sec.className = 'rk-map-section';
      sec.innerHTML = `
        <div class="rk-map-bar">
          <button class="btn btn-secondary btn-sm" id="rk-map-back" title="Zurück zur Liste">${UI.icon('arrow-left')}</button>
          <input class="rk-map-loc-input" id="rk-map-loc" type="search"
                 placeholder="🔍 Ort suchen…" autocomplete="off">
          <button class="btn btn-secondary btn-sm" id="rk-map-gps" title="Mein Standort">${UI.icon('map-pin')}</button>
        </div>
        <div id="rk-search-map" style="flex:1;width:100%"></div>
        <div id="rk-map-hint" class="rk-map-hint">Route antippen um Details zu sehen</div>
      `;
      document.body.appendChild(sec);
      document.getElementById('rk-map-back')?.addEventListener('click', () => _switchView('list'));

      // Wie _initMiniMaps: pollen bis window.L bereit ist
      _pollAndInitSearchMap();

    } else {
      document.getElementById('rk-map-section')?.remove();
      if (_searchMap) { _searchMap.remove(); _searchMap = null; _searchLines.clear(); }
      if (grid) grid.style.display = '';
    }
  }

  // ----------------------------------------------------------
  // Suchkarte
  // ----------------------------------------------------------
  function _pollAndInitSearchMap() {
    if (window.L) { _initSearchMap(); return; }
    let tries = 0;
    const poll = setInterval(() => {
      if (window.L || ++tries > 40) {
        clearInterval(poll);
        if (window.L) _initSearchMap();
      }
    }, 100);
  }

  function _initSearchMap() {
    if (!document.getElementById('rk-search-map')) return;

    const center = _userPos ? [_userPos.lat, _userPos.lon] : [51.1, 10.4];
    const zoom   = _userPos ? 13 : 6;

    _searchMap = L.map('rk-search-map', { zoomControl: true, attributionControl: false })
                  .setView(center, zoom);
    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { maxZoom: 19 }).addTo(_searchMap);
    setTimeout(() => _searchMap?.invalidateSize(), 100);
    setTimeout(() => _searchMap?.invalidateSize(), 600);
    _renderRoutesOnMap();

    // Standort-Button
    document.getElementById('rk-map-gps')?.addEventListener('click', async () => {
      try {
        const pos = await API.getLocation();
        _userPos = pos;
        _searchMap.setView([pos.lat, pos.lon], 14);
      } catch { UI.toast.warning('Standort nicht verfügbar.'); }
    });

    // Geocoding-Suche
    const locInput = document.getElementById('rk-map-loc');
    let _geoDebounce;
    locInput?.addEventListener('keydown', e => {
      if (e.key !== 'Enter') return;
      clearTimeout(_geoDebounce);
      _geocodeAndFly(locInput.value.trim());
    });
    locInput?.addEventListener('input', () => {
      clearTimeout(_geoDebounce);
      const q = locInput.value.trim();
      if (q.length < 3) return;
      _geoDebounce = setTimeout(() => _geocodeAndFly(q), 800);
    });
  }

  async function _geocodeAndFly(query) {
    if (!query || !_searchMap) return;
    try {
      const r = await fetch(
        `https://nominatim.openstreetmap.org/search?q=${encodeURIComponent(query)}&format=json&limit=1&accept-language=de`,
        { cache: 'no-store' }
      );
      const data = await r.json();
      if (!data.length) { UI.toast.info('Ort nicht gefunden.'); return; }
      const { lat, lon, boundingbox } = data[0];
      if (boundingbox) {
        _searchMap.fitBounds([[+boundingbox[0], +boundingbox[2]], [+boundingbox[1], +boundingbox[3]]],
          { maxZoom: 14 });
      } else {
        _searchMap.setView([+lat, +lon], 13);
      }
    } catch { UI.toast.warning('Suche fehlgeschlagen.'); }
  }

  function _renderRoutesOnMap() {
    if (!_searchMap || !window.L) return;

    // Alte Linien entfernen
    _searchLines.forEach(({ line }) => line.remove());
    _searchLines.clear();

    const hint = document.getElementById('rk-map-hint');

    _data.forEach(route => {
      const pts = (route.preview_track || []).map(p => [p.lat, p.lon]);
      if (pts.length < 2) return;

      const line = L.polyline(pts, {
        color: '#C4843A', weight: 4, opacity: 0.75,
      }).addTo(_searchMap);

      // Start-/End-Marker
      const startM = L.circleMarker(pts[0], {
        radius: 6, color: '#22C55E', fillColor: '#22C55E', fillOpacity: 1, weight: 1.5
      }).addTo(_searchMap);
      const endM = L.circleMarker(pts[pts.length - 1], {
        radius: 6, color: '#EF4444', fillColor: '#EF4444', fillOpacity: 1, weight: 1.5
      }).addTo(_searchMap);

      // Tooltip mit Namen und Distanz
      const tip = `<b>${UI.escape(route.name)}</b>${route.distanz_km ? ` · ${route.distanz_km.toFixed(1)} km` : ''}`;
      line.bindTooltip(tip, { sticky: true, className: 'rk-map-tooltip' });

      // Hover-Highlight
      line.on('mouseover', () => line.setStyle({ color: '#e67e22', weight: 6, opacity: 1 }));
      line.on('mouseout',  () => line.setStyle({ color: '#C4843A', weight: 4, opacity: 0.75 }));

      // Klick → Detail-Modal (Karte bleibt im Hintergrund erhalten)
      const onClick = () => {
        if (hint) hint.textContent = `Lädt „${route.name}"…`;
        _openDetail(route.id).finally(() => {
          if (hint) hint.textContent = 'Route antippen um Details zu sehen';
        });
      };
      line.on('click', onClick);
      startM.on('click', onClick);

      _searchLines.set(route.id, { line, startM, endM });
    });

    // Wenn Routen vorhanden: Karte auf alle Routes zoomen (nur beim ersten Mal)
    if (_data.length && _searchLines.size && !_userPos) {
      const allPts = [..._searchLines.values()].flatMap(({ line }) => line.getLatLngs());
      if (allPts.length) {
        try { _searchMap.fitBounds(L.latLngBounds(allPts), { padding: [20, 20], maxZoom: 14 }); }
        catch {}
      }
    }
  }

  // ----------------------------------------------------------
  // Daten
  // ----------------------------------------------------------
  async function _loadData() {
    try {
      _data = await API.routes.list();
      // "Meine Routen"-Filter nur zeigen wenn eingeloggt und im Mine-Modus
      if (_appState.user && _browseMode === 'mine') {
        document.getElementById('rk-mine-group')?.style.setProperty('display', '');
      }
      // Standort-abhängiger Filter im Entdecken-Modus
      if (_browseMode === 'discover' && _userPos) {
        document.getElementById('rk-nearby-group')?.style.setProperty('display', '');
      }
      _applyFilter();
    } catch (err) {
      document.getElementById('rk-grid').innerHTML =
        `<p style="color:var(--c-danger);padding:var(--space-6)">Fehler: ${UI.escape(err.message)}</p>`;
    }
  }

  // ----------------------------------------------------------
  // Filter
  // ----------------------------------------------------------
  const DOG_ORDER = { premium: 4, sehr_gut: 3, gut: 2, eingeschränkt: 1 };

  function _applyFilter() {
    let list = [..._data];

    // Browse-Modus-Filter
    if (_browseMode === 'mine' && _appState.user) {
      list = list.filter(r => r.user_id === _appState.user.id);
    } else if (_browseMode === 'discover' && _appState.user) {
      list = list.filter(r => r.user_id !== _appState.user.id);
    }

    if (_search)     list = list.filter(r =>
      (r.name||'').toLowerCase().includes(_search) ||
      (r.beschreibung||'').toLowerCase().includes(_search) ||
      (r.user_name||'').toLowerCase().includes(_search));
    if (_difficulty) list = list.filter(r => r.schwierigkeit === _difficulty);
    if (_terrain)    list = list.filter(r => r.untergrund    === _terrain);
    if (_onlyMine && _appState.user && _browseMode === 'mine')
      list = list.filter(r => r.user_id === _appState.user.id);

    if (_sortBy === 'distance') list.sort((a,b) => (b.distanz_km||0) - (a.distanz_km||0));
    else if (_sortBy === 'rating') list.sort((a,b) => (b.bewertung||0) - (a.bewertung||0));
    else if (_sortBy === 'dog')    list.sort((a,b) =>
      (DOG_ORDER[b.hunde_tauglichkeit]||0) - (DOG_ORDER[a.hunde_tauglichkeit]||0));

    _filtered = list;
    _renderGrid();
    if (_viewMode === 'map' && _searchMap) _renderRoutesOnMap();
  }

  // ----------------------------------------------------------
  // Grid
  // ----------------------------------------------------------
  function _renderGrid() {
    const grid = document.getElementById('rk-grid');
    if (!grid) return;
    if (!_filtered.length) {
      if (_data.length) {
        // Filter aktiv aber kein Ergebnis
        const emptyMsg = _search
          ? `Keine Routen gefunden für „${UI.escape(_search)}".`
          : 'Keine Routen passen zu deinen Filtern.';
        grid.innerHTML = `<div class="rk-empty">
          <div class="rk-empty-icon">🔍</div>
          <p>${emptyMsg}</p>
          <button class="btn btn-secondary" id="rk-empty-reset">Filter zurücksetzen</button>
        </div>`;
        document.getElementById('rk-empty-reset')?.addEventListener('click', () => {
          _search = ''; _difficulty = ''; _terrain = ''; _sortBy = 'newest'; _onlyMine = false;
          document.getElementById('rk-search').value = '';
          document.querySelectorAll('.rk-chip').forEach(c => c.classList.remove('active'));
          document.querySelectorAll('.rk-chip[data-val=""]').forEach(c => c.classList.add('active'));
          document.querySelector('.rk-chip[data-val="newest"]')?.classList.add('active');
          _updateFilterBadge();
          _applyFilter();
        });
      } else if (_browseMode === 'discover') {
        // Entdecken: keine fremden Routen vorhanden
        grid.innerHTML = `<div class="rk-empty">
          <div class="rk-empty-icon">${UI.icon('compass')}</div>
          <h3 class="rk-empty-title">Noch keine öffentlichen Routen</h3>
          <p class="rk-empty-text">Andere Nutzer haben noch keine Routen geteilt. Sei der Erste!</p>
        </div>`;
      } else {
        // Noch gar keine eigenen Routen
        grid.innerHTML = UI.emptyState({
          icon:   UI.icon('map-trifold'),
          title:  'Noch keine Routen',
          text:   'Zeichne Lieblingsrouten auf oder importiere GPX-Dateien. Teile Routen mit Freunden.',
          action: `<button class="btn btn-primary" id="rk-empty-rec">${UI.icon('path')} Route aufzeichnen</button>`,
        });
        document.getElementById('rk-empty-rec')?.addEventListener('click', () => {
          App.navigate('map');
          setTimeout(() => window.Page_map?.startRecording?.(), 600);
        });
      }
      return;
    }
    // Alte Mini-Maps zerstören bevor DOM neu geschrieben wird
    _miniMaps.forEach(m => m.remove());
    _miniMaps.clear();

    grid.innerHTML = _filtered.map(r => _cardHTML(r)).join('');
    _initMiniMaps();
    grid.querySelectorAll('.rk-card').forEach(card => {
      card.addEventListener('click', e => {
        if (e.target.closest('.rk-stars,.rk-dl-btn')) return;
        _openDetail(parseInt(card.dataset.id));
      });
    });
    grid.querySelectorAll('.rk-star').forEach(star => {
      star.addEventListener('click', e => {
        e.stopPropagation();
        _rateRoute(parseInt(star.dataset.id), parseFloat(star.dataset.val));
      });
    });
    grid.querySelectorAll('.rk-dl-btn').forEach(btn => {
      btn.addEventListener('click', e => {
        e.stopPropagation();
        _downloadGpx(parseInt(btn.dataset.id));
      });
    });
  }

  // ----------------------------------------------------------
  // Karte HTML
  // ----------------------------------------------------------
  function _cardHTML(r) {
    const isDiscover = _browseMode === 'discover';
    const privBadge = !r.is_public ? `<span class="rk-badge rk-badge--private">${UI.icon('lock')} Privat</span>` : '';
    const diffLabel = DIFFICULTY_LABEL[r.schwierigkeit] || '';
    const terrain   = TERRAIN_LABEL[r.untergrund] || '';
    const paws      = HUNDE_LABEL[r.hunde_tauglichkeit] || '';
    const dist      = r.distanz_km ? `${r.distanz_km.toFixed(1)} km` : '';
    const dur       = r.dauer_min  ? _fmtDur(r.dauer_min) : '';
    const firstPhoto = (r.foto_urls || [])[0];
    const previewContent = firstPhoto
      ? `<img src="${UI.escape(firstPhoto)}" style="width:100%;height:100%;object-fit:cover">`
      : `<div class="rk-mini-map" data-id="${r.id}"
              data-track='${JSON.stringify(r.preview_track||[])}'
              style="width:100%;height:100%"></div>`;

    const authorLine = isDiscover
      ? `<div class="rk-card-creator">${UI.icon('user')} ${UI.escape(r.user_name||'Anonym')}</div>`
      : '';

    return `
      <div class="rk-card" data-id="${r.id}">
        <div class="rk-card-preview">${previewContent}</div>
        <div class="rk-card-body">
          ${authorLine}
          <div class="rk-card-name">${UI.escape(r.name)}</div>
          <div class="rk-card-stats">
            ${dist ? `<span>${UI.icon('map-trifold')} ${dist}</span>` : ''}
            ${dur  ? `<span>${UI.icon('timer')} ${dur}</span>`   : ''}
            ${terrain ? `<span>${terrain}</span>` : ''}
            ${paws    ? `<span title="Hundetauglichkeit">${paws}</span>` : ''}
          </div>
          <div class="rk-card-tags">
            ${isDiscover ? '' : privBadge}
            ${diffLabel ? `<span class="rk-badge rk-badge--${r.schwierigkeit}">${diffLabel}</span>` : ''}
            ${r.schatten        ? `<span class="rk-badge">${UI.icon('tree')} Schatten</span>`   : ''}
            ${r.leine_empfohlen ? `<span class="rk-badge">${UI.icon('link')} Leine</span>`      : ''}
          </div>
          <div class="rk-card-footer">
            <div class="rk-stars">${_starsHTML(r.id, r.bewertung||0, r.anz_bewertungen||0)}</div>
            <div class="rk-card-actions">
              ${isDiscover ? '' : `<span class="rk-card-author">${UI.escape(r.user_name||'Anonym')}</span>`}
              <button class="rk-dl-btn" data-id="${r.id}">${UI.icon('download-simple')} GPX</button>
            </div>
          </div>
        </div>
      </div>`;
  }

  function _starsHTML(id, avg, count) {
    const stars = [1,2,3,4,5].map(n =>
      `<span class="rk-star${n<=Math.round(avg)?' filled':''}" data-id="${id}" data-val="${n}">★</span>`
    ).join('');
    return stars + (count > 0 ? `<span class="rk-star-count">${avg.toFixed(1)} (${count})</span>` : '');
  }

  // ----------------------------------------------------------
  // Mini-Karten (OSM-Tiles via Leaflet, lazy per IntersectionObserver)
  // ----------------------------------------------------------
  function _initMiniMaps() {
    const init = () => {
      const obs = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
          if (!entry.isIntersecting) return;
          obs.unobserve(entry.target);
          _buildMiniMap(entry.target);
        });
      }, { rootMargin: '150px' });
      document.querySelectorAll('.rk-mini-map').forEach(el => obs.observe(el));
    };

    if (window.L) { init(); return; }
    // Leaflet noch am Laden — kurz pollen
    let tries = 0;
    const poll = setInterval(() => {
      if (window.L || ++tries > 30) { clearInterval(poll); if (window.L) init(); }
    }, 100);
  }

  function _buildMiniMap(el) {
    const track = JSON.parse(el.dataset.track || '[]');
    const routeId = parseInt(el.dataset.id);
    if (track.length < 2) {
      el.innerHTML = '<div class="rk-preview-empty">🗺️</div>';
      return;
    }
    const lls = track.map(p => [p.lat, p.lon]);
    const m = L.map(el, {
      zoomControl: false, attributionControl: false,
      dragging: false, touchZoom: false, scrollWheelZoom: false,
      doubleClickZoom: false, keyboard: false, boxZoom: false,
    });
    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { maxZoom: 17 }).addTo(m);
    const poly = L.polyline(lls, { color: '#C4843A', weight: 3, opacity: 0.9 }).addTo(m);
    L.circleMarker(lls[0],      { radius: 5, color: '#22C55E', fillColor: '#22C55E', fillOpacity: 1, weight: 1.5 }).addTo(m);
    L.circleMarker(lls.at(-1),  { radius: 5, color: '#EF4444', fillColor: '#EF4444', fillOpacity: 1, weight: 1.5 }).addTo(m);
    m.fitBounds(poly.getBounds(), { padding: [8, 8] });
    _miniMaps.set(routeId, m);
  }

  // ----------------------------------------------------------
  // SVG-Vorschau (Fallback, wird nicht mehr direkt genutzt)
  // ----------------------------------------------------------
  function _svgPreview(track) {
    if (!track || track.length < 2)
      return `<div class="rk-preview-empty">🗺️</div>`;
    const lats = track.map(p=>p.lat), lons = track.map(p=>p.lon);
    const minLat=Math.min(...lats), maxLat=Math.max(...lats);
    const minLon=Math.min(...lons), maxLon=Math.max(...lons);
    const latR=maxLat-minLat||0.0001, lonR=maxLon-minLon||0.0001;
    const W=200,H=120,PAD=10;
    const pts = track.map(p=>{
      const x=(PAD+(p.lon-minLon)/lonR*(W-2*PAD)).toFixed(1);
      const y=(H-PAD-(p.lat-minLat)/latR*(H-2*PAD)).toFixed(1);
      return `${x},${y}`;
    }).join(' ');
    const [sx,sy]=pts.split(' ')[0].split(',');
    const [ex,ey]=pts.split(' ').at(-1).split(',');
    return `<svg viewBox="0 0 ${W} ${H}" xmlns="http://www.w3.org/2000/svg" style="width:100%;height:100%;display:block">
      <rect width="${W}" height="${H}" fill="#e8f0e8"/>
      <polyline points="${pts}" fill="none" stroke="#C4843A" stroke-width="3"
                stroke-linecap="round" stroke-linejoin="round" opacity="0.9"/>
      <circle cx="${sx}" cy="${sy}" r="5" fill="#22C55E" stroke="#fff" stroke-width="1.5"/>
      <circle cx="${ex}" cy="${ey}" r="5" fill="#EF4444" stroke="#fff" stroke-width="1.5"/>
    </svg>`;
  }

  // ----------------------------------------------------------
  // Detail-Modal
  // ----------------------------------------------------------
  async function _openDetail(routeId) {
    let route;
    try { route = await API.routes.get(routeId); }
    catch (err) { UI.toast.error(err.message); return; }

    const isOwn  = _appState.user?.id === route.user_id;
    const track  = route.gps_track || [];
    const photos = route.foto_urls || [];
    const paws   = HUNDE_LABEL[route.hunde_tauglichkeit] || '';

    const photoGallery = photos.length ? `
      <div class="rk-photo-gallery">
        ${photos.map(u => `<img src="${UI.escape(u)}" class="rk-photo-thumb" onclick="window.open('${UI.escape(u)}','_blank')">`).join('')}
        ${isOwn ? `<label class="rk-photo-add" title="Foto hinzufügen">
          <span>+</span>
          <input type="file" id="rk-photo-input" accept="image/*" style="display:none">
        </label>` : ''}
      </div>` :
      isOwn ? `<label class="rk-photo-add-empty">
        ${UI.icon('camera')} Foto hinzufügen
        <input type="file" id="rk-photo-input" accept="image/*" style="display:none">
      </label>` : '';

    const body = `
      <div id="rk-detail-map" style="height:200px;border-radius:var(--radius-md);
           margin-bottom:var(--space-3);background:var(--c-surface-2)"></div>
      ${photoGallery}
      <div style="display:flex;flex-wrap:wrap;gap:var(--space-2);margin:var(--space-3) 0">
        ${route.distanz_km ? `<span class="rk-badge rk-badge--info">${UI.icon('map-trifold')} ${route.distanz_km.toFixed(2)} km</span>` : ''}
        ${route.dauer_min  ? `<span class="rk-badge rk-badge--info">${UI.icon('timer')} ${_fmtDur(route.dauer_min)}</span>` : ''}
        ${route.schwierigkeit ? `<span class="rk-badge rk-badge--${route.schwierigkeit}">${DIFFICULTY_LABEL[route.schwierigkeit]||route.schwierigkeit}</span>` : ''}
        ${route.untergrund ? `<span class="rk-badge">${TERRAIN_LABEL[route.untergrund]||route.untergrund}</span>` : ''}
        ${paws ? `<span class="rk-badge rk-badge--dog" title="Hundetauglichkeit">${paws}</span>` : ''}
        ${route.schatten        ? `<span class="rk-badge">${UI.icon('tree')} Schatten</span>`         : ''}
        ${route.leine_empfohlen ? `<span class="rk-badge">${UI.icon('link')} Leine empfohlen</span>` : ''}
        ${!route.is_public ? `<span class="rk-badge rk-badge--private">${UI.icon('lock')} Privat</span>` : ''}
      </div>
      ${route.beschreibung ? `<p style="color:var(--c-text-secondary);margin-bottom:var(--space-3)">${UI.escape(route.beschreibung)}</p>` : ''}
      <div id="rk-nearby" class="rk-nearby-section">
        <div style="color:var(--c-text-muted);font-size:var(--text-sm)">Lädt Orte entlang der Route…</div>
      </div>
      <div id="rk-rating-${route.id}"></div>
      <p style="color:var(--c-text-muted);font-size:0.75rem;margin-top:var(--space-2)">
        ${track.length} GPS-Punkte · von ${UI.escape(route.user_name||'Anonym')}
      </p>
    `;

    const footer = `
      <div style="display:flex;flex-direction:column;gap:var(--space-2);width:100%">
        <div style="display:flex;gap:var(--space-2);align-items:center">
          <button type="button" class="btn btn-secondary btn-sm" id="rd-gpx" title="GPX herunterladen">${UI.icon('download-simple')} GPX</button>
          <button type="button" class="btn btn-secondary btn-sm" id="rd-share" title="Route teilen">${UI.icon('arrow-square-out')} Teilen</button>
          <button type="button" class="btn btn-secondary btn-sm" id="rd-navi" title="Navigation">${UI.icon('map-pin')} Navi</button>
          <button type="button" class="forum-icon-btn" id="rd-send-friend" title="An Freund senden">${UI.icon('chat-circle-dots')}</button>
          ${isOwn ? `
            <div style="margin-left:auto;display:flex;gap:var(--space-1);align-items:center">
              <button type="button" class="btn btn-secondary btn-sm" id="rd-vis" title="${route.is_public ? 'Privat schalten' : 'Öffentlich schalten'}">
                ${route.is_public ? UI.icon('lock') : UI.icon('globe')}
              </button>
              <button type="button" class="forum-icon-btn forum-icon-btn--danger" id="rd-del" title="Route löschen">${UI.icon('trash')}</button>
            </div>
          ` : ''}
        </div>
        <button type="button" class="btn btn-primary w-full" id="rd-close">Schließen</button>
      </div>
    `;

    UI.modal.open({ title: `🥾 ${UI.escape(route.name)}`, body, footer });

    UI.ratingStars({
      containerId: `rk-rating-${route.id}`,
      targetType:  'route',
      targetId:    route.id,
      isLoggedIn:  !!_appState.user,
    });

    document.getElementById('rd-close')?.addEventListener('click', UI.modal.close);
    document.getElementById('rd-gpx')?.addEventListener('click', () => _downloadGpxDirect(route));

    // Teilen-Button
    document.getElementById('rd-share')?.addEventListener('click', async () => {
      const shareUrl = location.origin + '/#routes?id=' + route.id;
      const text = `${route.name} — ${(route.distanz_km||0).toFixed(1)} km`;
      if (navigator.share) {
        navigator.share({ title: route.name, text, url: shareUrl }).catch(() => {});
      } else {
        await navigator.clipboard.writeText(shareUrl);
        UI.toast.info('Link kopiert!');
      }
    });

    // Navi-Button
    document.getElementById('rd-navi')?.addEventListener('click', () => {
      const track = route.gps_track || [];
      if (track.length < 2) { UI.toast.warning('Keine GPS-Daten vorhanden.'); return; }
      const start = track[0];
      const end   = track[track.length - 1];
      const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent);
      const url = isIOS
        ? `maps://maps.apple.com/?saddr=${start.lat},${start.lon}&daddr=${end.lat},${end.lon}&dirflg=w`
        : `https://www.google.com/maps/dir/?api=1&origin=${start.lat},${start.lon}&destination=${end.lat},${end.lon}&travelmode=walking`;
      window.open(url, '_blank');
    });

    // An Freund senden
    document.getElementById('rd-send-friend')?.addEventListener('click', () => _openSendToFriendModal(route));

    // Sichtbarkeit toggle
    document.getElementById('rd-vis')?.addEventListener('click', async () => {
      try {
        await API.routes.update(route.id, { is_public: !route.is_public });
        route.is_public = !route.is_public;
        const btn = document.getElementById('rd-vis');
        if (btn) btn.innerHTML = route.is_public ? UI.icon('lock')+' Privat' : UI.icon('globe')+' Öffentlich';
        const r = _data.find(x => x.id === route.id);
        if (r) r.is_public = route.is_public;
        _applyFilter();
        UI.toast.success(route.is_public ? 'Route ist jetzt öffentlich.' : 'Route ist jetzt privat.');
      } catch (err) { UI.toast.error(err.message); }
    });

    // Löschen
    document.getElementById('rd-del')?.addEventListener('click', async () => {
      const ok = await UI.modal.confirm({
        title: 'Route löschen?', message: `„${route.name}" wird dauerhaft entfernt.`,
        confirmText: 'Löschen', danger: true,
      });
      if (!ok) return;
      try {
        await API.routes.delete(route.id);
        _data = _data.filter(r => r.id !== route.id);
        UI.modal.close();
        _applyFilter();
        UI.toast.success('Route gelöscht.');
      } catch (err) { UI.toast.error(err.message); }
    });

    // Foto-Upload
    document.getElementById('rk-photo-input')?.addEventListener('change', async e => {
      const file = e.target.files?.[0];
      if (!file) return;
      try {
        const res = await API.routes.addPhoto(route.id, file);
        route.foto_urls = res.foto_urls;
        UI.toast.success('Foto gespeichert!');
        // Reload detail
        UI.modal.close();
        setTimeout(() => _openDetail(route.id), 200);
      } catch (err) { UI.toast.error(err.message); }
    });

    // Mini-Map
    setTimeout(() => {
      const el = document.getElementById('rk-detail-map');
      if (!el || !track.length) return;
      if (window.L) _buildDetailMap(el, track);
    }, 80);

    // Nearby POIs laden
    if (track.length >= 2) {
      _loadNearbyPois(track).then(pois => _renderNearby(pois));
    } else {
      const nb = document.getElementById('rk-nearby');
      if (nb) nb.innerHTML = '';
    }
  }

  function _buildDetailMap(el, track) {
    const m = L.map(el, { zoomControl: false, attributionControl: false });
    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { maxZoom: 19 }).addTo(m);
    const lls  = track.map(p => [p.lat, p.lon]);
    const poly = L.polyline(lls, { color: '#C4843A', weight: 4, opacity: 0.85 }).addTo(m);
    L.circleMarker(lls[0],     { radius:7, color:'#22C55E', fillColor:'#22C55E', fillOpacity:1 }).addTo(m);
    L.circleMarker(lls.at(-1), { radius:7, color:'#EF4444', fillColor:'#EF4444', fillOpacity:1 }).addTo(m);
    m.fitBounds(poly.getBounds(), { padding:[10,10] });
  }

  // ----------------------------------------------------------
  // Nearby POIs
  // ----------------------------------------------------------

  // Gibt true zurück wenn poi.lat/lon innerhalb maxMeters eines Track-Punkts liegt
  function _isNearTrack(poi, track, maxMeters) {
    const R = 6371000;
    const plat = poi.lat * Math.PI / 180;
    const plon = poi.lon * Math.PI / 180;
    for (const pt of track) {
      const dlat = plat - pt.lat * Math.PI / 180;
      const dlon = plon - pt.lon * Math.PI / 180;
      const a = dlat*dlat + Math.cos(plat) * Math.cos(pt.lat * Math.PI/180) * dlon*dlon;
      if (R * Math.sqrt(a) <= maxMeters) return true;
    }
    return false;
  }

  async function _loadNearbyPois(track) {
    const lats = track.map(p => p.lat), lons = track.map(p => p.lon);
    const south = Math.min(...lats), north = Math.max(...lats);
    const west  = Math.min(...lons), east  = Math.max(...lons);
    // Bbox-Padding zum Abrufen (ca. 150m) — echte Distanzfilterung danach
    const pad = 0.0015;
    const bbox = { south: south-pad, north: north+pad, west: west-pad, east: east+pad };

    const results = [];
    await Promise.all(NEARBY_TYPES.map(async ({ type, icon, label }) => {
      try {
        const params = new URLSearchParams({ type, fast: 'true', ...bbox });
        const pois = await fetch(`/api/osm/pois?${params}`).then(r => r.json());
        pois
          .filter(p => _isNearTrack(p, track, 100)) // max 100m vom Track-Verlauf
          .forEach(p => results.push({ ...p, _icon: icon, _label: label }));
      } catch {}
    }));
    return results;
  }

  function _renderNearby(pois) {
    const el = document.getElementById('rk-nearby');
    if (!el) return;
    if (!pois.length) { el.innerHTML = ''; return; }

    // Gruppieren nach Typ
    const byType = {};
    pois.forEach(p => {
      const key = p._label;
      if (!byType[key]) byType[key] = { icon: p._icon, label: key, items: [] };
      byType[key].items.push(p);
    });

    el.innerHTML = `
      <div class="rk-nearby-title">${UI.icon('map-pin')} Entlang der Route</div>
      ${Object.values(byType).map(group => `
        <div class="rk-nearby-group">
          <div class="rk-nearby-group-label">${group.icon} ${UI.escape(group.label)} (${group.items.length})</div>
          ${group.items.slice(0, 5).map(p => `
            <div class="rk-nearby-item">
              <span class="rk-nearby-name">${UI.escape(p.name || group.label)}</span>
              ${p.opening_hours ? `<span class="rk-nearby-detail">${UI.icon('clock')} ${UI.escape(p.opening_hours)}</span>` : ''}
              ${p.phone         ? `<a href="tel:${UI.escape(p.phone)}" class="rk-nearby-detail rk-nearby-phone">${UI.icon('phone')} ${UI.escape(p.phone)}</a>` : ''}
            </div>
          `).join('')}
          ${group.items.length > 5 ? `<div style="font-size:var(--text-xs);color:var(--c-text-muted);padding:2px 0">+${group.items.length-5} weitere</div>` : ''}
        </div>
      `).join('')}
    `;
  }

  // ----------------------------------------------------------
  // Bewerten
  // ----------------------------------------------------------
  async function _rateRoute(id, wertung) {
    try {
      const res = await API.routes.rate(id, wertung);
      const r = _data.find(x => x.id === id);
      if (r) { r.bewertung = res.bewertung; r.anz_bewertungen = res.anz_bewertungen; }
      _applyFilter();
      UI.toast.success(`Bewertet: ${wertung} ★`);
    } catch (err) { UI.toast.error(err.message || 'Fehler beim Bewerten.'); }
  }

  // ----------------------------------------------------------
  // GPX
  // ----------------------------------------------------------
  async function _downloadGpx(id) {
    try {
      const route = await API.routes.get(id);
      _downloadGpxDirect(route);
    } catch (err) { UI.toast.error(err.message); }
  }

  function _downloadGpxDirect(route) {
    const track = route.gps_track || [];
    if (!track.length) { UI.toast.warning('Keine GPS-Daten.'); return; }
    const pts = track.map(p => `      <trkpt lat="${p.lat}" lon="${p.lon}"></trkpt>`).join('\n');
    const gpx = `<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.1" creator="Ban Yaro" xmlns="http://www.topografix.com/GPX/1/1">
  <trk><name>${UI.escape(route.name)}</name><trkseg>\n${pts}\n  </trkseg></trk>
</gpx>`;
    const blob = new Blob([gpx], { type: 'application/gpx+xml' });
    const url  = URL.createObjectURL(blob);
    const a    = document.createElement('a');
    a.href = url;
    a.download = `${route.name.replace(/[^a-z0-9äöü]/gi,'_')}.gpx`;
    a.click();
    URL.revokeObjectURL(url);
    UI.toast.success('GPX heruntergeladen!');
  }

  function _fmtDur(min) {
    if (min < 60) return `${min} min`;
    return `${Math.floor(min/60)}h ${min%60?(min%60)+'min':''}`.trim();
  }

  // ----------------------------------------------------------
  // Import: GPX / KML / TCX
  // ----------------------------------------------------------
  async function _importFile(file) {
    const text = await file.text();
    const ext  = file.name.split('.').pop().toLowerCase();
    let parsed;
    try {
      if (ext === 'gpx')       parsed = _parseGpx(text, file.name);
      else if (ext === 'kml')  parsed = _parseKml(text, file.name);
      else if (ext === 'tcx')  parsed = _parseTcx(text, file.name);
      else { UI.toast.error('Format nicht unterstützt. Bitte GPX, KML oder TCX.'); return; }
    } catch (err) {
      UI.toast.error(`Datei konnte nicht gelesen werden: ${err.message}`);
      return;
    }
    if (!parsed || parsed.track.length < 2) {
      UI.toast.error('Keine GPS-Punkte in der Datei gefunden.');
      return;
    }
    _openImportModal(parsed);
  }

  function _parseGpx(text, filename) {
    const doc    = new DOMParser().parseFromString(text, 'application/xml');
    const ns     = doc.documentElement.getAttribute('xmlns') || '';
    const resolve = tag => {
      // Namespace-aware oder fallback
      const els = doc.getElementsByTagNameNS(ns, tag);
      return els.length ? els : doc.getElementsByTagName(tag);
    };

    // Track-Punkte aus <trkpt>
    const trkpts = resolve('trkpt');
    const track  = [];
    let startTime = null, endTime = null;

    for (const pt of trkpts) {
      const lat = parseFloat(pt.getAttribute('lat'));
      const lon = parseFloat(pt.getAttribute('lon'));
      if (isNaN(lat) || isNaN(lon)) continue;
      const point = { lat, lon };

      // Elevation (optional)
      const eleEl = pt.getElementsByTagName('ele')[0] || pt.getElementsByTagNameNS(ns,'ele')[0];
      if (eleEl) point.ele = parseFloat(eleEl.textContent);

      // Timestamp (optional)
      const timeEl = pt.getElementsByTagName('time')[0] || pt.getElementsByTagNameNS(ns,'time')[0];
      if (timeEl) {
        const t = new Date(timeEl.textContent);
        if (!startTime) startTime = t;
        endTime = t;
      }
      track.push(point);
    }

    // Falls keine <trkpt> → Route-Punkte <rtept> versuchen
    if (!track.length) {
      const rtepts = resolve('rtept');
      for (const pt of rtepts) {
        const lat = parseFloat(pt.getAttribute('lat'));
        const lon = parseFloat(pt.getAttribute('lon'));
        if (!isNaN(lat) && !isNaN(lon)) track.push({ lat, lon });
      }
    }

    // Name aus Datei
    const nameEl = resolve('name')[0];
    const name   = nameEl?.textContent?.trim() ||
                   filename.replace(/\.gpx$/i, '').replace(/_/g,' ');

    const dauer_min = (startTime && endTime)
      ? Math.round((endTime - startTime) / 60000) : null;

    return { track, name, dauer_min, source: 'GPX' };
  }

  function _parseKml(text, filename) {
    const doc   = new DOMParser().parseFromString(text, 'application/xml');
    const track = [];

    // <coordinates> enthält "lon,lat,ele lon,lat,ele …" oder newline-getrennt
    const coordEls = doc.getElementsByTagName('coordinates');
    for (const el of coordEls) {
      const raw = el.textContent.trim().replace(/\n/g, ' ');
      for (const tuple of raw.split(/\s+/)) {
        const parts = tuple.split(',');
        if (parts.length >= 2) {
          const lon = parseFloat(parts[0]);
          const lat = parseFloat(parts[1]);
          if (!isNaN(lat) && !isNaN(lon)) {
            const point = { lat, lon };
            if (parts[2]) point.ele = parseFloat(parts[2]);
            track.push(point);
          }
        }
      }
    }

    const nameEl = doc.getElementsByTagName('name')[0];
    const name   = nameEl?.textContent?.trim() ||
                   filename.replace(/\.kml$/i, '').replace(/_/g,' ');

    return { track, name, dauer_min: null, source: 'KML' };
  }

  function _parseTcx(text, filename) {
    const doc    = new DOMParser().parseFromString(text, 'application/xml');
    const track  = [];
    let startTime = null, endTime = null;

    const trackpoints = doc.getElementsByTagName('Trackpoint');
    for (const tp of trackpoints) {
      const latEl = tp.getElementsByTagName('LatitudeDegrees')[0];
      const lonEl = tp.getElementsByTagName('LongitudeDegrees')[0];
      if (!latEl || !lonEl) continue;
      const lat = parseFloat(latEl.textContent);
      const lon = parseFloat(lonEl.textContent);
      if (isNaN(lat) || isNaN(lon)) continue;

      const point = { lat, lon };
      const altEl = tp.getElementsByTagName('AltitudeMeters')[0];
      if (altEl) point.ele = parseFloat(altEl.textContent);

      const timeEl = tp.getElementsByTagName('Time')[0];
      if (timeEl) {
        const t = new Date(timeEl.textContent);
        if (!startTime) startTime = t;
        endTime = t;
      }
      track.push(point);
    }

    const nameEl = doc.getElementsByTagName('Name')[0];
    const name   = nameEl?.textContent?.trim() ||
                   filename.replace(/\.tcx$/i, '').replace(/_/g,' ');

    const dauer_min = (startTime && endTime)
      ? Math.round((endTime - startTime) / 60000) : null;

    return { track, name, dauer_min, source: 'TCX' };
  }

  // Haversine (client-seitig für Import-Stats)
  function _calcDistance(track) {
    const R2RAD = Math.PI / 180;
    let dist = 0;
    for (let i = 1; i < track.length; i++) {
      const a = track[i-1], b = track[i];
      const dlat = (b.lat - a.lat) * R2RAD;
      const dlon = (b.lon - a.lon) * R2RAD;
      const sin2 = Math.sin(dlat/2)**2 +
                   Math.cos(a.lat*R2RAD)*Math.cos(b.lat*R2RAD)*Math.sin(dlon/2)**2;
      dist += 2 * 6371000 * Math.asin(Math.sqrt(sin2));
    }
    return dist / 1000; // km
  }

  // ----------------------------------------------------------
  // Import-Modal
  // ----------------------------------------------------------
  function _openImportModal(parsed) {
    const { track, name, dauer_min, source } = parsed;
    const distanz_km = _calcDistance(track);
    const preview    = _svgPreview(_simplifyPreview(track, 60));

    const body = `
      <div class="rk-import-preview">${preview}</div>
      <div class="rk-import-stats">
        <span>${UI.icon('map-pin')} ${track.length} Punkte</span>
        <span>${UI.icon('map-trifold')} ${distanz_km.toFixed(2)} km</span>
        ${dauer_min ? `<span>${UI.icon('timer')} ${_fmtDur(dauer_min)}</span>` : ''}
        <span class="rk-badge rk-badge--info">${source}</span>
      </div>
      <form id="rk-import-form" style="display:flex;flex-direction:column;gap:var(--space-3);margin-top:var(--space-4)">
        <div class="form-group">
          <label class="form-label">Name *</label>
          <input class="form-input" id="ri-name" value="${UI.escape(name)}" required maxlength="120">
        </div>
        <div class="form-group">
          <label class="form-label">Beschreibung</label>
          <textarea class="form-input" id="ri-desc" rows="2" placeholder="Kurze Beschreibung der Route…"></textarea>
        </div>
        <div style="display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)">
          <div class="form-group">
            <label class="form-label">Schwierigkeit</label>
            <select class="form-input" id="ri-diff">
              <option value="leicht">🟢 Leicht</option>
              <option value="mittel">🟡 Mittel</option>
              <option value="anspruchsvoll">🔴 Anspruchsvoll</option>
            </select>
          </div>
          <div class="form-group">
            <label class="form-label">Untergrund</label>
            <select class="form-input" id="ri-terrain">
              <option value="">– wählen –</option>
              <option value="wald">🌲 Wald</option>
              <option value="asphalt">🛣️ Asphalt</option>
              <option value="wiese">🌿 Wiese</option>
              <option value="mix">🔀 Mix</option>
            </select>
          </div>
        </div>
        <div class="form-group">
          <label class="form-label">Hundetauglichkeit</label>
          <div class="rk-paw-selector" id="ri-paws">
            <button type="button" class="rk-paw-btn" data-val="eingeschränkt">🐾 Eingeschränkt</button>
            <button type="button" class="rk-paw-btn" data-val="gut">🐾🐾 Gut</button>
            <button type="button" class="rk-paw-btn active" data-val="sehr_gut">🐾🐾🐾 Sehr gut</button>
            <button type="button" class="rk-paw-btn" data-val="premium">🐾🐾🐾🐾 Premium</button>
          </div>
        </div>
        <div style="display:flex;gap:var(--space-4)">
          <label style="display:flex;align-items:center;gap:var(--space-2);cursor:pointer">
            <input type="checkbox" id="ri-leine"> Leine empfohlen
          </label>
          <label style="display:flex;align-items:center;gap:var(--space-2);cursor:pointer">
            <input type="checkbox" id="ri-schatten"> Viel Schatten
          </label>
          <label style="display:flex;align-items:center;gap:var(--space-2);cursor:pointer">
            <input type="checkbox" id="ri-public"> Öffentlich
            ${UI.help('Öffentliche Routen können von allen Nutzern in der Entdecken-Ansicht gefunden werden.')}
          </label>
        </div>
      </form>
    `;

    const footer = `
      <button type="button" class="btn btn-ghost" id="ri-cancel">Abbrechen</button>
      <button type="button" class="btn btn-primary flex-1" id="ri-save">${UI.icon('floppy-disk')} Route speichern</button>
    `;

    UI.modal.open({ title: '📥 Route importieren', body, footer });

    document.getElementById('ri-cancel')?.addEventListener('click', UI.modal.close);

    // Paw-Selector
    let _selPaw = 'sehr_gut';
    document.getElementById('ri-paws')?.addEventListener('click', e => {
      const btn = e.target.closest('.rk-paw-btn');
      if (!btn) return;
      document.querySelectorAll('#ri-paws .rk-paw-btn').forEach(b => b.classList.remove('active'));
      btn.classList.add('active');
      _selPaw = btn.dataset.val;
    });

    document.getElementById('ri-save')?.addEventListener('click', async () => {
      const nameVal = document.getElementById('ri-name')?.value.trim();
      if (!nameVal) { UI.toast.error('Bitte einen Namen eingeben.'); return; }

      const saveBtn = document.getElementById('ri-save');
      saveBtn.disabled = true;
      saveBtn.textContent = 'Speichert…';

      try {
        // Track auf max 2000 Punkte reduzieren (API-Limit / Performance)
        const reducedTrack = _simplifyPreview(track, 2000);
        await API.routes.create({
          name:            nameVal,
          beschreibung:    document.getElementById('ri-desc')?.value.trim() || null,
          gps_track:       reducedTrack,
          distanz_km:      Math.round(distanz_km * 100) / 100,
          dauer_min:       dauer_min || null,
          schwierigkeit:   document.getElementById('ri-diff')?.value  || 'leicht',
          untergrund:      document.getElementById('ri-terrain')?.value || null,
          schatten:        document.getElementById('ri-schatten')?.checked,
          leine_empfohlen: document.getElementById('ri-leine')?.checked,
          is_public:       document.getElementById('ri-public')?.checked,
          hunde_tauglichkeit: _selPaw,
        });
        UI.modal.close();
        UI.toast.success('Route importiert! 🥾');
        _loadData();
      } catch (err) {
        UI.toast.error(err.message || 'Fehler beim Speichern.');
        saveBtn.disabled = false;
        saveBtn.innerHTML = UI.icon('floppy-disk') + ' Route speichern';
      }
    });
  }

  function _simplifyPreview(track, maxPts) {
    if (track.length <= maxPts) return track;
    const step = track.length / maxPts;
    return Array.from({ length: maxPts }, (_, i) => track[Math.round(i * step)]);
  }

  // ----------------------------------------------------------
  // An Freund senden
  // ----------------------------------------------------------
  async function _openSendToFriendModal(route) {
    const shareUrl = location.origin + '/#routes?id=' + route.id;

    // Freunde laden
    let friends = [];
    try {
      friends = await API.friends.list();
    } catch (err) {
      UI.toast.error('Freunde konnten nicht geladen werden.');
      return;
    }

    if (!friends.length) {
      UI.toast.info('Du hast noch keine Freunde hinzugefügt.');
      return;
    }

    const friendRows = friends.map(f => {
      const initial = (f.name || '?')[0].toUpperCase();
      return `<div class="rk-friend-row" data-id="${f.id}" data-name="${UI.escape(f.name || 'Anonym')}"
                   style="display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3);
                          cursor:pointer;border-radius:var(--radius-md);transition:background .15s"
                   onmouseover="this.style.background='var(--c-surface-2)'"
                   onmouseout="this.style.background=''">
        <div style="width:36px;height:36px;border-radius:50%;background:var(--c-primary);
                    color:#fff;display:flex;align-items:center;justify-content:center;
                    font-weight:600;flex-shrink:0">${UI.escape(initial)}</div>
        <span>${UI.escape(f.name || 'Anonym')}</span>
      </div>`;
    }).join('');

    const body = `<div id="rk-friend-list">${friendRows}</div>`;
    const footer = `<button type="button" class="btn btn-ghost" id="rsf-cancel">Abbrechen</button>`;

    UI.modal.open({
      title: `${UI.icon('chat-circle-dots')} An Freund senden`,
      body,
      footer,
    });

    document.getElementById('rsf-cancel')?.addEventListener('click', UI.modal.close);

    document.getElementById('rk-friend-list')?.addEventListener('click', async e => {
      const row = e.target.closest('.rk-friend-row');
      if (!row) return;

      const partnerId = parseInt(row.dataset.id, 10);
      const partnerName = row.dataset.name;

      try {
        const conv = await API.chat.start(partnerId);
        const convId = conv.id;
        const text = `Ich habe eine Route für dich: ${route.name}\n${shareUrl}`;
        await API.chat.send(convId, text);
        UI.modal.close();
        UI.toast.success(`Gesendet an ${partnerName}`);
      } catch (err) {
        UI.toast.error('Senden fehlgeschlagen: ' + (err.message || 'Unbekannter Fehler'));
      }
    });
  }

  return { init, refresh, onDogChange };

})();