/**
 * Naturkatastrophen-Layer: NASA EONET (Waldbrände, Vulkane, Stürme, Eis).
 */
const DisastersLayer = {
    _viewer: null,
    _dataSource: null,
    _interval: null,
    _count: 0,

    start(viewer) {
        if (this._dataSource) return;
        this._viewer = viewer;
        this._dataSource = new Cesium.CustomDataSource('disasters');
        viewer.dataSources.add(this._dataSource);
        this._fetch();
        var self = this;
        this._interval = setInterval(function() { self._fetch(); }, 600000);
    },

    stop() {
        if (this._interval) { clearInterval(this._interval); this._interval = null; }
        if (this._dataSource && this._viewer) { this._viewer.dataSources.remove(this._dataSource); this._dataSource = null; }
        this._count = 0;
    },

    _fetch() {
        var self = this;
        var loadEl = document.getElementById('loading-disasters');
        var statusEl = document.getElementById('status-disasters');
        if (loadEl) loadEl.classList.add('active');
        if (statusEl) { statusEl.textContent = 'Lade Ereignisse...'; statusEl.classList.add('active'); }
        fetch('/api/disasters')
        .then(function(r) { return r.json(); })
        .then(function(data) {
            if (!self._dataSource) return;
            self._dataSource.entities.removeAll();
            var events = data.events || [];
            self._count = events.length;
            var icons = {
                'wildfires': { color: '#ff4400', symbol: '🔥', label: 'Waldbrand' },
                'volcanoes': { color: '#ff0000', symbol: '🌋', label: 'Vulkan' },
                'severeStorms': { color: '#aa44ff', symbol: '🌀', label: 'Sturm' },
                'floods': { color: '#4488ff', symbol: '🌊', label: 'Flut' },
                'earthquakes': { color: '#ffaa00', symbol: '⚡', label: 'Erdbeben' },
                'seaLakeIce': { color: '#88ddff', symbol: '❄️', label: 'Eis' },
                'landslides': { color: '#886644', symbol: '⛰️', label: 'Erdrutsch' },
            };
            events.forEach(function(evt) {
                var cats = evt.categories || [];
                var catId = cats.length ? cats[0].id : 'unknown';
                var icon = icons[catId] || { color: '#ffffff', symbol: '⚠️', label: catId };
                var geom = evt.geometry || [];
                if (!geom.length) return;
                var latest = geom[geom.length - 1];
                var coords = latest.coordinates;
                if (!coords || coords.length < 2) return;
                var lon = coords[0], lat = coords[1];

                self._dataSource.entities.add({
                    position: Cesium.Cartesian3.fromDegrees(lon, lat, 0),
                    point: {
                        pixelSize: 8,
                        color: Cesium.Color.fromCssColorString(icon.color),
                        outlineColor: Cesium.Color.fromCssColorString(icon.color).withAlpha(0.4),
                        outlineWidth: 3,
                        heightReference: Cesium.HeightReference.NONE,
                    },
                    label: {
                        text: icon.symbol,
                        font: '14px sans-serif',
                        pixelOffset: new Cesium.Cartesian2(0, -14),
                        distanceDisplayCondition: new Cesium.DistanceDisplayCondition(0, 5000000),
                    },
                    description: '<div style="font-family:monospace;font-size:13px;padding:8px">' +
                        '<strong style="color:' + icon.color + '">' + icon.label.toUpperCase() + '</strong><br>' +
                        '<span style="color:#e0e0e0">' + (evt.title || '?') + '</span><br>' +
                        '<span style="color:#888">Quellen: ' + (evt.sources || []).map(function(s) { return s.id; }).join(', ') + '</span>' +
                        '</div>',
                });
            });
            if (statusEl) statusEl.textContent = events.length + ' Ereignisse';
        })
        .catch(function(e) { console.warn('Disasters error:', e); if (statusEl) statusEl.textContent = 'Fehler'; })
        .finally(function() { if (loadEl) loadEl.classList.remove('active'); setTimeout(function() { if (statusEl) statusEl.classList.remove('active'); }, 5000); });
    },
};