/**
 * Katastrophen-Layer: NASA EONET + USGS Erdbeben kombiniert.
 */
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 Katastrophen + Erdbeben...'; statusEl.classList.add('active'); }

        Promise.all([
            fetch('/api/disasters').then(function(r) { return r.json(); }).catch(function() { return { events: [] }; }),
            fetch('/api/quakes').then(function(r) { return r.json(); }).catch(function() { return { features: [] }; })
        ])
        .then(function(results) {
            if (!self._dataSource) return;
            self._dataSource.entities.removeAll();
            var events = results[0].events || [];
            var quakes = results[1].features || [];
            self._renderEonet(events);
            self._renderQuakes(quakes);
            self._count = events.length + quakes.length;
            if (statusEl) statusEl.textContent = self._count + ' 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); });
    },

    _renderEonet(events) {
        var self = this;
        var icons = {
            'wildfires': { color: '#ff4400', label: 'Waldbrand' },
            'volcanoes': { color: '#ff0000', label: 'Vulkan' },
            'severeStorms': { color: '#aa44ff', label: 'Sturm' },
            'floods': { color: '#4488ff', label: 'Flut' },
            'earthquakes': { color: '#ffaa00', label: 'Erdbeben' },
            'seaLakeIce': { color: '#88ddff', label: 'Eis' },
            'landslides': { color: '#886644', label: 'Erdrutsch' },
        };
        events.forEach(function(evt) {
            var cats = evt.categories || [];
            var catId = cats.length ? cats[0].id : 'unknown';
            var icon = icons[catId] || { color: '#ffffff', 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;
            self._dataSource.entities.add({
                position: Cesium.Cartesian3.fromDegrees(coords[0], coords[1], 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.label,
                    font: '10px monospace',
                    fillColor: Cesium.Color.fromCssColorString(icon.color),
                    outlineColor: Cesium.Color.BLACK,
                    outlineWidth: 2,
                    style: Cesium.LabelStyle.FILL_AND_OUTLINE,
                    pixelOffset: new Cesium.Cartesian2(0, -14),
                    scale: 0.7,
                    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>',
            });
        });
    },

    _renderQuakes(features) {
        var self = this;
        var now = Date.now();
        features.forEach(function(f) {
            var c = f.geometry.coordinates;
            var p = f.properties;
            var mag = p.mag || 1;
            var ageH = (now - p.time) / 3600000;
            var color = ageH < 1 ? '#ff0000' : ageH < 6 ? '#ff6600' : ageH < 12 ? '#ffaa00' : '#ffdd00';
            self._dataSource.entities.add({
                position: Cesium.Cartesian3.fromDegrees(c[0], c[1], 0),
                point: {
                    pixelSize: Math.max(mag * 2.5, 4),
                    color: Cesium.Color.fromCssColorString(color),
                    outlineColor: Cesium.Color.fromCssColorString(color).withAlpha(0.4),
                    outlineWidth: 2,
                    heightReference: Cesium.HeightReference.NONE,
                },
                label: {
                    text: 'M' + mag.toFixed(1),
                    font: '10px monospace',
                    fillColor: Cesium.Color.fromCssColorString(color),
                    outlineColor: Cesium.Color.BLACK,
                    outlineWidth: 2,
                    style: Cesium.LabelStyle.FILL_AND_OUTLINE,
                    pixelOffset: new Cesium.Cartesian2(0, -12),
                    scale: 0.7,
                    distanceDisplayCondition: new Cesium.DistanceDisplayCondition(0, 2000000),
                },
                description: '<div style="font-family:monospace;font-size:13px;padding:8px">' +
                    '<strong style="color:' + color + '">ERDBEBEN M' + mag.toFixed(1) + '</strong><br>' +
                    '<span style="color:#e0e0e0">' + (p.place || '?') + '</span><br>' +
                    '<span style="color:#888">Tiefe: ' + (c[2] || '?') + ' km | ' +
                    new Date(p.time).toLocaleString('de-DE') + '</span></div>',
            });
        });
    },
};