const MilitaryLayer = {
    _viewer: null, _points: null, _labels: null, _interval: null, _count: 0, _data: [],
    _handler: null,

    start(viewer) {
        if (this._points) return;
        this._viewer = viewer;
        this._points = viewer.scene.primitives.add(new Cesium.PointPrimitiveCollection());
        this._labels = viewer.scene.primitives.add(new Cesium.LabelCollection());
        this._fetch();
        var self = this;
        this._interval = setInterval(function() { self._fetch(); }, 20000);
        this._handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
        this._handler.setInputAction(function(c) { self._onClick(c.position); }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
    },

    stop() {
        if (this._interval) { clearInterval(this._interval); this._interval = null; }
        if (this._handler) { this._handler.destroy(); this._handler = null; }
        if (this._points && this._viewer) { this._viewer.scene.primitives.remove(this._points); this._points = null; }
        if (this._labels && this._viewer) { this._viewer.scene.primitives.remove(this._labels); this._labels = null; }
        this._count = 0; this._data = [];
    },

    _onClick(pos) {
        if (!this._viewer || !this._data.length) return;
        var cart = this._viewer.scene.pickPosition(pos);
        if (!cart) { var ray = this._viewer.scene.camera.getPickRay(pos); cart = this._viewer.scene.globe.pick(ray, this._viewer.scene); }
        if (!cart) return;
        var c = Cesium.Cartographic.fromCartesian(cart);
        var lat = Cesium.Math.toDegrees(c.latitude), lon = Cesium.Math.toDegrees(c.longitude);
        var best = null, bd = 999;
        for (var i = 0; i < this._data.length; i++) {
            var a = this._data[i], d = Math.abs(a.lat-lat) + Math.abs(a.lon-lon);
            if (d < bd) { bd = d; best = a; }
        }
        if (best && bd < 1) {
            var cs = best.flight || best.reg || best.hex || '?';
            this._viewer.trackedEntity = undefined;
            this._viewer.selectedEntity = new Cesium.Entity({
                name: 'MIL: ' + cs,
                description: '<div style="font-family:monospace;font-size:13px;color:#ff4444;padding:8px">' +
                    '<strong>' + cs + '</strong><br>REG: ' + (best.reg||'?') + '<br>TYP: ' + (best.type||'?') +
                    '<br>ALT: ' + (best.alt_baro||'?') + ' ft<br>SPD: ' + (best.gs||'?') + ' kts' +
                    '<br>SQK: ' + (best.squawk||'?') + '</div>',
            });
        }
    },

    _fetch() {
        var self = this;
        var statusEl = document.getElementById('status-military');
        if (statusEl) { statusEl.textContent = 'Lade...'; statusEl.classList.add('active'); }
        fetch('/api/military')
        .then(function(r) { return r.json(); })
        .then(function(data) {
            self._data = data.ac || [];
            self._count = self._data.length;
            self._render();
            if (statusEl) statusEl.textContent = self._count + ' Militaer';
        })
        .catch(function() { if (statusEl) statusEl.textContent = 'Fehler'; })
        .finally(function() { setTimeout(function() { if (statusEl) statusEl.classList.remove('active'); }, 5000); });
    },

    _render() {
        if (!this._points) return;
        this._points.removeAll();
        this._labels.removeAll();
        var red = Cesium.Color.fromCssColorString('#ff2222');
        for (var i = 0; i < this._data.length; i++) {
            var a = this._data[i];
            var altM = (a.alt_baro || 10000) * 0.3048;
            this._points.add({ position: Cesium.Cartesian3.fromDegrees(a.lon, a.lat, altM), pixelSize: 8, color: red });
            var cs = a.flight || a.reg || '';
            if (cs) {
                this._labels.add({
                    position: Cesium.Cartesian3.fromDegrees(a.lon, a.lat, altM),
                    text: cs, font: '9px monospace',
                    fillColor: red.withAlpha(0.8), outlineColor: Cesium.Color.BLACK, outlineWidth: 2,
                    style: Cesium.LabelStyle.FILL_AND_OUTLINE,
                    pixelOffset: new Cesium.Cartesian2(6, -3), scale: 0.7,
                    distanceDisplayCondition: new Cesium.DistanceDisplayCondition(0, 1500000),
                });
            }
        }
    },
};