(function () {
    "use strict";

    // TODO: Add your ion access token from cesium.com/ion/
    // Cesium.Ion.defaultAccessToken = '<YOUR ACCESS TOKEN HERE>';

    //////////////////////////////////////////////////////////////////////////
    // Creating the Viewer
    //////////////////////////////////////////////////////////////////////////

    // var viewer = new Cesium.Viewer('cesiumContainer', {
    //     scene3DOnly: true,
    //     selectionIndicator: false,
    //     baseLayerPicker: false
    // });

    //////////////////////////////////////////////////////////////////////////
    // Loading Imagery
    //////////////////////////////////////////////////////////////////////////

    // // Remove default base layer
    // viewer.imageryLayers.remove(viewer.imageryLayers.get(0));

    // // Add Sentinel-2 imagery
    // viewer.imageryLayers.addImageryProvider(new Cesium.IonImageryProvider({ assetId: 3954 }));

    //////////////////////////////////////////////////////////////////////////
    // Loading Terrain
    //////////////////////////////////////////////////////////////////////////

    // // Load Cesium World Terrain
    // viewer.terrainProvider = Cesium.createWorldTerrain({
    //     requestWaterMask : true, // required for water effects
    //     requestVertexNormals : true // required for terrain lighting
    // });
    // // Enable depth testing so things behind the terrain disappear.
    // viewer.scene.globe.depthTestAgainstTerrain = true;

    //////////////////////////////////////////////////////////////////////////
    // Configuring the Scene
    //////////////////////////////////////////////////////////////////////////

    // // Enable lighting based on sun/moon positions
    // viewer.scene.globe.enableLighting = true;

    // // Create an initial camera view
    // var initialPosition = new Cesium.Cartesian3.fromDegrees(-73.998114468289017509, 40.674512895646692812, 2631.082799425431);
    // var initialOrientation = new Cesium.HeadingPitchRoll.fromDegrees(7.1077496389876024807, -31.987223091598949054, 0.025883251314954971306);
    // var homeCameraView = {
    //     destination : initialPosition,
    //     orientation : {
    //         heading : initialOrientation.heading,
    //         pitch : initialOrientation.pitch,
    //         roll : initialOrientation.roll
    //     }
    // };
    // // Set the initial view
    // viewer.scene.camera.setView(homeCameraView);

    // // Add some camera flight animation options
    // homeCameraView.duration = 2.0;
    // homeCameraView.maximumHeight = 2000;
    // homeCameraView.pitchAdjustHeight = 2000;
    // homeCameraView.endTransform = Cesium.Matrix4.IDENTITY;
    // // Override the default home button
    // viewer.homeButton.viewModel.command.beforeExecute.addEventListener(function (e) {
    //     e.cancel = true;
    //     viewer.scene.camera.flyTo(homeCameraView);
    // });

    // // Set up clock and timeline.
    // viewer.clock.shouldAnimate = true; // default
    // viewer.clock.startTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:00:00Z");
    // viewer.clock.stopTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:20:00Z");
    // viewer.clock.currentTime = Cesium.JulianDate.fromIso8601("2017-07-11T16:00:00Z");
    // viewer.clock.multiplier = 2; // sets a speedup
    // viewer.clock.clockStep = Cesium.ClockStep.SYSTEM_CLOCK_MULTIPLIER; // tick computation mode
    // viewer.clock.clockRange = Cesium.ClockRange.LOOP_STOP; // loop at the end
    // viewer.timeline.zoomTo(viewer.clock.startTime, viewer.clock.stopTime); // set visible range

    //////////////////////////////////////////////////////////////////////////
    // Loading and Styling Entity Data
    //////////////////////////////////////////////////////////////////////////

    // var kmlOptions = {
    //     camera : viewer.scene.camera,
    //     canvas : viewer.scene.canvas,
    //     clampToGround : true
    // };
    // // Load geocache points of interest from a KML file
    // // Data from : http://catalog.opendata.city/dataset/pediacities-nyc-neighborhoods/resource/91778048-3c58-449c-a3f9-365ed203e914
    // var geocachePromise = Cesium.KmlDataSource.load('./Source/SampleData/sampleGeocacheLocations.kml', kmlOptions);

    // // Add geocache billboard entities to scene and style them
    // geocachePromise.then(function(dataSource) {
    //     // Add the new data as entities to the viewer
    //     viewer.dataSources.add(dataSource);

    //     // Get the array of entities
    //     var geocacheEntities = dataSource.entities.values;

    //     for (var i = 0; i < geocacheEntities.length; i++) {
    //         var entity = geocacheEntities[i];
    //         if (Cesium.defined(entity.billboard)) {
    //             // Adjust the vertical origin so pins sit on terrain
    //             entity.billboard.verticalOrigin = Cesium.VerticalOrigin.BOTTOM;
    //             // Disable the labels to reduce clutter
    //             entity.label = undefined;
    //             // Add distance display condition
    //             entity.billboard.distanceDisplayCondition = new Cesium.DistanceDisplayCondition(10.0, 20000.0);
    //             // Compute latitude and longitude in degrees
    //             var cartographicPosition = Cesium.Cartographic.fromCartesian(entity.position.getValue(Cesium.JulianDate.now()));
    //             var latitude = Cesium.Math.toDegrees(cartographicPosition.latitude);
    //             var longitude = Cesium.Math.toDegrees(cartographicPosition.longitude);
    //             // Modify description
    //             var description = '<table class="cesium-infoBox-defaultTable cesium-infoBox-defaultTable-lighter"><tbody>' +
    //                 '<tr><th>' + "Longitude" + '</th><td>' + longitude.toFixed(5) + '</td></tr>' +
    //                 '<tr><th>' + "Latitude" + '</th><td>' + latitude.toFixed(5) + '</td></tr>' +
    //                 '</tbody></table>';
    //             entity.description = description;
    //         }
    //     }
    // });

    // var geojsonOptions = {
    //     clampToGround : true
    // };
    // // Load neighborhood boundaries from a GeoJson file
    // // Data from : https://data.cityofnewyork.us/City-Government/Neighborhood-Tabulation-Areas/cpf4-rkhq
    // var neighborhoodsPromise = Cesium.GeoJsonDataSource.load('./Source/SampleData/sampleNeighborhoods.geojson', geojsonOptions);

    // // Save an new entity collection of neighborhood data
    // var neighborhoods;
    // neighborhoodsPromise.then(function(dataSource) {
    //     // Add the new data as entities to the viewer
    //     viewer.dataSources.add(dataSource);
    //     neighborhoods = dataSource.entities;

    //     // Get the array of entities
    //     var neighborhoodEntities = dataSource.entities.values;
    //     for (var i = 0; i < neighborhoodEntities.length; i++) {
    //         var entity = neighborhoodEntities[i];

    //         if (Cesium.defined(entity.polygon)) {
    //             // Use kml neighborhood value as entity name
    //             entity.name = entity.properties.neighborhood;
    //             // Set the polygon material to a random, translucent color
    //             entity.polygon.material = Cesium.Color.fromRandom({
    //                 red : 0.1,
    //                 maximumGreen : 0.5,
    //                 minimumBlue : 0.5,
    //                 alpha : 0.6
    //             });
    //             // Tells the polygon to color the terrain. ClassificationType.CESIUM_3D_TILE will color the 3D tileset, and ClassificationType.BOTH will color both the 3d tiles and terrain (BOTH is the default)
    //             entity.polygon.classificationType = Cesium.ClassificationType.TERRAIN;
    //             // Generate Polygon center
    //             var polyPositions = entity.polygon.hierarchy.getValue(Cesium.JulianDate.now()).positions;
    //             var polyCenter = Cesium.BoundingSphere.fromPoints(polyPositions).center;
    //             polyCenter = Cesium.Ellipsoid.WGS84.scaleToGeodeticSurface(polyCenter);
    //             entity.position = polyCenter;
    //             // Generate labels
    //             entity.label = {
    //                 text : entity.name,
    //                 showBackground : true,
    //                 scale : 0.6,
    //                 horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
    //                 verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
    //                 distanceDisplayCondition : new Cesium.DistanceDisplayCondition(10.0, 8000.0),
    //                 disableDepthTestDistance : 100.0
    //             };
    //         }
    //     }
    // });

    // // Load a drone flight path from a CZML file
    // var dronePromise = Cesium.CzmlDataSource.load('./Source/SampleData/SampleFlight.czml');

    // // Save a new drone model entity
    // var drone;
    // dronePromise.then(function(dataSource) {
    //     viewer.dataSources.add(dataSource);
    //     // Get the entity using the id defined in the CZML data
    //     drone = dataSource.entities.getById('Aircraft/Aircraft1');
    //     // Attach a 3D model
    //     drone.model = {
    //         uri : './Source/SampleData/Models/CesiumDrone.gltf',
    //         minimumPixelSize : 128,
    //         maximumScale : 1000,
    //         silhouetteColor : Cesium.Color.WHITE,
    //         silhouetteSize : 2
    //     };
    //     // Add computed orientation based on sampled positions
    //     drone.orientation = new Cesium.VelocityOrientationProperty(drone.position);

    //     // Smooth path interpolation
    //     drone.position.setInterpolationOptions({
    //         interpolationAlgorithm : Cesium.HermitePolynomialApproximation,
    //         interpolationDegree : 2
    //     });
    //     drone.viewFrom = new Cesium.Cartesian3(-30, 0, 0);
    // });

    //////////////////////////////////////////////////////////////////////////
    // Load 3D Tileset
    //////////////////////////////////////////////////////////////////////////

    // // Load the NYC buildings tileset
    // var city = viewer.scene.primitives.add(new Cesium.Cesium3DTileset({ url: Cesium.IonResource.fromAssetId(3839) }));

    // // Adjust the tileset height so it's not floating above terrain
    // var heightOffset = -32;
    // city.readyPromise.then(function(tileset) {
    //     // Position tileset
    //     var boundingSphere = tileset.boundingSphere;
    //     var cartographic = Cesium.Cartographic.fromCartesian(boundingSphere.center);
    //     var surfacePosition = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 0.0);
    //     var offsetPosition = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, heightOffset);
    //     var translation = Cesium.Cartesian3.subtract(offsetPosition, surfacePosition, new Cesium.Cartesian3());
    //     tileset.modelMatrix = Cesium.Matrix4.fromTranslation(translation);
    // });

    //////////////////////////////////////////////////////////////////////////
    // Style 3D Tileset
    //////////////////////////////////////////////////////////////////////////

    // // Define a white, opaque building style
    // var defaultStyle = new Cesium.Cesium3DTileStyle({
    //     color : "color('white')",
    //     show : true
    // });

    // // Set the tileset style to default
    // city.style = defaultStyle;

    // // Define a white, transparent building style
    // var transparentStyle = new Cesium.Cesium3DTileStyle({
    //     color : "color('white', 0.3)",
    //     show : true
    // });

    // // Define a style in which buildings are colored by height
    // var heightStyle = new Cesium.Cesium3DTileStyle({
    //     color : {
    //         conditions : [
    //             ["${height} >= 300", "rgba(45, 0, 75, 0.5)"],
    //             ["${height} >= 200", "rgb(102, 71, 151)"],
    //             ["${height} >= 100", "rgb(170, 162, 204)"],
    //             ["${height} >= 50", "rgb(224, 226, 238)"],
    //             ["${height} >= 25", "rgb(252, 230, 200)"],
    //             ["${height} >= 10", "rgb(248, 176, 87)"],
    //             ["${height} >= 5", "rgb(198, 106, 11)"],
    //             ["true", "rgb(127, 59, 8)"]
    //         ]
    //     }
    // });

    // var tileStyle = document.getElementById('tileStyle');
    // function set3DTileStyle() {
    //     var selectedStyle = tileStyle.options[tileStyle.selectedIndex].value;
    //     if (selectedStyle === 'none') {
    //         city.style = defaultStyle;
    //     } else if (selectedStyle === 'height') {
    //         city.style = heightStyle;
    //     } else if (selectedStyle === 'transparent') {
    //         city.style = transparentStyle;
    //     }
    // }
    // tileStyle.addEventListener('change', set3DTileStyle);

    //////////////////////////////////////////////////////////////////////////
    // Custom mouse interaction for highlighting and selecting
    //////////////////////////////////////////////////////////////////////////

    // // If the mouse is over a point of interest, change the entity billboard scale and color
    // var previousPickedEntity;
    // var handler = viewer.screenSpaceEventHandler;
    // handler.setInputAction(function (movement) {
    //     var pickedPrimitive = viewer.scene.pick(movement.endPosition);
    //     var pickedEntity = Cesium.defined(pickedPrimitive) ? pickedPrimitive.id : undefined;
    //     // Unhighlight the previously picked entity
    //     if (Cesium.defined(previousPickedEntity)) {
    //         previousPickedEntity.billboard.scale = 1.0;
    //         previousPickedEntity.billboard.color = Cesium.Color.WHITE;
    //     }
    //     // Highlight the currently picked entity
    //     if (Cesium.defined(pickedEntity) && Cesium.defined(pickedEntity.billboard)) {
    //         pickedEntity.billboard.scale = 2.0;
    //         pickedEntity.billboard.color = Cesium.Color.ORANGERED;
    //         previousPickedEntity = pickedEntity;
    //     }
    // }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

    //////////////////////////////////////////////////////////////////////////
    // Setup Camera Modes
    //////////////////////////////////////////////////////////////////////////

    // var freeModeElement = document.getElementById('freeMode');
    // var droneModeElement = document.getElementById('droneMode');

    // // Create a follow camera by tracking the drone entity
    // function setViewMode() {
    //     if (droneModeElement.checked) {
    //         viewer.trackedEntity = drone;
    //     } else {
    //         viewer.trackedEntity = undefined;
    //         viewer.scene.camera.flyTo(homeCameraView);
    //     }
    // }

    // freeModeElement.addEventListener('change', setViewMode);
    // droneModeElement.addEventListener('change', setViewMode);

    // viewer.trackedEntityChanged.addEventListener(function() {
    //     if (viewer.trackedEntity === drone) {
    //         freeModeElement.checked = false;
    //         droneModeElement.checked = true;
    //     }
    // });

    //////////////////////////////////////////////////////////////////////////
    // Setup Display Options
    //////////////////////////////////////////////////////////////////////////

    // var shadowsElement = document.getElementById('shadows');
    // var neighborhoodsElement =  document.getElementById('neighborhoods');

    // shadowsElement.addEventListener('change', function (e) {
    //     viewer.shadows = e.target.checked;
    // });

    // neighborhoodsElement.addEventListener('change', function (e) {
    //     neighborhoods.show = e.target.checked;
    // });

    // // Finally, wait for the initial city to be ready before removing the loading indicator.
    // var loadingIndicator = document.getElementById('loadingIndicator');
    // loadingIndicator.style.display = 'block';
    // city.readyPromise.then(function () {
    //     loadingIndicator.style.display = 'none';
    // });

}());