import {
	UVMapping,
	CubeReflectionMapping,
	CubeRefractionMapping,
	EquirectangularReflectionMapping,
	EquirectangularRefractionMapping,
	CubeUVReflectionMapping,

	RepeatWrapping,
	ClampToEdgeWrapping,
	MirroredRepeatWrapping,

	NearestFilter,
	NearestMipmapNearestFilter,
	NearestMipmapLinearFilter,
	LinearFilter,
	LinearMipmapNearestFilter,
	LinearMipmapLinearFilter
} from '../constants.js';
import { InstancedBufferAttribute } from '../core/InstancedBufferAttribute.js';
import { Color } from '../math/Color.js';
import { Object3D } from '../core/Object3D.js';
import { Group } from '../objects/Group.js';
import { InstancedMesh } from '../objects/InstancedMesh.js';
import { BatchedMesh } from '../objects/BatchedMesh.js';
import { Sprite } from '../objects/Sprite.js';
import { Points } from '../objects/Points.js';
import { Line } from '../objects/Line.js';
import { LineLoop } from '../objects/LineLoop.js';
import { LineSegments } from '../objects/LineSegments.js';
import { LOD } from '../objects/LOD.js';
import { Mesh } from '../objects/Mesh.js';
import { SkinnedMesh } from '../objects/SkinnedMesh.js';
import { Bone } from '../objects/Bone.js';
import { Skeleton } from '../objects/Skeleton.js';
import { Shape } from '../extras/core/Shape.js';
import { Fog } from '../scenes/Fog.js';
import { FogExp2 } from '../scenes/FogExp2.js';
import { HemisphereLight } from '../lights/HemisphereLight.js';
import { SpotLight } from '../lights/SpotLight.js';
import { PointLight } from '../lights/PointLight.js';
import { DirectionalLight } from '../lights/DirectionalLight.js';
import { AmbientLight } from '../lights/AmbientLight.js';
import { RectAreaLight } from '../lights/RectAreaLight.js';
import { LightProbe } from '../lights/LightProbe.js';
import { OrthographicCamera } from '../cameras/OrthographicCamera.js';
import { PerspectiveCamera } from '../cameras/PerspectiveCamera.js';
import { Scene } from '../scenes/Scene.js';
import { CubeTexture } from '../textures/CubeTexture.js';
import { Texture } from '../textures/Texture.js';
import { Source } from '../textures/Source.js';
import { DataTexture } from '../textures/DataTexture.js';
import { ImageLoader } from './ImageLoader.js';
import { LoadingManager } from './LoadingManager.js';
import { AnimationClip } from '../animation/AnimationClip.js';
import { MaterialLoader } from './MaterialLoader.js';
import { LoaderUtils } from './LoaderUtils.js';
import { BufferGeometryLoader } from './BufferGeometryLoader.js';
import { Loader } from './Loader.js';
import { FileLoader } from './FileLoader.js';
import * as Geometries from '../geometries/Geometries.js';
import { getTypedArray, error, warn } from '../utils.js';
import { Box3 } from '../math/Box3.js';
import { Sphere } from '../math/Sphere.js';

/**
 * A loader for loading a JSON resource in the [JSON Object/Scene format](https://github.com/mrdoob/three.js/wiki/JSON-Object-Scene-format-4).
 * The files are internally loaded via {@link FileLoader}.
 *
 * ```js
 * const loader = new THREE.ObjectLoader();
 * const obj = await loader.loadAsync( 'models/json/example.json' );
 * scene.add( obj );
 *
 * // Alternatively, to parse a previously loaded JSON structure
 * const object = await loader.parseAsync( a_json_object );
 * scene.add( object );
 * ```
 *
 * @augments Loader
 */
class ObjectLoader extends Loader {

	/**
	 * Constructs a new object loader.
	 *
	 * @param {LoadingManager} [manager] - The loading manager.
	 */
	constructor( manager ) {

		super( manager );

	}

	/**
	 * Starts loading from the given URL and pass the loaded 3D object to the `onLoad()` callback.
	 *
	 * @param {string} url - The path/URL of the file to be loaded. This can also be a data URI.
	 * @param {function(Object3D)} onLoad - Executed when the loading process has been finished.
	 * @param {onProgressCallback} onProgress - Executed while the loading is in progress.
	 * @param {onErrorCallback} onError - Executed when errors occur.
	 */
	load( url, onLoad, onProgress, onError ) {

		const scope = this;

		const path = ( this.path === '' ) ? LoaderUtils.extractUrlBase( url ) : this.path;
		this.resourcePath = this.resourcePath || path;

		const loader = new FileLoader( this.manager );
		loader.setPath( this.path );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );
		loader.load( url, function ( text ) {

			let json = null;

			try {

				json = JSON.parse( text );

			} catch ( error ) {

				if ( onError !== undefined ) onError( error );

				error( 'ObjectLoader: Can\'t parse ' + url + '.', error.message );

				return;

			}

			const metadata = json.metadata;

			if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {

				if ( onError !== undefined ) onError( new Error( 'THREE.ObjectLoader: Can\'t load ' + url ) );

				error( 'ObjectLoader: Can\'t load ' + url );
				return;

			}

			scope.parse( json, onLoad );

		}, onProgress, onError );

	}

	/**
	 * Async version of {@link ObjectLoader#load}.
	 *
	 * @async
	 * @param {string} url - The path/URL of the file to be loaded. This can also be a data URI.
	 * @param {onProgressCallback} onProgress - Executed while the loading is in progress.
	 * @return {Promise<Object3D>} A Promise that resolves with the loaded 3D object.
	 */
	async loadAsync( url, onProgress ) {

		const scope = this;

		const path = ( this.path === '' ) ? LoaderUtils.extractUrlBase( url ) : this.path;
		this.resourcePath = this.resourcePath || path;

		const loader = new FileLoader( this.manager );
		loader.setPath( this.path );
		loader.setRequestHeader( this.requestHeader );
		loader.setWithCredentials( this.withCredentials );

		const text = await loader.loadAsync( url, onProgress );

		const json = JSON.parse( text );

		const metadata = json.metadata;

		if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {

			throw new Error( 'THREE.ObjectLoader: Can\'t load ' + url );

		}

		return await scope.parseAsync( json );

	}

	/**
	 * Parses the given JSON. This is used internally by {@link ObjectLoader#load}
	 * but can also be used directly to parse a previously loaded JSON structure.
	 *
	 * @param {Object} json - The serialized 3D object.
	 * @param {onLoad} onLoad - Executed when all resources (e.g. textures) have been fully loaded.
	 * @return {Object3D} The parsed 3D object.
	 */
	parse( json, onLoad ) {

		const animations = this.parseAnimations( json.animations );
		const shapes = this.parseShapes( json.shapes );
		const geometries = this.parseGeometries( json.geometries, shapes );

		const images = this.parseImages( json.images, function () {

			if ( onLoad !== undefined ) onLoad( object );

		} );

		const textures = this.parseTextures( json.textures, images );
		const materials = this.parseMaterials( json.materials, textures );

		const object = this.parseObject( json.object, geometries, materials, textures, animations );
		const skeletons = this.parseSkeletons( json.skeletons, object );

		this.bindSkeletons( object, skeletons );
		this.bindLightTargets( object );

		//

		if ( onLoad !== undefined ) {

			let hasImages = false;

			for ( const uuid in images ) {

				if ( images[ uuid ].data instanceof HTMLImageElement ) {

					hasImages = true;
					break;

				}

			}

			if ( hasImages === false ) onLoad( object );

		}

		return object;

	}

	/**
	 * Async version of {@link ObjectLoader#parse}.
	 *
	 * @param {Object} json - The serialized 3D object.
	 * @return {Promise<Object3D>} A Promise that resolves with the parsed 3D object.
	 */
	async parseAsync( json ) {

		const animations = this.parseAnimations( json.animations );
		const shapes = this.parseShapes( json.shapes );
		const geometries = this.parseGeometries( json.geometries, shapes );

		const images = await this.parseImagesAsync( json.images );

		const textures = this.parseTextures( json.textures, images );
		const materials = this.parseMaterials( json.materials, textures );

		const object = this.parseObject( json.object, geometries, materials, textures, animations );
		const skeletons = this.parseSkeletons( json.skeletons, object );

		this.bindSkeletons( object, skeletons );
		this.bindLightTargets( object );

		return object;

	}

	// internals

	parseShapes( json ) {

		const shapes = {};

		if ( json !== undefined ) {

			for ( let i = 0, l = json.length; i < l; i ++ ) {

				const shape = new Shape().fromJSON( json[ i ] );

				shapes[ shape.uuid ] = shape;

			}

		}

		return shapes;

	}

	parseSkeletons( json, object ) {

		const skeletons = {};
		const bones = {};

		// generate bone lookup table

		object.traverse( function ( child ) {

			if ( child.isBone ) bones[ child.uuid ] = child;

		} );

		// create skeletons

		if ( json !== undefined ) {

			for ( let i = 0, l = json.length; i < l; i ++ ) {

				const skeleton = new Skeleton().fromJSON( json[ i ], bones );

				skeletons[ skeleton.uuid ] = skeleton;

			}

		}

		return skeletons;

	}

	parseGeometries( json, shapes ) {

		const geometries = {};

		if ( json !== undefined ) {

			const bufferGeometryLoader = new BufferGeometryLoader();

			for ( let i = 0, l = json.length; i < l; i ++ ) {

				let geometry;
				const data = json[ i ];

				switch ( data.type ) {

					case 'BufferGeometry':
					case 'InstancedBufferGeometry':

						geometry = bufferGeometryLoader.parse( data );
						break;

					default:

						if ( data.type in Geometries ) {

							geometry = Geometries[ data.type ].fromJSON( data, shapes );

						} else {

							warn( `ObjectLoader: Unsupported geometry type "${ data.type }"` );

						}

				}

				geometry.uuid = data.uuid;

				if ( data.name !== undefined ) geometry.name = data.name;
				if ( data.userData !== undefined ) geometry.userData = data.userData;

				geometries[ data.uuid ] = geometry;

			}

		}

		return geometries;

	}

	parseMaterials( json, textures ) {

		const cache = {}; // MultiMaterial
		const materials = {};

		if ( json !== undefined ) {

			const loader = new MaterialLoader();
			loader.setTextures( textures );

			for ( let i = 0, l = json.length; i < l; i ++ ) {

				const data = json[ i ];

				if ( cache[ data.uuid ] === undefined ) {

					cache[ data.uuid ] = loader.parse( data );

				}

				materials[ data.uuid ] = cache[ data.uuid ];

			}

		}

		return materials;

	}

	parseAnimations( json ) {

		const animations = {};

		if ( json !== undefined ) {

			for ( let i = 0; i < json.length; i ++ ) {

				const data = json[ i ];

				const clip = AnimationClip.parse( data );

				animations[ clip.uuid ] = clip;

			}

		}

		return animations;

	}

	parseImages( json, onLoad ) {

		const scope = this;
		const images = {};

		let loader;

		function loadImage( url ) {

			scope.manager.itemStart( url );

			return loader.load( url, function () {

				scope.manager.itemEnd( url );

			}, undefined, function () {

				scope.manager.itemError( url );
				scope.manager.itemEnd( url );

			} );

		}

		function deserializeImage( image ) {

			if ( typeof image === 'string' ) {

				const url = image;

				const path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( url ) ? url : scope.resourcePath + url;

				return loadImage( path );

			} else {

				if ( image.data ) {

					return {
						data: getTypedArray( image.type, image.data ),
						width: image.width,
						height: image.height
					};

				} else {

					return null;

				}

			}

		}

		if ( json !== undefined && json.length > 0 ) {

			const manager = new LoadingManager( onLoad );

			loader = new ImageLoader( manager );
			loader.setCrossOrigin( this.crossOrigin );

			for ( let i = 0, il = json.length; i < il; i ++ ) {

				const image = json[ i ];
				const url = image.url;

				if ( Array.isArray( url ) ) {

					// load array of images e.g CubeTexture

					const imageArray = [];

					for ( let j = 0, jl = url.length; j < jl; j ++ ) {

						const currentUrl = url[ j ];

						const deserializedImage = deserializeImage( currentUrl );

						if ( deserializedImage !== null ) {

							if ( deserializedImage instanceof HTMLImageElement ) {

								imageArray.push( deserializedImage );

							} else {

								// special case: handle array of data textures for cube textures

								imageArray.push( new DataTexture( deserializedImage.data, deserializedImage.width, deserializedImage.height ) );

							}

						}

					}

					images[ image.uuid ] = new Source( imageArray );

				} else {

					// load single image

					const deserializedImage = deserializeImage( image.url );
					images[ image.uuid ] = new Source( deserializedImage );


				}

			}

		}

		return images;

	}

	async parseImagesAsync( json ) {

		const scope = this;
		const images = {};

		let loader;

		async function deserializeImage( image ) {

			if ( typeof image === 'string' ) {

				const url = image;

				const path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( url ) ? url : scope.resourcePath + url;

				return await loader.loadAsync( path );

			} else {

				if ( image.data ) {

					return {
						data: getTypedArray( image.type, image.data ),
						width: image.width,
						height: image.height
					};

				} else {

					return null;

				}

			}

		}

		if ( json !== undefined && json.length > 0 ) {

			loader = new ImageLoader( this.manager );
			loader.setCrossOrigin( this.crossOrigin );

			for ( let i = 0, il = json.length; i < il; i ++ ) {

				const image = json[ i ];
				const url = image.url;

				if ( Array.isArray( url ) ) {

					// load array of images e.g CubeTexture

					const imageArray = [];

					for ( let j = 0, jl = url.length; j < jl; j ++ ) {

						const currentUrl = url[ j ];

						const deserializedImage = await deserializeImage( currentUrl );

						if ( deserializedImage !== null ) {

							if ( deserializedImage instanceof HTMLImageElement ) {

								imageArray.push( deserializedImage );

							} else {

								// special case: handle array of data textures for cube textures

								imageArray.push( new DataTexture( deserializedImage.data, deserializedImage.width, deserializedImage.height ) );

							}

						}

					}

					images[ image.uuid ] = new Source( imageArray );

				} else {

					// load single image

					const deserializedImage = await deserializeImage( image.url );
					images[ image.uuid ] = new Source( deserializedImage );

				}

			}

		}

		return images;

	}

	parseTextures( json, images ) {

		function parseConstant( value, type ) {

			if ( typeof value === 'number' ) return value;

			warn( 'ObjectLoader.parseTexture: Constant should be in numeric form.', value );

			return type[ value ];

		}

		const textures = {};

		if ( json !== undefined ) {

			for ( let i = 0, l = json.length; i < l; i ++ ) {

				const data = json[ i ];

				if ( data.image === undefined ) {

					warn( 'ObjectLoader: No "image" specified for', data.uuid );

				}

				if ( images[ data.image ] === undefined ) {

					warn( 'ObjectLoader: Undefined image', data.image );

				}

				const source = images[ data.image ];
				const image = source.data;

				let texture;

				if ( Array.isArray( image ) ) {

					texture = new CubeTexture();

					if ( image.length === 6 ) texture.needsUpdate = true;

				} else {

					if ( image && image.data ) {

						texture = new DataTexture();

					} else {

						texture = new Texture();

					}

					if ( image ) texture.needsUpdate = true; // textures can have undefined image data

				}

				texture.source = source;

				texture.uuid = data.uuid;

				if ( data.name !== undefined ) texture.name = data.name;

				if ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING );
				if ( data.channel !== undefined ) texture.channel = data.channel;

				if ( data.offset !== undefined ) texture.offset.fromArray( data.offset );
				if ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );
				if ( data.center !== undefined ) texture.center.fromArray( data.center );
				if ( data.rotation !== undefined ) texture.rotation = data.rotation;

				if ( data.wrap !== undefined ) {

					texture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );
					texture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );

				}

				if ( data.format !== undefined ) texture.format = data.format;
				if ( data.internalFormat !== undefined ) texture.internalFormat = data.internalFormat;
				if ( data.type !== undefined ) texture.type = data.type;
				if ( data.colorSpace !== undefined ) texture.colorSpace = data.colorSpace;

				if ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER );
				if ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER );
				if ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;

				if ( data.flipY !== undefined ) texture.flipY = data.flipY;

				if ( data.generateMipmaps !== undefined ) texture.generateMipmaps = data.generateMipmaps;
				if ( data.premultiplyAlpha !== undefined ) texture.premultiplyAlpha = data.premultiplyAlpha;
				if ( data.unpackAlignment !== undefined ) texture.unpackAlignment = data.unpackAlignment;
				if ( data.compareFunction !== undefined ) texture.compareFunction = data.compareFunction;

				if ( data.userData !== undefined ) texture.userData = data.userData;

				textures[ data.uuid ] = texture;

			}

		}

		return textures;

	}

	parseObject( data, geometries, materials, textures, animations ) {

		let object;

		function getGeometry( name ) {

			if ( geometries[ name ] === undefined ) {

				warn( 'ObjectLoader: Undefined geometry', name );

			}

			return geometries[ name ];

		}

		function getMaterial( name ) {

			if ( name === undefined ) return undefined;

			if ( Array.isArray( name ) ) {

				const array = [];

				for ( let i = 0, l = name.length; i < l; i ++ ) {

					const uuid = name[ i ];

					if ( materials[ uuid ] === undefined ) {

						warn( 'ObjectLoader: Undefined material', uuid );

					}

					array.push( materials[ uuid ] );

				}

				return array;

			}

			if ( materials[ name ] === undefined ) {

				warn( 'ObjectLoader: Undefined material', name );

			}

			return materials[ name ];

		}

		function getTexture( uuid ) {

			if ( textures[ uuid ] === undefined ) {

				warn( 'ObjectLoader: Undefined texture', uuid );

			}

			return textures[ uuid ];

		}

		let geometry, material;

		switch ( data.type ) {

			case 'Scene':

				object = new Scene();

				if ( data.background !== undefined ) {

					if ( Number.isInteger( data.background ) ) {

						object.background = new Color( data.background );

					} else {

						object.background = getTexture( data.background );

					}

				}

				if ( data.environment !== undefined ) {

					object.environment = getTexture( data.environment );

				}

				if ( data.fog !== undefined ) {

					if ( data.fog.type === 'Fog' ) {

						object.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );

					} else if ( data.fog.type === 'FogExp2' ) {

						object.fog = new FogExp2( data.fog.color, data.fog.density );

					}

					if ( data.fog.name !== '' ) {

						object.fog.name = data.fog.name;

					}

				}

				if ( data.backgroundBlurriness !== undefined ) object.backgroundBlurriness = data.backgroundBlurriness;
				if ( data.backgroundIntensity !== undefined ) object.backgroundIntensity = data.backgroundIntensity;
				if ( data.backgroundRotation !== undefined ) object.backgroundRotation.fromArray( data.backgroundRotation );

				if ( data.environmentIntensity !== undefined ) object.environmentIntensity = data.environmentIntensity;
				if ( data.environmentRotation !== undefined ) object.environmentRotation.fromArray( data.environmentRotation );

				break;

			case 'PerspectiveCamera':

				object = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );

				if ( data.focus !== undefined ) object.focus = data.focus;
				if ( data.zoom !== undefined ) object.zoom = data.zoom;
				if ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;
				if ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;
				if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );

				break;

			case 'OrthographicCamera':

				object = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );

				if ( data.zoom !== undefined ) object.zoom = data.zoom;
				if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );

				break;

			case 'AmbientLight':

				object = new AmbientLight( data.color, data.intensity );

				break;

			case 'DirectionalLight':

				object = new DirectionalLight( data.color, data.intensity );
				object.target = data.target || '';

				break;

			case 'PointLight':

				object = new PointLight( data.color, data.intensity, data.distance, data.decay );

				break;

			case 'RectAreaLight':

				object = new RectAreaLight( data.color, data.intensity, data.width, data.height );

				break;

			case 'SpotLight':

				object = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );
				object.target = data.target || '';

				break;

			case 'HemisphereLight':

				object = new HemisphereLight( data.color, data.groundColor, data.intensity );

				break;

			case 'LightProbe':

				object = new LightProbe().fromJSON( data );

				break;

			case 'SkinnedMesh':

				geometry = getGeometry( data.geometry );
			 	material = getMaterial( data.material );

				object = new SkinnedMesh( geometry, material );

				if ( data.bindMode !== undefined ) object.bindMode = data.bindMode;
				if ( data.bindMatrix !== undefined ) object.bindMatrix.fromArray( data.bindMatrix );
				if ( data.skeleton !== undefined ) object.skeleton = data.skeleton;

				break;

			case 'Mesh':

				geometry = getGeometry( data.geometry );
				material = getMaterial( data.material );

				object = new Mesh( geometry, material );

				break;

			case 'InstancedMesh':

				geometry = getGeometry( data.geometry );
				material = getMaterial( data.material );
				const count = data.count;
				const instanceMatrix = data.instanceMatrix;
				const instanceColor = data.instanceColor;

				object = new InstancedMesh( geometry, material, count );
				object.instanceMatrix = new InstancedBufferAttribute( new Float32Array( instanceMatrix.array ), 16 );
				if ( instanceColor !== undefined ) object.instanceColor = new InstancedBufferAttribute( new Float32Array( instanceColor.array ), instanceColor.itemSize );

				break;

			case 'BatchedMesh':

				geometry = getGeometry( data.geometry );
				material = getMaterial( data.material );

				object = new BatchedMesh( data.maxInstanceCount, data.maxVertexCount, data.maxIndexCount, material );
				object.geometry = geometry;
				object.perObjectFrustumCulled = data.perObjectFrustumCulled;
				object.sortObjects = data.sortObjects;

				object._drawRanges = data.drawRanges;
				object._reservedRanges = data.reservedRanges;

				object._geometryInfo = data.geometryInfo.map( info => {

					let box = null;
					let sphere = null;
					if ( info.boundingBox !== undefined ) {

						box = new Box3().fromJSON( info.boundingBox );

					}

					if ( info.boundingSphere !== undefined ) {

						sphere = new Sphere().fromJSON( info.boundingSphere );

					}

					return {
						...info,
						boundingBox: box,
						boundingSphere: sphere
					};

				} );
				object._instanceInfo = data.instanceInfo;

				object._availableInstanceIds = data._availableInstanceIds;
				object._availableGeometryIds = data._availableGeometryIds;

				object._nextIndexStart = data.nextIndexStart;
				object._nextVertexStart = data.nextVertexStart;
				object._geometryCount = data.geometryCount;

				object._maxInstanceCount = data.maxInstanceCount;
				object._maxVertexCount = data.maxVertexCount;
				object._maxIndexCount = data.maxIndexCount;

				object._geometryInitialized = data.geometryInitialized;

				object._matricesTexture = getTexture( data.matricesTexture.uuid );

				object._indirectTexture = getTexture( data.indirectTexture.uuid );

				if ( data.colorsTexture !== undefined ) {

					object._colorsTexture = getTexture( data.colorsTexture.uuid );

				}

				if ( data.boundingSphere !== undefined ) {

					object.boundingSphere = new Sphere().fromJSON( data.boundingSphere );

				}

				if ( data.boundingBox !== undefined ) {

					object.boundingBox = new Box3().fromJSON( data.boundingBox );

				}

				break;

			case 'LOD':

				object = new LOD();

				break;

			case 'Line':

				object = new Line( getGeometry( data.geometry ), getMaterial( data.material ) );

				break;

			case 'LineLoop':

				object = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );

				break;

			case 'LineSegments':

				object = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );

				break;

			case 'PointCloud':
			case 'Points':

				object = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );

				break;

			case 'Sprite':

				object = new Sprite( getMaterial( data.material ) );

				break;

			case 'Group':

				object = new Group();

				break;

			case 'Bone':

				object = new Bone();

				break;

			default:

				object = new Object3D();

		}

		object.uuid = data.uuid;

		if ( data.name !== undefined ) object.name = data.name;

		if ( data.matrix !== undefined ) {

			object.matrix.fromArray( data.matrix );

			if ( data.matrixAutoUpdate !== undefined ) object.matrixAutoUpdate = data.matrixAutoUpdate;
			if ( object.matrixAutoUpdate ) object.matrix.decompose( object.position, object.quaternion, object.scale );

		} else {

			if ( data.position !== undefined ) object.position.fromArray( data.position );
			if ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );
			if ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );
			if ( data.scale !== undefined ) object.scale.fromArray( data.scale );

		}

		if ( data.up !== undefined ) object.up.fromArray( data.up );

		if ( data.castShadow !== undefined ) object.castShadow = data.castShadow;
		if ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;

		if ( data.shadow ) {

			if ( data.shadow.intensity !== undefined ) object.shadow.intensity = data.shadow.intensity;
			if ( data.shadow.bias !== undefined ) object.shadow.bias = data.shadow.bias;
			if ( data.shadow.normalBias !== undefined ) object.shadow.normalBias = data.shadow.normalBias;
			if ( data.shadow.radius !== undefined ) object.shadow.radius = data.shadow.radius;
			if ( data.shadow.mapSize !== undefined ) object.shadow.mapSize.fromArray( data.shadow.mapSize );
			if ( data.shadow.camera !== undefined ) object.shadow.camera = this.parseObject( data.shadow.camera );

		}

		if ( data.visible !== undefined ) object.visible = data.visible;
		if ( data.frustumCulled !== undefined ) object.frustumCulled = data.frustumCulled;
		if ( data.renderOrder !== undefined ) object.renderOrder = data.renderOrder;
		if ( data.userData !== undefined ) object.userData = data.userData;
		if ( data.layers !== undefined ) object.layers.mask = data.layers;

		if ( data.children !== undefined ) {

			const children = data.children;

			for ( let i = 0; i < children.length; i ++ ) {

				object.add( this.parseObject( children[ i ], geometries, materials, textures, animations ) );

			}

		}

		if ( data.animations !== undefined ) {

			const objectAnimations = data.animations;

			for ( let i = 0; i < objectAnimations.length; i ++ ) {

				const uuid = objectAnimations[ i ];

				object.animations.push( animations[ uuid ] );

			}

		}

		if ( data.type === 'LOD' ) {

			if ( data.autoUpdate !== undefined ) object.autoUpdate = data.autoUpdate;

			const levels = data.levels;

			for ( let l = 0; l < levels.length; l ++ ) {

				const level = levels[ l ];
				const child = object.getObjectByProperty( 'uuid', level.object );

				if ( child !== undefined ) {

					object.addLevel( child, level.distance, level.hysteresis );

				}

			}

		}

		return object;

	}

	bindSkeletons( object, skeletons ) {

		if ( Object.keys( skeletons ).length === 0 ) return;

		object.traverse( function ( child ) {

			if ( child.isSkinnedMesh === true && child.skeleton !== undefined ) {

				const skeleton = skeletons[ child.skeleton ];

				if ( skeleton === undefined ) {

					warn( 'ObjectLoader: No skeleton found with UUID:', child.skeleton );

				} else {

					child.bind( skeleton, child.bindMatrix );

				}

			}

		} );

	}

	bindLightTargets( object ) {

		object.traverse( function ( child ) {

			if ( child.isDirectionalLight || child.isSpotLight ) {

				const uuid = child.target;

				const target = object.getObjectByProperty( 'uuid', uuid );

				if ( target !== undefined ) {

					child.target = target;

				} else {

					child.target = new Object3D();

				}

			}

		} );

	}

}

const TEXTURE_MAPPING = {
	UVMapping: UVMapping,
	CubeReflectionMapping: CubeReflectionMapping,
	CubeRefractionMapping: CubeRefractionMapping,
	EquirectangularReflectionMapping: EquirectangularReflectionMapping,
	EquirectangularRefractionMapping: EquirectangularRefractionMapping,
	CubeUVReflectionMapping: CubeUVReflectionMapping
};

const TEXTURE_WRAPPING = {
	RepeatWrapping: RepeatWrapping,
	ClampToEdgeWrapping: ClampToEdgeWrapping,
	MirroredRepeatWrapping: MirroredRepeatWrapping
};

const TEXTURE_FILTER = {
	NearestFilter: NearestFilter,
	NearestMipmapNearestFilter: NearestMipmapNearestFilter,
	NearestMipmapLinearFilter: NearestMipmapLinearFilter,
	LinearFilter: LinearFilter,
	LinearMipmapNearestFilter: LinearMipmapNearestFilter,
	LinearMipmapLinearFilter: LinearMipmapLinearFilter
};

export { ObjectLoader };
