import * as THREE from 'three';
const {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} = THREE .DHTML
  import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/examples/jsm/controls/OrbitControls0.js';
  import { OBJExporter } from 'three/examples/jsm/exporters/OBJExporter.js';
  import { GUI } from 'three/examples/jsm/libs/lil-gui.module.min.js';
var requestId
Page({
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 10)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2",this).then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

			let camera, scene, renderer;

			const params = {
				addTriangle: addTriangle,
				addCube: addCube,
				addCylinder: addCylinder,
				addMultiple: addMultiple,
				addTransformed: addTransformed,
				addPoints: addPoints,
				exportToObj: exportToObj
			};

			init();
			animate();

			function init() {

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 0, 400 );

				scene = new THREE.Scene();

				const ambientLight = new THREE.AmbientLight( 0xffffff );
				scene.add( ambientLight );

				const directionalLight = new THREE.DirectionalLight( 0xffffff, 2.5 );
				directionalLight.position.set( 0, 1, 1 );
				scene.add( directionalLight );

				const gui = new GUI();

				let h = gui.addFolder( 'Geometry Selection' );
				h.add( params, 'addTriangle' ).name( 'Triangle' );
				h.add( params, 'addCube' ).name( 'Cube' );
				h.add( params, 'addCylinder' ).name( 'Cylinder' );
				h.add( params, 'addMultiple' ).name( 'Multiple objects' );
				h.add( params, 'addTransformed' ).name( 'Transformed objects' );
				h.add( params, 'addPoints' ).name( 'Point Cloud' );

				h = gui.addFolder( 'Export' );
				h.add( params, 'exportToObj' ).name( 'Export OBJ' );

				gui.open();

				addGeometry( 1 );

				window.addEventListener( 'resize', onWindowResize );

				const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
				controls.enablePan = false;

			}

			function exportToObj() {

				const exporter = new OBJExporter();
				const result = exporter.parse( scene );
				saveString( result, 'object.obj' );

			}

			function addGeometry( type ) {

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

					const child = scene.children[ i ];

					if ( child.isMesh || child.isPoints ) {

						child.geometry.dispose();
						scene.remove( child );
						i --;

					}

				}

				if ( type === 1 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = generateTriangleGeometry();

					scene.add( new THREE.Mesh( geometry, material ) );


				} else if ( type === 2 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = new THREE.BoxGeometry( 100, 100, 100 );
					scene.add( new THREE.Mesh( geometry, material ) );

				} else if ( type === 3 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
					scene.add( new THREE.Mesh( geometry, material ) );

				} else if ( type === 4 || type === 5 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = generateTriangleGeometry();

					const mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = - 200;
					scene.add( mesh );

					const geometry2 = new THREE.BoxGeometry( 100, 100, 100 );
					const mesh2 = new THREE.Mesh( geometry2, material );
					scene.add( mesh2 );

					const geometry3 = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
					const mesh3 = new THREE.Mesh( geometry3, material );
					mesh3.position.x = 200;
					scene.add( mesh3 );

					if ( type === 5 ) {

						mesh.rotation.y = Math.PI / 4.0;
						mesh2.rotation.y = Math.PI / 4.0;
						mesh3.rotation.y = Math.PI / 4.0;

					}

				} else if ( type === 6 ) {

					const points = [ 0, 0, 0, 100, 0, 0, 100, 100, 0, 0, 100, 0 ];
					const colors = [ 0.5, 0, 0, 0.5, 0, 0, 0, 0.5, 0, 0, 0.5, 0 ];

					const geometry = new THREE.BufferGeometry();
					geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
					geometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );

					const material = new THREE.PointsMaterial( { size: 10, vertexColors: true } );

					const pointCloud = new THREE.Points( geometry, material );
					pointCloud.name = 'point cloud';
					scene.add( pointCloud );

				}

			}

			function addTriangle() {

				addGeometry( 1 );

			}

			function addCube() {

				addGeometry( 2 );

			}

			function addCylinder() {

				addGeometry( 3 );

			}

			function addMultiple() {

				addGeometry( 4 );

			}

			function addTransformed() {

				addGeometry( 5 );

			}

			function addPoints() {

				addGeometry( 6 );

			}

			const link = document.createElement( 'a' );
			link.style.display = 'none';
			document.body.appendChild( link );

			function save( blob, filename ) {

				link.href = URL.createObjectURL( blob );
				link.download = filename;
				link.click();

			}

			function saveString( text, filename ) {

				save( new Blob( [ text ], { type: 'text/plain' } ), filename );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestId = requestAnimationFrame( animate );

				renderer.render( scene, camera );

			}

			function generateTriangleGeometry() {

				const geometry = new THREE.BufferGeometry();
				const vertices = [];

				vertices.push( - 50, - 50, 0 );
				vertices.push( 50, - 50, 0 );
				vertices.push( 50, 50, 0 );

				geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
				geometry.computeVertexNormals();

				return geometry;

			}
  }
})