import * as THREE from 'three';
const {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} = THREE .DHTML	

import Stats from 'three/examples/jsm/libs/stats.module.js';

import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/examples/jsm/controls/OrbitControls0.js';
import { RectAreaLightHelper } from 'three/examples/jsm/helpers/RectAreaLightHelper.js';
import { RectAreaLightUniformsLib } from 'three/examples/jsm/lights/RectAreaLightUniformsLib.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 renderer, scene, camera;
  let stats, meshKnot;

  init();

  function init() {

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setAnimationLoop( animation );
    document.body.appendChild( renderer.domElement );

    camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
    camera.position.set( 0, 5, - 15 );

    scene = new THREE.Scene();

    RectAreaLightUniformsLib.init();

    const rectLight1 = new THREE.RectAreaLight( 0xff0000, 5, 4, 10 );
    rectLight1.position.set( - 5, 5, 5 );
    scene.add( rectLight1 );

    const rectLight2 = new THREE.RectAreaLight( 0x00ff00, 5, 4, 10 );
    rectLight2.position.set( 0, 5, 5 );
    scene.add( rectLight2 );

    const rectLight3 = new THREE.RectAreaLight( 0x0000ff, 5, 4, 10 );
    rectLight3.position.set( 5, 5, 5 );
    scene.add( rectLight3 );

    scene.add( new RectAreaLightHelper( rectLight1 ) );
    scene.add( new RectAreaLightHelper( rectLight2 ) );
    scene.add( new RectAreaLightHelper( rectLight3 ) );

    const geoFloor = new THREE.BoxGeometry( 2000, 0.1, 2000 );
    const matStdFloor = new THREE.MeshStandardMaterial( { color: 0xbcbcbc, roughness: 0.1, metalness: 0 } );
    const mshStdFloor = new THREE.Mesh( geoFloor, matStdFloor );
    scene.add( mshStdFloor );

    const geoKnot = new THREE.TorusKnotGeometry( 1.5, 0.5, 200, 16 );
    const matKnot = new THREE.MeshStandardMaterial( { color: 0xffffff, roughness: 0, metalness: 0 } );
    meshKnot = new THREE.Mesh( geoKnot, matKnot );
    meshKnot.position.set( 0, 5, 0 );
    scene.add( meshKnot );

    const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
    controls.target.copy( meshKnot.position );
    controls.update();

    //

    window.addEventListener( 'resize', onWindowResize );

    stats = new Stats();
    document.body.appendChild( stats.dom );

  }

  function onWindowResize() {

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

  }

  function animation( time ) {

    meshKnot.rotation.y = time / 1000;

    renderer.render( scene, camera );

    stats.update();

  }
  }
})