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 { PCDLoader } from 'three/examples/jsm/loaders/PCDLoader.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;

  init();
  render();

  function init() {

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

    scene = new THREE.Scene();

    camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 0.01, 40 );
    camera.position.set( 0, 0, 1 );
    scene.add( camera );

    const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
    controls.addEventListener( 'change', render ); // use if there is no animation loop
    controls.minDistance = 0.5;
    controls.maxDistance = 10;

    //scene.add( new THREE.AxesHelper( 1 ) );

    const loader = new PCDLoader();
    loader.load( './models/pcd/binary/Zaghetto.pcd', function ( points ) {

      points.geometry.center();
      points.geometry.rotateX( Math.PI );
      points.name = 'Zaghetto.pcd';
      scene.add( points );

      //

      const gui = new GUI();

      gui.add( points.material, 'size', 0.001, 0.01 ).onChange( render );
      gui.addColor( points.material, 'color' ).onChange( render );
      gui.open();

      //

      render();

    } );

    window.addEventListener( 'resize', onWindowResize );

  }

  function onWindowResize() {

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

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

    render();

  }

  function render() {

    renderer.render( scene, camera );

  }

  }
})