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 { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader.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,
      light1, light2, light3, light4,
      object, stats;

    const clock = new THREE.Clock();

    init();
    animate();

    function init() {

      camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
      camera.position.z = 100;

      scene = new THREE.Scene();

      //model

      const loader = new OBJLoader();
      loader.load( 'models/obj/walt/WaltHead.obj', function ( obj ) {

        object = obj;
        object.scale.multiplyScalar( 0.8 );
        object.position.y = - 30;
        scene.add( object );

      } );

      const sphere = new THREE.SphereGeometry( 0.5, 16, 8 );

      //lights

      light1 = new THREE.PointLight( 0xff0040, 400 );
      light1.add( new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( { color: 0xff0040 } ) ) );
      scene.add( light1 );

      light2 = new THREE.PointLight( 0x0040ff, 400 );
      light2.add( new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( { color: 0x0040ff } ) ) );
      scene.add( light2 );

      light3 = new THREE.PointLight( 0x80ff80, 400 );
      light3.add( new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( { color: 0x80ff80 } ) ) );
      scene.add( light3 );

      light4 = new THREE.PointLight( 0xffaa00, 400 );
      light4.add( new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( { color: 0xffaa00 } ) ) );
      scene.add( light4 );

      //renderer

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

      //stats

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

      window.addEventListener( 'resize', onWindowResize );

    }

    function onWindowResize() {

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

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

    }

    function animate() {

      requestId = requestAnimationFrame( animate );

      render();
      stats.update();

    }

    function render() {

      const time = Date.now() * 0.0005;
      const delta = clock.getDelta();

      if ( object ) object.rotation.y -= 0.5 * delta;

      light1.position.x = Math.sin( time * 0.7 ) * 30;
      light1.position.y = Math.cos( time * 0.5 ) * 40;
      light1.position.z = Math.cos( time * 0.3 ) * 30;

      light2.position.x = Math.cos( time * 0.3 ) * 30;
      light2.position.y = Math.sin( time * 0.5 ) * 40;
      light2.position.z = Math.sin( time * 0.7 ) * 30;

      light3.position.x = Math.sin( time * 0.7 ) * 30;
      light3.position.y = Math.cos( time * 0.3 ) * 40;
      light3.position.z = Math.sin( time * 0.5 ) * 30;

      light4.position.x = Math.sin( time * 0.3 ) * 30;
      light4.position.y = Math.cos( time * 0.7 ) * 40;
      light4.position.z = Math.sin( time * 0.5 ) * 30;

      renderer.render( scene, camera );

    }
  }
})