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 { 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 container, stats;

  let camera, scene, renderer;

  let pointLight;

  init();
  animate();

  function init() {

    container = document.createElement( 'div' );
    document.body.appendChild( container );

    camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
    camera.position.z = 13;

    //cubemap
    const path = 'textures/cube/SwedishRoyalCastle/';
    const format = '.jpg';
    const urls = [
      path + 'px' + format, path + 'nx' + format,
      path + 'py' + format, path + 'ny' + format,
      path + 'pz' + format, path + 'nz' + format
    ];

    const reflectionCube = new THREE.CubeTextureLoader().load( urls );
    const refractionCube = new THREE.CubeTextureLoader().load( urls );
    refractionCube.mapping = THREE.CubeRefractionMapping;

    scene = new THREE.Scene();
    scene.background = reflectionCube;

    //lights
    const ambient = new THREE.AmbientLight( 0xffffff, 3 );
    scene.add( ambient );

    pointLight = new THREE.PointLight( 0xffffff, 200 );
    scene.add( pointLight );

    //materials
    const cubeMaterial3 = new THREE.MeshLambertMaterial( { color: 0xffaa00, envMap: reflectionCube, combine: THREE.MixOperation, reflectivity: 0.3 } );
    const cubeMaterial2 = new THREE.MeshLambertMaterial( { color: 0xfff700, envMap: refractionCube, refractionRatio: 0.95 } );
    const cubeMaterial1 = new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: reflectionCube } );

    //models
    const objLoader = new OBJLoader();

    objLoader.setPath( 'models/obj/walt/' );
    objLoader.load( 'WaltHead.obj', function ( object ) {

      const head = object.children[ 0 ];
      head.scale.setScalar( 0.1 );
      head.position.y = - 3;
      head.material = cubeMaterial1;

      const head2 = head.clone();
      head2.position.x = - 6;
      head2.material = cubeMaterial2;

      const head3 = head.clone();
      head3.position.x = 6;
      head3.material = cubeMaterial3;

      scene.add( head, head2, head3 );

    } );

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

    //controls
    const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
    controls.enableZoom = false;
    controls.enablePan = false;
    controls.minPolarAngle = Math.PI / 4;
    controls.maxPolarAngle = Math.PI / 1.5;

    //stats
    stats = new Stats();
    container.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();

  }

  function render() {

    renderer.render( scene, camera );
    stats.update();

  }

  }
})