import * as RE from 'rogue-engine';
import * as THREE from 'three'
import { Vector2 } from 'three';
import RaycastReceiver from './RaycastReceiver.re';

export default class RaycastReporter extends RE.Component {
  // @RE.Prop("Select") something;
  // somethingOptions = ["One", "Two"]

  @RE.PropList("String") receiverClass = ["RaycastReceiver"]
  allHovered = []
  awake() {

  }

  start() {
    this.mouse = new THREE.Vector2(0,0)
    this.raycaster = new THREE.Raycaster()
    this.updated = false
    RE.Input.touch.enabled = true
  }

  normalizeScreenInput(browserVector, gameVector) {
    const bounds = RE.Runtime.rogueDOMContainer.getBoundingClientRect();
    gameVector.x = ( ( browserVector.x - bounds.left ) / bounds.width ) * 2 - 1;
    gameVector.y = -( ( browserVector.y - bounds.top ) / bounds.height ) * 2 + 1
  }

  getMouseInput() {
    if (!RE.Input.mouse.isMoving) {
      return
    }

    this.normalizeScreenInput(RE.Input.mouse, this.mouse)
    this.updated = true
  }

  getTouchInput() {
    if(RE.Input.touch.touches.length == 0) {
      return
    }

    this.normalizeScreenInput(RE.Input.touch.touches[0], this.mouse)
    this.updated = true

  }

  update() {
    this.updated = false
    this.getMouseInput()
    this.getTouchInput()

    if(!this.updated) {
      return
    }

    this.raycaster.setFromCamera(this.mouse, this.object3d)

    let intersects = this.raycaster.intersectObjects(RE.App.currentScene.children)

    let listeningComponents = []
    intersects.forEach(intersect => {
      let object3d = RE.App.currentScene.getObjectByProperty('uuid', intersect.object.uuid)
      let component = RE.getComponent(RaycastReceiver, object3d)
      while(component == null && object3d.parent != null) {
        object3d = object3d.parent
        component = RE.getComponent(RaycastReceiver, object3d)
      }
      if(component != null) {
        listeningComponents.push( {component: component, intersect: intersect})
      }
    })

    for(let i = 0; i < this.allHovered.length; i++) {
      let dataThing = this.allHovered[i]
      if(!listeningComponents.includes(dataThing)) {
        dataThing.component.onMouseOut()
      }
    }

    this.allHovered = []

    for(let i = 0; i < listeningComponents.length; i++) {
      let component = listeningComponents[i].component
      if(component.onMouseOver(listeningComponents[i].intersect) === false) {
        this.allHovered.push(listeningComponents[i])
        break;
      }
      this.allHovered.push(listeningComponents[i])
    }
  }
}

RE.registerComponent(RaycastReporter);