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 = listeningComponents.filter((dataThing) => {
					dataThing.component.object3d.uuid != component.object3d.uuid
				})
				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 dataThing = listeningComponents[i]
			this.allHovered.push(dataThing)
			if (dataThing.component.onMouseOver(dataThing.intersect) === false) {
				break;
			}
		}
	}
}

RE.registerComponent(RaycastReporter);