import { _decorator, Component, EventMouse, Node, Sprite, SpriteFrame, UITransform, Vec2, Vec3 } from 'cc'
import MathUtils from '../../engine/utils/MathUtils'

const { ccclass, property } = _decorator

@ccclass('CannonManager')
export default class CannonManager extends Component {
  public static instance: CannonManager = null
  @property({ type: Node })
  private view: Node | null = null
  @property({ type: [SpriteFrame] })
  private cannonSpriteFrame: Array<SpriteFrame> | [] = []
  // 炮塔倍数
  public cannonType: number = 1
  private _vec3Cache: Vec3

  onLoad() {
    this._vec3Cache = new Vec3()
    CannonManager.instance = this
    this.node.parent.on(Node.EventType.MOUSE_MOVE, this.onMeMove.bind(this))
    this.refreshCannon()
  }

  private onMeMove(event: EventMouse) {
    this.rotateCannon(event.getUILocation())
  }

  public rotateCannon(uilocation: Vec2) {
    let location = uilocation
    this._vec3Cache.x = location.x
    this._vec3Cache.y = location.y
    this._vec3Cache.z = 0
    let tran = this.node.getComponent(UITransform)
    tran.convertToNodeSpaceAR(this._vec3Cache, this._vec3Cache)

    let localTouch: Vec2 = new Vec2(this._vec3Cache.x, this._vec3Cache.y)
    this.view.getPosition(this._vec3Cache)
    let rad: number = MathUtils.p2pRad(
      new Vec2(this._vec3Cache.x, this._vec3Cache.y),
      localTouch
    )
    let rot: number = MathUtils.radiansToDegrees(rad)
    this.view.angle = rot - 90
  }

  public refreshCannon() {
    this.view.getComponent(Sprite).spriteFrame =
      this.cannonSpriteFrame[this.cannonType - 1]
  }

  public getCannonPosition() {
    return this.view.getPosition()
  }

  onDestroy() {
    CannonManager.instance = null
  }
}