class Wormhole extends Item{

    //Class for the wormhole objects appearing on the game board
	//Inherits following properties from Item:
	/*
	id: string

    pos: Vector
    radius: number
    color: Serialized.Color
    settings: Settings.Item
	time: TimeProcess
	*/

    power: number

    constructor(settings: Settings.Wormhole){
        super(settings)
        this.power = settings.power
        this.fadeTime = settings.fadeTime
        this.radius = p.random(settings.minRadius, settings.maxRadius)
    }

    serialized(): Serialized.Wormhole{
        let item = super.serialized() as Serialized.Wormhole
        return item
    }

    destroy(): void{
		let index = game.wormholes.indexOf(this)
		game.wormholes.splice(index, 1)
	}

    attractBall(ball: Ball): void{
        let distance = ball.dist(this.centerX, this.centerY)
        let force = (this.power * ball.radius * this.currentRadius) / p.pow(distance, 2)
        let forceVector = Vector.sub(this.pos, ball.pos).setMag(force) as Vector
        ball.applyForce(forceVector)
    }

    show(): void{
        let alpha = 0

        p.push()
        p.noFill()
        p.strokeWeight(2)
        for (let r = this.currentRadius; r > 0; --r){

            let color = p.color(this.color.fill)
            color.setAlpha(p.constrain(alpha, 0, 1) * 255)
            p.stroke(color)
            p.ellipse(this.centerX, this.centerY, r * 2, r * 2)

            alpha += 1 / this.currentRadius;
        }

        p.pop()
    }
}