/**
    An object, which moves about it straight lines.
    The Player must avoid thoughing these (unless the Rock and the Player are the same clan aka same colour).
*/
class Rock : AbstractTaggedRole {

    @Attribute
    val velocity = Vector2(1.0, 1.0)

    @Attribute
    var clan = Clan.MO

    @Attribute
    var rotation = 0.0

    var play : Play
    var mainView : StageView = null

    override fun activated() {
        play = Play.instance
        actor.color = clan.color.copy()

        // Tagged with all clans EXCEPT my own, so that Player need only check for collisions
        // with his clan.
        tags.addAll( Clan.EENY, Clan.MEENY, Clan.MINY, Clan.MO )
        tags.remove( clan )

        mainView = Game.instance.scene.findView("main") as StageView

    }

    override fun tick() {

        val margin = 30 // Slightly less thatn the width of the edges

        actor.direction.degrees += rotation / 60
        actor.position += velocity
        val gameInfo = Game.instance.resources.gameInfo

        // Normalise the position to 0..width and 0..height
        while (actor.x < 0) actor.x += gameInfo.width
        while (actor.y < 0) actor.y += gameInfo.height
        while (actor.x > gameInfo.width) actor.x -= gameInfo.width
        while (actor.y > gameInfo.height) actor.y -= gameInfo.height

        val worldRect = actor.appearance.worldRect()

        if (play.horizontalClan != clan) {
            // Bounce off the edge of the screen?
            if (worldRect.left < margin && velocity.x < 0) {
                velocity.x = - velocity.x
                actor.event("wall")
            } else if (worldRect.right > gameInfo.width - margin && velocity.x > 0) {
                velocity.x = - velocity.x
                actor.event("wall")
            }

        }

        if (play.verticalClan != clan) {
            // Bounce off the edge of the screen?
            if (worldRect.bottom < margin && velocity.y < 0) {
                velocity.y = - velocity.y
                actor.event("wall")
            } else if (worldRect.top > gameInfo.height - margin && velocity.y > 0) {
                velocity.y = - velocity.y
                actor.event("wall")
            }
        }

    }

}