/**

    The gate through which the ship must travel when the level is complete.
    The gate is initially closed, and will open when all required cargo has been
    transported through a CargoGate.

*/
class ExitGate : AbstractRole {

    @Attribute( isSceneName=true )
    var nextScene = "test"
    
    var isOpen = false

    // The bars are initially visible, and then scaled to zero when this gate is opened.
    var bars : Bars

    override fun begin() {
        super.begin()
        bars = actor.createChild( "bars" ).role as Bars
    }

    override fun tick() {
    }

    fun open() {
        isOpen = true
        actor.event( "open" )
        bars.open()
    }

    fun transportShip( ship : Ship ) {
        actor.event( "sending" )
        ship.actor.role = ExitGateEntryAnimation( ship.actor, actor, OnShipSent( nextScene ) )
    }

}


class ExitGateEntryAnimation( val shipActor : Actor, val gateActor : Actor, val postAction : Action ) : ActionRole() {

    override fun createAction() : Action {
        val distance = gateActor.position - shipActor.position

        return (
            MoveBy( shipActor.position, 0.5, distance, Eases.easeOut )
            .then( ScaleTo( shipActor, 1.3, 0.01 ) )
        ).and (
            TurnBy( shipActor.direction, 1.8, Angle.degrees(720), Eases.easeIn )
        ).then( postAction )
    }

}

class OnShipSent( val nextScene : String ) : AbstractAction() {
    override fun act() : bool {

        Game.instance.startScene( nextScene )
        return true
    }
}