class CQRock : Movable {

    override fun begin() {
        speed *= 4
        super.begin()
    }

    override fun myTurn() {

        val south = lookSouth()
        val below = south.item()

        if ( south.isEmpty() ) {
            moveSouth()
        } else if ( below is CQEnemy || below.isPlayer() ) {
            replaceAction( null )

            below.actor.event( "squash" )
            if (below.isMoving()) {
                (below as Movable).movement.cancel()
            }
            below.replaceAction( squashAction(below) thenOnce( this:>postMove.curry(below) ) )
        }
    }

    fun postMove( below : Item ) {
        val mySquare = square
        below.kill()
        val soil = actor.createChild( "soil" ).role as Soil
        soil.actor.y -= gridSize()
        mySquare.neighbour( 0, -1 ).addOccupant( soil, true )
        mySquare.addOccupant( this )
            replaceAction( createAction() )
    }

    fun delay() {
        replaceAction( Delay( 0.55 ) then createAction() )
    }

    fun squashAction( below : Item ) : Action {
        return (
            Fade( below.actor.color, 0.05, 0 ) then
            Fade( below.actor.color, 0.05, 1 )
        ).repeat( 2 )
    }
}