/**
    When a top-level scene has been completed, it unlocks more scenes of the same type.

    For example, when we complete scene "01", then the "plain/plain" GridMenu scene
    shows all of the numbered scenes in scene directory "plain".
    They are layed out as a grid.
    This menu is dynamically created (so just add a new Scene in the relevant directory,
    and it will appear in the grid.

    On the top-level Menu, we get to this GridMenu by clicking the "..." button.
*/
class GridMenu : Menu {

    var thumbX = 0.0
    var thumbY = 0.0

    @Attribute
    var prefix = ""

    @Attribute
    var count = 16

    override fun activated() {
        super.activated()

        for (i in 1 until count ) {
            val foo = if (i < 10) "0$i" else "$i"
            createInGrid( prefix + foo )
        }
    }

    fun createInGrid( sceneName : String ) {

        val gameInfo = Game.instance.resources.gameInfo

        val xMargin = 40
        val width = (gameInfo.width - xMargin) / 4.0 - xMargin
        val height = gameInfo.height * width / gameInfo.width
        val yMargin = (gameInfo.height - height * 4) / 5
        
        val left = xMargin + thumbX * (width + xMargin)
        val bottom = 20 + gameInfo.height - height - yMargin - thumbY * (height + yMargin)

        val button = createThumbButton( sceneName, left, bottom, width, height )
        createLiveThumb( button )
 
        thumbX ++
        if (thumbX >= 4) {
            thumbX = 0
            thumbY ++
        }
    }

    fun createThumbButton( sceneName : String, left : double, bottom : double, width : double, height : double ) : ThumbButton {

        val button = ThumbButton()
        button.scene = sceneName
        val costume = Resources.instance.costumes.find( "thumbButton" )

        val buttonA = Actor( costume, button )
        buttonA.appearance = TiledAppearance( buttonA, costume.choosePose("default") )
        buttonA.x = left
        buttonA.y = bottom
        //buttonA.appearance.size.x = width
        //buttonA.appearance.size.y = height
        buttonA.stage = Game.instance.scene.findStage( "menu" )

        return button
    }

}