class CallButtonHolder : Model {

    val hookSize = Vector2( 46, 20 )
    val hookThickness = 3
    val indent = 2

    val shelfThickness = 2
    val shelfSize = Vector2( 15,70 )
    val shelfWidth1 = 29
    val shelfWidth2 = 24

    fun hook() : Shape3d {
        val radius = hookSize.x/2 - hookThickness/2
        val foo = radius*0.4
        val profile = PolygonBuilder().apply {
            circularArcBy( foo, foo, foo, false, true )
            bezierBy( Vector2( 0, foo ), Vector2( 0, foo ), Vector2(-indent, radius ) )
            lineBy( 0, radius*0.1 )
            circularArcBy( radius *2, 0, radius, true, false )
            bezierBy( Vector2( 0,-foo ), Vector2( 0,-foo ), Vector2(-indent, -radius ) )
            circularArcBy( foo,-foo, foo, false, true )
            
        }.buildPath().thickness( hookThickness ).backTo(shelfThickness).centerX()

        return profile.extrude( hookSize.y )
    }


    fun shelf() : Shape3d {
        val main = ExtrusionBuilder().apply {
            crossSection( shelfCrossSection( shelfWidth1, shelfThickness ) )
            forward( shelfSize.y )
            crossSection( shelfCrossSection( shelfWidth2, shelfThickness ) )

        }.build()

        val end = shelfCrossSection(shelfWidth1 - 4*2, 4)
            .extrude( shelfThickness )
        return main + end
    }

    fun shelfCrossSection( width : double, thickness : double ) : Shape2d {
        return Square( width + thickness * 2, shelfSize.x ).centerX() -
            Square( width, shelfSize.x + 0.1 ).centerX().translateY(thickness )
        
    }

    @Slice(brimWidth=5, perimeters=6 )
    override fun build() = hook() + shelf() +
        Cube( 28, 23, 77 ).centerX().previewOnly()
}