import static uk.co.nickthecoder.foocad.pathextrude.v1.PathExtrude.*
import static uk.co.nickthecoder.foocad.chamferedextrude.v1.ChamferedExtrude.*

class SHanger : Model {
    
    @Custom( about="Diameter of the top (large) hook" )
    var topD = 50
    @Custom( about="Diameter of the bottom (small) hook" )
    var bottomD = 10

    @Custom( about="Extra length at the top (large) hook" )
    var topExtra = 0

    @Custom( about="Extra length at the bottom (small) hook" )
    var bottomExtra = 7

    @Custom( about="Width (x)" )
    var width = 4.0

    @Custom( about="Thickness (z)" )
    var thickness = 4.0

    @Custom
    var chamfer = 1.0

    fun path() = PolygonBuilder().apply {
        moveTo(0,0)
        if( topExtra> 0 ) {
            lineBy(0,topExtra)
        }
        circularArcBy(topD, 0, topD/2, false, false)
        if( topExtra> 0 ) {
            lineBy(0,-topExtra)
        }
        bezierBy(
            Vector2(0,(-bottomD-topD)/2),
            Vector2(0,(-bottomD-topD)/2),
            Vector2( -topD/2-bottomD/2, -topD*0.7 - bottomD*0.7 )
        )
        lineBy(0,-bottomExtra)
        circularArcBy(bottomD, 0, bottomD/2, false, true)
        lineBy(0,bottomExtra)
    }.buildPath()
  
    override fun build() : Shape3d {
        return path().thickness( width ).chamferedExtrude( thickness, chamfer )
    }
}