import SwiftUI

struct RenderingStyle {
  var opacity: CGFloat = 1.0
  var transform: TransformStyle?
}

struct RenderingModifier: ViewModifier {
  let style: RenderingStyle

  func body(content: Content) -> some View {
    content
      .opacity(style.opacity)
      .modifier(TransformModifier(transform: style.transform))
  }
}

struct TransformModifier: ViewModifier {
  let transform: TransformStyle?

  func body(content: Content) -> some View {
    content
      .voltraIfLet(transform?.rotate) { view, degrees in
        view.rotationEffect(.degrees(degrees))
      }
      .voltraIfLet(transform?.scale) { view, scale in
        view.scaleEffect(scale)
      }
      .voltraIf(transform?.scale == nil && (transform?.scaleX != nil || transform?.scaleY != nil)) { view in
        view.scaleEffect(x: transform?.scaleX ?? 1.0, y: transform?.scaleY ?? 1.0)
      }
  }
}