import SwiftUI

class Store: ObservableObject {
  @Published var colors: [Color] = []
}

final class GradientViewProxy: UIView {
  private var store: Store = .init()
  private var gradientView: UIView?

  override init(frame: CGRect) {
    super.init(frame: frame)
    let vc = UIHostingController(rootView: GradientView().environmentObject(store))
    vc.view.frame = bounds
    addSubview(vc.view)
    gradientView = vc.view
  }

  override func layoutSubviews() {
    super.layoutSubviews()
    gradientView?.frame = bounds
  }

  required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  @objc var colors: [UIColor]? {
    didSet {
      if let colors {
        store.colors = colors.map { Color.convert(fromUIColor: $0) }
      }
    }
  }
}