import SwiftUI

public struct CaseIterablePicker<Label, Content>: View 
where Content: CaseIterable,
      Content: CustomStringConvertible,
      Content: Hashable,
      Content: Identifiable,
      Content.AllCases: RandomAccessCollection,
      Label: View
{

  let label: () -> Label
  @Binding<Content> var selection: Content

  public init(
    selection: Binding<Content>,
    @ViewBuilder label: @escaping () -> Label
  ) {
    self.label = label
    self._selection = selection
  }

  public var body: some View {
    Picker(selection: $selection, label: label()) {
      ForEach(Content.allCases) {
        Text($0.description)
          .tag($0)
      }
    }
  }
}

extension CaseIterablePicker where Label == Text {

  public init<S: StringProtocol>(_ title: S, selection: Binding<Content>) {
    self.init(selection: selection) {
      Text(title)
    }
  }
}