// MARK: Example View

struct FeaturesView_SwitchCaseLet: View {
  let store: Store<AppState, AppAction>
  let delayedAction: AppAction

  init(store: Store<AppState, AppAction>, afterDelaySend action: AppAction) {
    self.store = store
    self.delayedAction = action
  }

  var body: some View {
    SwitchStore(store) {
      CaseLet(
        state: /AppState.featureOne,
        action: AppAction.featureOne,
        then: FeatureView.init(store:)
      )
      CaseLet(
        state: /AppState.featureTwo,
        action: AppAction.featureTwo,
        then: FeatureView.init(store:)
      )
      CaseLet(
        state: /AppState.featureThree,
        action: AppAction.featureThree,
        then: FeatureView.init(store:)
      )
    }
    .onAppear {
      DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
        ViewStore(store).send(delayedAction)
      }
    }
  }
}

// MARK: Previews

struct ExclusiveFeatureState_Previews: PreviewProvider {
  static var previews: some View {
    Group {
      FeaturesView_SwitchCaseLet(
        store: Store(
          initialState: .featureOne(.init(title: "Feature One")),
          reducer: appReducer,
          environment: ()
        ),
        afterDelaySend: .toggleFeatureTwo
      )
      FeaturesView_SwitchCaseLet(
        store: Store(
          initialState: .featureTwo(.init(title: "Feature Two")),
          reducer: appReducer,
          environment: ()
        ),
        afterDelaySend: .toggleFeatureThree
      )
      FeaturesView_SwitchCaseLet(
        store: Store(
          initialState: .featureThree(.init(title: "Feature Three")),
          reducer: appReducer,
          environment: ()
        ),
        afterDelaySend: .toggleFeatureOne
      )
    }
  }
}