omnivore/apple/OmnivoreKit/Sources/App/Views/Profile/RecommendationGroupsView.swift

#if os(iOS)
  import Models
  import Services
  import SwiftUI
  import Views

  @MainActor final class RecommendationsGroupsViewModel: ObservableObject {
    @Published var isLoading = false
    @Published var isCreating = false
    @Published var networkError = false
    @Published var recommendationGroups = [InternalRecommendationGroup]()

    @Published var showCreateSheet = false

    @Published var showCreateError = false
    @Published var createGroupError: String?

    @Published var onlyAdminCanPost = false
    @Published var onlyAdminCanSeeMembers = false

    func loadGroups(dataService: DataService) async {
      isLoading = true

      do {
        recommendationGroups = try await dataService.recommendationGroups()
      } catch {
        networkError = true
      }

      isLoading = false
    }

    func createGroup(dataService: DataService, name: String) async {
      isCreating = true

      let group = try? await dataService.createRecommendationGroup(name: name,
                                                                   onlyAdminCanPost: onlyAdminCanPost,
                                                                   onlyAdminCanSeeMembers: onlyAdminCanSeeMembers)

      if group != nil {
        await loadGroups(dataService: dataService)
        showCreateSheet = false
      } else {
        createGroupError = "Error creating club"
        showCreateError = true
      }

      isCreating = false
    }
  }

  struct CreateRecommendationGroupView: View {
    @State var name = ""
    @EnvironmentObject var dataService: DataService
    @StateObject var viewModel = RecommendationsGroupsViewModel()

    var nextButton: some View {
      if viewModel.isCreating {
        return AnyView(ProgressView())
      } else {
        return AnyView(Button(action: {
          Task {
            await viewModel.createGroup(dataService: dataService, name: self.name)
          }
        }, label: {
          Text(LocalText.genericNext)
        })
          .disabled(name.isEmpty)
        )
      }
    }

    var body: some View {
      NavigationView {
        Form {
          TextField(LocalText.genericName, text: $name, prompt: Text(LocalText.clubsName))

          Section("Club Rules") {
            Toggle("Only admins can post", isOn: $viewModel.onlyAdminCanPost)
            Toggle("Only admins can see members", isOn: $viewModel.onlyAdminCanSeeMembers)
          }

          Section {
            Section {
              Text("""
              [Learn more about clubs](https://blog.omnivore.app/p/dca38ba4-8a74-42cc-90ca-d5ffa5d075cc)
              """)
                .accentColor(.blue)
            }
          }
        }
        .alert(isPresented: $viewModel.showCreateError) {
          Alert(
            title: Text(viewModel.createGroupError ?? "Error creating group"),
            dismissButton: .cancel(Text(LocalText.genericOk)) {
              viewModel.createGroupError = nil
              viewModel.showCreateError = false
            }
          )
        }
      }
      #if os(iOS)
        .navigationViewStyle(.stack)
        .navigationBarTitleDisplayMode(.inline)
        .navigationBarItems(leading:
          Button(action: {
            viewModel.showCreateSheet = false
          }, label: { Text(LocalText.cancelGeneric) }),
          trailing: nextButton)
      #endif
      .navigationTitle("Create Club")
    }
  }

  struct GroupsView: View {
    @EnvironmentObject var dataService: DataService
    @StateObject var viewModel = RecommendationsGroupsViewModel()

    var body: some View {
      Group {
        #if os(iOS)
          Form {
            innerBody
          }
        #elseif os(macOS)
          List {
            innerBody
          }
          .listStyle(InsetListStyle())
        #endif
      }
      .sheet(isPresented: $viewModel.showCreateSheet) {
        NavigationView {
          CreateRecommendationGroupView(viewModel: self.viewModel)
        }
      }
      .task { await viewModel.loadGroups(dataService: dataService) }
      .navigationTitle(LocalText.clubsGeneric)
    }

    private var innerBody: some View {
      Group {
        Section {
          Button(
            action: { viewModel.showCreateSheet = true },
            label: {
              HStack {
                Image(systemName: "plus.circle.fill").foregroundColor(.green)
                Text(LocalText.clubsCreate)
                Spacer()
              }
            }
          )
        }

        if !viewModel.isLoading {
          if viewModel.recommendationGroups.count > 0 {
            Section(header: Text(LocalText.clubsYours)) {
              ForEach(viewModel.recommendationGroups) { recommendationGroup in
                let viewModel = RecommendationsGroupViewModel(recommendationGroup: recommendationGroup)
                NavigationLink(
                  destination: RecommendationGroupView(viewModel: viewModel)
                ) {
                  Text(recommendationGroup.name)
                }
              }
            }
          } else {
            Section {
              Text(LocalText.clubsNotAMemberMessage)
                .accentColor(.blue)
            }
          }
        }
      }
    }
  }
#endif