//
//  ContentView.swift
//  Shared
//
//  Created by Sergey Tarasov on 24.07.2022.
//

import SwiftUI

struct ContentView: View {
    @ObservedObject var contactsViewModel: ChatListViewModel = ChatListViewModel()
    @ObservedObject var roomsViewModel: RoomsListViewModel = RoomsListViewModel()
    @ObservedObject var loginViewModel: LoginViewModel = LoginViewModel()

    @State var authStatus: Bool = false
    @State var selectedTab: Tab = .rooms
    var body: some View {
        Group {
            if authStatus {
                NavigationView {
                    TabView(selection: $selectedTab) {
                        ChatListView(viewModel: contactsViewModel)
                            .navigationViewStyle(StackNavigationViewStyle())
                            .tabItem {
                                Label("Контакты", systemImage: "person.crop.circle")
                            }
                            .tag(Tab.contacts)

                        RoomsListView(viewModel: roomsViewModel)
                            .navigationViewStyle(StackNavigationViewStyle())
                            .tabItem {
                                Label("Чаты", systemImage: "bubble.left.and.bubble.right")
                            }
                            .tag(Tab.rooms)

                        Text("")
                            .navigationBarTitleDisplayMode(.inline)
                            .navigationViewStyle(StackNavigationViewStyle())
                            .tabItem {
                                Label("Настройки", systemImage: "gear")
                            }
                            .tag(Tab.settings)
                    }
                    .navigationBarTitle(returnNaviBarTitle(tabSelection: self.selectedTab))
                }
            } else {
                LoginView(viewModel: loginViewModel, authStatus: $authStatus)
            }
        }
    }

    func returnNaviBarTitle(tabSelection: Tab) -> String {
        switch tabSelection {
        case .contacts: return "Контакты"
        case .rooms: return "Чаты"
        case .settings: return "Настройки"
        }
    }

    enum Tab {
        case contacts
        case rooms
        case settings
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}