PadelClub/PadelClub/Views/User/ShareModelView.swift

//
//  UserSearchView.swift
//  PadelClub
//
//  Created by Laurent Morvillier on 03/12/2024.
//

import Combine
import LeStorage
import SwiftUI
import PadelClubData

struct ShareModelView<T: SyncedStorable> : View {
    
    @StateObject private var viewModel = UserSearchViewModel()

    let instance: T
    
    var body: some View {
        NavigationView {
            if !self.viewModel.availableUsers.isEmpty {
                List {
                    ForEach(self.viewModel.availableUsers, id: \.id) { user in
                        let isSelected = viewModel.contains(user.id)
                        UserRow(user: user, isSelected: isSelected)
                            .contentShape(Rectangle())
                            .onTapGesture {
                                self.viewModel.userTapped(user.id)
                                self._modifyAuthorizedUsersList()
                            }
                    }
                }
                .toolbar {
                    ToolbarItem(placement: .topBarTrailing) {
                        SupportButtonView(supportButtonType: .supervisorRequest)
                    }
                }
                .navigationTitle("Partager à vos superviseurs")
                .navigationBarTitleDisplayMode(.inline)
                .toolbarBackground(.visible, for: .navigationBar)
            } else {
                ContentUnavailableView {
                    Label("Aucun superviseurs", systemImage: "person.crop.circle.badge.xmark")
                } description: {
                    Text("Si vous souhaitez partager votre tournoi avec d'autres utilisateurs, veuillez contacter notre support")
                } actions: {
                    SupportButtonView(supportButtonType: .supervisorRequest)
                }
            }
            
        }.onAppear {
            self.viewModel.selectedUsers = StoreCenter.main.authorizedUsers(for: self.instance.stringId)
        }
    }

    fileprivate func _modifyAuthorizedUsersList() {
        do {
            try StoreCenter.main.setAuthorizedUsers(for: self.instance, users: self.viewModel.selectedUsers)
        } catch {
            Logger.error(error)
        }

    }
}

struct UserRow: View {
    let user: ShortUser
    let isSelected: Bool

    var body: some View {
        HStack {
            Text("\(user.firstName) \(user.lastName)")
            Spacer()
            if self.isSelected {
                Image(systemName: "checkmark").foregroundStyle(.logoOrange)
            }
        }
        .padding(.vertical, 4)
    }
}

class UserSearchViewModel: ObservableObject {
    
    @Published var searchText = ""
    @Published var availableUsers: [ShortUser] = []
    @Published var selectedUsers: [String] = []

    init() {
        Task {
            do {
                let service = try StoreCenter.main.service()
                let shortUsers = try await service.getUserAgents()
                await self.setAvailableUsers(shortUsers)
            } catch {
                Logger.error(error)
            }
        }
    }
    
    @MainActor
    func setAvailableUsers(_ users: [ShortUser]) {
        self.availableUsers = users
    }
    
    func userTapped(_ user: String) {
        if let index = self.selectedUsers.firstIndex(of: user) {
            self.selectedUsers.remove(at: index)
        } else {
            self.selectedUsers.append(user)
        }
    }
    
    func contains(_ user: String) -> Bool {
        return self.selectedUsers.firstIndex(of: user) != nil
    }
}

// Preview provider
struct ShareModelView_Previews: PreviewProvider {
    static var previews: some View {
        ShareModelView(instance: Tournament.fake())
    }
}