import SwiftUI


struct ContentView: View {
    @State private var users = [User]()

    var body: some View {
        NavigationView() {
            List(users) { user in
                NavigationLink {
                    UserView(user: user)
                } label: {
                    HStack {
                        Circle()
                            .fill(user.isActive ? .green : .red)
                            .frame(width: 30)
                        VStack(alignment: .leading) {
                            Text(user.name)
                                .font(.title3)
                            Text(user.email)
                                .font(.caption2)
                        }
                    }
                }
            }
            .navigationTitle("FriendFace")
            .task {
                await fetchUsers()
            }
        }
    }

    func fetchUsers() async {
        guard users.isEmpty else { return }

        do {
            let url = URL(string: "https://www.hackingwithswift.com/samples/friendface.json")!
            let (data, _) = try await URLSession.shared.data(from: url)

            let decoder = JSONDecoder()
            decoder.dateDecodingStrategy = .iso8601
            users = try decoder.decode([User].self, from: data)
        } catch {
            print("Download failed")
        }
    }
}

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