import SwiftUI

struct LoginView: View {
    @State var username: String = ""
    @State var password: String = ""

    @State var loggedIn = false

    @State var loginMessage: String = ""

    func logMeIn() {
        self.loggedIn.toggle()

        self.loginMessage = "Hello \(self.username)"

    }

    var body: some View {
        Form {
                TextField("Username", text: $username)
                    .textFieldStyle(RoundedBorderTextFieldStyle())
                    .padding()

                TextField("Password", text: $password)
                    .textFieldStyle(RoundedBorderTextFieldStyle())
                    .padding()

            HStack {  if !loggedIn {
                if self.username.count > 0 {
                    Button( action:logMeIn){
                        Text("Login")
                    }
                }
            } else {
                    Text(loginMessage)
                } }
        }
    }
}

#if DEBUG
struct LoginView_Previews: PreviewProvider {
    static var previews: some View {

            LoginView()

    }
}
#endif