AuthViewModel.swift

import SwiftUI
import Firebase
import LocalAuthentication

class AuthViewModel: ObservableObject {
    
    @Published var userSession: FirebaseAuth.User?
    @Published var showError: Bool = false
    @Published var msgError: String = ""
    @Published var email = ""
    @Published var password = ""
    
    
    // Mark: FaceID Propreties
    @AppStorage("use_face_id") var useFaceID: Bool = false
    @AppStorage("use_face_email") var faceEmail: String = ""
    @AppStorage("use_face_password") var facePassword: String = ""
    
    
    @AppStorage("log_status") var logStatus: Bool = false
    
    static let shared = AuthViewModel()
    
    init(){
        userSession = Auth.auth().currentUser
    }
    
    
    // Mark : Firebase Login
    func login(useFaceID: Bool, email: String = "", password: String = "" ) async throws {
        
        let result = try await Auth.auth().signIn(withEmail: email != "" ? email : self.email , password: password != "" ? password : self.password)
        
        DispatchQueue.main.async {
            if useFaceID {
                print(" test login => \(useFaceID)")
                // Mark: Storing for future face Id Login
                self.useFaceID = useFaceID
                self.faceEmail = self.email
                self.facePassword = self.password
            }
            
            self.userSession = result.user
        }
        
        

    }
    
    // Mark: FaceID usage
    func getBioMetricStatus() -> Bool {
        let scanner = LAContext()
        
        return scanner.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: .none)
    }
    
    // Mark: FaceID login
    func authenticateUser() async throws {
        let status = try await LAContext().evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: "Login pour l'application")
        if status {
            print(self.facePassword)
            print(self.faceEmail)
            try await login(useFaceID: useFaceID, email: self.faceEmail, password: self.facePassword)
        }
    }
    
    
    func signout() {
        self.userSession = nil
        try? Auth.auth().signOut()
    }
    
    
}