//
//  NoteBiometricViewController.swift
//  Friendvatars
//
//  Created by Dawid Kubicki on 19/11/2018.
//  Copyright © 2018 Razeware. All rights reserved.
//

import UIKit
import KeychainAccess

func randomSecret(length: Int = 10) -> String {
  let base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
  var randomString: String = ""
  
  for _ in 0..<length {
    let randomValue = arc4random_uniform(UInt32(base.count))
    randomString += "\(base[base.index(base.startIndex, offsetBy: Int(randomValue))])"
  }
  return randomString.sha1()
}

class NoteBiometricViewController: UIViewController {

  @IBAction func isSignOut(_ sender: Any) {
    try? AuthController.signOut()
  }
    @IBOutlet weak var txtSecret: UITextField!
    @IBOutlet weak var imgBio: UIImageView!
    @IBOutlet weak var lblSecret: UILabel!
  
  let keychain = Keychain(service: "com.dawidkubicki.Friendvatars")
  
    override func viewDidLoad() {
        super.viewDidLoad()

      if(biometricType == .touchID) {
        imgBio.image = UIImage(named: "TouchID")
      } else if(biometricType == .faceID) {
        imgBio.image = UIImage(named: "FaceID")
      } else if(biometricType == .none) {
        print("Nie ma możliwości użycia biometrycznego uwierzytelniania")
      }
    }
  
  
  
  let secret = randomSecret()
  
    @IBAction func storeSecret(_ sender: Any) {
      DispatchQueue.global().async {
        do {
        try self.keychain
          .accessibility(.whenPasscodeSetThisDeviceOnly, authenticationPolicy: .userPresence)
          .set(self.txtSecret.text!, key: self.secret)
        } catch let error {
          print(error)
        }
      }
    }
    
    @IBAction func getSecret(_ sender: Any) {
      DispatchQueue.global().async {
        do {
          let secret = try self.keychain
          .authenticationPrompt("Zaloguj się biometrycznie, aby zobaczyć notatkę")
            .get(self.secret)
          self.lblSecret.text = "Twoja ukryta notatka to: \(secret!)"
        } catch let error {
          print(error)
        }
      }
    }
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}