//
//  RNOnfidoSdk.swift
//  RNOnfidoSdk
//
//  Created by Pooja Pandey on 01/04/20.
//  Copyright © 2020 Facebook. All rights reserved.
//

import Foundation
import Onfido

@objc(OnfidoSDK)
class OnfidoSDK: NSObject {
  @objc func startSDK(_ applicantID: String,
                      resolver resolve: @escaping RCTResponseSenderBlock,
                      rejecter reject: @escaping RCTResponseSenderBlock) -> Void {
    DispatchQueue.main.async {
      self.run(withApplicationID: applicantID, resolver: resolve, rejecter: reject)
    }
  }
  
  private func run(withApplicationID id: String,
                   resolver resolve: @escaping RCTResponseSenderBlock,
                   rejecter reject: @escaping RCTResponseSenderBlock) {
//    let token = "live_ihoVhiXHdriNY2PqxU2HmN5SzB1giRtE"
    let onfidoToken = Bundle.main.infoDictionary!["OnfidoToken"] as! String
    let onfidoConfig = try! OnfidoConfig.builder()
      .withToken(onfidoToken)
      .withApplicantId(id)
      .withDocumentStep(ofType: .passport, andCountryCode: "")
      .withFaceStep(ofVariant: .photo(withConfiguration: nil))
      .build()
    
    let onfidoFlow = OnfidoFlow(withConfiguration: onfidoConfig)
      .with(responseHandler: { [weak self] response in
        switch response {
        case let .error(error):
          self?.dismiss()
          reject([error.localizedDescription])
        case .success(_):
          self?.dismiss()
          resolve([id])
        case .cancel:
          self?.dismiss()
        }
      })
    do {
      let onfidoRun = try onfidoFlow.run()
      UIApplication.shared.windows.first?.rootViewController?.present(onfidoRun, animated: true)
    } catch {
      // iOS simulator does not work because of camera
      showAlert(message: "Couldn't start Onfido flow...(iOS Simultor does not work)")
    }
  }
  
  private func showAlert(message: String) {
    let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
    let action = UIAlertAction(title: "OK", style: .default) { [weak self] action in
      self?.dismiss()
    }
    alert.addAction(action)
    if let vc = UIApplication.shared.windows.first?.rootViewController?.presentedViewController {
      vc.present(alert, animated: true)
    } else if let vc = UIApplication.shared.windows.first?.rootViewController {
      vc.present(alert, animated: true)
    }
  }
  
  private func dismiss() {
    UIApplication.shared.windows.first?.rootViewController?.presentedViewController?.dismiss(animated: true)
  }
}