//Calling Function code to generate OTP
   @IBAction func loginButtonTapped(_ sender: AnyObject) {
    print("mobile",self.textFieldPhoneNum.text!)

    guard (textFieldName.text?.characters.count)! > 0 && (textFieldPhoneNum.text?.characters.count)! == 10 else {
        _ = SCLAlertView().showError(errText, subTitle: INPUT_PHONE_ERR,closeButtonTitle: closeButtonTitle, colorStyle : SCLAlertViewStyle.easyPolicy.defaultColorInt)
        return
    }
    self.nsConstantMethods.putString(key: NS_NAME_KEY,value: textFieldName.text!)
    self.nsConstantMethods.putString(key: NS_PHONE_KEY,value: textFieldPhoneNum.text!)
    self.loginAPIManager.generateOTPService(name: textFieldName.text!,epAppRegID: "", mobile: self.textFieldPhoneNum.text!, success: { (data) -> Void in
        SVProgressHUD.dismiss()
        self.loginRespnse = data!
        self.nsConstantMethods.putInt(key: NS_CUSTOMERID_KEY,value:  self.loginRespnse.customerId)
        DispatchQueue.main.async {
            self.openOTPPopup()

        }
    }, failure: { (data) -> Void in
        SVProgressHUD.dismiss()
    })
}

//Function being called to generate OTP
import Foundation
import Swift
import Alamofire
import AlamofireObjectMapper
import ObjectMapper
import SVProgressHUD

public class LoginAPIManager {
var otp : Int! = 0

func generateOTPService(name : String,epAppRegID: String, mobile: String, success: @escaping (_ data: LoginResponse?) -> Void,failure: @escaping (_ _data: AnyObject?) -> Void) -> Void{
    print("mobile no ",mobile)
    let otpGenratorModel              = LoginOTP()
    otpGenratorModel.login            = OTPModel()
    otpGenratorModel.login.mobile     = mobile
    otpGenratorModel.login.deviceID   = DEVICE_ID
    otpGenratorModel.login.name       = name
    otpGenratorModel.login.epAppRegID = epAppRegID
    let i = Mapper<LoginOTP>().toJSON(otpGenratorModel)
    print("i",i.debugDescription)
    let otpResponse = OTPResponse()
    SVProgressHUD.show(withStatus: "Loading")
    SVProgressHUD.setDefaultStyle(SVProgressHUDStyle.dark)
    SVProgressHUD.setRingThickness(0.8)
    SVProgressHUD.setDefaultMaskType(SVProgressHUDMaskType.black)
    //network request to generate OTP
    Alamofire.request(BASE_URL + OTP_GENRATOR_URL, method: .post, parameters: i, encoding: JSONEncoding.default).responseObject( mapToObject: otpResponse) { responseObj in
        //switch to valide response
        switch responseObj.result{
        case .success(_):
            print("otp respoose",otpResponse.errorCode)

            //nested switch to validate response code
            switch otpResponse.errorCode{
            case SUCCESS_CODE?:
                DispatchQueue.global(qos: .background).async {
                    success(otpResponse.loginResponse)
                }
                self.otp = Int(otpResponse.loginResponse.OTP)!
                print("self.otp ",self.otp,otpResponse.loginResponse.OTP)
                break
            case DEFAULT_ERR_CODE?:
                _ = SCLAlertView().showError(errText, subTitle: errSubtext,closeButtonTitle: closeButtonTitle, colorStyle : SCLAlertViewStyle.easyPolicy.defaultColorInt)
                failure("default error" as AnyObject?)
                break
            case TIMEOUT_ERR?:
                _ = SCLAlertView().showError(timeOutErr, subTitle: errSubtext,closeButtonTitle: closeButtonTitle, colorStyle : SCLAlertViewStyle.easyPolicy.defaultColorInt)
                failure("Timeout error" as AnyObject?)
                break
            default :
                _ = SCLAlertView().showError(errText, subTitle: errSubtext,closeButtonTitle: closeButtonTitle, colorStyle : SCLAlertViewStyle.easyPolicy.defaultColorInt)
                failure("default error" as AnyObject?)

                break
            }
            break
        case .failure(let error):
            guard (error as NSError?) != nil else{
                return
            }
            print(error.localizedDescription)
            _ = SCLAlertView().showError("Oops Something Went wrong", subTitle: error.localizedDescription,closeButtonTitle:"OK", colorStyle : SCLAlertViewStyle.easyPolicy.defaultColorInt)
            break
        }
    }
}
}