class RestService {

private init(){}
static let shared = RestService()
var loginData:NSDictionary?


class func getCertificates() -> [SecCertificate]{
    let url = Bundle.main.url(forResource: "certf", withExtension: "cer")!
    let localCertificate = try! Data(contentsOf: url) as CFData
    guard let certificate = SecCertificateCreateWithData(nil, localCertificate) else {return[]}
    return [certificate]
}

let almgr:Alamofire.SessionManager = {
    let certificates = getCertificates()
    let trustPolicy = ServerTrustPolicy.pinCertificates(certificates: certificates, validateCertificateChain: true, validateHost: true)
    let serverTrustPolicies = ["liper":trustPolicy]
    let serverTrustPolicyManager = ServerTrustPolicyManager(policies: serverTrustPolicies)

    let configuration = URLSessionConfiguration.default
    configuration.httpAdditionalHeaders = Alamofire.SessionManager.defaultHTTPHeaders
    let man = Alamofire.SessionManager(configuration: URLSessionConfiguration.default, serverTrustPolicyManager: serverTrustPolicyManager)
    return man
}()


func loginRest(login:String, password:String, deviceId:String, completion:@escaping(_ response:AnyObject?, _ _message: String?, _ _success:Bool)->()){

    let params = ["login":login, "password":password, "deviceId":deviceId]

    let urlStr = restServices.REST_MAIN_URL + restServices.REST_LOGIN

    postRestService(urlString: urlStr, params: params as [String:AnyObject]) { (response, message, status) in
        print(response ?? "Error")
        let result = RestService()
        if let data = response as? NSDictionary {
            print(data)
            result.loginData = data
            completion(result, "Success", true)
        } else {
            completion("" as AnyObject?, "Failed", false)
        }
    }

}


func postRestService(urlString:String, params: [String:AnyObject], completion: @escaping (_ response:AnyObject?, _ message:String?, _ success:Bool)-> Void){
    alamofireFunction(urlString: urlString, method: .post, parameters: params) { (response, message, success) in
        if response != nil {
            completion(response as AnyObject?, "", true)
        } else {
            completion(nil, "", false)
        }
    }
}

func alamofireFunction(urlString:String, method:Alamofire.HTTPMethod, parameters:[String:AnyObject], completion: @escaping (_ response:AnyObject?, _ message:String?, _ success:Bool)-> Void){
    if method == Alamofire.HTTPMethod.post{
        almgr.request(urlString, method: .post, parameters: parameters, encoding: URLEncoding.default, headers: nil).responseJSON {(response:DataResponse<Any>) in


            if response.result.isSuccess{
                completion(response.result.value as AnyObject?, "", true)
            } else {
                completion(nil, "", false)
            }
        }
    } else {
        almgr.request(urlString).responseJSON { (response) in
            if response.result.isSuccess {
                completion(response.result.value as AnyObject?, "", true)
            } else {
                completion(nil, "", false)
            }
        }

    }
}

func loginWithRest(){
    let passHashed = "432asadadadas352addasadad"
    RestService.shared.loginRest(login: "patient997@liker.com, password: passHashed, deviceId: "123156") { (result, message, status) in
        if status {
            let loginDetails = result as? RestService
            self.loginDictionary = loginDetails?.loginData
            if self.loginDictionary?["status"] as? String == "error"{
                print("RESTSERVICES, Login Error, (String(describing: self.loginDictionary?["message"] as? String))")
            } else if self.loginDictionary?["status"] as? String == "ok" {
                print("RESTSERVICES, LOGIN SUCCESS")
            } else {
                print("RESTSERVICES (String(describing: self.loginDictionary?["message"] as?String))")
            }
        } else {
            print("RESTSERICES, status is false")
        }
    }

2018-01-17 15:43:16.129249+0100 ios-moe[5716:2789249] Task <67AFC6DA-9EFB-47D2-A5B0-FDAA3CC5285A>.<4> HTTP load failed (error code: -999 [1:89])
2018-01-17 15:43:16.129275+0100 ios-moe[5716:2789364] Task <67AFC6DA-9EFB-47D2-A5B0-FDAA3CC5285A>.<4> finished with error - code: -999
Error
RESTSERICES, status is false