import VNPTSmartCAiOSSDK // You need import before using

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
    VNPTSmartCATransaction.receiveBackLink(url: url, sourceApp: sourceApplication!)
    return true
}

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any]) -> Bool {
    VNPTSmartCATransaction.receiveBackLink(url: url, sourceApp: "")
    return true
}

import VNPTSmartCAiOSSDK // You need import before using

func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
    VNPTSmartCATransaction.receiveBackLink(url: URLContexts.first!.url, sourceApp: "")
}

import VNPTSmartCAiOSSDK // You need import before using

override func viewDidLoad() {
    //STEP 1: addObserver Notification
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name(rawValue: "<VNPTSmartCA>NotificationCenterReceived"), object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(self.NotificationCenterTokenReceived), name:NSNotification.Name(rawValue: "<VNPTSmartCA>NotificationCenterReceived"), object: nil)
    
    //STEP 2: INIT TRANSACTION BASIC INFO AS CLIENT ID AND TRAN ID
    let tranInfo: NSMutableDictionary = NSMutableDictionary()

    tranInfo["clientId"] = "partnerSchemeId" // You need pass your client ID replace for 'partnerSchemeId'.
    tranInfo["tranId"] = "transactionId" // You need pass your transaction ID replace for 'transactionId'.
    
    VNPTSmartCATransaction.setEnvironment(_environment: VNPTSmartCATransaction.ENVIRONMENT.DEMO)
    VNPTSmartCATransaction.createTransactionInformation(info: tranInfo)
    
    //STEP 3: INIT LAYOUT - ADD BUTTON OPEN VNPTSMARTCA
    let buttonOpen = UIButton()
    buttonOpen.frame = CGRect(x: 20, y: 200, width: 260, height: 40)
    buttonOpen.setTitle("Open VNPT SmartCA", for: .normal)
    buttonOpen.setTitleColor(UIColor.white, for: .normal)
    buttonOpen.titleLabel!.font = UIFont.systemFont(ofSize: 15)
    buttonOpen.backgroundColor = UIColor.blue
    
    buttonOpen.addTarget(self, action: #selector(self.openApp), for: .touchUpInside)
    self.view.addSubview(buttonOpen)
}

@objc func openApp() {
    VNPTSmartCATransaction.handleOpen()
}
// You can listen return event from VNPTSmartCA app in here
@objc func NotificationCenterTokenReceived(notify: NSNotification) {
    let response: NSMutableDictionary = notify.object! as! NSMutableDictionary
        
    let _statusStr = "\(response["status"] as! String)"
    let _message = response["message"]
    
    if (_statusStr == "0") {
        print("Status code: \(_statusStr)")
        print("Message:", _message as! String)
    } else {
        
    }
}