dependencies: [
    .package(url: "https://github.com/ottuco/ottu-ios-sdk.git")
]

import Ottu

class ViewController: UIViewController,OttuDelegate {

    var responseDict : [String:Any]?
    var message = ""
    
    //apikey: You will get the apikey from Ottu
    //merchant_id: You will get the merchant id from Ottu
    //sessionid: You will get the sessionid from the public API
    //lang: This is for language. "en" for English and "ar" for Arabic
    override func viewDidLoad() {
        super.viewDidLoad()
        //Intiate the SDK accordingly after getting session id from the public API documentation.
        //session_id - It is generated when payment was created. See API documentation
        //merchant_id - Merchant domain. See API documentation.
        //apiKey - API Public key should be used. See API documentation.
        //lang - You can use it to change the language. We support two languages english and arabic. You can use "en" for english and "ar" for arabic.        
        let session_id = "ENTER_YOUR_SESSION_ID"
        _ = Ottu.init(session_id, merchant_id: "MERCHANT_ID", apiKey: "API_KEY" ,lang: "ENTER_LANGUAGE_ID_en_or_ar", viewController: self, delegate: self)
    }
    
    //The error callback is invoked when problems occur during a payment.
    //Reason will be defined in the response attribute. 
    func errorCallback(message: String, response: [String : Any]?) {
        responseDict = response
        self.message = "Error"
        self.dismissed()

    }
    
    //Called when a customer cancels the payment.
    func cancelCallback(message: String, response: [String : Any]?) {
        responseDict = response
        self.message = "Cancel"
        self.dismissed()
    }
    
    //Called when the payment completed successfully.
    func successCallback(message: String, response: [String : Any]?) {
        responseDict = response
        self.message = "Success"
        self.dismissed()
    }
    
    //It is a helper function that has to return a promise object, to create the redirect_url.
    //This allows the merchant to redirect the user to the cart page and wait for a while before creating the redirect_url. 
    //In case the customer changes items in the cart, the due amount will be updated accordingly, then the merchant will wait for a while until the customer does not return, then the function returns a promise object, the cart will be frozen and marked as submitted, and the redirect_url will be generated.
    func beforeRedirect() {
        
    }
    
    //After successCallback or cancelCallback or errorCallback you can show alert to the user accordingly.
    func dismissed() {
        DispatchQueue.main.asyncAfter(deadline: .now()+1) {
            let alert = UIAlertController(title: self.message.capitalized, message: "\(String(describing: self.responseDict))", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))
            self.present(alert, animated: true, completion: nil)
        }
    }
    
}

let session_id = "ENTER_YOUR_SESSION_ID"
_ = Ottu.init(session_id, merchant_id: "MERCHANT_ID", apiKey: "API_KEY" ,lang: "ENTER_LANGUAGE_ID_en_or_ar",formsOfPayment: ["applePay"], viewController: self, delegate: self)