import UIKit

class TableViewCell: UITableViewCell {
    let network = Network()
    var bynString: String!

    @IBOutlet weak var bynTextField: UITextField!
    @IBOutlet weak var outputLabel: UILabel!

    private let apikey = "71f3bc8d41181084e31b"
    private let url = "https://free.currconv.com/api/v7/convert"
    private var myCurrency: Response?

    func getCurrentCurrency(complition: @escaping (Response)->Void) {
        var urlComponents = URLComponents(string: url)
        urlComponents?.queryItems = [
            URLQueryItem(name: "q", value: "USD_BYN,BYN_USD"),
            URLQueryItem(name: "compact", value: "ultra"),
            URLQueryItem(name: "apiKey", value: "\(apikey)")
        ]
        let url = urlComponents?.url

        let task = URLSession.shared.dataTask(with: url!) {
            (data, response, error) in

            guard let data = data else { return }
            guard let currency: Response = try? JSONDecoder().decode(Response.self, from: data) else {
                print("Error can't parse")
                return
            }
            return complition(currency)
        }
        task.resume()

    }



    override func awakeFromNib() {
        super.awakeFromNib()
        bynTextField.delegate = self
        getCurrentCurrency {
            (myCurrency) in
        }

    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}

    extension TableViewCell: UITextFieldDelegate {
        func textFieldDidBeginEditing(_ textField: UITextField) {
            if textField == bynTextField {
                if myCurrency?.usd_byn != nil {
                if textField.text != nil {
                    let doubleText = Double(textField.text!)
                    let result = doubleText! / (myCurrency?.byn_usd!)!
                    outputLabel.text = String(result)
                }
            }
        }
    }
    }