import NetworkExtension
import UIKit
import OpenVPNAdapter
import WebKit

class ViewController: UIViewController {

    @IBOutlet weak var webView: WKWebView!

    var providerManager: NETunnelProviderManager? {
        didSet {
            provideVPNSettings()
        }
    }

    lazy var options = ["Settings": getOpenVPNData()!,
                        "Username": "anton.klymenko", // anton.klymenko-su-kh
                        "Password": "+M6O$aIVC8^bMj20"] as! [String: NSObject]

    override func viewDidLoad() {
        super.viewDidLoad()
        setupDelegate()

        startVPN()
    }

    func startVPN() {
        NETunnelProviderManager.loadAllFromPreferences { (managers, error) in
            guard error == nil else {
                return
            }
            self.providerManager?.isOnDemandEnabled = true

            if managers?.first == nil {
                self.providerManager = NETunnelProviderManager()
            } else {
                self.providerManager = managers?.first
            }
        }
    }

    func provideVPNSettings() {
        providerManager?.loadFromPreferences { (error) in
            guard error == nil else {
                print("loadFromPreferences failed: \(String(describing: error?.localizedDescription)) ")
                return
            }
        }

        guard
            let configurationFileURL = Bundle.main.url(forResource: "anton.klymenko-su-kh", withExtension: "ovpn"),
            let configurationFileContent = try? Data(contentsOf: configurationFileURL)
            else {
                fatalError()
        }

        let tunnelProtocol = NETunnelProviderProtocol()
        tunnelProtocol.serverAddress = ""
        tunnelProtocol.providerBundleIdentifier = "Sigma-Software.ETS-Mobile.VPN.Extension"
        tunnelProtocol.providerConfiguration = ["ovpn": configurationFileContent]
        tunnelProtocol.username = "anton.klymenko"
        tunnelProtocol.passwordReference = Data("+M6O$aIVC8^bMj20".utf8)


        //            tunnelProtocol.passwordReference = ",YkGu&8+lCl6hlU8".data(using: .utf8)
        print("UserName: \(String(describing: tunnelProtocol.username))")
        print("Password: \(String(describing: tunnelProtocol.passwordReference))")

        self.providerManager?.protocolConfiguration = tunnelProtocol
        self.providerManager?.localizedDescription = "OpenVPN ETS"
        self.providerManager?.isEnabled = true

        self.providerManager?.saveToPreferences(completionHandler: { error in
            if error != nil {
                print(error ?? "Error Line: 68")
            } else {
                print("providerManager.saveToPreferences is OK")
            }
        })

        do {
            try self.providerManager?.connection.startVPNTunnel()
        } catch {
            print("startVPNTunnel failed")
        }
    }

    func setupDelegate() {
        webView.navigationDelegate = self
    }

    @IBAction func goToGoole(_ sender: UIButton) {
        let googleUrl = URL(string: "https://google.com")
        let googleRequest = URLRequest(url: googleUrl!)
        webView.load(googleRequest)
    }

    @IBAction func goToETS(_ sender: UIButton) {
        let etsUrl = URL(string: "https://blog.i.sigmaukraine.com/")
        let etsRequest = URLRequest(url: etsUrl!)
        webView.load(etsRequest)
    }

    func getOpenVPNData() -> Data? {
        if let path = Bundle.main.path(forResource: "anton.klymenko-su-kh", ofType: "ovpn") {
            do {
                let fileSource = try Data(contentsOf: URL(fileURLWithPath: path))
                return fileSource
            } catch {
                print(error)
            }
        }
        return nil
    }
}

extension ViewController: WKNavigationDelegate {

}