LONDON-IOS/GMERemittance/Library/WebLinks/WkWebView/WkWebViewController.swift

//
//  WkWebViewController.swift
//  GME Remit
//
//  Created by Mac on 12/25/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import WebKit

class WkWebViewController: UIViewController {
  
  var webView: WKWebView!
  var url: String?
  var headers: [KftcHeader]?
  
  var activityIndicator: UIActivityIndicatorView?
  let userContentController = WKUserContentController()
  @IBOutlet weak var closeButton: UIBarButtonItem!
  
  override func viewDidLoad() {
    super.viewDidLoad()
    
    let preference = WKPreferences()
    preference.javaScriptEnabled = true
    let webConfiguration = WKWebViewConfiguration()
    
    userContentController.add(self, name: "test")
    
    webConfiguration.userContentController = userContentController
    webConfiguration.preferences = preference
    
    let webView = WKWebView.init(frame: view.frame, configuration: webConfiguration)
    webView.uiDelegate = self
    webView.navigationDelegate = self
    
    view = webView
    self.webView = webView
    
    activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
    webView.addSubview(activityIndicator!)
    webView.isUserInteractionEnabled = true
    activityIndicator?.startAnimating()
    activityIndicator?.isHidden = false
    activityIndicator?.hidesWhenStopped = true
    webView.bringSubview(toFront: activityIndicator!)
    
    if let myURL = URL(string: url ?? "") {
      let myRequest = URLRequest(url: myURL)
      webView.load(myRequest)
    }
    
    closeButton.title = "penny_test_close_text".localized()
    
    if let count = navigationController?.viewControllers.count,
      count > 1 {
      navigationItem.leftBarButtonItem = nil
    }
  }
  
  @IBAction func touchCloseButton(_ sender: UIBarButtonItem) {
    dismiss(animated: true, completion: nil)
  }
  
}


extension WkWebViewController: WKUIDelegate, WKNavigationDelegate {
  func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
    print("start")
    activityIndicator?.center = self.view.center
    activityIndicator?.startAnimating()
  }
  
  func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    activityIndicator?.stopAnimating()
    self.navigationItem.title = webView.title
  }
  
  func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping () -> Void) {
    let alertController = UIAlertController(title: message, message: nil,
                                            preferredStyle: UIAlertController.Style.alert);
    
    alertController.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.cancel) {
      _ in completionHandler()}
    );
    
    self.present(alertController, animated: true, completion: {});
  }
}

extension WkWebViewController: WKScriptMessageHandler  {
  func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
    print(message.name)
    if let body = message.body as? String {
      self.alertWithOk(
        message: body,
        title: "Alert",
        okAction: { self.dismiss(animated: true, completion: nil) })
    }
  }
}