JSON

import UIKit
import WebKit

class ViewController: UITableViewController {


    struct TopStoriesResponse: Decodable {
        let status: String
        let results: [Story]
    }

    struct Story: Decodable {
        let title: String
        let abstract: String
        let url: String
    }

    var headlines = [String]()
    var abstracts = [String]()
    var images = [String]()
    var urls = [URL]()
    var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()

        webView = WKWebView()
        getJson { (success) in
            print("Success")
        }
    }





    func getJson(completionHandler: @escaping (Bool) -> ()) {
        let jsonUrlString = "https://api.nytimes.com/svc/topstories/v1/business.json?api-key=f4bf2ee721031a344b84b0449cfdb589:1:73741808"
        guard let url = URL(string: jsonUrlString) else {return}

        URLSession.shared.dataTask(with: url) { (data, response, err) in
            guard let data = data, err == nil else {
                print(err!)
                return
            }

            do {
                let response = try
                    JSONDecoder().decode(TopStoriesResponse.self, from: data)
                print(response.results)

                // Pass results into arrays (title, abstract, url, image)
                completionHandler(true)

                DispatchQueue.main.async {
                    self.tableView.reloadData()
                }
            } catch let jsonErr {
                print("Error serializing JSON", jsonErr)
            }
        }.resume()
    }



// MARK: - Tableview methods

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return headlines.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "JSONcell", for: indexPath) as! JSONTableViewCell

//        cell.cellHeadlineLabel.text = self.headlines[indexPath.row]
//        cell.cellDetailLabel.text = self.abstracts[indexPath.row]
//        cell.cellImageView.cacheImage(urlString: self.images[indexPath.row])

        return cell
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        webView.load(URLRequest(url: self.urls[indexPath.row]))
        webView.allowsBackForwardNavigationGestures = true
        view = webView

        // Back button
//        self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.plain, target: self, action: #selector(self.goBack))
    }

    func goBack() {
        if webView.canGoBack {
            webView.goBack()
        }
    }


}