import UIKit

protocol ChangedTitleDelegate {
    func titleChanged(title: String)
}

class DetailViewController: UIViewController {

    var delegate : ChangedTitleDelegate?

    var itemTitle = ""
    var itemDescription = ""
    let attributes : [NSAttributedString.Key: Any] = [
        .font: UIFont.systemFont(ofSize: 23),
        .foregroundColor: UIColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.5),
    ]
    var attributedTitle: NSAttributedString {
        return NSAttributedString(string: itemDescription.convertHtml().string, attributes: attributes)
    }

    @IBOutlet weak var tableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        delegate?.titleChanged(title: itemTitle)
        setupNavBar()
        tableView.rowHeight = UITableView.automaticDimension
    }

    func setupNavBar() {
        title = itemTitle
        navigationItem.largeTitleDisplayMode = .always
    }

}

// MARK: - Extensions
extension DetailViewController: UITableViewDelegate, UITableViewDataSource {
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)

        cell.textLabel?.attributedText = attributedTitle
        cell.textLabel?.numberOfLines = 0

        return cell
    }
}

extension String {
    func convertHtml() -> NSAttributedString {
        guard let data = data(using: .utf8) else { return NSAttributedString() }
        do {
            return try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)
        } catch { return NSAttributedString() }
    }
}