//  Custom cell

import UIKit

protocol CellDelegate: class {
    func youtuberTableViewCell(_ youtuberTableViewCell: PictureCell, subscribeButtonTappedFor youtuber: String)
}

class PictureCell: UITableViewCell {
    @IBOutlet weak var youtuberLabel: UILabel!
    @IBOutlet weak var subscribeButton: UIButton!

    var youtuber : String?

    weak var delegate : CellDelegate?

    override func awakeFromNib() {
        super.awakeFromNib()
        self.subscribeButton.frame = CGRect(origin: CGPoint(x: 200,y :60), size: CGSize(width: 100, height: 24))
        let cellHeight: CGFloat = 44.0
        self.subscribeButton.center = CGPoint(x: bounds.width / (4/3), y: cellHeight / 2.0)
        self.subscribeButton.addTarget(self, action: #selector(subscribeButtonTapped(_:)), for: .touchUpInside)
    }

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

        // Configure the view for the selected state
    }

    @IBAction func subscribeButtonTapped(_ sender: UIButton){
        if let youtuber = youtuber,
           let _ = delegate {
            self.delegate?.youtuberTableViewCell(self, subscribeButtonTappedFor: youtuber)
        }
      }
}

// ViewController

import UIKit

class ViewController: UIViewController {
    let titleName: String = "Intro project"
    var tableView: UITableView = UITableView()

    let youtubers = ["Brian Voong", "Seth Everman", "Dave Lee", "Cybershell", "Bill Wurtz"]

    struct Cells {
        static let photoCell: String = "PictureCell"
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        title = titleName
        configureTableView()
    }

    func configureTableView() {
        view.addSubview(tableView)
        setTableViewDelegates()
        tableView.rowHeight = 100
        tableView.register(PictureCell.self, forCellReuseIdentifier: Cells.photoCell)
        tableView.pin(to: view)
    }

    func setTableViewDelegates() {
        tableView.delegate = self
        tableView.dataSource = self
    }
}

extension ViewController: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: Cells.photoCell) as! PictureCell

        // =========================================================//

        cell.youtuberLabel?.text = youtubers[indexPath.row]
        cell.youtuber = youtubers[indexPath.row]
        cell.delegate = self

        // =========================================================//

        //cell.set(picture: picture)
        return cell
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 5
    }
}

extension ViewController: CellDelegate {
    func youtuberTableViewCell(_ youtuberTableViewCell: PictureCell, subscribeButtonTappedFor youtuber: String) {
        let alert = UIAlertController(title: "Subscribed!", message: "Subscribed to \(youtuber)", preferredStyle: .alert)
        let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alert.addAction(okAction)

        self.present(alert, animated: true, completion: nil)
    }
}