import UIKit
import SnapKit

class SubscribeScreenView: UIViewController {

    private let btnCancel = UIButton()

    private let titleLabel = UILabel()

    private var myCollectionView : UICollectionView!

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = .back
        setupUI()
    }

    @objc func cancelView() {

        dismiss(animated: true)

    }

}


extension SubscribeScreenView {

    private func setupFlowLayout() -> UICollectionViewFlowLayout {

        let layout = UICollectionViewFlowLayout()

        layout.itemSize = .init(width: 300, height: 100)
        layout.scrollDirection = .vertical

        return layout

    }

    private func setupUI() {

        myCollectionView = UICollectionView(frame: .zero, collectionViewLayout: setupFlowLayout())

        [myCollectionView].forEach { view.addSubview($0) }
        [titleLabel, btnCancel].forEach { myCollectionView.addSubview($0) }

        myCollectionView.snp.makeConstraints { make in
            make.top.equalToSuperview()
            make.leading.equalToSuperview()
            make.trailing.equalToSuperview()
            make.bottom.equalToSuperview()

        }

        titleLabel.snp.makeConstraints { make in
            make.top.equalToSuperview().inset(100)
            make.leading.equalToSuperview().inset(20)
        }

        btnCancel.snp.makeConstraints { make in
            make.top.equalToSuperview().inset(-100)
            make.trailing.equalToSuperview().inset(20)
            make.height.equalTo(titleLabel.snp.height)
            make.width.equalTo(60)
        }

        // setup

        myCollectionView.dataSource = self
        myCollectionView.delegate = self
        myCollectionView.backgroundColor = .back
        myCollectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "testID")

        titleLabel.text = "Подписки TLG"
        titleLabel.font = UIFont(name: "Lato-Black", size: 30)
        titleLabel.textAlignment = .left
        titleLabel.textColor = .accent
        titleLabel.adjustsFontSizeToFitWidth = true
        titleLabel.minimumScaleFactor = 0.1
        titleLabel.numberOfLines = 2

        btnCancel.setImage(UIImage(systemName: "xmark"), for: .normal)
        btnCancel.imageView?.tintColor = .white
        btnCancel.addTarget(self, action: #selector(cancelView), for: .touchUpInside)



    }

}

extension SubscribeScreenView : UICollectionViewDataSource, UICollectionViewDelegate {

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        20
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "testID", for: indexPath) as? UICollectionViewCell else { fatalError() }

        cell.backgroundColor = UIColor.accent

        return cell

    }




}