class MenuBar: UIView, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    lazy var collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = .lightGray
        cv.dataSource = self
        cv.delegate = self
        return cv
    }()

    let cellId = "cellId"
    let imageNames = ["Plan", "folder", "list", "people", "plancorrection"]

    override init(frame: CGRect) {
        super.init(frame: frame)

        collectionView.register(MenuCell.self, forCellWithReuseIdentifier: cellId)

        addSubview(collectionView)
        addConstraintsWithFormat("H:|[v0]|", views: collectionView)
        addConstraintsWithFormat("V:|[v0(200)]|", views: collectionView)

        let selectedIndexPath = IndexPath(item: 0, section: 0)
        collectionView.selectItem(at: selectedIndexPath, animated: false, scrollPosition: .bottom)
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 5
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! MenuCell

        cell.imageView.image = UIImage(named: imageNames[indexPath.item])?.withRenderingMode(.alwaysTemplate)
        cell.tintColor = .white

        return cell
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: frame.width / 5, height: frame.height)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 0
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}


class MenuCell: CustomMenuBarBaseCell {

    let imageView: UIImageView = {
        let iv = UIImageView()
        iv.image = UIImage(named: "Plan")?.withRenderingMode(.alwaysTemplate)
        iv.tintColor = .gray
        return iv
    }()

    override var isHighlighted: Bool {
        didSet {
            imageView.tintColor = isHighlighted ? UIColor.white : UIColor.rgb(red: 91, green: 14, blue: 13)
        }
    }

//    override var isSelected: Bool {
//        didSet {
//            imageView.tintColor = isSelected ? UIColor.white : UIColor.rgb(red: 91, green: 14, blue: 13)
//        }
//    }

    override func setupViews() {
        super.setupViews()

        addSubview(imageView)

        addConstraintsWithFormat("H:[v0(28)]", views: imageView)
        addConstraintsWithFormat("V:[v0(28)]", views: imageView)

        addConstraint(NSLayoutConstraint(item: imageView, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1, constant: 0))
        addConstraint(NSLayoutConstraint(item: imageView, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1, constant: 0))
    }

}