//
//  PickServerCategoriesCell.swift
//  Mastodon
//
//  Created by BradGao on 2021/2/23.
//

//import os.log
//import UIKit
//import MastodonSDK
//
//protocol PickServerCategoriesCellDelegate: AnyObject {
//    func pickServerCategoriesCell(_ cell: PickServerCategoriesCell, collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
//}
//
//final class PickServerCategoriesCell: UITableViewCell {
//    
//    weak var delegate: PickServerCategoriesCellDelegate?
//    
//    var diffableDataSource: UICollectionViewDiffableDataSource<CategoryPickerSection, CategoryPickerItem>?
//        
//    let metricView = UIView()
//    
//    let collectionView: UICollectionView = {
//        let flowLayout = UICollectionViewFlowLayout()
//        flowLayout.scrollDirection = .horizontal
//        let view = ControlContainableCollectionView(frame: .zero, collectionViewLayout: flowLayout)
//        view.register(PickServerCategoryCollectionViewCell.self, forCellWithReuseIdentifier: String(describing: PickServerCategoryCollectionViewCell.self))
//        view.backgroundColor = .clear
//        view.showsHorizontalScrollIndicator = false
//        view.showsVerticalScrollIndicator = false
//        view.layer.masksToBounds = false
//        view.translatesAutoresizingMaskIntoConstraints = false
//        return view
//    }()
//    
//    override func prepareForReuse() {
//        super.prepareForReuse()
//        
//        delegate = nil
//    }
//    
//    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
//        super.init(style: style, reuseIdentifier: reuseIdentifier)
//        _init()
//    }
//    
//    required init?(coder: NSCoder) {
//        super.init(coder: coder)
//        _init()
//    }
//}
//
//extension PickServerCategoriesCell {
//    
//    private func _init() {
//        selectionStyle = .none
//        backgroundColor = Asset.Theme.Mastodon.systemGroupedBackground.color
//        configureMargin()
//        
//        metricView.translatesAutoresizingMaskIntoConstraints = false
//        contentView.addSubview(metricView)
//        NSLayoutConstraint.activate([
//            metricView.leadingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leadingAnchor),
//            metricView.trailingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.trailingAnchor),
//            metricView.topAnchor.constraint(equalTo: contentView.topAnchor),
//            metricView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
//            metricView.heightAnchor.constraint(equalToConstant: 80).priority(.defaultHigh),
//        ])
//        
//        contentView.addSubview(collectionView)
//        NSLayoutConstraint.activate([
//            collectionView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
//            collectionView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),
//            collectionView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 10),
//            contentView.bottomAnchor.constraint(equalTo: collectionView.bottomAnchor, constant: 20),
//            collectionView.heightAnchor.constraint(equalToConstant: 80).priority(.defaultHigh),
//        ])
//        
//        collectionView.delegate = self
//    }
//    
//    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
//        super.traitCollectionDidChange(previousTraitCollection)
//        
//        configureMargin()
//    }
//    
//    override func layoutSubviews() {
//        super.layoutSubviews()
//        
//        collectionView.collectionViewLayout.invalidateLayout()
//    }
//
//}
//
//extension PickServerCategoriesCell {
//    private func configureMargin() {
//        switch traitCollection.horizontalSizeClass {
//        case .regular:
//            let margin = MastodonPickServerViewController.viewEdgeMargin
//            contentView.layoutMargins = UIEdgeInsets(top: 0, left: margin, bottom: 0, right: margin)
//        default:
//            contentView.layoutMargins = .zero
//        }
//    }
//}
//
//// MARK: - UICollectionViewDelegateFlowLayout
//extension PickServerCategoriesCell: UICollectionViewDelegateFlowLayout {
//    
//    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
//        os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: indexPath: %s", ((#file as NSString).lastPathComponent), #line, #function, indexPath.debugDescription)
//        collectionView.selectItem(at: indexPath, animated: true, scrollPosition: .centeredHorizontally)
//        delegate?.pickServerCategoriesCell(self, collectionView: collectionView, didSelectItemAt: indexPath)
//    }
//
//    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
//        layoutIfNeeded()
//        return UIEdgeInsets(top: 0, left: metricView.frame.minX - collectionView.frame.minX, bottom: 0, right: collectionView.frame.maxX - metricView.frame.maxX)
//    }
//
//    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
//        return 16
//    }
//
//    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
//        return CGSize(width: 60, height: 80)
//    }
//    
//}
//
//extension PickServerCategoriesCell {
//
//    override func accessibilityElementCount() -> Int {
//        guard let diffableDataSource = diffableDataSource else { return 0 }
//        return diffableDataSource.snapshot().itemIdentifiers.count
//    }
//    
//    override func accessibilityElement(at index: Int) -> Any? {
//        guard let item = collectionView.cellForItem(at: IndexPath(item: index, section: 0)) else { return nil }
//        return item
//    }
//    
//}