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import UIKit

protocol Reusable {
  static var reuseIdentifier: String { get }
}

extension Reusable {
  static var reuseIdentifier: String {
    return String(describing: Self.self)
  }
}

protocol InterfaceBuilderPrototypable {
  static var nib: UINib { get }
}

extension InterfaceBuilderPrototypable {
  static var nib: UINib {
    return UINib(nibName: String(describing: Self.self), bundle: nil)
  }
}

extension UICollectionView {

  func register<T: UICollectionViewCell>(_ : T.Type) where T: Reusable, T: InterfaceBuilderPrototypable {
    register(T.nib, forCellWithReuseIdentifier: T.reuseIdentifier)
  }

  func register<T: UICollectionViewCell>(_ : T.Type) where T: Reusable {
    register(T.self, forCellWithReuseIdentifier: T.reuseIdentifier)
  }

  func dequeue<T: UICollectionViewCell>(_: T.Type, for indexPath: IndexPath) -> T where T: Reusable {
    guard let cell = dequeueReusableCell(withReuseIdentifier: T.reuseIdentifier, for: indexPath) as? T else {
      abort()
    }

    return cell
  }
}

extension UITableView {

  func register<T: UITableViewCell>(_ : T.Type) where T: Reusable {
    register(T.self, forCellReuseIdentifier: T.reuseIdentifier)
  }

  func register<T: UITableViewCell>(_ : T.Type) where T: Reusable, T: InterfaceBuilderPrototypable {
    register(T.nib, forCellReuseIdentifier: T.reuseIdentifier)
  }

  func dequeue<T: UITableViewCell>(_ : T.Type, for indexPath: IndexPath) -> T where T: Reusable {
    guard let cell = dequeueReusableCell(withIdentifier: T.reuseIdentifier, for: indexPath) as? T else {
      abort()
    }
    return cell
  }
}