import RxSwift
import RxCocoa
import Action

final class ViewController: UIViewController {

    // UI Elements
    fileprivate var aButton = ViewController._aButton()
    fileprivate var anotherButton = ViewController._aButton()
    fileprivate let logo = ViewController._logo()

    // Data Bindings
    private let disposeBag = DisposeBag()
    var viewModel: ControllerViewModelType!

    func bindViewModel() {

        aButton.rx.tap
            .bind(to: viewModel.actions.pushFirstScreen.inputs)
            .disposed(by: disposeBag)

        anotherButton.rx.action = viewModel.actions.pushSecondScreen
    }

    // Controller Life Cycle
    override func viewDidLoad() {
        super.viewDidLoad()

        bindViewModel()
        setupViews()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        UIApplication.shared.isStatusBarHidden = true
        navigationController?.navigationBar?.isHidden = true
    }
}

// MARK: Helpers


// MARK: UI Elements
extension ViewController {

    fileprivate func setupViews() {

        view.backgroundColor = .blue

        // MARK: Logo setup
        view.addSubview(logo)
        logo.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
        logo.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: -view.bounds.size.height / 15).isActive = true
        logo.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 1/1.7).isActive = true
        logo.heightAnchor.constraint(equalTo: logo.widthAnchor).isActive = true

        // MARK: aButton setup
        aButton.setTitle("Hello", for: .normal)
        view.addSubview(aButton)
        aButton.leftAnchor.constraint(equalTo: view.leftAnchor, constant: view.bounds.size.height / 20).isActive = true
        aButton.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -view.bounds.size.height / 16).isActive = true
        aButton.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 1/5).isActive = true
        aButton.widthAnchor.constraint(equalTo: aButton.heightAnchor, multiplier: 1/2).isActive = true

        // MARK: anotherButton setup
        anotherButton.setTitle("Hi", for: .normal)
        view.addSubview(anotherButton)
        anotherButton.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -view.bounds.size.height / 20).isActive = true
        anotherButton.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -view.bounds.size.height / 16).isActive = true
        anotherButton.heightAnchor.constraint(equalTo: aButton.heightAnchor).isActive = true
        anotherButton.widthAnchor.constraint(equalTo: anotherButton.heightAnchor, multiplier: 1/2).isActive = true
    }

    class func _logo() -> UIImageView {

        let iv = UIImageView()

        iv.contentMode = .scaleAspectFit
        iv.image = UIImage(named: "logo.png")
        iv.translatesAutoresizingMaskIntoConstraints = false
        return iv
    }

    class func _aButton() -> UIButton {

        let button = UIButton(type: .custom)

        button.imageView?.contentMode = .scaleAspectFit
        button.translatesAutoresizingMaskIntoConstraints = false
        return button
    }
}