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import Foundation
import SwiftUI

// Implemented based on this article:
// https://noahgilmore.com/blog/swiftui-self-sizing-cells

// MARK: - HostingTableViewCell

public final class HostingTableViewCell<Content: View>: UITableViewCell {
    private var hostingController = UIHostingController<Content?>(rootView: nil)

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final class ExampleViewControllerTests: XCTestCase {
    private lazy var viewController: ExampleViewController = {
        let viewController = ExampleViewController(customView: self.mockCustomView,
                                                   presenter: self.mockPresenter)
    }()

    private let mockCustomView = MockExampleCustomView()
    private let mockPresenter = MockExamplePresenter()

    func testViewWillAppear() {

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final class MockExampleCustomView: CustomViewProtocol {
    var didCallRenderData: Bool = false
    var dataToBeRender: String?
    var didCallRenderLoading: Bool = false

    func render(data: String) {
        dataToBeRender = data
        didCallRenderData = true
    }

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typealias CustomViewDelegate = UITableViewDelegate & UITableViewDataSource

protocol CustomViewProtocol where Self: UIView {
    func render(data: String)
    func renderLoadingState()
}

final class ExampleViewController: UIViewController {
    private let customView: CustomViewProtocol
    private let presenter: ExamplePresenter

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protocol ExamplePresenter {
    func fetchData()
}

// Delegate that notifies the ViewController, so ViewController will conform to this protocol
protocol PresenterDelegate: AnyObject {
    func didFetch(data: String)
}

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protocol ButtonDelegate: AnyObject {
    func buttonDidTouched(data: String)
}

extension ExampleViewController: ButtonDelegate {
    func buttonDidTouched(data: String) {
        let nextScene = NextViewController(data: data)
        self.navigationController?.pushViewController(nextScene, animated: true)
    }
}

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protocol NextCustomViewProtocol where Self: UIView {}

final class DefaultNextCustomView: UIView, NextCustomViewProtocol {
    override init(frame: CGRect = .zero) {
        super.init(frame: frame)
        // setup here
    }

    required init?(coder: NSCoder) {
        fatalError()

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extension UIColor {
    static let mainColor: UIColor = UIColor(red: 0.3, green: 0.6, blue: 0.6, alpha: 1)
    static let backgroundColor: UIColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
}

extension UIFont {
    static let mainFont: UIFont = UIFont(name: "helvetica", size: 14)!
    static let titleFont: UIFont = UIFont(name: "helvetica", size: 22)!
}

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private func configureHorizontalStack() {
    redView.addSubview(horizontalStack)
    // Cartography method to declared constraints
    let constraints = [
        horizontalStack.leadingAnchor.constraint(equalTo: redView.leadingAnchor, constant: 30),
        horizontalStack.trailingAnchor.constraint(equalTo: redView.trailingAnchor, constant: -30),
        horizontalStack.topAnchor.constraint(equalTo: redView.topAnchor, constant: 25),
        horizontalStack.bottomAnchor.constraint(equalTo: redView.bottomAnchor, constant: -25)
    ]
    NSLayoutConstraint.activate(constraints)

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private func configureHorizontalStack() {
    redView.addSubview(horizontalStack)
    // Cartography method to declared constraints
    constrain(horizontalStack, redView) { view, superview in
        view.leading == superview.leading + 30
        view.trailing == superview.trailing - 30
        view.top == superview.top + 25
        view.bottom == superview.bottom - 25
    }
}