import UIKit
import SwiftUI
import ComposeApp

final class RootComposeViewController: UIViewController {
    private let contentController: UIViewController

    init(contentController: UIViewController) {
        self.contentController = contentController
        super.init(nibName: nil, bundle: nil)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = .black
        contentController.view.backgroundColor = .black

        addChild(contentController)
        view.addSubview(contentController.view)
        contentController.view.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            contentController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            contentController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            contentController.view.topAnchor.constraint(equalTo: view.topAnchor),
            contentController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor),
        ])
        contentController.didMove(toParent: self)
    }

    override var childForHomeIndicatorAutoHidden: UIViewController? {
        immersiveController(in: contentController) ?? contentController
    }

    override var childForScreenEdgesDeferringSystemGestures: UIViewController? {
        immersiveController(in: contentController) ?? contentController
    }

    override var childForStatusBarHidden: UIViewController? {
        immersiveController(in: contentController) ?? contentController
    }

    override var prefersHomeIndicatorAutoHidden: Bool {
        immersiveController(in: contentController)?.prefersHomeIndicatorAutoHidden ?? false
    }

    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge {
        immersiveController(in: contentController)?.preferredScreenEdgesDeferringSystemGestures ?? []
    }

    override var prefersStatusBarHidden: Bool {
        immersiveController(in: contentController)?.prefersStatusBarHidden ?? false
    }

    override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation {
        .fade
    }

    func refreshImmersiveSystemUI() {
        setNeedsUpdateOfHomeIndicatorAutoHidden()
        setNeedsUpdateOfScreenEdgesDeferringSystemGestures()
        setNeedsStatusBarAppearanceUpdate()
    }

    private func immersiveController(in controller: UIViewController?) -> UIViewController? {
        guard let controller else { return nil }

        if controller.prefersHomeIndicatorAutoHidden ||
            !controller.preferredScreenEdgesDeferringSystemGestures.isEmpty ||
            controller.prefersStatusBarHidden {
            return controller
        }

        if let presented = immersiveController(in: controller.presentedViewController) {
            return presented
        }

        for child in controller.children.reversed() {
            if let immersiveChild = immersiveController(in: child) {
                return immersiveChild
            }
        }

        return nil
    }
}

struct ComposeView: UIViewControllerRepresentable {
    func makeUIViewController(context: Context) -> UIViewController {
        // Register MPV player bridge before Compose initializes
        NuvioPlayerRegistration.register()
        
        let controller = MainViewControllerKt.MainViewController()
        controller.view.backgroundColor = UIColor(red: 0.008, green: 0.016, blue: 0.016, alpha: 1.0)
        return RootComposeViewController(contentController: controller)
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
}

struct ContentView: View {
    var body: some View {
        ComposeView()
            .ignoresSafeArea()
    }
}