import HUD
import DrawerFeature
import Theme
import UIKit
import Shared
import Combine
import DependencyInjection
import ScrollViewController
import Models

public final class OnboardingPhoneConfirmationController: UIViewController {
    @Dependency private var hud: HUD
    @Dependency private var coordinator: OnboardingCoordinating
    @Dependency private var statusBarController: StatusBarStyleControlling

    lazy private var screenView = OnboardingPhoneConfirmationView()
    lazy private var scrollViewController = ScrollViewController()

    private var cancellables = Set<AnyCancellable>()
    private let completion: (UIViewController) -> Void
    private var drawerCancellables = Set<AnyCancellable>()
    private let viewModel: OnboardingPhoneConfirmationViewModel

    public init(
        _ confirmation: AttributeConfirmation,
        _ completion: @escaping (UIViewController) -> Void
    ) {
        self.completion = completion
        self.viewModel = OnboardingPhoneConfirmationViewModel(confirmation)
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder: NSCoder) { nil }

    public override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        statusBarController.style.send(.darkContent)
        navigationController?.navigationBar.customize(translucent: true)
    }

    public override func viewDidLoad() {
        super.viewDidLoad()
        navigationItem.backButtonTitle = " "

        setupNavigationBar()
        setupScrollView()
        setupBindings()

        screenView.setupSubtitle(
            Localized.Onboarding.PhoneConfirmation.subtitle(viewModel.confirmation.content)
        )

        screenView.didTapInfo = { [weak self] in
            self?.presentInfo(
                title: Localized.Onboarding.PhoneConfirmation.Info.title,
                subtitle: Localized.Onboarding.PhoneConfirmation.Info.subtitle
            )
        }
    }

    private func setupNavigationBar() {
        let back = UIButton.back()
        back.addTarget(self, action: #selector(didTapBack), for: .touchUpInside)
        navigationItem.leftBarButtonItem = UIBarButtonItem(customView: back)
    }

    private func setupScrollView() {
        addChild(scrollViewController)
        view.addSubview(scrollViewController.view)
        scrollViewController.view.snp.makeConstraints { $0.edges.equalToSuperview() }
        scrollViewController.didMove(toParent: self)
        scrollViewController.contentView = screenView
        scrollViewController.scrollView.backgroundColor = Asset.neutralWhite.color
    }

    private func setupBindings() {
        viewModel.hud.receive(on: DispatchQueue.main)
            .sink { [hud] in hud.update(with: $0) }
            .store(in: &cancellables)

        screenView.inputField.textPublisher
            .sink { [unowned self] in viewModel.didInput($0) }
            .store(in: &cancellables)

        viewModel.state
            .map(\.status)
            .removeDuplicates()
            .receive(on: DispatchQueue.main)
            .sink { [unowned self] in screenView.update(status: $0) }
            .store(in: &cancellables)

        screenView.nextButton
            .publisher(for: .touchUpInside)
            .receive(on: DispatchQueue.main)
            .sink { [unowned self] in viewModel.didTapNext() }
            .store(in: &cancellables)

        viewModel.completionPublisher
            .receive(on: DispatchQueue.main)
            .sink { [unowned self] _ in completion(self) }
            .store(in: &cancellables)

        screenView.resendButton
            .publisher(for: .touchUpInside)
            .receive(on: DispatchQueue.main)
            .sink { [unowned self] in viewModel.didTapResend() }
            .store(in: &cancellables)

        viewModel.state
            .map(\.resendDebouncer)
            .receive(on: DispatchQueue.main)
            .sink { [unowned self] in
                screenView.resendButton.isEnabled = $0 == 0

                if $0 == 0 {
                    screenView.resendButton.setTitle(Localized.Profile.Code.resend(""), for: .normal)
                } else {
                    screenView.resendButton.setTitle(Localized.Profile.Code.resend("(\($0))"), for: .disabled)
                }
            }.store(in: &cancellables)
    }

    private func presentInfo(title: String, subtitle: String) {
        let actionButton = CapsuleButton()
        actionButton.set(style: .seeThrough, title: Localized.Settings.InfoDrawer.action)

        let drawer = DrawerController(with: [
            DrawerText(
                font: Fonts.Mulish.bold.font(size: 26.0),
                text: title,
                color: Asset.neutralActive.color,
                alignment: .left,
                spacingAfter: 19
            ),
            DrawerText(
                font: Fonts.Mulish.regular.font(size: 16.0),
                text: subtitle,
                color: Asset.neutralBody.color,
                alignment: .left,
                lineHeightMultiple: 1.1,
                spacingAfter: 37
            ),
            DrawerStack(views: [
                actionButton,
                FlexibleSpace()
            ])
        ])

        actionButton.publisher(for: .touchUpInside)
            .receive(on: DispatchQueue.main)
            .sink {
                drawer.dismiss(animated: true) { [weak self] in
                    guard let self = self else { return }
                    self.drawerCancellables.removeAll()
                }
            }.store(in: &drawerCancellables)

        coordinator.toDrawer(drawer, from: self)
    }

    @objc private func didTapBack() {
        navigationController?.popViewController(animated: true)
    }
}