/*****************************************************************************
 * VLCTabbarCooordinator.swift
 * VLC for iOS
 *****************************************************************************
 * Copyright (c) 2018 VideoLAN. All rights reserved.
 * $Id$
 *
 * Authors: Carola Nitz <nitz.carola # gmail.com>
 *
 * Refer to the COPYING file of the official project for license.
 *****************************************************************************/

import Foundation

class VLCTabbarCooordinator: NSObject, VLCMediaViewControllerDelegate, UITabBarControllerDelegate {

    private var childCoordinators: [NSObject] = []
    private var tabBarController: UITabBarController
    private var services: Services
    private let displayController = VLCPlayerDisplayController()

    public init(tabBarController: UITabBarController, services: Services) {
        self.tabBarController = tabBarController
        self.services = services
        super.init()
        self.tabBarController.delegate = self
        NotificationCenter.default.addObserver(self, selector: #selector(updateTheme), name: .VLCThemeDidChangeNotification, object: nil)
    }

    @objc public func start() {
        setupViewControllers()
        updateTheme()
    }

    @objc func updateTheme() {
        tabBarController.tabBar.barTintColor = PresentationTheme.current.colors.tabBarColor
        customizeMoreViewController()
    }

    func customizeMoreViewController() {
        if let UITabBarCustomizeViewClass = NSClassFromString("UITabBarCustomizeView") {
            for subview in tabBarController.view.subviews where subview.isKind(of: UITabBarCustomizeViewClass) {
                subview.backgroundColor = PresentationTheme.current.colors.background
                subview.tintColor = PresentationTheme.current.colors.orangeUI
            }
        }
    }

    func tabBarController(_ tabBarController: UITabBarController, willBeginCustomizing viewControllers: [UIViewController]) {
       customizeMoreViewController()
    }

    func setupViewControllers() {

        tabBarController.addChildViewController(displayController)
        tabBarController.view.addSubview(displayController.view)
        displayController.view.layoutMargins = UIEdgeInsets(top:0, left:0, bottom:tabBarController.tabBar.frame.size.height, right:0)
        displayController.didMove(toParentViewController: tabBarController)

        let videoVC = VLCMediaViewController(services: services)
        //this should probably not be the delegate
        videoVC.delegate = self
        videoVC.title = NSLocalizedString("Video", comment: "")
        videoVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("Video", comment: ""),
            image: UIImage(named: "TVShowsIcon"),
            selectedImage: UIImage(named: "TVShowsIcon"))

        // Audio
        let audioVC = VLCMediaViewController(services: services)
        //this should probably not be the delegate
        audioVC.delegate = self
        audioVC.title = NSLocalizedString("Audio", comment: "")
        audioVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("Audio", comment: ""),
            image: UIImage(named: "MusicAlbums"),
            selectedImage:UIImage(named: "MusicAlbums"))

        //Serverlist
        let serverVC = VLCServerListViewController(nibName: nil, bundle: nil)
        serverVC.title = NSLocalizedString("LOCAL_NETWORK", comment: "")
        serverVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("LOCAL_NETWORK", comment: ""),
            image: UIImage(named: "Local"),
            selectedImage: UIImage(named: "Local"))

        //CloudServices
        let cloudVC = VLCCloudServicesTableViewController(nibName: "VLCCloudServicesTableViewController", bundle: Bundle.main)
        cloudVC.title = NSLocalizedString("CLOUD_SERVICES", comment: "")
        cloudVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("CLOUD_SERVICES", comment: ""),
            image: UIImage(named: "iCloudIcon"),
            selectedImage: UIImage(named: "iCloudIcon"))

        //Settings
        let settingsVC = VLCSettingsController()
        settingsVC.title = NSLocalizedString("Settings", comment: "")
        settingsVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("Settings", comment: ""),
            image: UIImage(named: "Settings"),
            selectedImage: UIImage(named: "Settings"))

        //Download
        let downloadVC = VLCDownloadViewController()
        downloadVC.title = NSLocalizedString("DOWNLOAD_FROM_HTTP", comment:"")
        downloadVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("DOWNLOAD_FROM_HTTP", comment: ""),
            image: UIImage(named: "Downloads"),
            selectedImage:  UIImage(named: "Downloads"))

        //Streaming
        let streamVC = VLCOpenNetworkStreamViewController(nibName: "VLCOpenNetworkStreamViewController", bundle: Bundle.main)
        streamVC.title = NSLocalizedString("OPEN_NETWORK", comment: "")
        streamVC.tabBarItem = UITabBarItem(
            title:  NSLocalizedString("OPEN_NETWORK", comment: ""),
            image: UIImage(named: "OpenNetStream"),
            selectedImage: UIImage(named: "OpenNetStream"))

        //About
        let aboutVC = VLCAboutViewController()
        aboutVC.title = NSLocalizedString("ABOUT_APP", comment: "")

        aboutVC.tabBarItem = UITabBarItem(
            title: NSLocalizedString("ABOUT_APP", comment: ""),
            image: coneIcon(),
            selectedImage: coneIcon())

        let controllers = [audioVC, serverVC, videoVC, settingsVC, cloudVC, downloadVC, streamVC, aboutVC]
        tabBarController.viewControllers = controllers.map { UINavigationController(rootViewController: $0)}
    }

    func coneIcon() -> UIImage? {
        let calendar = NSCalendar(calendarIdentifier: .gregorian)
        if let dayOfYear = calendar?.ordinality(of: .day, in: .year, for: Date()) {
            return dayOfYear >= 354 ? UIImage(named: "vlc-xmas") : UIImage(named: "menuCone")
        }
        return nil
    }

    // MARK: - VLCMediaViewControllerDelegate
    func mediaViewControllerDidSelectMediaObject(_ VLCMediaViewController: VLCMediaViewController, mediaObject: NSManagedObject) {
        playMedia(media:mediaObject)
    }

    func mediaViewControllerDidSelectSort(_ VLCMediaViewController: VLCMediaViewController) {
        showSortOptions()
    }

    func playMedia(media: NSManagedObject) {
        //that should go into a Coordinator itself
        let vpc = VLCPlaybackController.sharedInstance()
        vpc?.playMediaLibraryObject(media)
    }

    func showSortOptions() {
        //This should be in a subclass
        let sortOptionsAlertController = UIAlertController(title: NSLocalizedString("Sort by", comment: ""), message: nil, preferredStyle: .actionSheet)
        let sortByNameAction = UIAlertAction(title: SortOption.alphabetically.localizedDescription, style: .default) { action in
        }
        let sortBySizeAction = UIAlertAction(title: SortOption.size.localizedDescription, style: .default) { action in
        }
        let sortbyDateAction = UIAlertAction(title: SortOption.insertonDate.localizedDescription, style: .default) { action in
        }
        let cancelAction = UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .cancel, handler: nil)
        sortOptionsAlertController.addAction(sortByNameAction)
        sortOptionsAlertController.addAction(sortbyDateAction)
        sortOptionsAlertController.addAction(sortBySizeAction)
        sortOptionsAlertController.addAction(cancelAction)
        sortOptionsAlertController.view.tintColor = UIColor.vlcOrangeTint()
        tabBarController.present(sortOptionsAlertController, animated: true)
    }
}