//
//  HomeTabBarController.swift
//  Lookfit
//
//  Created by lemo. on 2020/3/7.
//  Copyright © 2020 Sheldon. All rights reserved.
//

import UIKit

enum HomeTabBarItem: Int {
    case health, sport, device, mine

    private func controller(with viewModel: ViewModel, navigator: Navigator) -> UIViewController {
        switch self {
        case .health:
//            let vc = HealthViewController(viewModel: viewModel, navigator: navigator)
            let vc = HealthHomeViewControllers(viewModel: viewModel, navigator: navigator)
            vc.isHiddenNavBar = true
            return NavigationController(rootViewController: vc)
        case .sport:
            let vc = SportViewControllers(viewModel: viewModel, navigator: navigator)
            return NavigationController(rootViewController: vc)
        case .device:
            let vc = DeviceViewControllers(viewModel: viewModel, navigator: navigator)
//            vc.tongzhi(); 加入的目的是什么？初始化就已经跑了？ 加入会导致重复执行通知
            return NavigationController(rootViewController: vc)
        case .mine:
            let vc = MineViewController(viewModel: viewModel, navigator: navigator)
            vc.isHiddenNavBar = true
            vc.isLightStatusBar = true
            return NavigationController(rootViewController: vc)
        }
    }

    var image: UIImage? {
        switch self {
        case .health: return R.image.icon_health_normal()
        case .sport: return R.image.icon_sport_normal()
        case .device: return R.image.icon_device_normal()
        case .mine: return R.image.icon_mine_normal()
        }
    }
    
    var selectedImage: UIImage? {
        switch self {
         case .health: return R.image.icon_health_selected()
         case .sport: return R.image.icon_sport_selected()
         case .device: return R.image.icon_device_selected()
         case .mine: return R.image.icon_mine_selected()
         }
    }

    var title: String {
        switch self {
        case .health: return MultiLanguageKey.health.localized
        case .sport: return MultiLanguageKey.sport.localized
        case .device: return MultiLanguageKey.device.localized
        case .mine: return MultiLanguageKey.mine.localized
        }
    }
    
    func getController(with viewModel: ViewModel, navigator: Navigator) -> UIViewController {
        let vc = controller(with: viewModel, navigator: navigator)
        let item = UITabBarItem(title: title, image: image?.withRenderingMode(.alwaysOriginal), selectedImage: selectedImage?.withRenderingMode(.alwaysOriginal)).then {
            $0.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: kHexColor(0x2A2A2A)], for: .normal)
            $0.setTitleTextAttributes([NSAttributedString.Key.foregroundColor: kHexColor(0x004EFF)], for: .selected)
        }
        vc.tabBarItem = item
        return vc
    }
}

class HomeTabBarController: UITabBarController, Navigatable {
    var viewModel: HomeTabBarViewModel?
    var navigator: Navigator!
    
    init(viewModel: ViewModel?, navigator: Navigator) {
        self.viewModel = viewModel as? HomeTabBarViewModel
        self.navigator = navigator
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        makeUI()
        bindViewModel()
    }
    
    func makeUI() {
        delegate = self
        tabBar.isTranslucent = false
        tabBar.barTintColor = ThemeManager.tabBarColor
        tabBar.backgroundImage = UIImage()
        tabBar.shadowImage = UIImage()
        tabBar.layer.shadowColor = UIColor.lightGray.cgColor
        tabBar.layer.shadowOffset = CGSize(width: 0, height: -5)
        tabBar.layer.shadowOpacity = 0.3
        if #available(iOS 13, *) {
            let lineView = UIView(frame: CGRect(x: 0, y: -1, width: tabBar.bounds.width, height: 1))
            lineView.backgroundColor = ThemeManager.tabBarColor
            tabBar.addSubview(lineView)
        }
        if #available(iOS 15, *) {
            let bar = UITabBarAppearance.init()
            bar.backgroundColor = ThemeManager.tabBarColor
            bar.shadowImage = UIImage()
            let selTitleAttr = [
//                NSAttributedString.Key.font: itemFont,
                NSAttributedString.Key.foregroundColor: kHexColor(0x004EFF)
            ]
            bar.stackedLayoutAppearance.selected.titleTextAttributes = selTitleAttr
            self.tabBar.scrollEdgeAppearance = bar
            self.tabBar.standardAppearance = bar
        }
    }
    
    func bindViewModel() {
        guard let viewModel = viewModel else { return }
        let controllers = viewModel.tabBarItems.map { $0.getController(with: viewModel.viewModel(for: $0), navigator: navigator) }
        setViewControllers(controllers, animated: false)
    }
}

extension HomeTabBarController: UITabBarControllerDelegate {
    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        return true
    }
    func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {
    }
}