//
//  NewTabBarController.swift
//  YuMi
//
//  Created by AI on 2025-10-09.
//  Copyright © 2025 YuMi. All rights reserved.
//

import UIKit

/// 新的 TabBar 控制器
/// 只包含 Moment 和 Mine 两个 Tab
class NewTabBarController: UITabBarController {
    
    // MARK: - Properties
    
    /// 全局事件管理器
    private var globalEventManager: GlobalEventManager?
    
    /// 是否已登录
    private var isLoggedIn: Bool = false
    
    // MARK: - Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 测试域名配置
        #if DEBUG
        APIConfig.testEncryption()
        #endif
        
        setupTabBarAppearance()
        setupGlobalManagers()
        setupInitialViewControllers()
        
        NSLog("[NewTabBarController] 初始化完成")
    }
    
    deinit {
        globalEventManager?.removeAllDelegates()
        NSLog("[NewTabBarController] 已释放")
    }
    
    // MARK: - Setup
    
    /// 设置 TabBar 外观
    private func setupTabBarAppearance() {
        // 自定义 TabBar 样式
        tabBar.tintColor = UIColor(red: 0.2, green: 0.6, blue: 0.86, alpha: 1.0) // 新主色调
        tabBar.unselectedItemTintColor = UIColor(white: 0.6, alpha: 1.0) // 新辅助色
        tabBar.backgroundColor = .white
        tabBar.isTranslucent = false
        
        // 添加顶部分割线
        if #available(iOS 13.0, *) {
            let appearance = UITabBarAppearance()
            appearance.configureWithOpaqueBackground()
            appearance.backgroundColor = .white
            appearance.stackedLayoutAppearance.selected.iconColor = tabBar.tintColor
            appearance.stackedLayoutAppearance.selected.titleTextAttributes = [
                .foregroundColor: tabBar.tintColor ?? .blue,
                .font: UIFont.systemFont(ofSize: 10, weight: .medium)
            ]
            appearance.stackedLayoutAppearance.normal.titleTextAttributes = [
                .foregroundColor: tabBar.unselectedItemTintColor ?? .gray,
                .font: UIFont.systemFont(ofSize: 10)
            ]
            
            tabBar.standardAppearance = appearance
            if #available(iOS 15.0, *) {
                tabBar.scrollEdgeAppearance = appearance
            }
        }
        
        NSLog("[NewTabBarController] TabBar 外观设置完成")
    }
    
    /// 设置全局管理器
    private func setupGlobalManagers() {
        globalEventManager = GlobalEventManager.shared()
        globalEventManager?.setupSDKDelegates()
        
        // 设置房间最小化视图
        if let containerView = view {
            globalEventManager?.setupRoomMiniView(on: containerView)
        }
        
        // 注册社交分享回调
        globalEventManager?.registerSocialShareCallback()
        
        NSLog("[NewTabBarController] 全局管理器设置完成")
    }
    
    /// 设置初始 ViewController（未登录状态）
    private func setupInitialViewControllers() {
        // TODO: 暂时使用空白页面占位
        let blankVC1 = UIViewController()
        blankVC1.view.backgroundColor = .white
        blankVC1.tabBarItem = createTabBarItem(
            title: "动态",
            normalImage: "tab_moment_normal",
            selectedImage: "tab_moment_selected"
        )
        
        let blankVC2 = UIViewController()
        blankVC2.view.backgroundColor = .white
        blankVC2.tabBarItem = createTabBarItem(
            title: "我的",
            normalImage: "tab_mine_normal",
            selectedImage: "tab_mine_selected"
        )
        
        viewControllers = [blankVC1, blankVC2]
        selectedIndex = 0
        
        NSLog("[NewTabBarController] 初始 ViewControllers 设置完成")
    }
    
    /// 创建 TabBarItem
    /// - Parameters:
    ///   - title: 标题
    ///   - normalImage: 未选中图标名称
    ///   - selectedImage: 选中图标名称
    /// - Returns: UITabBarItem
    private func createTabBarItem(title: String, normalImage: String, selectedImage: String) -> UITabBarItem {
        let item = UITabBarItem(
            title: title,
            image: UIImage(named: normalImage)?.withRenderingMode(.alwaysOriginal),
            selectedImage: UIImage(named: selectedImage)?.withRenderingMode(.alwaysOriginal)
        )
        return item
    }
    
    // MARK: - Public Methods
    
    /// 登录成功后刷新 TabBar
    /// - Parameter isLogin: 是否已登录
    @objc func refreshTabBar(isLogin: Bool) {
        isLoggedIn = isLogin
        
        if isLogin {
            setupLoggedInViewControllers()
        } else {
            setupInitialViewControllers()
        }
        
        NSLog("[NewTabBarController] TabBar 已刷新，登录状态: \(isLogin)")
    }
    
    /// 设置登录后的 ViewControllers
    private func setupLoggedInViewControllers() {
        // TODO: 等 NewMomentViewController 和 NewMineViewController 创建后替换
        // let momentVC = NewMomentViewController()
        // let mineVC = NewMineViewController()
        
        let momentVC = UIViewController()
        momentVC.view.backgroundColor = .white
        momentVC.tabBarItem = createTabBarItem(
            title: "动态",
            normalImage: "tab_moment_normal",
            selectedImage: "tab_moment_selected"
        )
        
        let mineVC = UIViewController()
        mineVC.view.backgroundColor = .white
        mineVC.tabBarItem = createTabBarItem(
            title: "我的",
            normalImage: "tab_mine_normal",
            selectedImage: "tab_mine_selected"
        )
        
        viewControllers = [momentVC, mineVC]
        selectedIndex = 0
        
        NSLog("[NewTabBarController] 登录后 ViewControllers 设置完成")
    }
}

// MARK: - UITabBarControllerDelegate

extension NewTabBarController: UITabBarControllerDelegate {
    
    override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
        NSLog("[NewTabBarController] 选中 Tab: \(item.title ?? "Unknown")")
    }
}

// MARK: - OC Compatibility

extension NewTabBarController {
    
    /// OC 兼容：创建实例的工厂方法
    @objc static func create() -> NewTabBarController {
        return NewTabBarController()
    }
}