//
//  SPLocalizedManager.swift
//  ShortPlay
//
//  Created by 曾觉新 on 2025/4/8.
//

import UIKit

class SPLocalizedManager: NSObject {
    static let shared = SPLocalizedManager()
    
    private let userDefaultsKey = "AppLocalized"
    
    // 获取当前语言代码（如果用户未手动设置，则返回系统语言）
    var currentLocalizedKey: String {
        get {
//            return UserDefaults.standard.string(forKey: userDefaultsKey) ?? Locale.preferredLanguages.first ?? "en"
            return "en"
        }
        set {
            UserDefaults.standard.set(newValue, forKey: userDefaultsKey)
            UserDefaults.standard.synchronize()
            NotificationCenter.default.post(name: SPLocalizedManager.localizedDidChange, object: nil)
        }
    }
    
    // 判断是否跟随系统
    var isFollowingSystem: Bool {
        return UserDefaults.standard.string(forKey: userDefaultsKey) == nil
    }
    
    // 还原为系统默认语言
    func resetToSystemLanguage() {
        UserDefaults.standard.removeObject(forKey: userDefaultsKey)
        UserDefaults.standard.synchronize()
    }
    
    // 获取本地化字符串
    func localizedString(forKey key: String, tableName: String? = nil) -> String {
        if let selectedLanguage = UserDefaults.standard.string(forKey: userDefaultsKey),
           let bundlePath = Bundle.main.path(forResource: selectedLanguage, ofType: "lproj"),
           let bundle = Bundle(path: bundlePath) {
            return bundle.localizedString(forKey: key, value: nil, table: tableName)
        } else {
            return NSLocalizedString(key, tableName: tableName, bundle: .main, value: "", comment: "")
        }
    }
}

extension SPLocalizedManager {
        
    static let localizedDidChange = Notification.Name(rawValue: "SPLocalizedManager.localizedDidChange")
    
}

extension String {
    var localized: String {
        return SPLocalizedManager.shared.localizedString(forKey: self)
    }
}