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

import UIKit

class SPLocalizedManager: NSObject {
    static let shared = SPLocalizedManager()
    private let LocalizedUserDefaultsKey = "SPLocalizedManager.LocalizedUserDefaultsKey"
    private let LocalizedDataUserDefaultsKey = "SPLocalizedManager.LocalizedDataUserDefaultsKey"
    
    
    ///语言列表
    var languageList: [SPLanguageModel]?
    
    ///多语言数据
    private lazy var localizedData: [String : String]? = UserDefaults.standard.object(forKey: LocalizedDataUserDefaultsKey) as? [String : String]
    {
        didSet {
            UserDefaults.standard.set(localizedData, forKey: LocalizedDataUserDefaultsKey)
            UserDefaults.standard.synchronize()
        }
    }
    
    // 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 UserDefaults.standard.string(forKey: LocalizedUserDefaultsKey) ?? "en"
        }
        set {
            UserDefaults.standard.set(newValue, forKey: LocalizedUserDefaultsKey)
            UserDefaults.standard.synchronize()
        }
    }
    
    // 判断是否跟随系统
    var isFollowingSystem: Bool {
        return UserDefaults.standard.string(forKey: LocalizedUserDefaultsKey) == nil
    }
    
    // 还原为系统默认语言
    func resetToSystemLanguage() {
        UserDefaults.standard.removeObject(forKey: LocalizedUserDefaultsKey)
        UserDefaults.standard.synchronize()
    }
    
    // 获取本地化字符串
    func localizedString(forKey key: String, tableName: String? = nil) -> String {
        if let localizedData = localizedData,
           let text = localizedData[key] {
            return text
            
        } else if let selectedLanguage = UserDefaults.standard.string(forKey: LocalizedUserDefaultsKey),
           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 {
    ///获取本地化数据
    func updateLocalizedData(key: String = SPLocalizedManager.shared.currentLocalizedKey, completer: ((_ finish: Bool) -> Void)?) {
        SPSettingAPI.requestLocalizedData(key: key) { [weak self] model in
            guard let self = self else { return }
            guard let model = model else {
                completer?(false)
                return
            }
            if let languageList = model.languages, languageList.count > 0 {
                self.languageList = languageList
            }
            
            if let localizedData = model.translates {
                self.localizedData = localizedData
                completer?(true)
            } else {
                completer?(false)
            }
        }
    }
}



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

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