//
//  LanguageManager.swift
//  MNNLLMiOS
//
//  Created by 游薪渝(揽清) on 2025/7/1.
//

import Foundation

class LanguageManager {
    static let shared = LanguageManager()

    var languageOptions: [String: String] {
        ["en": NSLocalizedString("language.english", comment: ""),
         "zh-Hans": NSLocalizedString("language.simplifiedChinese", comment: "")]
    }

    private let languageKey = "AppLanguage"

    var currentLanguage: String {
        get {
            return UserDefaults.standard.string(forKey: languageKey) ?? getSystemLanguage()
        }
        set {
            UserDefaults.standard.set(newValue, forKey: languageKey)
            UserDefaults.standard.synchronize()
        }
    }

    private func getSystemLanguage() -> String {
        let preferredLanguage = Locale.preferredLanguages.first ?? "en"
        if preferredLanguage.starts(with: "zh") {
            return "zh-Hans"
        } else {
            return "en"
        }
    }

    func applyLanguage(_ code: String) {
        currentLanguage = code

        UserDefaults.standard.set([code], forKey: "AppleLanguages")
        UserDefaults.standard.synchronize()

        NotificationCenter.default.post(name: Notification.Name("LanguageChanged"), object: nil)
    }
}