//
//  LanguageManager.swift
//  VDS
//
//  Created by Matt Bruce on 9/25/24.
//

import Foundation

// Language Manager to control the current language setting
public class LanguageManager {
   
    // Enum to define supported languages
    public enum SupportedLanguage: String, CustomStringConvertible {
        case english = "en"
        case spanish = "es"
        
        public var description: String { self == .english ? "English" : "Spanish"}
    }
   
    // Private static variable to hold the in-memory current language
    private static var _currentLanguage: SupportedLanguage? {
        didSet {
            TextStyle.Provider.updateCurrentStyles()
        }
    }
   
    // Static property to manage the current language setting
    public static var currentLanguage: SupportedLanguage {
        get {
            // Check if there is an in-memory language setting
            guard let _currentLanguage else {
                
                // set default
                var deviceCurrentLanguage: SupportedLanguage = .english
                
                // Check device's preferred language
                let deviceLanguage = Locale.preferredLanguages.first ?? "en"
                if deviceLanguage.starts(with: "es") {
                    deviceCurrentLanguage = .spanish
                }
                
                _currentLanguage = deviceCurrentLanguage
                return deviceCurrentLanguage
            }
            
            return _currentLanguage
        }
        set {
            // Set the in-memory language
            _currentLanguage = newValue
        }
    }

    // Method to set language using a language code string
    public static func setLanguage(with code: String) {
        if code.starts(with: "es") {
            _currentLanguage = .spanish
        } else {
            _currentLanguage = .english
        }
    }
}