using System;
using System.IO;
using System.Collections.Generic;
using UnityEngine;

public class LocalizationManager : MonoBehaviour
{
 private string currentLanguage;
 private Dictionary<string, string> localizedText;
 public static bool isReady = false;

 public delegate void ChangeLangText();
 public event ChangeLangText OnLanguageChanged;

 void Awake()
 {
 if (!PlayerPrefs.HasKey("Language"))
 {
 if (Application.systemLanguage == SystemLanguage.Russian || Application.systemLanguage == SystemLanguage.Ukrainian || Application.systemLanguage == SystemLanguage.Belarusian)
 {
 PlayerPrefs.SetString("Language", "ru_RU");
 }
 else
 {
 PlayerPrefs.SetString("Language", "en_US");
 }
 }
 currentLanguage = PlayerPrefs.GetString("Language");

 LoadLocalizedText(currentLanguage);
 }

 public void LoadLocalizedText(string langName)
 {
 string path = Application.streamingAssetsPath + "/Languages/" + langName + ".json";

 string dataAsJson;

 if (Application.platform == RuntimePlatform.Android)
 {
 WWW reader = new WWW(path);
 while (!reader.isDone) { }

 dataAsJson = reader.text;
 }
 else
 {
 dataAsJson = File.ReadAllText(path);
 }

 LocalizationData loadedData = JsonUtility.FromJson<LocalizationData>(dataAsJson);

 localizedText = new Dictionary<string, string>();
 for (int i = 0; i < loadedData.items.Length; i++)
 {
 localizedText.Add(loadedData.items[i].key, loadedData.items[i].value);
 }

 PlayerPrefs.SetString("Language", langName);
 currentLanguage = PlayerPrefs.GetString("Language");
 isReady = true;

 OnLanguageChanged?.Invoke();
 }

 public string GetLocalizedValue(string key)
 {
 if (localizedText.ContainsKey(key))
 {
 return localizedText[key];
 }
 else
 {
 throw new Exception("Localized text with key \"" + key + "\" not found");
 }
 }

 public string CurrentLanguage
 {
 get
 {
 return currentLanguage;
 }
 set
 {
 PlayerPrefs.SetString("Language", value);
 currentLanguage = PlayerPrefs.GetString("Language");
 }
 }
 public bool IsReady
 {
 get
 {
 return isReady;
 }
 }
}