refactor: cleaup and implemented mvvm

utils/InMemoryDB.cs

@@ -1,5 +1,6 @@
 using System;
 using System.ClientModel;
+using highminded.models;
 using OpenAI;
 using OpenAI.Chat;
 
@@ -7,37 +8,45 @@ namespace highminded.utils;
 
 public class InMemoryDb
 {
-    internal ChatClient ChatClient;
-    internal SettingsManager<AppSettings> SettingsManager;
+    public static readonly InMemoryDb Obj = new InMemoryDb();
+
+    internal readonly SettingsManager<SettingsViewModel> SettingsManager;
+    internal readonly MainViewModel MainViewModel;
+    internal readonly ChatViewModel ChatViewModel;
+    internal readonly SettingsViewModel SettingsViewModel;
+    internal ChatClient? ChatClient;
 
     // Initialize Singleton Class
     private InMemoryDb()
     {
-        SettingsManager = new SettingsManager<AppSettings>();
-        if (SettingsManager.Settings.ApiKey != null)
+        SettingsManager = new SettingsManager<SettingsViewModel>();
+
+        MainViewModel = new MainViewModel();
+        ChatViewModel = new ChatViewModel();
+        SettingsViewModel = new SettingsViewModel();
+        SettingsViewModel = SettingsManager.Settings;
+
+        if (SettingsManager.Settings.ApiKey != string.Empty)
         {
-            InitOpenAIClient();
+            InitOpenAiClient();
         }
     }
 
-    public void InitOpenAIClient()
+    public void SaveSettings()
+    {
+        SettingsManager.Save();
+        InitOpenAiClient();
+    }
+
+    private void InitOpenAiClient()
     {
         ChatClient = new ChatClient(
             model: SettingsManager.Settings.Model,
             credential: new ApiKeyCredential(SettingsManager.Settings.ApiKey),
             options: new OpenAIClientOptions
             {
-                Endpoint = new Uri(SettingsManager.Settings.ApiURL)
+                Endpoint = new Uri(SettingsManager.Settings.ApiUrl)
             }
         );
     }
-
-    public void SaveSettings(AppSettings settings)
-    {
-        SettingsManager.Settings = settings;
-        SettingsManager.Save();
-        InitOpenAIClient();
-    }
-
-    public static readonly InMemoryDb Obj = new InMemoryDb();
 }