diff --git a/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.csproj b/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.csproj
index 3249510..0199c4b 100644
--- a/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.csproj
+++ b/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.csproj
@@ -11,4 +11,8 @@
       <ProjectReference Include="..\ParadoxSaveParser.Lib\ParadoxSaveParser.Lib.csproj" />
     </ItemGroup>
 
+    <ItemGroup>
+      <PackageReference Include="DTLib.Demystifier" Version="1.1.0" />
+    </ItemGroup>
+
 </Project>
diff --git a/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.http b/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.http
deleted file mode 100644
index 41a6bb5..0000000
--- a/ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.http
+++ /dev/null
@@ -1,6 +0,0 @@
-@ParadoxSaveParser.WebAPI_HostAddress = http://localhost:5226
-
-GET {{ParadoxSaveParser.WebAPI_HostAddress}}/weatherforecast/
-Accept: application/json
-
-###
diff --git a/ParadoxSaveParser.WebAPI/Program.cs b/ParadoxSaveParser.WebAPI/Program.cs
index 950426c..1d26853 100644
--- a/ParadoxSaveParser.WebAPI/Program.cs
+++ b/ParadoxSaveParser.WebAPI/Program.cs
@@ -2,12 +2,10 @@ global using System;
 using System.Collections.Concurrent;
 using System.IO;
 using System.Linq;
-using System.Net;
 using System.Text.Json;
-using System.Text.Json.Serialization;
+using DTLib.Demystifier;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
 using ParadoxSaveParser.Lib;
 
@@ -15,62 +13,120 @@ namespace ParadoxSaveParser.WebAPI;
 
 public enum SaveFileProcessingStatus
 {
-    NotFound, Uploading, Parsing, SavingResults, Done, Error
+    Initialized, Uploading, Parsing, SavingResults, Done, Error
+}
+
+public enum Game
+{
+    Unknown, EU4
 }
 
 public class SaveFileMetadata
 {
-    public required string guid;
+    public required string id { get; init; }
+    public required Game game { get; init; }
     public required SaveFileProcessingStatus status { get; set; }
+
+    public string? errorMesage { get; set; }
+    
+    private static readonly JsonSerializerOptions _jsonOptions = new() { WriteIndented = true };
+    public void SaveToFile()
+    {
+        using var metaFile = File.Open(PathHelper.GetMetaFilePath(id), FileMode.CreateNew, FileAccess.Write);
+        JsonSerializer.Serialize(metaFile, this, _jsonOptions);
+    }
+}
+
+public static class PathHelper
+{
+    
+    public const string DATA_DIR = "data";
+    public static string SAVES_DIR = Path.Join(DATA_DIR, "saves");
+    public static string GetMetaFilePath(string save_id) => Path.Join(SAVES_DIR, save_id + ".meta.json");
+    public static string GetEU4SaveFilePath(string save_id) => Path.Join(SAVES_DIR, save_id + ".eu4");
 }
 
 public class Program
 {
-    private const string DATA_DIR = "data";
-    private static string SAVES_DIR = Path.Join(DATA_DIR, "saves");
     private static ConcurrentDictionary<string, SaveFileMetadata> _saveMetadataStorage = new();
+    private static WebApplication _app = null!;
     
     public static void Main(string[] args)
     {
         var builder = WebApplication.CreateBuilder(args);
-        var app = builder.Build();
+        _app = builder.Build();
 
-        foreach (var metaFilePath in Directory.GetFiles(SAVES_DIR, "*.meta.json", SearchOption.TopDirectoryOnly))
+        foreach (var metaFilePath in Directory.GetFiles(PathHelper.SAVES_DIR, "*.meta.json", SearchOption.TopDirectoryOnly))
         {
             using var metaFile = File.Open(metaFilePath, FileMode.Open, FileAccess.Read);
             var meta = JsonSerializer.Deserialize<SaveFileMetadata>(metaFile) ?? throw new NullReferenceException(metaFilePath);
             if (meta.status != SaveFileProcessingStatus.Done)
             {
-                app.Logger.Log(LogLevel.Warning, $"metadata file '{metaFilePath}' status has invalid status {meta.status}"));
+                _app.Logger.Log(LogLevel.Warning, "metadata file '{metaFilePath}' status has invalid status {status}", metaFilePath, meta.status);
             }
 
-            if(!_saveMetadataStorage.TryAdd(meta.guid, meta))
+            if(!_saveMetadataStorage.TryAdd(meta.id, meta))
                 throw new Exception("Guid collision!");
         }
         
-        app.UseHttpsRedirection();
-        app.MapPost("/parse/eu4", async httpContext =>
+        _app.UseHttpsRedirection();
+        _app.MapPost("/parse/eu4", (HttpContext httpContext) =>
         {
             var remoteFile = httpContext.Request.Form.Files.FirstOrDefault();
-            if(remoteFile is null)
-                return;
-            string save_id = Guid.NewGuid().ToString();
-            string meta_file_path = Path.Join(SAVES_DIR, save_id + ".meta.json");
-            // string save_file_path = Path.Join(SAVES_DIR, save_id + ".eu4");
-            // await using var metaFile = File.Open(meta_file_path, FileMode.CreateNew, FileAccess.Write);
-            if (File.Exists(meta_file_path))
+            if(remoteFile is null || !remoteFile.FileName.EndsWith(".eu4"))
+                throw new Exception($"Invalid file format: {remoteFile?.FileName}");
+            
+            string saveId = Guid.NewGuid().ToString();
+            string metaFilePath = PathHelper.GetMetaFilePath(saveId);
+            if (File.Exists(metaFilePath))
             {
                 httpContext.Response.StatusCode = StatusCodes.Status500InternalServerError;
-                throw new Exception($"Guid collision! file {meta_file_path} already exists.")
+                throw new Exception($"Guid collision! file {metaFilePath} already exists.");
+            }
+            
+            var meta = new SaveFileMetadata
+            {
+                id = saveId,
+                game = Game.EU4,
+                status = SaveFileProcessingStatus.Initialized,
+            };
+            if (!_saveMetadataStorage.TryAdd(saveId, meta))
+            {
+                throw new Exception($"Guid collision! Can't create metadata with id {saveId}");
             }
 
-            await using var saveFile = 
-            await remoteFile.OpenReadStream().CopyToAsync();
-            var parser = new ParserEU4(stream);
-            
-            
+            BeginEU4SaveParse(remoteFile, meta);
+            return meta;
         });
         
-        app.Run();
+        _app.Run();
+    }
+
+    private static async void BeginEU4SaveParse(IFormFile remoteFile, SaveFileMetadata meta)
+    {
+        try
+        {
+            meta.status = SaveFileProcessingStatus.Uploading;
+            string saveFilePath = PathHelper.GetEU4SaveFilePath(meta.id);
+            await using var saveFile = File.Open(saveFilePath, FileMode.CreateNew, FileAccess.ReadWrite);
+            await using (var remoteStream = remoteFile.OpenReadStream())
+            {
+                await remoteStream.CopyToAsync(saveFile);
+            }
+
+            meta.status = SaveFileProcessingStatus.Parsing;
+            saveFile.Seek(0, SeekOrigin.Begin);
+            var parser = new ParserEU4(saveFile);
+            //var result = parser.Parse();
+            meta.status = SaveFileProcessingStatus.SavingResults;
+            // save
+            meta.status = SaveFileProcessingStatus.Done;
+        }
+        catch (Exception ex)
+        {
+            meta.status = SaveFileProcessingStatus.Error;
+            string errorMesage = ex.ToStringDemystified();
+            _app.Logger.Log(LogLevel.Error, "EU4SaveParse Error: {errorMesage}", errorMesage);
+        }
     }
 }
\ No newline at end of file