using System.Diagnostics;

string readString(BinaryReader reader)
{
    var len = reader.ReadInt32();
    var strBytes = reader.ReadBytes(len);
    return System.Text.Encoding.UTF8.GetString(strBytes).TrimEnd('\0');
}

void readTypes(BinaryReader reader)
{
    var typeLenPos = reader.BaseStream.Position;
    var typeLen = reader.ReadInt32();
    var typeListHeader = readString(reader);
    var numTypes = reader.ReadInt32();
    var numTypes2 = reader.ReadInt32();
    List<(string, string)> types = new();
    for (int i = 0; i < numTypes; i++)
    {
        var key = readString(reader);
        var val = readString(reader);
        types.Add((key, val));

        var typeBuf1 = reader.ReadInt32();
        if (types.Count < numTypes)
        {
            var typeBuf2 = reader.ReadInt32();
        }
    }

    Debug.Assert(reader.BaseStream.Position == typeLenPos + typeLen);
}

using var file = File.OpenRead(@"C:\Users\chris\AppData\Roaming\Warner Bros. Interactive Entertainment\LEGO Star Wars - The Skywalker Saga\SAVEDGAMES\STEAM\21492523\SLOT1\GAMEPROGRESS.BLOB");
using BinaryReader reader = new(file);
var header = reader.ReadInt32();
var str1 = readString(reader);
var val1 = reader.ReadInt32();
var buf1 = reader.ReadInt32();
var buf2 = reader.ReadInt32();
readTypes(reader);

var classListLenPos = reader.BaseStream.Position;
var classListLen = reader.ReadInt32();
var classListHeader = readString(reader);
var numClasses = reader.ReadInt32();
for (int i = 0; i < numClasses; i++)
{
    var classLen = reader.ReadInt32();
    var classStr = readString(reader);
    var className = readString(reader);
    var numProps = reader.ReadInt32();

    for (int j = 0; j < numProps; j++)
    {
        var propName = readString(reader);
        // this ain't right. figure out how to parse property values
        var propBuf1 = reader.ReadInt16();
        var propVal = reader.ReadInt32();
        var propBuf2 = reader.ReadInt16();
    }
}

Console.WriteLine("done");