using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using System.Text;
using System.Runtime.InteropServices;
using RGiesecke.DllExport;


namespace freeExtTest
{
    public class freeExtTest
	{

		public static ExtensionCallback callback;
		public delegate int ExtensionCallback([MarshalAs(UnmanagedType.LPStr)] string name, [MarshalAs(UnmanagedType.LPStr)] string function, [MarshalAs(UnmanagedType.LPStr)] string data);

#if WIN64
		[DllExport("RVExtensionRegisterCallback", CallingConvention = CallingConvention.Winapi)]
#else
		[DllExport("_RVExtensionRegisterCallback@4", CallingConvention = CallingConvention.Winapi)]
#endif
		public static void RVExtensionRegisterCallback([MarshalAs(UnmanagedType.FunctionPtr)] ExtensionCallback func)
		{
			callback = func;
		}

#if WIN64
		[DllExport("RVExtensionVersion", CallingConvention = CallingConvention.Winapi)]
#else
		[DllExport("_RVExtensionVersion@8", CallingConvention = CallingConvention.Winapi)]
#endif
		public static void RvExtensionVersion(StringBuilder output, int outputSize)
		{
			output.Append("Test-Extension v1.0");
		}

#if WIN64
		[DllExport("RVExtension", CallingConvention = CallingConvention.Winapi)]
#else
		[DllExport("_RVExtension@12", CallingConvention = CallingConvention.Winapi)]
#endif
		public static void RvExtension(StringBuilder output, int outputSize,
			[MarshalAs(UnmanagedType.LPStr)] string function)
		{
			output.Append(function);
		}

#if WIN64
		[DllExport("RVExtensionArgs", CallingConvention = CallingConvention.Winapi)]
#else
		[DllExport("_RVExtensionArgs@20", CallingConvention = CallingConvention.Winapi)]
#endif
		public static int RvExtensionArgs(StringBuilder output, int outputSize,
			[MarshalAs(UnmanagedType.LPStr)] string function,
			[MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.LPStr, SizeParamIndex = 4)] string[] args, int argCount)
		{
			foreach (var arg in args)
			{
				output.Append(arg);
			}
			return 0;
		}
	}






}