using System;
using System.Text;
using System.Runtime.InteropServices;

namespace Deltares.RtcTools.Net
{
	internal class RtcToolsDllNative
	{
        private const string Pathdllfile = @"RTCTools_OpenMI.dll"; // do not change! When deploying RTCTools for use
                                                                   // with other software RTCTools_OpenMI.dll is expected to
                                                                   // sit next to Deltares.RtcTools.Net.dll

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void LoadRtcToolsDll();

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr CreateOmiAccessableRtcToolsClass(IntPtr schemaDirectory, IntPtr xmlFilesDirectory);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiInitialize(IntPtr @class);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void FinishOmiAccessableRtcToolsClass(IntPtr @class);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void PrepareOmiAccessableRtcToolsClass(IntPtr @class);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void DisposeOmiAccessableRtcToolsClass(IntPtr @class);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiGetStartTimeString(IntPtr @class, StringBuilder retstring, int len);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiGetEndTimeString(IntPtr @class, StringBuilder retstring, int len);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiGetCurrentTimeString(IntPtr @class, StringBuilder retstring, int len);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern int OmiGetInputExchangeItemCount(IntPtr @class);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern int OmiGetOutputExchangeItemCount(IntPtr @class);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiInputExchangeItemGetElementId(IntPtr @class, int index, StringBuilder retstring, int len);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiOutputExchangeItemGetElementId(IntPtr @class, int index, StringBuilder retstring, int len);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiInputExchangeItemGetQuantityId(IntPtr @class, int index, StringBuilder retstring, int len);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiOutputExchangeItemGetQuantityId(IntPtr @class, int index, StringBuilder retstring, int len);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiInputExchangeItemGetUnit(IntPtr @class, int index, StringBuilder retstring, int len);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiOutputExchangeItemGetUnit(IntPtr @class, int index, StringBuilder retstring, int len);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern void OmiSetInputValue(IntPtr @class, int index, double value, int timeStepCount);

		[DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
		public static extern double OmiGetOutputValue(IntPtr @class, int index);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiPerformTimeStep(IntPtr @class, int timeStepCount);

        [DllImport(Pathdllfile, CallingConvention = CallingConvention.Cdecl)]
        public static extern void OmiWriteStateFile(IntPtr @class, IntPtr filepath, IntPtr filename);
	}
}