using System;
using System.Runtime.InteropServices;

namespace DeltaShell.Plugins.XBeach.Api
{
    public class XBeachDll
    {
        public struct FArrayType
        {
            public int rank;
            public byte btype;
            public byte type;
            public IntPtr array;
        }

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern void SetDllDirectory(string lpPathName);

#if MONO
#else
        const string DllPath = "xbeachlibrary_dynamic.dll";
#endif

        // Import xbeach                        
        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int init();

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int outputext();

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int executestep();

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int finalize();

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int getdoubleparameter(string name, ref double value, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int getintparameter(string name, ref int value, int len);

        public static int getparameter(string name, ref double value)
        {
            return getdoubleparameter(name, ref value, name.Length);
        }

        public static int getparameter(string name, ref int value)
        {
            return getintparameter(name, ref value, name.Length);
        }

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int getarray(string name, ref FArrayType array, int len);

        public static int getarray(string name, ref FArrayType array)
        {
            return getarray(name, ref array, name.Length);
        }

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get1ddoublearray([In] string name, [In, Out] ref IntPtr array, int len);

        public static int get1ddoublearray(string name, ref double[] array) 
        {
            var cptr = new IntPtr();
            var result = get1ddoublearray(name, ref cptr, name.Length);
            Marshal.Copy(cptr, array, 0, array.Length);
            return result;
        }

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get2ddoublearray(string name, ref IntPtr array, int len);

        public static int get2ddoublearray(string name, ref IntPtr array)
        {
            return get2ddoublearray(name, ref array, name.Length);
        }

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get3ddoublearray(string name, ref double[, ,] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get4ddoublearray(string name, ref double[, ,] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get1dintarray(string name, ref int[] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get2dintarray(string name, ref int[,] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get3dintarray(string name, ref int[, ,] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int get4dintarray(string name, ref int[, , ,] array, int len);

        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern int set2ddoublearray(string name, ref IntPtr array, int len);

        public static int set2ddoublearray(string name, ref IntPtr array)
        {
            return set2ddoublearray(name, ref array, name.Length);
        }

        //Logging
        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
        public static extern void assignlogdelegate([MarshalAs(UnmanagedType.FunctionPtr)] MyDelegate del);

        [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
        public delegate void MyDelegate(ref int code, string message, ref int len);

        [DllImport(DllPath,CallingConvention = CallingConvention.Cdecl)]
        public static extern int writetolog();

    }
}