using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace netapi_con
{
    class Program
    {
        public enum hist_types
        {
            [Description("HST_1MIN")]
            HST_1MIN = 1,
            [Description("HST_6MIN")]
            HST_6MIN = 2,
            [Description("HST_1HOUR")]
            HST_1HOUR = 3,
            [Description("HST_8HOUR")]
            HST_8HOUR = 4,
            [Description("HST_24HOUR")]
            HST_24HOUR = 5,
            [Description("HST_5SECF")]
            HST_5SECF = 6,
            [Description("HST_1HOURE")]
            HST_1HOURE = 7,
            [Description("HST_8HOURE")]
            HST_8HOURE = 8,
            [Description("HST_24HOURE")]
            HST_24HOURE = 9
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
        public struct GetPntData
        {
            [MarshalAs(UnmanagedType.LPStr)]
            public String Point_name;
            public UInt32 Point_type_num;
            public Int32 Getpnt_status;

            public GetPntData(String Point_name, UInt32 Point_type_num, Int32 Getpnt_status)
            {
                this.Point_name = Point_name;
                this.Point_type_num = Point_type_num;
                this.Getpnt_status = Getpnt_status;
            }
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
        public struct GetArchData
        {
            public UInt16 hist_type;
            public UInt32 hist_start_date;
            public Single hist_start_time;
            public UInt16 num_hist;
            public UInt16 num_points;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
            public UInt16[] point_type_nums;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)]
            public UInt16[] point_params;

            [MarshalAs(UnmanagedType.LPStr)]
            public String archive_path;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 25)]
            public Single[] hist_values;

            public UInt16 gethst_status;

            public GetArchData(UInt16 hist_type, UInt32 hist_start_date, Single hist_start_time, UInt16 num_hist, UInt16 num_points, UInt32[] point_type_nums,
                               UInt16[] point_params, String archive_path, Single[] hist_values, UInt16 gethst_status)
            {
                this.hist_type = hist_type;
                this.hist_start_date = hist_start_date;
                this.hist_start_time = hist_start_time;
                this.num_hist = num_hist;
                this.num_points = num_points;
                this.point_type_nums = point_type_nums;
                this.point_params = point_params;
                this.archive_path = archive_path;
                this.hist_values = hist_values;
                this.gethst_status = gethst_status;
            }
        }

        static void Main(string[] args)
        {
            string p_name = "71LBA10CF001";

            string server = "SRV7A";
            int num_points = 1;

            GetPntData[] rgetpnt_data_str_r = { new GetPntData(p_name, 0, 0) };


            int status = NativeMethods.rhsc_point_numbers_2(server, num_points, rgetpnt_data_str_r);

            UInt32[] point_type_nums = new UInt32[1];

            foreach (GetPntData element in rgetpnt_data_str_r)
            {
                Console.WriteLine(status.ToString("x4") + "\t" + element.Point_type_num.ToString() + "\t" + element.Getpnt_status.ToString());
                point_type_nums[0] = element.Point_type_num;
            }

            UInt16 hist_type = (UInt16)hist_types.HST_1HOUR;
            DateTime start_date = new DateTime(2017, 05, 29, 04, 00, 00);
            UInt32 hist_start_date = (UInt32)start_date.Subtract(new DateTime(1981, 1, 1, 0, 0, 0, DateTimeKind.Local)).Days;
            Single hist_start_time = (Single)(start_date.Hour * 60  * 60 + start_date.Minute * 60 + start_date.Second);
            UInt16[] point_params = new UInt16[1];
            point_params[0] = 32763;
            String archive_path = "";

            Single[] hist_values = new Single[25];
            UInt16 gethst_status = 0;

            GetArchData[] gethstpar_date_data = { new GetArchData(hist_type, hist_start_date, hist_start_time, 25, 1, point_type_nums, point_params, archive_path, hist_values, gethst_status) };

            status = NativeMethods.rgethstpar_date(server, 1, gethstpar_date_data);

            Console.WriteLine("status2 - " + status.ToString("x4"));

            foreach (GetArchData element in gethstpar_date_data)
            {
                Console.WriteLine("Date -" + "\t" + element.hist_start_date.ToString() + "\t" + element.hist_start_time.ToString("F") + "\t" + element.hist_values[0].ToString());
            }
        }

        internal class NativeMethods
        {
            [DllImportAttribute("hscnetapi.dll", CharSet = CharSet.Ansi, EntryPoint = "rhsc_point_numbers_2", CallingConvention = CallingConvention.StdCall)]
            public static extern int rhsc_point_numbers_2([MarshalAs(UnmanagedType.LPStr)] String server, int num_points, [In, Out] GetPntData[] rgetpnt_data_str);

            [DllImportAttribute("hscnetapi.dll", CharSet = CharSet.Ansi, EntryPoint = "rgethstpar_date", CallingConvention = CallingConvention.StdCall)]
            public static extern int rgethstpar_date([MarshalAs(UnmanagedType.LPStr)] String server, int num_gethsts, [In, Out] GetArchData[] gethstpar_date_data);
        }
    }
}