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

namespace CommonLib.DAQ
{
    public class MCM204Wrapper
    { 
        // 定义常量
        public const int MAX_CH_NUM = 4;                // 通道数
        //采集卡
        public const int DATA_COUNT_PERCH = 32768;  // 每通道采样点数
        public const int SAMPLING_RATE = 32000;    // 每通道采样率为128KS/s
         
        /// <summary>
        /// DLL加载路径
        /// </summary>
        private const string DLLName = "MCM6204ACQDLL.dll";

        /// <summary>
        /// 扫描设备数量
        /// </summary>
        /// <param name="devCount">设备数量</param>
        /// <returns>成功：0，失败：-1</returns>
        [DllImport(DLLName, EntryPoint = "ScanListDevice", CallingConvention = CallingConvention.Cdecl)]
        private static extern int ScanListDevice(StringBuilder HostNames ,ref int devCount);


        public static int ScanListDevice(ref string[] HostNames, ref int devCount)
        { 
            StringBuilder buf = new StringBuilder();
            buf.Length = 10000;
            int errorcode = ScanListDevice(buf, ref devCount);
            HostNames = buf.ToString().Split(new char[]
            {
                ';'
            },StringSplitOptions.RemoveEmptyEntries); 
            return errorcode;
        }


        /// <summary>
        /// 打开添加的设备
        /// </summary>
        /// <param name="boardIDs">板卡号数组</param>
        /// <param name="devCount">待打开的板卡数量</param>
        /// <returns>返回结果 成功：0，失败：-1</returns>
        //[DllImport(DLLName, EntryPoint = "OpenDevices", CallingConvention = CallingConvention.Cdecl)]
        //public static extern int OpenDevices(int[] boardIDs, int devCount);

        [DllImport(DLLName, EntryPoint = "OpenDevice", CallingConvention = CallingConvention.Cdecl)]
        public static extern int OpenDevice(string HostName);

        /// <summary>
        /// 配置打开板卡的参数
        /// </summary>
        /// <param name="devAiConfigParamArray">板卡参数，通道数、采样率、采样点数</param>
        /// <param name="devCount">打开的设备数量</param>
        /// <returns>返回结果 成功：0，失败：-1</returns>
        //[DllImport(DLLName, EntryPoint = "ConfigAIParams", CallingConvention = CallingConvention.Cdecl)]
        //public static extern int ConfigAIParams(AIConfigParam[] devAiConfigParamArray, int devCount);

        [DllImport(DLLName, EntryPoint = "ConfigAIParam", CallingConvention = CallingConvention.Cdecl)]
        public static extern int ConfigAIParam(string HostName,ref AIConfigParam devAiConfigParamArray);
        /// <summary>
        /// 启动添加的板卡，开始采集数据
        /// </summary>
        /// <returns>返回结果 成功：0，失败：-1</returns>
        //[DllImport(DLLName, EntryPoint = "StartDevices", CallingConvention = CallingConvention.Cdecl)]
        //public static extern int StartDevices();

        [DllImport(DLLName, EntryPoint = "StartDevice", CallingConvention = CallingConvention.Cdecl)]
        public static extern int StartDevice(string HostName);

        /// <summary>
        /// 获取板卡数据
        /// </summary>
        /// <param name="dataBuf">二维数组的值</param>
        /// <returns>返回结果 成功：0，失败：-1</returns>
        [DllImport(DLLName, EntryPoint = "GetDataDevice", CallingConvention = CallingConvention.Cdecl)]
        public static extern   int GetDataDevice(string HostName,double[,] dataBuf);
         

        /// <summary>
        /// 使添加的设备停止采集
        /// </summary>
        /// <returns>返回结果 成功：0，失败：-1</returns>
        [DllImport(DLLName, EntryPoint = "StopDevice", CallingConvention = CallingConvention.Cdecl)]
        public static extern int StopDevice(string HostName);

        /// <summary>
        /// 关闭添加的设备
        /// </summary>
        /// <returns>返回执行的结果</returns>
        [DllImport(DLLName, EntryPoint = "CloseDevice", CallingConvention = CallingConvention.Cdecl)]
        public static extern int CloseDevice(string HostName);
         
    }

    /// <summary>
    /// AI配置参数
    /// </summary>
    public struct AIConfigParam
    {
        public int chnsCount;                    // 通道数，通道从0添加至chnsCount-1
        public double sampleRate;                // 每通道采样率
        public uint sampleToAcquire;             // 每通道采样点数
    }
}