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

namespace PLCManager
{
    public class PlcOperation
    {
        /// <summary>
        /// 通过key 写入
        /// </summary>
        /// <param name="equipkey"></param>
        /// <param name="data"></param>
        public void WriteByWord(string equipkey, object[] data)
        {
            PlcData.Instance.PlcWriteByEquipKey(equipkey, data);
        }


        public bool WriteByWord(int Block, object[] data)
        {
            return PlcData.Instance.PlcWriteByBlock(Block,0,data);
        }
   

        /// <summary>
        /// 按位写入  method 0写入0，1写入1， 2取反
        /// </summary>
        /// <param name="equipkey"></param>
        /// <param name="bitlen">第几位</param>
        /// <param name="method">0写入0，1写入1， 2取反</param>
        /// <param name="clear">是否将其他位清零</param>
        /// <returns></returns>
        public int writePLCbybit(string equipkey, int bitlen, int method,bool clear)
        {
            //ICSharpCode.Core.LoggingService.Debug("P获取中间上次值" + DateTime.Now.ToString("HH:mm:ss:fff"));
            int oldvalue=0;
            if (!clear)
            {
                try
                {
                    oldvalue = GetLastValue(equipkey);
                }
                catch
                {
                    oldvalue = 0;
                }
                
            }             
            int newvlaue = GetNewValue(oldvalue, bitlen, method);

            object[] buff = new object[1];
            buff[0] = newvlaue;
            PlcData.Instance.PlcWriteByEquipKey(equipkey, buff);
            return newvlaue;
        }
        



        /// <summary>
        /// 获取当前值
        /// </summary>
        /// <param name="equipkey"></param>
        /// <returns>当前值</returns>
        public int GetLastValue(string equipkey)
        {
            PlcData.DataKeyValue abc = new PlcData.DataKeyValue(equipkey);
            PlcData.DataKeyValue.Value abcd = abc.LastValuebeforeMath;
            return abcd.ToInt();
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="oldvalue">原值</param>
        /// <param name="bitlen">设置第几位</param>
        /// <param name="m">0设bitlen为0，1设bitlen为1 2设bitlen取反</param>
        /// <returns></returns>
        private int GetNewValue(int oldvalue, int bitlen, int m)
        {
            switch (m)
            {
                case 0:
                    int i = 99999;
                    i= setBitValue0(oldvalue, bitlen);
                    return i;
                case 1:
                    return setBitValue1(oldvalue, bitlen);
                case 2:
                    return SetbitValueNegate(oldvalue, bitlen);
                default:
                    return oldvalue;
            }
        }
        /// <summary>
        ///int的将第bitlen位取反
        /// </summary>
        /// <param name="oldvalue"></param>
        /// <param name="bitlen"></param>
        /// <returns></returns>
        private int SetbitValueNegate(int oldvalue, int bitlen)
        {
            return (oldvalue ^ (int)(1 << bitlen));
        }

        //将某位设为1
        private int setBitValue1(int oldvalue, int bitlen)
        {
            return (oldvalue | (1 << bitlen));
        }

        //强某位设为0
        private int setBitValue0(int oldvalue, int bitlen)
        {
            int a = (~(1 << bitlen));
              return (a & oldvalue);             
        }

        public Object[] floatToObject(float ff)
        {
            //正负符号，默认为0
            byte flag = 0;
            if (ff < 0)
            {
                flag = 128;
                ff = ff * -1;
            }
            byte[] floatByte = BitConverter.GetBytes(ff);


            byte[] lowhByte = new byte[4];
            lowhByte[0] = floatByte[0];
            lowhByte[1] = floatByte[1];
            lowhByte[2] = 0;
            lowhByte[3] = 0;


            byte[] highByte = new byte[4];
            highByte[0] = floatByte[2];
            highByte[1] = floatByte[3];
            highByte[2] = 0;
            highByte[3] = 0;

            highByte[1] =(byte)( highByte[1] + flag);

            UInt32 low = BitConverter.ToUInt32(lowhByte, 0);

            int high = BitConverter.ToInt16(highByte, 0);

            object[] buff = new object[2];

            buff[0] = low;
            buff[1] = high;
            return buff;
        }

        private float convertTofloat(object[] buff)
        {
            //正负标志位
            int flag = 1;
            int b = Convert.ToInt32(buff[0]);
            int a = Convert.ToInt32(buff[1]);
            if (a >= 32768)
            {
                a = a - 32768;
                flag = -1;
            }
            byte[] low = System.BitConverter.GetBytes(b);
            byte[] high = System.BitConverter.GetBytes(a);
            byte[] abc = new byte[4];
            for (int i = 0; i < 2; i++)
            {
                abc[i] = low[i];
            }
            for (int i = 0; i < 2; i++)
            {
                abc[i + 2] = high[i];
            }
            float result= BitConverter.ToSingle(abc, 0);
            return result * flag;
        }

        public int [] ReadBlockToInt(string Block,int len)
        {
            object [] buff=null;
            PlcData.Instance.PlcReadbyBlock(Block, 0, len, out buff);
            int[] dataValue = new int[buff.Length];
            for (int i = 0; i < buff.Length; i++)
            {
                int ivalue = 0;
                if (buff[i] != null && buff[i] != DBNull.Value
                    && int.TryParse(buff[i].ToString(), out ivalue))
                {
                    dataValue[i] = ivalue;
                }
                else
                {
                    dataValue[i] = 0;
                }
            }
            return dataValue;
        } 

        public float[] ReadBlockToFloat(string Block,int len)
        {
            object [] buff=null;
            PlcData.Instance.PlcReadbyBlock(Block, 0, len, out buff);
            float[] floatdata = new float[buff.Length / 2];
            for (int i = 0; i < buff.Length; i = i + 2)
            {
                object[] bu = new object[2];
                bu[0] = buff[i];
                bu[1] = buff[i + 1];
                floatdata[i / 2] = convertTofloat(bu);
            }
            return floatdata;
        }

     }
}