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

namespace WCS.Data
{
    public class PlcHelper
    {
        /// <summary>
        /// Byte转二进制
        /// </summary>
        /// <param name="dbItem"></param>
        /// <returns></returns>
        public static string ByteToBinary(byte dbItem)
        {
            char[] cs = Convert.ToString(dbItem, 2).PadLeft(8, '0').ToCharArray();
            Array.Reverse(cs);
            string res = new string(cs);
            return res;
            //return Convert.ToString(dbItem, 2).PadLeft(8,'0');
        }
        /// <summary>
        /// Bytes转二进制
        /// </summary>
        public static string BytesToBinary(byte[] dbItems)
        {
            string result = string.Empty;
            foreach (byte item in dbItems)
            {
                result = result + ByteToBinary(item);
            }
            return result;
        }
        private static string ReadAlaramCode(string alarm)
        {
            string errorResult = string.Empty;
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < alarm.Length; i++)
            {
                int index = i + 1;
                if (Convert.ToInt16(alarm.Substring(i, 1)) == 1)
                {
                    sb.Append(string.Format("{0},", index));
                }
            }
            if (sb.Length > 0)
            {
                errorResult = sb.ToString().TrimEnd(',');
            }
            return errorResult;
        }
        /// <summary>
        /// 查询报警信息
        /// </summary>
        /// <param name="dbItems"></param>
        /// <returns></returns>
        public static string ReadAlaramCodeByBytes(byte[] dbItems)
        {
            if (dbItems == null || dbItems.Count() <= 0)
                return string.Empty;
            else
                return ReadAlaramCode(BytesToBinary(dbItems));
        }
        /// <summary>
        /// Byte转换成二进制并取指定位置数字
        /// </summary>
        /// <param name="Db521Index">db模块</param>
        /// <param name="startIndex">二进制截取的起始位置</param>
        /// <returns></returns>
        public static bool ByteToBool(byte dbItem, int startIndex)
        {
            int startPos = 0;
            switch (startIndex)
            {
                case 0:
                    startPos = 7;
                    break;
                case 1:
                    startPos = 6;
                    break;
                case 2:
                    startPos = 5;
                    break;
                case 3:
                    startPos = 4;
                    break;
                case 4:
                    startPos = 3;
                    break;
                case 5:
                    startPos = 2;
                    break;
                case 6:
                    startPos = 1;
                    break;
                case 7:
                    startPos = 0;
                    break;
                default:
                    startPos = -1;
                    break;
            }
            return Convert.ToString(dbItem, 2)//转换成二进制
            .PadLeft(8, '0')//字符串长度为8位，不够左边补零
            .Substring(startPos, 1) == "0" ? false : true;
        }
    }
}