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

namespace CrossProduct.Core
{
    /// <summary>
    /// the binary encoder class
    /// </summary>
    public class BinaryEncoder
    {
        /// <summary>
        /// Binaries to string.
        /// </summary>
        /// <param name="BinaryConvert">The binary convert.</param>
        /// <returns></returns>
        public static string BinaryToString(byte[] BinaryConvert)
        {
            return BinaryToString(BinaryConvert, BinaryConvert.Length);
        }

        /// <summary>
        /// Binaries to string.
        /// </summary>
        /// <param name="BinaryConvert">The binary convert.</param>
        /// <param name="lConvertLength">Length of the l convert.</param>
        /// <returns></returns>
        public static string BinaryToString(byte[] BinaryConvert, int lConvertLength)
        {
            if (BinaryConvert == null)
                return "";

            int nIndex;
            StringBuilder buildString = new StringBuilder(lConvertLength * 2);

            for (nIndex = 0; nIndex < lConvertLength; nIndex++)
            {
                buildString.AppendFormat("{0:X2}", BinaryConvert[nIndex]);
            }

            return buildString.ToString();
        }

        /// <summary>
        /// Strings to binary.
        /// </summary>
        /// <param name="BinaryConvert">The binary convert.</param>
        /// <param name="bAssumeString">if set to <c>true</c> [b assume string].</param>
        /// <returns></returns>
        public static byte[] StringToBinary(string BinaryConvert, bool bAssumeString)
        {
            if (BinaryConvert == null || BinaryConvert == "")
                return new byte[0];

            int nLength = BinaryConvert.Length / 2;

            if (bAssumeString)
            {
                if (BinaryConvert.Substring(BinaryConvert.Length - 2, 2) == "00")
                    nLength--;
            }

            int nIndex;
            int nPos;
            byte[] ReturnArray = new byte[nLength];

            for (nPos = 0, nIndex = 0; nPos < nLength; nIndex += 2, nPos++)
            {
                ReturnArray[nPos] = byte.Parse(BinaryConvert.Substring(nIndex, 2), System.Globalization.NumberStyles.HexNumber);
            }

            return ReturnArray;
        }

        /// <summary>
        /// Strings to binary.
        /// </summary>
        /// <param name="BinaryConvert">The binary convert.</param>
        /// <returns></returns>
        public static byte[] StringToBinary(string BinaryConvert)
        {
            return StringToBinary(BinaryConvert, true);
        }
    }
}