using System.Globalization;
using System.Text;

namespace Muchinfo.MTPClient.Service.Utilities
{
    public class ConveterHelper
    {
        /// <summary>
        /// 转换汉字为拼音声母
        /// </summary>
        /// <param name="word">要转换的字符串</param>
        /// <returns>拼音声母</returns>
        public static string GetPinYinFromChsWord(string word)
        {
            StringBuilder spellBuilder = new StringBuilder();
            word = word.Replace(" ", string.Empty).Replace("　", string.Empty);
            word = ToHalfAngle(word);
            //string shortname = "";
            //if (oWareName != null) shortname = GlobleFuction.ToDBC(oWareName.ToString().Trim().Replace(" ", "").Replace("　", ""));
            //string shortspell = "";
            for (int ic = 0; ic < word.Length; ic++)
            {
                spellBuilder.Append(GetPinYinFromChsWord(word[ic]));
            }
            return spellBuilder.ToString();
        }

        /// <summary>
        /// 转半角的函数(DBC case)
        /// </summary>
        /// <param name="input">任意字符串</param>
        /// <returns>半角字符串</returns>
        ///<remarks>
        ///全角空格为12288，半角空格为32
        ///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
        ///</remarks>
        public static string ToHalfAngle(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                c[i] = ToHalfAngle(c[i]);
                //if (c[i] == 12288)
                //{
                //    c[i] = (char)32;
                //    continue;
                //}
                //if (c[i] > 65280 && c[i] < 65375)
                //    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        private static char ToHalfAngle(char input)
        {
            if (input == 12288)
            {
                input = (char)32;
            }
            if (input > 65280 && input < 65375)
                input = (char)(input - 65248);

            return input;
        }

        private static char GetPinYinFromChsWord(char c)
        {
            if ((int)c >= 33 && (int)c <= 126)
                return c;
            Encoding encoding = System.Text.Encoding.GetEncoding("gb2312");
            if (encoding == null)
                encoding = System.Text.Encoding.Default;
            byte[] array = encoding.GetBytes(c.ToString(CultureInfo.InvariantCulture));
            if (array.Length > 1)
            {
                int i = (short)(array[0] - '\0') * 256 + ((short)(array[1] - '\0'));
                //if (i < 0xB0A1) return "_";
                if (i < 0xB0C5) return 'a';
                if (i < 0xB2C1) return 'b';
                if (i < 0xB4EE) return 'c';
                if (i < 0xB6EA) return 'd';
                if (i < 0xB7A2) return 'e';
                if (i < 0xB8C1) return 'f';
                if (i < 0xB9FE) return 'g';
                if (i < 0xBBF7) return 'h';
                if (i < 0xBFA6) return 'j';
                if (i < 0xC0AC) return 'k';
                if (i < 0xC2E8) return 'l';
                if (i < 0xC4C3) return 'm';
                if (i < 0xC5B6) return 'n';
                if (i < 0xC5BE) return 'o';
                if (i < 0xC6DA) return 'p';
                if (i < 0xC8BB) return 'q';
                if (i < 0xC8F6) return 'r';
                if (i < 0xCBFA) return 's';
                if (i < 0xCDDA) return 't';
                if (i < 0xCEF4) return 'w';
                if (i < 0xD1B9) return 'x';
                if (i < 0xD4D1) return 'y';
                if (i < 0xD7FA) return 'z';
            }
            return '*';
        }
    }
}