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

namespace Myshipping.Core.Extension
{
    public static class NumberToUpper
    {
		/// <summary>  
		/// 单个数字转为大写  
		/// </summary>  
		/// <param name="c">小写阿拉伯数字 0---9</param>  
		/// <returns>大写数字</returns>  
		private static string getint(char c)
		{
			string str = "";
			switch (c)
			{
				case '0':
					str = "零";
					break;
				case '1':
					str = "壹";
					break;
				case '2':
					str = "贰";
					break;
				case '3':
					str = "叁";
					break;
				case '4':
					str = "肆";
					break;
				case '5':
					str = "伍";
					break;
				case '6':
					str = "陆";
					break;
				case '7':
					str = "柒";
					break;
				case '8':
					str = "拐";
					break;
				case '9':
					str = "玖";
					break;
			}
			return str;
		}

		/// <summary>  
		/// 把一个单元转为大写，如亿单元，万单元，个单元  
		/// </summary>  
		/// <param name="str">这个单元的小写数字（4位长，若不足，则前面补零）</param>  
		/// <param name="strDW">亿，万，元</param>  
		/// <returns>转换结果</returns>  
		private static string getupper(string str, string strDW)
		{
			if (str == "0000")
				return "";
			string ret = "";
			string tmp1 =  getint(str[0]);
			string tmp2 =  getint(str[1]);
			string tmp3 =  getint(str[2]);
			string tmp4 =  getint(str[3]);
			if (tmp1 != "零")
			{
				ret = ret + tmp1 + "仟";
			}
			else
			{
				ret = ret + tmp1;
			}
			if (tmp2 != "零")
			{
				ret = ret + tmp2 + "佰";
			}
			else
			{
				if (tmp1 != "零")                                            //保证若有两个零'00'，结果只有一个零，下同  
					ret = ret + tmp2;
			}
			if (tmp3 != "零")
			{
				ret = ret + tmp3 + "拾";
			}
			else
			{
				if (tmp2 != "零")
					ret = ret + tmp3;
			}
			if (tmp4 != "零")
			{
				ret = ret + tmp4;
			}
			if (ret[0] == '零')                                              //若第一个字符是'零'，则去掉  
				ret = ret.Substring(1);
			if (ret[ret.Length - 1] == '零')                             //若最后一个字符是'零'，则去掉  
				ret = ret.Substring(0, ret.Length - 1);
			return ret + strDW;                                             //加上本单元的单位  

		}

		/// <summary>
		/// 数字转换成大写
		/// </summary>
		/// <param name="d"></param>
		/// <returns></returns>
		public static string ToUpper(dynamic d)
		{
			if (d == 0)
				return "零";

			string je = d.ToString("####.00");
			if (je.Length > 15)
				return "";
			je = new String('0', 15 - je.Length) + je;   //若小于15位长，前面补0  

			string stry = je.Substring(0, 4);                                //取得'亿'单元  
			string strw = je.Substring(4, 4);                                //取得'万'单元  
			string strg = je.Substring(8, 4);                                //取得'元'单元  
			string strf = je.Substring(13, 2);                               //取得小数部分  
			string str1 = "", str2 = "", str3 = "";
			str1 =  getupper(stry, "亿");                             //亿单元的大写  
			str2 =  getupper(strw, "万");                             //万单元的大写  
			str3 =  getupper(strg, " ");                             //元单元的大写              
			string str_y = "", str_w = "";
			if (je[3] == '0' || je[4] == '0')                               //亿和万之间是否有0  
				str_y = "零";
			if (je[7] == '0' || je[8] == '0')                               //万和元之间是否有0  
				str_w = "零";
			string ret = str1 + str_y + str2 + str_w + str3;                //亿，万，元的三个大写合并  
			for (int i = 0; i < ret.Length; i++)                              //去掉前面的"零"            
			{
				if (ret[i] != '零')
				{
					ret = ret.Substring(i);
					break;
				}
			}
			for (int i = ret.Length - 1; i > -1; i--)                     //去掉最后的"零"    
			{
				if (ret[i] != '零')
				{
					ret = ret.Substring(0, i + 1);
					break;
				}
			}
			if (ret[ret.Length - 1] != ' ')                                //若最后不位不是'元'，则加一个'元'字  
				ret = ret + "";
			if (ret == "零零")                                           //若为零元，则去掉"元数"，结果只要小数部分  
				ret = "";
			if (strf == "00")                                               //下面是小数部分的转换  
			{
				ret = ret + "整";
			}
			else
			{
				string tmp = "";
				tmp =  getint(strf[0]);
				if (tmp == "零")
					ret = ret + tmp;
				else
					ret = ret + tmp + "角";

				tmp =  getint(strf[1]);
				if (tmp == "零")
					ret = ret + "整";
				else
					ret = ret + tmp + "分";
			}
			if (ret[0] == '零')
			{
				ret = ret.Substring(1);                                     //防止0.03转为"零叁分"，而直接转为"叁分"  
			}
			return ret;                                                  //完成，返回  
		}
	}
}