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

namespace learun.util
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.09.18
	/// 描 述：字符串工具方法
	/// </summary>
	public static class Str
	{
		#region Empty(空字符串)

		/// <summary>
		/// 空字符串
		/// </summary>
		public static string Empty
		{
			get { return string.Empty; }
		}

		#endregion Empty(空字符串)

		#region PinYin(获取汉字的拼音简码)

		/// <summary>
		/// 获取汉字的拼音简码，即首字母缩写,范例：中国,返回zg
		/// </summary>
		/// <param name="chineseText">汉字文本,范例： 中国</param>
		public static string PinYin(string chineseText)
		{
			if (string.IsNullOrWhiteSpace(chineseText))
				return string.Empty;
			var result = new StringBuilder();
			foreach (char text in chineseText)
				result.AppendFormat("{0}", ResolvePinYin(text));
			return result.ToString().ToLower();
		}

		/// <summary>
		/// 解析单个汉字的拼音简码
		/// </summary>
		/// <param name="text">单个汉字</param>
		private static string ResolvePinYin(char text)
		{
			byte[] charBytes = Encoding.Default.GetBytes(text.ToString());
			if (charBytes[0] <= 127)
				return text.ToString();
			var unicode = (ushort)(charBytes[0] * 256 + charBytes[1]);
			string pinYin = ResolvePinYinByCode(unicode);
			if (!string.IsNullOrWhiteSpace(pinYin))
				return pinYin;
			return ResolvePinYinByFile(text.ToString());
		}

		/// <summary>
		/// 使用字符编码方式获取拼音简码
		/// </summary>
		private static string ResolvePinYinByCode(ushort unicode)
		{
			if (unicode >= '\uB0A1' && unicode <= '\uB0C4')
				return "A";
			if (unicode >= '\uB0C5' && unicode <= '\uB2C0' && unicode != 45464)
				return "B";
			if (unicode >= '\uB2C1' && unicode <= '\uB4ED')
				return "C";
			if (unicode >= '\uB4EE' && unicode <= '\uB6E9')
				return "D";
			if (unicode >= '\uB6EA' && unicode <= '\uB7A1')
				return "E";
			if (unicode >= '\uB7A2' && unicode <= '\uB8C0')
				return "F";
			if (unicode >= '\uB8C1' && unicode <= '\uB9FD')
				return "G";
			if (unicode >= '\uB9FE' && unicode <= '\uBBF6')
				return "H";
			if (unicode >= '\uBBF7' && unicode <= '\uBFA5')
				return "J";
			if (unicode >= '\uBFA6' && unicode <= '\uC0AB')
				return "K";
			if (unicode >= '\uC0AC' && unicode <= '\uC2E7')
				return "L";
			if (unicode >= '\uC2E8' && unicode <= '\uC4C2')
				return "M";
			if (unicode >= '\uC4C3' && unicode <= '\uC5B5')
				return "N";
			if (unicode >= '\uC5B6' && unicode <= '\uC5BD')
				return "O";
			if (unicode >= '\uC5BE' && unicode <= '\uC6D9')
				return "P";
			if (unicode >= '\uC6DA' && unicode <= '\uC8BA')
				return "Q";
			if (unicode >= '\uC8BB' && unicode <= '\uC8F5')
				return "R";
			if (unicode >= '\uC8F6' && unicode <= '\uCBF9')
				return "S";
			if (unicode >= '\uCBFA' && unicode <= '\uCDD9')
				return "T";
			if (unicode >= '\uCDDA' && unicode <= '\uCEF3')
				return "W";
			if (unicode >= '\uCEF4' && unicode <= '\uD188')
				return "X";
			if (unicode >= '\uD1B9' && unicode <= '\uD4D0')
				return "Y";
			if (unicode >= '\uD4D1' && unicode <= '\uD7F9')
				return "Z";
			return string.Empty;
		}

		/// <summary>
		/// 从拼音简码文件获取
		/// </summary>
		/// <param name="text">单个汉字</param>
		public static string ResolvePinYinByFile(string text)
		{
			int index = Const.ChinesePinYin.IndexOf(text, StringComparison.Ordinal);
			if (index < 0)
				return string.Empty;
			return Const.ChinesePinYin.Substring(index + 1, 1);
		}

		#endregion PinYin(获取汉字的拼音简码)

		#region 获取全拼

		/// <summary>
		/// 把汉字转换成拼音(全拼)
		/// </summary>
		/// <param name="text">汉字字符串</param>
		/// <returns>转换后的拼音(全拼)字符串</returns>
		public static string ConvertPinYin(string text)
		{
			// 匹配中文字符
			Regex regex = new Regex("^[\u4e00-\u9fa5]$");
			byte[] array = new byte[2];
			string pyString = "";
			int chrAsc = 0;
			int i1 = 0;
			int i2 = 0;
			char[] noWChar = text.ToCharArray();

			for (int j = 0; j < noWChar.Length; j++)
			{
				// 中文字符
				if (regex.IsMatch(noWChar[j].ToString()))
				{
					array = System.Text.Encoding.Default.GetBytes(noWChar[j].ToString());
					i1 = (short)(array[0]);
					i2 = (short)(array[1]);
					chrAsc = i1 * 256 + i2 - 65536;
					if (chrAsc > 0 && chrAsc < 160)
					{
						pyString += noWChar[j];
					}
					else
					{
						// 修正部分文字
						if (chrAsc == -9254)  // 修正“圳”字
							pyString += "Zhen";
						else
						{
							for (int i = (ChinesePinYinValue.Length - 1); i >= 0; i--)
							{
								if (ChinesePinYinValue[i] <= chrAsc)
								{
									pyString += ChinesePinYinName[i];
									break;
								}
							}
						}
					}
				}
				// 非中文字符
				else
				{
					pyString += noWChar[j].ToString();
				}
			}
			return pyString;
		}

		/// <summary>
		/// 拼音码
		/// </summary>
		private static int[] ChinesePinYinValue = new int[]
		{
		-20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036,
		-20032,-20026,-20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763,
		-19756,-19751,-19746,-19741,-19739,-19728,-19725,-19715,-19540,-19531,-19525,-19515,
		-19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,-19261,-19249,
		-19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006,
		-19003,-18996,-18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735,
		-18731,-18722,-18710,-18697,-18696,-18526,-18518,-18501,-18490,-18478,-18463,-18448,
		-18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183, -18181,-18012,
		-17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752,
		-17733,-17730,-17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482,
		-17468,-17454,-17433,-17427,-17417,-17202,-17185,-16983,-16970,-16942,-16915,-16733,
		-16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,-16452,-16448,
		-16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216,
		-16212,-16205,-16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944,
		-15933,-15920,-15915,-15903,-15889,-15878,-15707,-15701,-15681,-15667,-15661,-15659,
		-15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,-15408,-15394,
		-15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150,
		-15149,-15144,-15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109,
		-14941,-14937,-14933,-14930,-14929,-14928,-14926,-14922,-14921,-14914,-14908,-14902,
		-14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,-14663,-14654,
		-14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345,
		-14170,-14159,-14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112,
		-14109,-14099,-14097,-14094,-14092,-14090,-14087,-14083,-13917,-13914,-13910,-13907,
		-13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,-13611,-13601,
		-13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343,
		-13340,-13329,-13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076,
		-13068,-13063,-13060,-12888,-12875,-12871,-12860,-12858,-12852,-12849,-12838,-12831,
		-12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,-12320,-12300,
		-12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798,
		-11781,-11604,-11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067,
		-11055,-11052,-11045,-11041,-11038,-11024,-11020,-11019,-11018,-11014,-10838,-10832,
		-10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,-10329,-10328,
		-10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254
		};

		/// <summary>
		///  拼音码
		/// </summary>
		private static string[] ChinesePinYinName = new string[]
		{
		"A","Ai","An","Ang","Ao","Ba","Bai","Ban","Bang","Bao","Bei","Ben",
		"Beng","Bi","Bian","Biao","Bie","Bin","Bing","Bo","Bu","Ba","Cai","Can",
		"Cang","Cao","Ce","Ceng","Cha","Chai","Chan","Chang","Chao","Che","Chen","Cheng",
		"Chi","Chong","Chou","Chu","Chuai","Chuan","Chuang","Chui","Chun","Chuo","Ci","Cong",
		"Cou","Cu","Cuan","Cui","Cun","Cuo","Da","Dai","Dan","Dang","Dao","De",
		"Deng","Di","Dian","Diao","Die","Ding","Diu","Dong","Dou","Du","Duan","Dui",
		"Dun","Duo","E","En","Er","Fa","Fan","Fang","Fei","Fen","Feng","Fo",
		"Fou","Fu","Ga","Gai","Gan","Gang","Gao","Ge","Gei","Gen","Geng","Gong",
		"Gou","Gu","Gua","Guai","Guan","Guang","Gui","Gun","Guo","Ha","Hai","Han",
		"Hang","Hao","He","Hei","Hen","Heng","Hong","Hou","Hu","Hua","Huai","Huan",
		"Huang","Hui","Hun","Huo","Ji","Jia","Jian","Jiang","Jiao","Jie","Jin","Jing",
		"Jiong","Jiu","Ju","Juan","Jue","Jun","Ka","Kai","Kan","Kang","Kao","Ke",
		"Ken","Keng","Kong","Kou","Ku","Kua","Kuai","Kuan","Kuang","Kui","Kun","Kuo",
		"La","Lai","Lan","Lang","Lao","Le","Lei","Leng","Li","Lia","Lian","Liang",
		"Liao","Lie","Lin","Ling","Liu","Long","Lou","Lu","Lv","Luan","Lue","Lun",
		"Luo","Ma","Mai","Man","Mang","Mao","Me","Mei","Men","Meng","Mi","Mian",
		"Miao","Mie","Min","Ming","Miu","Mo","Mou","Mu","Na","Nai","Nan","Nang",
		"Nao","Ne","Nei","Nen","Neng","Ni","Nian","Niang","Niao","Nie","Nin","Ning",
		"Niu","Nong","Nu","Nv","Nuan","Nue","Nuo","O","Ou","Pa","Pai","Pan",
		"Pang","Pao","Pei","Pen","Peng","Pi","Pian","Piao","Pie","Pin","Ping","Po",
		"Pu","Qi","Qia","Qian","Qiang","Qiao","Qie","Qin","Qing","Qiong","Qiu","Qu",
		"Quan","Que","Qun","Ran","Rang","Rao","Re","Ren","Reng","Ri","Rong","Rou",
		"Ru","Ruan","Rui","Run","Ruo","Sa","Sai","San","Sang","Sao","Se","Sen",
		"Seng","Sha","Shai","Shan","Shang","Shao","She","Shen","Sheng","Shi","Shou","Shu",
		"Shua","Shuai","Shuan","Shuang","Shui","Shun","Shuo","Si","Song","Sou","Su","Suan",
		"Sui","Sun","Suo","Ta","Tai","Tan","Tang","Tao","Te","Teng","Ti","Tian",
		"Tiao","Tie","Ting","Tong","Tou","Tu","Tuan","Tui","Tun","Tuo","Wa","Wai",
		"Wan","Wang","Wei","Wen","Weng","Wo","Wu","Xi","Xia","Xian","Xiang","Xiao",
		"Xie","Xin","Xing","Xiong","Xiu","Xu","Xuan","Xue","Xun","Ya","Yan","Yang",
		"Yao","Ye","Yi","Yin","Ying","Yo","Yong","You","Yu","Yuan","Yue","Yun",
		"Za", "Zai","Zan","Zang","Zao","Ze","Zei","Zen","Zeng","Zha","Zhai","Zhan",
		"Zhang","Zhao","Zhe","Zhen","Zheng","Zhi","Zhong","Zhou","Zhu","Zhua","Zhuai","Zhuan",
		"Zhuang","Zhui","Zhun","Zhuo","Zi","Zong","Zou","Zu","Zuan","Zui","Zun","Zuo"
		};

		#endregion 获取全拼

		#region Splice(拼接集合元素)

		/// <summary>
		/// 拼接集合元素
		/// </summary>
		/// <typeparam name="T">集合元素类型</typeparam>
		/// <param name="list">集合</param>
		/// <param name="quotes">引号，默认不带引号，范例：单引号 "'"</param>
		/// <param name="separator">分隔符，默认使用逗号分隔</param>
		public static string Splice<T>(IEnumerable<T> list, string quotes = "", string separator = ",")
		{
			if (list == null)
				return string.Empty;
			var result = new StringBuilder();
			foreach (var each in list)
				result.AppendFormat("{0}{1}{0}{2}", quotes, each, separator);
			return result.ToString().TrimEnd(separator.ToCharArray());
		}

		#endregion Splice(拼接集合元素)

		#region FirstUpper(将值的首字母大（小）写)

		/// <summary>
		/// 将值的首字母大写
		/// </summary>
		/// <param name="value">值</param>
		public static string FirstUpper(string value)
		{
			string firstChar = value.Substring(0, 1).ToUpper();
			return firstChar + value.Substring(1, value.Length - 1);
		}

		/// <summary>
		/// 将值的首字母小写
		/// </summary>
		/// <param name="value">值</param>
		/// <returns></returns>
		public static string FirstLower(string value)
		{
			string firstChar = value.Substring(0, 1).ToLower();
			return firstChar + value.Substring(1, value.Length - 1);
		}

		#endregion FirstUpper(将值的首字母大（小）写)

		#region ToCamel(将字符串转成驼峰形式)

		/// <summary>
		/// 将字符串转成驼峰形式
		/// </summary>
		/// <param name="value">原始字符串</param>
		public static string ToCamel(string value)
		{
			return FirstUpper(value.ToLower());
		}

		#endregion ToCamel(将字符串转成驼峰形式)

		#region ContainsChinese(是否包含中文)

		/// <summary>
		/// 是否包含中文
		/// </summary>
		/// <param name="text">文本</param>
		public static bool ContainsChinese(string text)
		{
			const string pattern = "[\u4e00-\u9fa5]+";
			return Regex.IsMatch(text, pattern);
		}

		#endregion ContainsChinese(是否包含中文)

		#region ContainsNumber(是否包含数字)

		/// <summary>
		/// 是否包含数字
		/// </summary>
		/// <param name="text">文本</param>
		public static bool ContainsNumber(string text)
		{
			const string pattern = "[0-9]+";
			return Regex.IsMatch(text, pattern);
		}

		#endregion ContainsNumber(是否包含数字)

		#region Distinct(去除重复)

		/// <summary>
		/// 去除重复
		/// </summary>
		/// <param name="value">值，范例1："5555",返回"5",范例2："4545",返回"45"</param>
		public static string Distinct(string value)
		{
			var array = value.ToCharArray();
			return new string(array.Distinct().ToArray());
		}

		#endregion Distinct(去除重复)

		#region Truncate(截断字符串)

		/// <summary>
		/// 截断字符串
		/// </summary>
		/// <param name="text">文本</param>
		/// <param name="length">返回长度</param>
		/// <param name="endCharCount">添加结束符号的个数，默认0，不添加</param>
		/// <param name="endChar">结束符号，默认为省略号</param>
		public static string Truncate(string text, int length, int endCharCount = 0, string endChar = ".")
		{
			if (string.IsNullOrWhiteSpace(text))
				return string.Empty;
			if (text.Length < length)
				return text;
			return text.Substring(0, length) + GetEndString(endCharCount, endChar);
		}

		/// <summary>
		/// 获取结束字符串
		/// </summary>
		private static string GetEndString(int endCharCount, string endChar)
		{
			StringBuilder result = new StringBuilder();
			for (int i = 0; i < endCharCount; i++)
				result.Append(endChar);
			return result.ToString();
		}

		#endregion Truncate(截断字符串)

		#region Unique(获取全局唯一值)

		/// <summary>
		/// 获取全局唯一值
		/// </summary>
		public static string Unique()
		{
			return Guid.NewGuid().ToString().Replace("-", "");
		}

		#endregion Unique(获取全局唯一值)

		#region GetLastProperty(获取最后一个属性)

		/// <summary>
		/// 获取最后一个属性
		/// </summary>
		/// <param name="propertyName">属性名，范例，A.B.C,返回"C"</param>
		public static string GetLastProperty(string propertyName)
		{
			if (propertyName.IsEmpty())
				return string.Empty;
			var lastIndex = propertyName.LastIndexOf(".", StringComparison.Ordinal) + 1;
			return propertyName.Substring(lastIndex);
		}

		#endregion GetLastProperty(获取最后一个属性)

		/// <summary>
		/// 过滤sql语句，但允许查询
		/// </summary>
		/// <param name="source"></param>
		/// <returns></returns>
		public static string SqlFilters(string source)
		{
			//半角括号替换为全角括号
			source = source.Replace("'", "'''");
			//去除执行SQL语句的命令关键字
			//source = Regex.Replace(source, "select", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "insert", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "update", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "delete", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "drop", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "truncate", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "declare", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "xp_cmdshell", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "/add", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "net user", "", RegexOptions.IgnoreCase);
			//去除执行存储过程的命令关键字
			source = Regex.Replace(source, "exec", "", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "execute", "", RegexOptions.IgnoreCase);
			//去除系统存储过程或扩展存储过程关键字
			source = Regex.Replace(source, "xp_", "x p_", RegexOptions.IgnoreCase);
			source = Regex.Replace(source, "sp_", "s p_", RegexOptions.IgnoreCase);
			//防止16进制注入
			source = Regex.Replace(source, "0x", "0 x", RegexOptions.IgnoreCase);
			return source;
		}
	}
}