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

namespace Datory.Tests.Utils
{
    public static class StringUtils
    {
        public static string GetCacheKey(string nameofClass, params string[] values)
        {
            var key = $"SS.Caching.{nameofClass}";
            if (values == null || values.Length <= 0) return key;
            return values.Aggregate(key, (current, t) => current + ("." + t));
        }

        public static string GetContentTableName(int siteId)
        {
            return $"siteserver_Content_{siteId}";
        }

        public static bool Equals(string s1, string s2)
        {
            return s1 == s2 || string.IsNullOrEmpty(s1) && string.IsNullOrEmpty(s2);
        }

        public static bool EqualsIgnoreCase(string s1, string s2)
        {
            if (string.IsNullOrEmpty(s1) && string.IsNullOrEmpty(s2))
                return true;
            if (string.IsNullOrEmpty(s1) || string.IsNullOrEmpty(s2) || s2.Length != s1.Length)
                return false;
            return string.Compare(s1, 0, s2, 0, s2.Length, StringComparison.OrdinalIgnoreCase) == 0;
        }

        public static bool EndsWith(string s, char c)
        {
            int length = s.Length;
            if (length != 0)
                return (int)s[length - 1] == (int)c;
            return false;
        }

        public static bool EndsWithIgnoreCase(string s1, string s2)
        {
            int indexA = s1.Length - s2.Length;
            if (indexA < 0)
                return false;
            return string.Compare(s1, indexA, s2, 0, s2.Length, StringComparison.OrdinalIgnoreCase) == 0;
        }

        public static bool StartsWith(string s, char c)
        {
            if (s.Length != 0)
                return (int)s[0] == (int)c;
            return false;
        }

        public static bool StartsWithIgnoreCase(string s1, string s2)
        {
            if (string.IsNullOrEmpty(s1) || string.IsNullOrEmpty(s2) || s2.Length > s1.Length)
                return false;
            return string.Compare(s1, 0, s2, 0, s2.Length, StringComparison.OrdinalIgnoreCase) == 0;
        }

        public static bool ArrayEquals(string[] a, string[] b)
        {
            if (a == null != (b == null))
                return false;
            if (a == null)
                return true;
            int length = a.Length;
            if (length != b.Length)
                return false;
            for (int index = 0; index < length; ++index)
            {
                if (a[index] != b[index])
                    return false;
            }
            return true;
        }


        public static string[] ObjectArrayToStringArray(object[] objectArray)
        {
            string[] strArray = new string[objectArray.Length];
            objectArray.CopyTo((Array)strArray, 0);
            return strArray;
        }

        //------------------------------//

        public static bool IsMobile(string val)
        {
            return Regex.IsMatch(val, @"^1\d{10}$", RegexOptions.IgnoreCase);
        }

        public static bool IsEmail(string val)
        {
            return Regex.IsMatch(val, @"^\w+([-_+.]\w+)*@\w+([-_.]\w+)*\.\w+([-_.]\w+)*$", RegexOptions.IgnoreCase);
        }

        public static bool IsNumber(string val)
        {
            const string formatNumber = "^[0-9]+$";
            return Regex.IsMatch(val, formatNumber);
        }

        public static bool IsDateTime(string val)
        {
            const string formatDate = @"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$";
            const string formatDateTime = @"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-)) (20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d$";

            return Regex.IsMatch(val, formatDate) || Regex.IsMatch(val, formatDateTime);
        }

        public static bool In(string strCollection, int inInt)
        {
            return In(strCollection, inInt.ToString());
        }

        public static bool In(string strCollection, string inStr)
        {
            if (string.IsNullOrEmpty(strCollection)) return false;
            return strCollection == inStr || strCollection.StartsWith(inStr + ",") || strCollection.EndsWith("," + inStr) || strCollection.IndexOf("," + inStr + ",", StringComparison.Ordinal) != -1;
        }

        public static bool Contains(string text, string inner)
        {
            return text?.IndexOf(inner, StringComparison.Ordinal) >= 0;
        }

        public static bool ContainsIgnoreCase(string text, string inner)
        {
            if (string.IsNullOrEmpty(text) || string.IsNullOrEmpty(inner)) return false;
            return text.ToLower().IndexOf(inner.ToLower(), StringComparison.Ordinal) >= 0;
        }

        public static bool ContainsIgnoreCase(IList<string> list, string target)
        {
            if (list == null || list.Count == 0) return false;

            return list.Any(element => EqualsIgnoreCase(element, target));
        }

        public static string Trim(string text)
        {
            return string.IsNullOrEmpty(text) ? string.Empty : text.Trim();
        }

        public static string TrimSlash(string text)
        {
            return string.IsNullOrEmpty(text) ? string.Empty : text.Trim().Trim('/');
        }

        public static string TrimAndToLower(string text)
        {
            return string.IsNullOrEmpty(text) ? string.Empty : text.ToLower().Trim();
        }

        public static string Remove(string text, int startIndex)
        {
            if (string.IsNullOrEmpty(text)) return string.Empty;
            if (startIndex < 0)
            {
                throw new ArgumentOutOfRangeException(nameof(startIndex));
            }
            if (startIndex >= text.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(startIndex));
            }
            return text.Substring(0, startIndex);
        }

        public static string GetGuid()
        {
            return Guid.NewGuid().ToString();
        }

        public static string GetShortGuid()
        {
            long i = 1;
            foreach (var b in System.Guid.NewGuid().ToByteArray())
            {
                i *= b + 1;
            }
            return $"{i - DateTime.Now.Ticks:x}";
        }

        public static string GetShortGuid(bool isUppercase)
        {
            long i = 1;
            foreach (var b in System.Guid.NewGuid().ToByteArray())
            {
                i *= b + 1;
            }
            string retval = $"{i - DateTime.Now.Ticks:x}";
            return isUppercase ? retval.ToUpper() : retval.ToLower();
        }

        public static bool EqualsIgnoreNull(string a, string b)
        {
            return string.IsNullOrEmpty(a) ? string.IsNullOrEmpty(b) : string.Equals(a, b);
        }

        public static bool StartsWith(string text, string startString)
        {
            if (string.IsNullOrEmpty(text) || string.IsNullOrEmpty(startString)) return false;
            return text.StartsWith(startString);
        }

        public static bool EndsWith(string text, string endString)
        {
            if (string.IsNullOrEmpty(text) || string.IsNullOrEmpty(endString)) return false;
            return text.EndsWith(endString);
        }

        public static void InsertBefore(string[] insertBeforeArray, StringBuilder contentBuilder, string insertContent)
        {
            if (contentBuilder == null) return;
            foreach (var insertBefore in insertBeforeArray)
            {
                if (contentBuilder.ToString().IndexOf(insertBefore, StringComparison.Ordinal) != -1)
                {
                    InsertBefore(insertBefore, contentBuilder, insertContent);
                    return;
                }
            }
        }

        private static void InsertBefore(string insertBefore, StringBuilder contentBuilder, string insertContent)
        {
            if (string.IsNullOrEmpty(insertBefore) || contentBuilder == null) return;
            var startIndex = contentBuilder.ToString().IndexOf(insertBefore, StringComparison.Ordinal);
            if (startIndex != -1)
            {
                contentBuilder.Insert(startIndex, insertContent);
            }
        }

        public static void InsertAfter(string[] insertAfterArray, StringBuilder contentBuilder, string insertContent)
        {
            if (contentBuilder != null)
            {
                foreach (var insertAfter in insertAfterArray)
                {
                    if (contentBuilder.ToString().IndexOf(insertAfter, StringComparison.Ordinal) != -1)
                    {
                        InsertAfter(insertAfter, contentBuilder, insertContent);
                        return;
                    }
                }
            }
        }

        private static void InsertAfter(string insertAfter, StringBuilder contentBuilder, string insertContent)
        {
            if (string.IsNullOrEmpty(insertAfter) || contentBuilder == null) return;
            var startIndex = contentBuilder.ToString().IndexOf(insertAfter, StringComparison.Ordinal);
            if (startIndex == -1) return;
            if (startIndex != -1)
            {
                contentBuilder.Insert(startIndex + insertAfter.Length, insertContent);
            }
        }

        public static string HtmlDecode(string inputString)
        {
            return HttpUtility.HtmlDecode(inputString);
        }

        public static string HtmlEncode(string inputString)
        {
            return HttpUtility.HtmlEncode(inputString);
        }

        public static string ToXmlContent(string inputString)
        {
            var contentBuilder = new StringBuilder(inputString);
            contentBuilder.Replace("<![CDATA[", string.Empty);
            contentBuilder.Replace("]]>", string.Empty);
            contentBuilder.Insert(0, "<![CDATA[");
            contentBuilder.Append("]]>");
            return contentBuilder.ToString();
        }

        public static string ReplaceIgnoreCase(string original, string pattern, string replacement)
        {
            if (original == null) return string.Empty;
            if (replacement == null) replacement = string.Empty;
            var count = 0;
            var position0 = 0;
            int position1;
            var upperString = original.ToUpper();
            var upperPattern = pattern.ToUpper();
            var inc = (original.Length / pattern.Length) * (replacement.Length - pattern.Length);
            var chars = new char[original.Length + Math.Max(0, inc)];
            while ((position1 = upperString.IndexOf(upperPattern, position0, StringComparison.Ordinal)) != -1)
            {
                for (var i = position0; i < position1; ++i) chars[count++] = original[i];
                foreach (var t in replacement)
                {
                    chars[count++] = t;
                }
                position0 = position1 + pattern.Length;
            }
            if (position0 == 0) return original;
            for (var i = position0; i < original.Length; ++i) chars[count++] = original[i];
            return new string(chars, 0, count);
        }

        public static string Replace(string replace, string input, string to)
        {
            var retval = RegexUtils.Replace(replace, input, to);
            if (string.IsNullOrEmpty(replace)) return retval;
            if (replace.StartsWith("/") && replace.EndsWith("/"))
            {
                retval = RegexUtils.Replace(replace.Trim('/'), input, to);
            }
            else
            {
                retval = input.Replace(replace, to);
            }
            return retval;
        }

        public static void ReplaceHrefOrSrc(StringBuilder builder, string replace, string to)
        {
            builder.Replace("href=\"" + replace, "href=\"" + to);
            builder.Replace("href='" + replace, "href='" + to);
            builder.Replace("href=" + replace, "href=" + to);
            builder.Replace("href=&quot;" + replace, "href=&quot;" + to);
            builder.Replace("src=\"" + replace, "src=\"" + to);
            builder.Replace("src='" + replace, "src='" + to);
            builder.Replace("src=" + replace, "src=" + to);
            builder.Replace("src=&quot;" + replace, "src=&quot;" + to);
        }

        public static string ReplaceFirst(string replace, string input, string to)
        {
            var pos = input.IndexOf(replace, StringComparison.Ordinal);
            if (pos > 0)
            {
                //取位置前部分+替换字符串+位置（加上查找字符长度）后部分
                return input.Substring(0, pos) + to + input.Substring(pos + replace.Length);
            }
            if (pos == 0)
            {
                return to + input.Substring(replace.Length);
            }
            return input;
        }

        public static string ReplaceStartsWith(string input, string replace, string to)
        {
            var retVal = input;
            if (!string.IsNullOrEmpty(input) && !string.IsNullOrEmpty(replace) && input.StartsWith(replace))
            {
                retVal = to + input.Substring(replace.Length);
            }
            return retVal;
        }

        public static string ReplaceStartsWithIgnoreCase(string input, string replace, string to)
        {
            var retVal = input;
            if (!string.IsNullOrEmpty(input) && !string.IsNullOrEmpty(replace) && input.ToLower().StartsWith(replace.ToLower()))
            {
                retVal = to + input.Substring(replace.Length);
            }
            return retVal;
        }

        public static string ReplaceEndsWith(string input, string replace, string to)
        {
            var retVal = input;
            if (!string.IsNullOrEmpty(input) && !string.IsNullOrEmpty(replace) && input.EndsWith(replace))
            {
                retVal = input.Substring(0, input.Length - replace.Length) + to;
            }
            return retVal;
        }

        public static string ReplaceEndsWithIgnoreCase(string input, string replace, string to)
        {
            var retVal = input;
            if (!string.IsNullOrEmpty(input) && !string.IsNullOrEmpty(replace) && input.ToLower().EndsWith(replace.ToLower()))
            {
                retVal = input.Substring(0, input.Length - replace.Length) + to;
            }
            return retVal;
        }

        public static string ReplaceNewlineToBr(string inputString)
        {
            if (string.IsNullOrEmpty(inputString)) return string.Empty;
            var retVal = new StringBuilder();
            inputString = inputString.Trim();
            foreach (var t in inputString)
            {
                switch (t)
                {
                    case '\n':
                        retVal.Append("<br />");
                        break;
                    case '\r':
                        break;
                    default:
                        retVal.Append(t);
                        break;
                }
            }
            return retVal.ToString();
        }

        public static string ReplaceNewline(string inputString, string replacement)
        {
            if (string.IsNullOrEmpty(inputString)) return string.Empty;
            var retVal = new StringBuilder();
            inputString = inputString.Trim();
            foreach (var t in inputString)
            {
                switch (t)
                {
                    case '\n':
                        retVal.Append(replacement);
                        break;
                    case '\r':
                        break;
                    default:
                        retVal.Append(t);
                        break;
                }
            }
            return retVal.ToString();
        }

        private static Encoding Gb2312 { get; } = Encoding.GetEncoding("gb2312");

        private static bool IsTwoBytesChar(char chr)
        {
            // 使用中文支持编码
            return Gb2312.GetByteCount(new[] { chr }) == 2;
        }

        /// <summary>
        /// 得到innerText在content中的数目
        /// </summary>
        /// <param name="innerText"></param>
        /// <param name="content"></param>
        /// <returns></returns>
        public static int GetCount(string innerText, string content)
        {
            if (innerText == null || content == null)
            {
                return 0;
            }
            var count = 0;
            for (var index = content.IndexOf(innerText, StringComparison.Ordinal); index != -1; index = content.IndexOf(innerText, index + innerText.Length, StringComparison.Ordinal))
            {
                count++;
            }
            return count;
        }

        public static int GetStartCount(char startChar, string content)
        {
            if (content == null)
            {
                return 0;
            }
            var count = 0;

            foreach (var theChar in content)
            {
                if (theChar == startChar)
                {
                    count++;
                }
                else
                {
                    break;
                }
            }
            return count;
        }

        public static int GetStartCount(string startString, string content)
        {
            if (content == null)
            {
                return 0;
            }
            var count = 0;

            while (true)
            {
                if (content.StartsWith(startString))
                {
                    count++;
                    content = content.Remove(0, startString.Length);
                }
                else
                {
                    break;
                }
            }

            return count;
        }

        public static string GetFirstOfStringCollection(string collection, char separator)
        {
            if (!string.IsNullOrEmpty(collection))
            {
                var index = collection.IndexOf(separator);
                return index == -1 ? collection : collection.Substring(0, index);
            }
            return string.Empty;
        }


        private static int _randomSeq;
        public static int GetRandomInt(int minValue, int maxValue)
        {
            var ro = new Random(unchecked((int)DateTime.Now.Ticks));
            var retval = ro.Next(minValue, maxValue);
            retval += _randomSeq++;
            if (retval >= maxValue)
            {
                _randomSeq = 0;
                retval = minValue;
            }
            return retval;
        }

        public static string ValueToUrl(string value)
        {
            var retval = string.Empty;
            if (!string.IsNullOrEmpty(value))
            {
                //替换url中的换行符，update by sessionliang at 20151211
                retval = value.Replace("=", "_equals_").Replace("&", "_and_").Replace("?", "_question_").Replace("'", "_quote_").Replace("+", "_add_").Replace("\r", "").Replace("\n", "");
            }
            return retval;
        }

        public static string ValueFromUrl(string value)
        {
            var retval = string.Empty;
            if (!string.IsNullOrEmpty(value))
            {
                retval = value.Replace("_equals_", "=").Replace("_and_", "&").Replace("_question_", "?").Replace("_quote_", "'").Replace("_add_", "+");
            }
            return retval;
        }

        public static string ToJsString(string value)
        {
            var retval = string.Empty;
            if (!string.IsNullOrEmpty(value))
            {
                retval = value.Replace("'", @"\'").Replace("\r", "\\r").Replace("\n", "\\n");
            }
            return retval;
        }

        public static string ParseReplace(string parsedContent, string replace, string to)
        {
            if (replace.IndexOf(',') != -1)
            {
                var replaceList = TranslateUtils.StringCollectionToStringList(replace);
                var toList = TranslateUtils.StringCollectionToStringList(to);

                if (replaceList.Count == toList.Count)
                {
                    for (var i = 0; i < replaceList.Count; i++)
                    {
                        parsedContent = parsedContent.Replace(replaceList[i], toList[i]);
                    }

                    return parsedContent;
                }

                if (toList.Count == 1)
                {
                    foreach (var replaceStr in replaceList)
                    {
                        parsedContent = parsedContent.Replace(replaceStr, to);
                    }

                    return parsedContent;
                }
            }

            string retval;
            if (replace.StartsWith("/") && replace.EndsWith("/"))
            {
                retval = RegexUtils.Replace(replace.Trim('/'), parsedContent, to);
            }
            else
            {
                retval = parsedContent.Replace(replace, to);
            }

            return retval;
        }

        public static string GetTrueImageHtml(string isDefaultStr)
        {
            return GetTrueImageHtml(TranslateUtils.ToBool(isDefaultStr));
        }

        private static string GetTrueImageHtml(bool isDefault)
        {
            var retval = string.Empty;
            if (isDefault)
            {
                retval = "<img src='../pic/icon/right.gif' border='0'/>";
            }
            return retval;
        }

        public static string LowerFirst(string input)
        {
            if (string.IsNullOrEmpty(input)) return string.Empty;
            return input.First().ToString().ToLower() + input.Substring(1);
        }
    }
}
