using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
using WIDESEA_Core.Const;
using WIDESEA_Core.Enums;

namespace WIDESEA_Core.Helper
{
    public static class UtilConvert
    {
        private static DateTime dateStart = new DateTime(1970, 1, 1, 8, 0, 0);

        private static long longTime = 621355968000000000;

        private static int samllTime = 10000000;
        /// <summary>
        /// 时间戳转换成日期
        /// </summary>
        /// <param name="timeStamp"></param>
        /// <returns></returns>
        public static DateTime GetTimeSpmpToDate(this object timeStamp)
        {
            if (timeStamp == null) return dateStart;
            DateTime dateTime = new DateTime(longTime + Convert.ToInt64(timeStamp) * samllTime, DateTimeKind.Utc).ToLocalTime();
            return dateTime;
        }

        public static string Serialize(this object obj, JsonSerializerSettings formatDate = null)
        {
            if (obj == null) return null;
            formatDate = formatDate ?? new JsonSerializerSettings
            {
                DateFormatString = "yyyy-MM-dd HH:mm:ss"
            };
            return JsonConvert.SerializeObject(obj, formatDate);
        }

        public static T DeserializeObject<T>(this string json)
        {
            if (string.IsNullOrEmpty(json))
            {
                return default(T);
            }
            if (json == "{}")
            {
                json = "[]";
            }
            return JsonConvert.DeserializeObject<T>(json);
        }

        public static string FirstLetterToLower(this string thisValue)
        {
            if (string.IsNullOrEmpty(thisValue)) return string.Empty;
            string result = thisValue.Substring(0, 1).ToLower() + thisValue.Substring(1, thisValue.Length - 1);
            return result;
        }

        public static string FirstLetterToUpper(this string thisValue)
        {
            if (string.IsNullOrEmpty(thisValue)) return string.Empty;
            string result = thisValue.Substring(0, 1).ToUpper() + thisValue.Substring(1, thisValue.Length - 1);
            return result;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static int ObjToInt(this object thisValue)
        {
            int reval = 0;
            if (thisValue == null) return 0;
            if (thisValue != DBNull.Value && int.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return reval;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static int DoubleToInt(this double thisValue)
        {
            int reval = 0;

            return Convert.ToInt32(thisValue);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <param name="errorValue"></param>
        /// <returns></returns>
        public static int ObjToInt(this object thisValue, int errorValue)
        {
            int reval = 0;
            if (thisValue != null && thisValue != DBNull.Value && int.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return errorValue;
        }

        public static long ObjToLong(this object thisValue)
        {
            long reval = 0;
            if (thisValue == null) return 0;
            if (thisValue != DBNull.Value && long.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return reval;
        }
        
        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static double ObjToMoney(this object thisValue)
        {
            double reval = 0;
            if (thisValue != null && thisValue != DBNull.Value && double.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return 0;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <param name="errorValue"></param>
        /// <returns></returns>
        public static double ObjToMoney(this object thisValue, double errorValue)
        {
            double reval = 0;
            if (thisValue != null && thisValue != DBNull.Value && double.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return errorValue;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static string ObjToString(this object thisValue)
        {
            if (thisValue != null) return thisValue.ToString().Trim();
            return "";
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static bool IsNotEmptyOrNull(this object thisValue)
        {
            return ObjToString(thisValue) != "" && ObjToString(thisValue) != "undefined" && ObjToString(thisValue) != "null";
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <param name="errorValue"></param>
        /// <returns></returns>
        public static string ObjToString(this object thisValue, string errorValue)
        {
            if (thisValue != null) return thisValue.ToString().Trim();
            return errorValue;
        }

        public static bool IsNullOrEmpty(this object thisValue) => thisValue == null || thisValue == DBNull.Value || string.IsNullOrWhiteSpace(thisValue.ToString());

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static Decimal ObjToDecimal(this object thisValue)
        {
            Decimal reval = 0;
            if (thisValue != null && thisValue != DBNull.Value && decimal.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return 0;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <param name="errorValue"></param>
        /// <returns></returns>
        public static Decimal ObjToDecimal(this object thisValue, decimal errorValue)
        {
            Decimal reval = 0;
            if (thisValue != null && thisValue != DBNull.Value && decimal.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return errorValue;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static DateTime ObjToDate(this object thisValue)
        {
            DateTime reval = DateTime.MinValue;
            if (thisValue != null && thisValue != DBNull.Value && DateTime.TryParse(thisValue.ToString(), out reval))
            {
                reval = Convert.ToDateTime(thisValue);
            }

            return reval;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <param name="errorValue"></param>
        /// <returns></returns>
        public static DateTime ObjToDate(this object thisValue, DateTime errorValue)
        {
            DateTime reval = DateTime.MinValue;
            if (thisValue != null && thisValue != DBNull.Value && DateTime.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return errorValue;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static bool ObjToBool(this object thisValue)
        {
            bool reval = false;
            if (thisValue != null && thisValue != DBNull.Value && bool.TryParse(thisValue.ToString(), out reval))
            {
                return reval;
            }

            return reval;
        }


        /// <summary>
        /// 获取当前时间的时间戳
        /// </summary>
        /// <param name="thisValue"></param>
        /// <returns></returns>
        public static string DateToTimeStamp(this DateTime thisValue)
        {
            TimeSpan ts = thisValue - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalSeconds).ToString();
        }

        public static object ChangeType(this object value, Type type)
        {
            if (value == null && type.IsGenericType) return Activator.CreateInstance(type);
            if (value == null) return null;
            if (type == value.GetType()) return value;
            if (type.IsEnum)
            {
                if (value is string)
                    return Enum.Parse(type, value as string);
                else
                    return Enum.ToObject(type, value);
            }

            if (!type.IsInterface && type.IsGenericType)
            {
                Type innerType = type.GetGenericArguments()[0];
                object innerValue = ChangeType(value, innerType);
                return Activator.CreateInstance(type, new object[] { innerValue });
            }

            if (value is string && type == typeof(Guid)) return new Guid(value as string);
            if (value is string && type == typeof(Version)) return new Version(value as string);
            if (!(value is IConvertible)) return value;
            return Convert.ChangeType(value, type);
        }

        public static object ChangeTypeList(this object value, Type type)
        {
            if (value == null) return default;

            var gt = typeof(List<>).MakeGenericType(type);
            dynamic lis = Activator.CreateInstance(gt);

            var addMethod = gt.GetMethod("Add");
            string values = value.ToString();
            if (values != null && values.StartsWith("(") && values.EndsWith(")"))
            {
                string[] splits;
                if (values.Contains("\",\""))
                {
                    splits = values.Remove(values.Length - 2, 2)
                        .Remove(0, 2)
                        .Split("\",\"");
                }
                else
                {
                    splits = values.Remove(0, 1)
                        .Remove(values.Length - 2, 1)
                        .Split(",");
                }

                foreach (var split in splits)
                {
                    var str = split;
                    if (split.StartsWith("\"") && split.EndsWith("\""))
                    {
                        str = split.Remove(0, 1)
                            .Remove(split.Length - 2, 1);
                    }

                    addMethod.Invoke(lis, new object[] { ChangeType(str, type) });
                }
            }

            return lis;
        }

        public static string ToJson(this object value)
        {
            return JsonConvert.SerializeObject(value);
        }

        public static bool IsInt(this object obj)
        {
            if (obj == null)
                return false;
            bool reslut = Int32.TryParse(obj.ToString(), out int _number);
            return reslut;

        }
        public static bool IsDate(this object str)
        {
            return str.IsDate(out _);
        }
        public static bool IsDate(this object str, out DateTime dateTime)
        {
            dateTime = DateTime.Now;
            if (str == null || str.ToString() == "")
            {
                return false;
            }
            return DateTime.TryParse(str.ToString(), out dateTime);
        }

        /// <summary>
        /// 根据传入格式判断是否为小数
        /// </summary>
        /// <param name="str"></param>
        /// <param name="formatString">18,5</param>
        /// <returns></returns>
        public static bool IsNumber(this string str, string formatString)
        {
            if (string.IsNullOrEmpty(str)) return false;

            return Regex.IsMatch(str, @"^[+-]?\d*[.]?\d*$");
        }

        public static bool IsGuid(this string guid)
        {
            Guid newId;
            return guid.GetGuid(out newId);
        }

        public static bool GetGuid(this string guid, out Guid outId)
        {
            Guid emptyId = Guid.Empty;
            return Guid.TryParse(guid, out outId);
        }

        /// <summary>
        /// 转换为短整型 qy 2024-7-15
        /// </summary>
        /// <param name="data">数据</param>
        public static short ToShort(this object data)
        {
            if (data == null)
                return 0;
            short result;
            var success = short.TryParse(data.ToString(), out result);
            if (success)
                return result;
            try
            {
                return Convert.ToInt16(data);
            }
            catch (Exception)
            {
                return 0;
            }
        }

        /// <summary>
        /// 转换为高精度浮点数,并按指定的小数位4舍5入 qy 2024-7-15
        /// </summary>
        /// <param name="data">数据</param>
        /// <param name="digits">小数位数</param>
        public static decimal ToDecimal(this object data, int digits)
        {
            return Math.Round(ObjToDecimal(data), digits);
        }

       

        /// <summary>
        /// 枚举转List qy 2024-7-15
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static List<object> GetEnumList<T>()
        {
            List<object> list = new List<object>();
            var t = typeof(T);
            foreach (var item in Enum.GetValues(typeof(T)))
            {
                FieldInfo f = t.GetField(Enum.GetName(typeof(T), item));
                var r = (System.ComponentModel.DescriptionAttribute[])f.GetCustomAttributes(typeof(System.ComponentModel.DescriptionAttribute), false);
                list.Add(new { ID = item, value = Enum.GetName(typeof(T), item), name = r[0].Description });
            }
            return list;
        }

        /// <summary> 
        /// 验证动态类型元素是否为空 qy 2024-7-15
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool CheckDynamic(object obj)
        {
            return (obj != null && Convert.ToString(obj) != "") ? true : false;
        }

        /// <summary>
        /// 动态类型元素转字符串并解码 qy 2024-7-15
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string DynamicToString(object obj)
        {
            return CheckDynamic(obj) ? HttpUtility.UrlDecode(Convert.ToString(obj).Trim()) : "";
        }

        /// <summary> 
        /// DataTable转为json  qy 2024-7-15
        /// </summary> 
        /// <param name="parObjRefDataTable">DataTable</param> 
        /// <returns>json数据</returns> 
        public static string ToJson(this DataTable parObjRefDataTable)
        {
            List<object> objArrList = new List<object>();

            foreach (DataRow objDataRow in parObjRefDataTable.Rows)
            {
                Dictionary<string, object> objResult = new Dictionary<string, object>();

                foreach (DataColumn objDataColumn in parObjRefDataTable.Columns)
                    objResult.Add(objDataColumn.ColumnName, objDataRow[objDataColumn].ToString());

                objArrList.Add(objResult);
            }

            return ToJson(objArrList);
        }
        /// <summary>
        /// Json转List qy 2024-7-15
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="parJson"></param>
        /// <returns></returns>
        public static List<T> JsonToList<T>(this string parJson)
        {
            if (string.IsNullOrWhiteSpace(parJson))
            {
                return new List<T>();
            }
            else
            {
                return JsonConvert.DeserializeObject<List<T>>(parJson);
            }
        }

        /// <summary>
        /// 日期转为unix值
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="utc">T:按UTC时间计算(默认);F:按本地时间计算</param>
        /// <returns></returns>
        public static double ToUnix(this DateTime dt, bool utc = true)
        {
            double intResult = 0;
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            intResult = (dt - startTime).TotalSeconds;
            intResult = Math.Round(intResult, 0);
            return intResult;
        }

        #region 判断是否为字符串 qy 2024-7-15
        /// <summary>
        /// 判断字符串是否为合法的json字符串 qy 2024-7-15
        /// </summary>
        /// <param name="json"></param>
        /// <returns></returns>
        public static bool IsJson(string json)
        {
            int errIndex;
            return IsJson(json, out errIndex);
        }
        public static bool IsJson(string json, out int errIndex)
        {
            errIndex = 0;
            if (IsJsonStart(ref json))
            {
                CharState cs = new CharState();
                char c;
                for (int i = 0; i < json.Length; i++)
                {
                    c = json[i];
                    if (SetCharState(c, ref cs) && cs.childrenStart)//设置关键符号状态。
                    {
                        string item = json.Substring(i);
                        int err;
                        int length = GetValueLength(item, true, out err);
                        cs.childrenStart = false;
                        if (err > 0)
                        {
                            errIndex = i + err;
                            return false;
                        }
                        i = i + length - 1;
                    }
                    if (cs.isError)
                    {
                        errIndex = i;
                        return false;
                    }
                }

                return !cs.arrayStart && !cs.jsonStart;
            }
            return false;
        }

        private static bool IsJsonStart(ref string json)
        {
            if (!string.IsNullOrEmpty(json))
            {
                json = json.Trim('\r', '\n', ' ');
                if (json.Length > 1)
                {
                    char s = json[0];
                    char e = json[json.Length - 1];
                    return (s == '{' && e == '}') || (s == '[' && e == ']');
                }
            }
            return false;
        }

        /// <summary>
        /// 获取值的长度（当Json值嵌套以"{"或"["开头时） qy 2024-7-15
        /// </summary>
        private static int GetValueLength(string json, bool breakOnErr, out int errIndex)
        {
            errIndex = 0;
            int len = 0;
            if (!string.IsNullOrEmpty(json))
            {
                CharState cs = new CharState();
                char c;
                for (int i = 0; i < json.Length; i++)
                {
                    c = json[i];
                    if (!SetCharState(c, ref cs))//设置关键符号状态。
                    {
                        if (!cs.jsonStart && !cs.arrayStart)//json结束，又不是数组，则退出。
                        {
                            break;
                        }
                    }
                    else if (cs.childrenStart)//正常字符，值状态下。
                    {
                        int length = GetValueLength(json.Substring(i), breakOnErr, out errIndex);//递归子值，返回一个长度。。。
                        cs.childrenStart = false;
                        cs.valueStart = 0;
                        //cs.state = 0;
                        i = i + length - 1;
                    }
                    if (breakOnErr && cs.isError)
                    {
                        errIndex = i;
                        return i;
                    }
                    if (!cs.jsonStart && !cs.arrayStart)//记录当前结束位置。
                    {
                        len = i + 1;//长度比索引+1
                        break;
                    }
                }
            }
            return len;
        }

        /// <summary>
        /// 字符状态 qy 2024-7-15
        /// </summary>
        private class CharState
        {
            internal bool jsonStart = false;//以 "{"开始了...
            internal bool setDicValue = false;// 可以设置字典值了。
            internal bool escapeChar = false;//以"\"转义符号开始了
            /// <summary>
            /// 数组开始【仅第一开头才算】，值嵌套的以【childrenStart】来标识。
            /// </summary>
            internal bool arrayStart = false;//以"[" 符号开始了
            internal bool childrenStart = false;//子级嵌套开始了。
            /// <summary>
            /// 【0 初始状态，或 遇到“,”逗号】；【1 遇到“：”冒号】
            /// </summary>
            internal int state = 0;

            /// <summary>
            /// 【-1 取值结束】【0 未开始】【1 无引号开始】【2 单引号开始】【3 双引号开始】
            /// </summary>
            internal int keyStart = 0;
            /// <summary>
            /// 【-1 取值结束】【0 未开始】【1 无引号开始】【2 单引号开始】【3 双引号开始】
            /// </summary>
            internal int valueStart = 0;
            internal bool isError = false;//是否语法错误。

            internal void CheckIsError(char c)//只当成一级处理（因为GetLength会递归到每一个子项处理）
            {
                if (keyStart > 1 || valueStart > 1)
                {
                    return;
                }
                //示例 ["aa",{"bbbb":123,"fff","ddd"}] 
                switch (c)
                {
                    case '{'://[{ "[{A}]":[{"[{B}]":3,"m":"C"}]}]
                        isError = jsonStart && state == 0;//重复开始错误 同时不是值处理。
                        break;
                    case '}':
                        isError = !jsonStart || (keyStart != 0 && state == 0);//重复结束错误 或者 提前结束{"aa"}。正常的有{}
                        break;
                    case '[':
                        isError = arrayStart && state == 0;//重复开始错误
                        break;
                    case ']':
                        isError = !arrayStart || jsonStart;//重复开始错误 或者 Json 未结束
                        break;
                    case '"':
                    case '\'':
                        isError = !(jsonStart || arrayStart); //json 或数组开始。
                        if (!isError)
                        {
                            //重复开始 [""",{"" "}]
                            isError = (state == 0 && keyStart == -1) || (state == 1 && valueStart == -1);
                        }
                        if (!isError && arrayStart && !jsonStart && c == '\'')//['aa',{}]
                        {
                            isError = true;
                        }
                        break;
                    case ':':
                        isError = !jsonStart || state == 1;//重复出现。
                        break;
                    case ',':
                        isError = !(jsonStart || arrayStart); //json 或数组开始。
                        if (!isError)
                        {
                            if (jsonStart)
                            {
                                isError = state == 0 || (state == 1 && valueStart > 1);//重复出现。
                            }
                            else if (arrayStart)//["aa,] [,]  [{},{}]
                            {
                                isError = keyStart == 0 && !setDicValue;
                            }
                        }
                        break;
                    case ' ':
                    case '\r':
                    case '\n'://[ "a",\r\n{} ]
                    case '\0':
                    case '\t':
                        break;
                    default: //值开头。。
                        isError = (!jsonStart && !arrayStart) || (state == 0 && keyStart == -1) || (valueStart == -1 && state == 1);//
                        break;
                }
                //if (isError)
                //{

                //}
            }
        }
        /// <summary>
        /// 设置字符状态(返回true则为关键词，返回false则当为普通字符处理） qy 2024-7-15
        /// </summary>
        private static bool SetCharState(char c, ref CharState cs)
        {
            cs.CheckIsError(c);
            switch (c)
            {
                case '{'://[{ "[{A}]":[{"[{B}]":3,"m":"C"}]}]
                    #region 大括号
                    if (cs.keyStart <= 0 && cs.valueStart <= 0)
                    {
                        cs.keyStart = 0;
                        cs.valueStart = 0;
                        if (cs.jsonStart && cs.state == 1)
                        {
                            cs.childrenStart = true;
                        }
                        else
                        {
                            cs.state = 0;
                        }
                        cs.jsonStart = true;//开始。
                        return true;
                    }
                    #endregion
                    break;
                case '}':
                    #region 大括号结束
                    if (cs.keyStart <= 0 && cs.valueStart < 2 && cs.jsonStart)
                    {
                        cs.jsonStart = false;//正常结束。
                        cs.state = 0;
                        cs.keyStart = 0;
                        cs.valueStart = 0;
                        cs.setDicValue = true;
                        return true;
                    }
                    // cs.isError = !cs.jsonStart && cs.state == 0;
                    #endregion
                    break;
                case '[':
                    #region 中括号开始
                    if (!cs.jsonStart)
                    {
                        cs.arrayStart = true;
                        return true;
                    }
                    else if (cs.jsonStart && cs.state == 1)
                    {
                        cs.childrenStart = true;
                        return true;
                    }
                    #endregion
                    break;
                case ']':
                    #region 中括号结束
                    if (cs.arrayStart && !cs.jsonStart && cs.keyStart <= 2 && cs.valueStart <= 0)//[{},333]//这样结束。
                    {
                        cs.keyStart = 0;
                        cs.valueStart = 0;
                        cs.arrayStart = false;
                        return true;
                    }
                    #endregion
                    break;
                case '"':
                case '\'':
                    #region 引号
                    if (cs.jsonStart || cs.arrayStart)
                    {
                        if (cs.state == 0)//key阶段,有可能是数组["aa",{}]
                        {
                            if (cs.keyStart <= 0)
                            {
                                cs.keyStart = (c == '"' ? 3 : 2);
                                return true;
                            }
                            else if ((cs.keyStart == 2 && c == '\'') || (cs.keyStart == 3 && c == '"'))
                            {
                                if (!cs.escapeChar)
                                {
                                    cs.keyStart = -1;
                                    return true;
                                }
                                else
                                {
                                    cs.escapeChar = false;
                                }
                            }
                        }
                        else if (cs.state == 1 && cs.jsonStart)//值阶段必须是Json开始了。
                        {
                            if (cs.valueStart <= 0)
                            {
                                cs.valueStart = (c == '"' ? 3 : 2);
                                return true;
                            }
                            else if ((cs.valueStart == 2 && c == '\'') || (cs.valueStart == 3 && c == '"'))
                            {
                                if (!cs.escapeChar)
                                {
                                    cs.valueStart = -1;
                                    return true;
                                }
                                else
                                {
                                    cs.escapeChar = false;
                                }
                            }

                        }
                    }
                    #endregion
                    break;
                case ':':
                    #region 冒号
                    if (cs.jsonStart && cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 0)
                    {
                        if (cs.keyStart == 1)
                        {
                            cs.keyStart = -1;
                        }
                        cs.state = 1;
                        return true;
                    }
                    // cs.isError = !cs.jsonStart || (cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 1);
                    #endregion
                    break;
                case ',':
                    #region 逗号 //["aa",{aa:12,}]

                    if (cs.jsonStart)
                    {
                        if (cs.keyStart < 2 && cs.valueStart < 2 && cs.state == 1)
                        {
                            cs.state = 0;
                            cs.keyStart = 0;
                            cs.valueStart = 0;
                            //if (cs.valueStart == 1)
                            //{
                            //    cs.valueStart = 0;
                            //}
                            cs.setDicValue = true;
                            return true;
                        }
                    }
                    else if (cs.arrayStart && cs.keyStart <= 2)
                    {
                        cs.keyStart = 0;
                        //if (cs.keyStart == 1)
                        //{
                        //    cs.keyStart = -1;
                        //}
                        return true;
                    }
                    #endregion
                    break;
                case ' ':
                case '\r':
                case '\n'://[ "a",\r\n{} ]
                case '\0':
                case '\t':
                    if (cs.keyStart <= 0 && cs.valueStart <= 0) //cs.jsonStart && 
                    {
                        return true;//跳过空格。
                    }
                    break;
                default: //值开头。。
                    if (c == '\\') //转义符号
                    {
                        if (cs.escapeChar)
                        {
                            cs.escapeChar = false;
                        }
                        else
                        {
                            cs.escapeChar = true;
                            return true;
                        }
                    }
                    else
                    {
                        cs.escapeChar = false;
                    }
                    if (cs.jsonStart || cs.arrayStart) // Json 或数组开始了。
                    {
                        if (cs.keyStart <= 0 && cs.state == 0)
                        {
                            cs.keyStart = 1;//无引号的
                        }
                        else if (cs.valueStart <= 0 && cs.state == 1 && cs.jsonStart)//只有Json开始才有值。
                        {
                            cs.valueStart = 1;//无引号的
                        }
                    }
                    break;
            }
            return false;
        }

        #endregion

        public static LinqExpressionType GetLinqCondition(this string stringType)
        {
            LinqExpressionType linqExpression;
            switch (stringType)
            {
                case HtmlElementType.Contains:
                    linqExpression = LinqExpressionType.In;
                    break;
                case HtmlElementType.ThanOrEqual:
                    linqExpression = LinqExpressionType.ThanOrEqual;
                    break;
                case HtmlElementType.LessOrequal:
                    linqExpression = LinqExpressionType.LessThanOrEqual;
                    break;
                case HtmlElementType.GT:
                    linqExpression = LinqExpressionType.GreaterThan;
                    break;
                case HtmlElementType.lt:
                    linqExpression = LinqExpressionType.LessThan;
                    break;
                case HtmlElementType.like:
                    linqExpression = LinqExpressionType.Contains;
                    break;
                default:
                    linqExpression = LinqExpressionType.Equal;
                    break;
            }
            return linqExpression;
        }
    }
}