using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Data;
using System.Text;

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：2019.09.09
	/// 描 述：扩展.json序列反序列化
	/// </summary>
	public static class ExtensionsJson
	{
		/// <summary>
		/// 转成json对象
		/// </summary>
		/// <param name="Json">json字串</param>
		/// <returns></returns>
		public static object ToJson(this string Json)
		{
			return Json == null ? null : JsonConvert.DeserializeObject(Json);
		}

		/// <summary>
		/// 转成json字串
		/// </summary>
		/// <param name="obj">对象</param>
		/// <returns></returns>
		public static string ToJson(this object obj)
		{
			var timeConverter = new IsoDateTimeConverter { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" };
			return JsonConvert.SerializeObject(obj, timeConverter);
		}

		/// <summary>
		/// 转成json字串
		/// </summary>
		/// <param name="obj">对象</param>
		/// <param name="datetimeformats">时间格式化</param>
		/// <returns></returns>
		public static string ToJson(this object obj, string datetimeformats)
		{
			var timeConverter = new IsoDateTimeConverter { DateTimeFormat = datetimeformats };
			return JsonConvert.SerializeObject(obj, timeConverter);
		}

		/// <summary>
		/// 字串反序列化成指定对象实体
		/// </summary>
		/// <typeparam name="T">实体类型</typeparam>
		/// <param name="Json">字串</param>
		/// <returns></returns>
		public static T ToObject<T>(this string Json)
		{
			return Json == null ? default(T) : JsonConvert.DeserializeObject<T>(Json);
		}

		/// <summary>
		/// 字串反序列化成指定对象实体(列表)
		/// </summary>
		/// <typeparam name="T">实体类型</typeparam>
		/// <param name="Json">字串</param>
		/// <returns></returns>
		public static List<T> ToList<T>(this string Json)
		{
			return Json == null ? null : JsonConvert.DeserializeObject<List<T>>(Json);
		}

		/// <summary>
		/// 字串反序列化成DataTable
		/// </summary>
		/// <param name="Json">字串</param>
		/// <returns></returns>
		public static DataTable ToTable(this string Json)
		{
			return Json == null ? null : JsonConvert.DeserializeObject<DataTable>(Json);
		}

		/// <summary>
		/// 字串反序列化成linq对象
		/// </summary>
		/// <param name="Json">字串</param>
		/// <returns></returns>
		public static JObject ToJObject(this string Json)
		{
			return Json == null ? JObject.Parse("{}") : JObject.Parse(Json.Replace("&nbsp;", ""));
		}
	}

	/// <summary>
	/// 检测扩展
	/// </summary>
	public static class ExtensionsValid
	{
		/// <summary>
		/// 检测空值,为null则抛出ArgumentNullException异常
		/// </summary>
		/// <param name="obj">对象</param>
		/// <param name="parameterName">参数名</param>
		public static void CheckNull(this object obj, string parameterName)
		{
			if (obj == null)
				throw new ArgumentNullException(parameterName);
		}

		/// <summary>
		/// 是否为空
		/// </summary>
		/// <param name="value">值</param>
		public static bool IsEmpty(this string value)
		{
			return string.IsNullOrWhiteSpace(value);
		}

		/// <summary>
		/// 是否为空
		/// </summary>
		/// <param name="value">值</param>
		public static bool IsEmpty(this Guid? value)
		{
			if (value == null)
				return true;
			return IsEmpty(value.Value);
		}

		/// <summary>
		/// 是否为空
		/// </summary>
		/// <param name="value">值</param>
		public static bool IsEmpty(this Guid value)
		{
			if (value == Guid.Empty)
				return true;
			return false;
		}

		/// <summary>
		/// 是否为空
		/// </summary>
		/// <param name="value">值</param>
		public static bool IsEmpty(this object value)
		{
			if (value != null && !string.IsNullOrEmpty(value.ToString()))
			{
				return false;
			}
			else
			{
				return true;
			}
		}

		/// <summary>
		/// 安全返回值
		/// </summary>
		/// <param name="value">可空值</param>
		public static T SafeValue<T>(this T? value) where T : struct
		{
			return value ?? default(T);
		}

		/// <summary>
		/// 是否包含
		/// </summary>
		/// <param name="obj">字串</param>
		/// <param name="value">包含字串</param>
		/// <returns></returns>
		public static bool ContainsEx(this string obj, string value)
		{
			if (string.IsNullOrEmpty(obj))
			{
				return false;
			}
			else
			{
				return obj.Contains(value);
			}
		}

		/// <summary>
		/// 字串是否在指定字串中存在
		/// </summary>
		/// <param name="obj">字串</param>
		/// <param name="value">被包含字串</param>
		/// <returns></returns>
		public static bool Like(this string obj, string value)
		{
			if (string.IsNullOrEmpty(value))
			{
				return false;
			}
			else if (string.IsNullOrEmpty(obj))
			{
				return false;
			}
			else
			{
				if (value.IndexOf(obj) != -1)
				{
					return true;
				}
				else
				{
					return false;
				}
			}
		}

		/// <summary>
		/// 数据字段类型转化
		/// </summary>
		/// <param name="str">字串</param>
		/// <returns></returns>
		public static DbType ToDbType(this string str)
		{
			DbType res = DbType.String;
			switch (str)
			{
				case "int?":
					res = DbType.Int32;
					break;

				case "byte?":
					res = DbType.Byte;
					break;

				case "float?":
					res = DbType.Single;
					break;

				case "decimal?":
					res = DbType.Decimal;
					break;

				case "string":
					res = DbType.String;
					break;

				case "bool?":
					res = DbType.Boolean;
					break;

				case "DateTime?":
					res = DbType.DateTime;
					break;
			}

			return res;
		}
	}

	/// <summary>
	/// 字串扩展
	/// </summary>
	public static class ExtensionsStr
	{
		/// <summary>
		/// 获取格式化字符串，带时分秒，格式："yyyy-MM-dd HH:mm:ss"
		/// </summary>
		/// <param name="dateTime">日期</param>
		/// <param name="isRemoveSecond">是否移除秒</param>
		public static string ToDateTimeString(this DateTime dateTime, bool isRemoveSecond = false)
		{
			if (isRemoveSecond)
				return dateTime.ToString("yyyy-MM-dd HH:mm");
			return dateTime.ToString("yyyy-MM-dd HH:mm:ss");
		}

		/// <summary>
		/// 获取格式化字符串，带时分秒，格式："yyyy-MM-dd HH:mm:ss"
		/// </summary>
		/// <param name="dateTime">日期</param>
		/// <param name="isRemoveSecond">是否移除秒</param>
		public static string ToDateTimeString(this DateTime? dateTime, bool isRemoveSecond = false)
		{
			if (dateTime == null)
				return string.Empty;
			return ToDateTimeString(dateTime.Value, isRemoveSecond);
		}

		/// <summary>
		/// 获取格式化字符串，不带时分秒，格式："yyyy-MM-dd"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToDateString(this DateTime dateTime)
		{
			return dateTime.ToString("yyyy-MM-dd");
		}

		/// <summary>
		/// 获取格式化字符串，不带时分秒，格式："yyyy-MM-dd"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToDateString(this DateTime? dateTime)
		{
			if (dateTime == null)
				return string.Empty;
			return ToDateString(dateTime.Value);
		}

		/// <summary>
		/// 获取格式化字符串，不带年月日，格式："HH:mm:ss"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToTimeString(this DateTime dateTime)
		{
			return dateTime.ToString("HH:mm:ss");
		}

		/// <summary>
		/// 获取格式化字符串，不带年月日，格式："HH:mm:ss"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToTimeString(this DateTime? dateTime)
		{
			if (dateTime == null)
				return string.Empty;
			return ToTimeString(dateTime.Value);
		}

		/// <summary>
		/// 获取格式化字符串，带毫秒，格式："yyyy-MM-dd HH:mm:ss.fff"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToMillisecondString(this DateTime dateTime)
		{
			return dateTime.ToString("yyyy-MM-dd HH:mm:ss.fff");
		}

		/// <summary>
		/// 获取格式化字符串，带毫秒，格式："yyyy-MM-dd HH:mm:ss.fff"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToMillisecondString(this DateTime? dateTime)
		{
			if (dateTime == null)
				return string.Empty;
			return ToMillisecondString(dateTime.Value);
		}

		/// <summary>
		/// 获取格式化字符串，不带时分秒，格式："yyyy年MM月dd日"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToChineseDateString(this DateTime dateTime)
		{
			return string.Format("{0}年{1}月{2}日", dateTime.Year, dateTime.Month, dateTime.Day);
		}

		/// <summary>
		/// 获取格式化字符串，不带时分秒，格式："yyyy年MM月dd日"
		/// </summary>
		/// <param name="dateTime">日期</param>
		public static string ToChineseDateString(this DateTime? dateTime)
		{
			if (dateTime == null)
				return string.Empty;
			return ToChineseDateString(dateTime.SafeValue());
		}

		/// <summary>
		/// 获取格式化字符串，带时分秒，格式："yyyy年MM月dd日 HH时mm分"
		/// </summary>
		/// <param name="dateTime">日期</param>
		/// <param name="isRemoveSecond">是否移除秒</param>
		public static string ToChineseDateTimeString(this DateTime dateTime, bool isRemoveSecond = false)
		{
			StringBuilder result = new StringBuilder();
			result.AppendFormat("{0}年{1}月{2}日", dateTime.Year, dateTime.Month, dateTime.Day);
			result.AppendFormat(" {0}时{1}分", dateTime.Hour, dateTime.Minute);
			if (isRemoveSecond == false)
				result.AppendFormat("{0}秒", dateTime.Second);
			return result.ToString();
		}

		/// <summary>
		/// 获取格式化字符串，带时分秒，格式："yyyy年MM月dd日 HH时mm分"
		/// </summary>
		/// <param name="dateTime">日期</param>
		/// <param name="isRemoveSecond">是否移除秒</param>
		public static string ToChineseDateTimeString(this DateTime? dateTime, bool isRemoveSecond = false)
		{
			if (dateTime == null)
				return string.Empty;
			return ToChineseDateTimeString(dateTime.Value);
		}
	}

	/// <summary>
	/// 转化扩展
	/// </summary>
	public static class ExtensionsConvert
	{
		#region 数值转换

		/// <summary>
		/// 转换为整型
		/// </summary>
		/// <param name="data">数据</param>
		public static int ToInt(this object data)
		{
			if (data == null)
				return 0;
			int result;
			var success = int.TryParse(data.ToString(), out result);
			if (success)
				return result;
			try
			{
				return Convert.ToInt32(ToDouble(data, 0));
			}
			catch (Exception)
			{
				return 0;
			}
		}

		/// <summary>
		/// 转换为可空整型
		/// </summary>
		/// <param name="data">数据</param>
		public static int? ToIntOrNull(this object data)
		{
			if (data == null)
				return null;
			int result;
			bool isValid = int.TryParse(data.ToString(), out result);
			if (isValid)
				return result;
			return null;
		}

		/// <summary>
		/// 转换为双精度浮点数
		/// </summary>
		/// <param name="data">数据</param>
		public static double ToDouble(this object data)
		{
			if (data == null)
				return 0;
			double result;
			return double.TryParse(data.ToString(), out result) ? result : 0;
		}

		/// <summary>
		/// 转换为双精度浮点数,并按指定的小数位4舍5入
		/// </summary>
		/// <param name="data">数据</param>
		/// <param name="digits">小数位数</param>
		public static double ToDouble(this object data, int digits)
		{
			return Math.Round(ToDouble(data), digits);
		}

		/// <summary>
		/// 转换为可空双精度浮点数
		/// </summary>
		/// <param name="data">数据</param>
		public static double? ToDoubleOrNull(this object data)
		{
			if (data == null)
				return null;
			double result;
			bool isValid = double.TryParse(data.ToString(), out result);
			if (isValid)
				return result;
			return null;
		}

		/// <summary>
		/// 转换为高精度浮点数
		/// </summary>
		/// <param name="data">数据</param>
		public static decimal ToDecimal(this object data)
		{
			if (data == null)
				return 0;
			decimal result;
			return decimal.TryParse(data.ToString(), out result) ? result : 0;
		}

		/// <summary>
		/// 转换为高精度浮点数,并按指定的小数位4舍5入
		/// </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(ToDecimal(data), digits);
		}

		/// <summary>
		/// 转换为可空高精度浮点数
		/// </summary>
		/// <param name="data">数据</param>
		public static decimal? ToDecimalOrNull(this object data)
		{
			if (data == null)
				return null;
			decimal result;
			bool isValid = decimal.TryParse(data.ToString(), out result);
			if (isValid)
				return result;
			return null;
		}

		/// <summary>
		/// 转换为可空高精度浮点数,并按指定的小数位4舍5入
		/// </summary>
		/// <param name="data">数据</param>
		/// <param name="digits">小数位数</param>
		public static decimal? ToDecimalOrNull(this object data, int digits)
		{
			var result = ToDecimalOrNull(data);
			if (result == null)
				return null;
			return Math.Round(result.Value, digits);
		}

		#endregion 数值转换

		#region 日期转换

		/// <summary>
		/// 转换为日期
		/// </summary>
		/// <param name="data">数据</param>
		public static DateTime ToDate(this object data)
		{
			if (data == null)
				return DateTime.MinValue;
			DateTime result;
			return DateTime.TryParse(data.ToString(), out result) ? result : DateTime.MinValue;
		}

		/// <summary>
		/// 转换为可空日期
		/// </summary>
		/// <param name="data">数据</param>
		public static DateTime? ToDateOrNull(this object data)
		{
			if (data == null)
				return null;
			DateTime result;
			bool isValid = DateTime.TryParse(data.ToString(), out result);
			if (isValid)
				return result;
			return null;
		}

		#endregion 日期转换

		#region 布尔转换

		/// <summary>
		/// 转换为布尔值
		/// </summary>
		/// <param name="data">数据</param>
		public static bool ToBool(this object data)
		{
			if (data == null)
				return false;
			bool? value = GetBool(data);
			if (value != null)
				return value.Value;
			bool result;
			return bool.TryParse(data.ToString(), out result) && result;
		}

		/// <summary>
		/// 获取布尔值
		/// </summary>
		/// <param name="data">数据</param>
		/// <returns></returns>
		private static bool? GetBool(this object data)
		{
			switch (data.ToString().Trim().ToLower())
			{
				case "0":
					return false;

				case "1":
					return true;

				case "是":
					return true;

				case "否":
					return false;

				case "yes":
					return true;

				case "no":
					return false;

				default:
					return null;
			}
		}

		/// <summary>
		/// 转换为可空布尔值
		/// </summary>
		/// <param name="data">数据</param>
		public static bool? ToBoolOrNull(this object data)
		{
			if (data == null)
				return null;
			bool? value = GetBool(data);
			if (value != null)
				return value.Value;
			bool result;
			bool isValid = bool.TryParse(data.ToString(), out result);
			if (isValid)
				return result;
			return null;
		}

		#endregion 布尔转换

		#region 字符串转换

		/// <summary>
		/// 转换为字符串
		/// </summary>
		/// <param name="data">数据</param>
		public static string ToString(this object data)
		{
			return data == null ? string.Empty : data.ToString().Trim();
		}

		#endregion 字符串转换
	}
}