using System;
using System.Collections.Generic;
using System.Text;

namespace Kingo.DataAnalysis
{
    internal static class ExtendMethd
    {
        public static string ToTrim(this object value)
        {
            if (value == null || value == DBNull.Value)
                return string.Empty;
            return value.ToString().Trim();
        }
        public static int ToInt(this object value)
        {
            if (value == null)
                return 0;
            int result;
            int.TryParse(value.ToString(), out result);
            return result;
        }
        public static double ToDouble(this object value)
        {
            if (value == null)
                return 0;
            double result;
            double.TryParse(value.ToString(), out result);
            return result;
        }

        public static double ToDouble(this object value, int w)
        {
            if (value == null)
                return 0;
            double result;
            double.TryParse(value.ToString(), out result);
            if (result > 0)
            {
                result = Math.Round(result, w, MidpointRounding.AwayFromZero);
            }
            return result;
        }
        /// <summary>
        /// 实现数据的四舍五入法
        /// </summary>
        /// <param name="v">要进行处理的数据</param>
        /// <param name="x">保留的小数位数</param>
        /// <returns>四舍五入后的结果</returns> 
        private static double Round(double v, int x)
        {
            bool isNegative = false;
            //如果是负数
            if (v < 0)
            {
                isNegative = true;
                v = -v;
            }

            int IValue = 1;
            for (int i = 1; i <= x; i++)
            {
                IValue = IValue * 10;
            }
            double Int = Math.Round(v * IValue + 0.5, 0);
            v = Int / IValue;

            if (isNegative)
            {
                v = -v;
            }

            return v;
        }

        public static decimal ToDecimal(this object value)
        {
            if (value == null)
                return 0;
            decimal result;
            decimal.TryParse(value.ToString(), out result);
            return result;
        }

        public static decimal ToDecimal(this object value, int w)
        {
            if (value == null)
                return 0;
            decimal result;
            decimal.TryParse(value.ToString(), out result);
            if (result > 0)
            {
                result = Math.Round(result, w, MidpointRounding.AwayFromZero);
            }
            return result;
        }

        /// <summary>
        /// 判断 Object 是否不能转化成 DateTime 型数据(判断Object是否不能转化成 DateTime 型数据)
        /// </summary>
        /// <param name="sTheValue">判断对象</param>
        /// <returns></returns>
        public static bool JudgeIsCouldConversionDateTime(object sTheValue)
        {
            try
            {
                if (sTheValue == null)
                {
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(sTheValue.ToString()) == true)
                    {
                        return false;
                    }
                    else
                    {
                        DateTime dTemp = new DateTime();
                        if (DateTime.TryParse(sTheValue.ToString(), out dTemp) == false)
                        {
                            return false;
                        }
                        else
                        {
                            return true;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        /// <summary>
        /// 依据 obj获取 int
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static int GetIntByObject(object obj)
        {
            int iTemp = 0;
            try
            {
                iTemp = JudgeIsCouldConversionInt(obj) == true ? Convert.ToInt32(obj) : 0;
                return iTemp;
            }
            catch (Exception ex)
            {
                return 0;
            }
        }

        /// <summary>
        /// 判断 Object 是否不能转化成 int 型数据(判断Object是否不能转化成 int 型数据)
        /// </summary>
        /// <param name="sTheValue"></param>
        /// <returns></returns>
        public static bool JudgeIsCouldConversionInt(object sTheValue)
        {
            try
            {
                if (sTheValue == null)
                {
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(sTheValue.ToString()) == true)
                    {
                        return false;
                    }
                    else
                    {
                        int iTemp = 0;
                        if (int.TryParse(sTheValue.ToString(), out iTemp) == false)
                        {
                            return false;
                        }
                        else
                        {
                            return true;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }


        public static string GetStringByObject(object obj)
        {
            string sTemp = "";
            try
            {
                sTemp = JudgeIsCouldConversionStringOrHasValue(obj) == true ? obj.ToString() : "";
                return sTemp;
            }
            catch (Exception ex)
            {
                return "";
            }
        }

        /// <summary>
        /// 判断 Object 是否不能转化成 String 字符串(判断Object是否不能转化成String 字符串)
        /// </summary>
        /// <param name="sTheValue"></param>
        /// <returns></returns>
        public static bool JudgeIsCouldConversionStringOrHasValue(object sTheValue)
        {
            try
            {
                if (sTheValue == null)
                {
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(sTheValue.ToString()) == true)
                    {
                        return false;
                    }
                    else
                    {
                        return true;
                    }
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }


        /// <summary>
        /// 判断 Object 是否不能转化成 Double (判断Object是否不能转化成Double)
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool JudgeIsCouldConversionDouble(object obj)
        {
            try
            {
                if (obj == null)
                {
                    return false;
                }
                else
                {
                    if (string.IsNullOrWhiteSpace(obj.ToString()) == true)
                    {
                        return false;
                    }
                    else
                    {
                        double dTemp = 0;
                        if (double.TryParse(obj.ToString(), out dTemp) == false)
                        {
                            return false;
                        }
                        else
                        {
                            return true;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }
    }
}