using System;

namespace WX.CRM.WebHelper
{
    public static class ParamExtension
    {
        public static string GetString(this string data)
        {
            if (!string.IsNullOrEmpty(data) && !string.IsNullOrWhiteSpace(data))
            {
                return data.Trim();
            }
            else
            {
                return "";
            }
        }


        /// <summary>
        /// 自定义decimal
        /// </summary>
        /// <param name="data"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static decimal GetDecimal(this string data, decimal value)
        {
            decimal result;
            if (decimal.TryParse(data, out result))
            {
                return result;
            }
            else
            {
                return value;
            }
        }
        /// <summary>
        /// 自定义decimal
        /// </summary>
        /// <param name="data"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static decimal? GetNullDecimal(this string data, decimal value)
        {
            if (string.IsNullOrEmpty(data) || string.IsNullOrWhiteSpace(data))
                return null;
            decimal result;
            if (decimal.TryParse(data, out result))
            {
                return result;
            }
            else
            {
                return value;
            }
        }
        /// <summary>
        /// 返回null Decimal
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static decimal? GetDecimal(this string data)
        {
            decimal result;
            if (decimal.TryParse(data, out result))
            {
                return result;
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 返回null Int
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static int? GetInt(this string data)
        {
            int result;
            if (int.TryParse(data, out result))
            {
                return result;
            }
            else
            {
                return null;
            }
        }
        /// <summary>
        /// 返回 Int
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static int GetInt(this string data, int value)
        {
            int result;
            if (int.TryParse(data, out result))
            {
                return result;
            }
            else
            {
                return value;
            }
        }
        /// <summary>
        /// 返回时间null
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static DateTime? GetDateTime(this string data)
        {
            DateTime dt;
            if (!string.IsNullOrWhiteSpace(data) && DateTime.TryParse(data, out dt))
                return dt;
            else return null;
        }
        /// <summary>
        /// 返回时间Null（数据库）
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static object GetObjectByDateTime(this string data)
        {
            DateTime dt;
            if (!string.IsNullOrWhiteSpace(data) && DateTime.TryParse(data, out dt))
                return dt;
            else return DBNull.Value;
        }
        /// <summary>
        /// 当前时间
        /// </summary>
        /// <param name="data"></param>
        /// <param name="day">添加/减少天数</param>
        /// <returns></returns>
        public static DateTime GetDateTime(this string data, int day)
        {
            DateTime dt;
            if (!string.IsNullOrWhiteSpace(data) && DateTime.TryParse(data, out dt))
                return dt;
            else return DateTime.Now.AddDays(day);
        }
        /// <summary>
        /// 当月第一天/当前时间
        /// </summary>
        /// <param name="data"></param>
        /// <param name="firstday">true 返回当月第一天，false 返回当前时间</param>
        /// <returns></returns>
        public static DateTime GetDateTime(this string data, bool firstday)
        {
            DateTime dt;
            if (!string.IsNullOrWhiteSpace(data) && DateTime.TryParse(data, out dt))
                return dt;
            else
            {
                if (firstday)
                {
                    return new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
                }
                else
                {
                    return DateTime.Now;
                }
            }
        }
        /// <summary>
        /// 返回时间null或Add  Day
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static DateTime? GetDateTimeAdd(this string data, int day = 0)
        {
            DateTime dt;
            if (!string.IsNullOrWhiteSpace(data) && DateTime.TryParse(data, out dt))
            {
                if (day > 0)
                    return dt.AddDays(day);
                return dt;
            }
            else return null;
        }

        public static decimal GetNullDecimal(this decimal? data, double value)
        {
            if (data.HasValue)
                return data.Value;
            else
                return Convert.ToDecimal(value);
        }
    }
}