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

namespace JwKdsV.Core.Utils
{
    public class DecimalUtils
    {

        public static int GetInt(object obj)
        {
            return GetInt(obj, 0);
        }

        public static int GetInt(object obj, int defaultValue)
        {
            int _value = defaultValue;
            int.TryParse((obj != null ? obj.ToString() : defaultValue.ToString()), out _value);
            return _value;
        }

        public static double GetDouble(object obj)
        {
            return GetDouble(obj, 0);
        }

        public static double GetDouble(object obj, double defaultValue)
        {
            double _value = defaultValue;
            double.TryParse((obj != null ? obj.ToString() : defaultValue.ToString()), out _value);
            return _value;
        }

        public static decimal GetDecimal(object obj)
        {
            return GetDecimal(obj, 0);
        }

        public static decimal GetDecimal(object obj, decimal defaultValue)
        {
            decimal _value = defaultValue;
            decimal.TryParse((obj != null ? obj.ToString() : defaultValue.ToString()), out _value);
            return _value;
        }

        /// <summary>
        /// 保留两位小数，四舍五入
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static decimal Random(decimal value)
        {
            return Math.Round(value, Constant.POINTNUM, MidpointRounding.AwayFromZero);
        }

        /// <summary>
        /// 指定保存小数位数，四舍五入
        /// </summary>
        /// <param name="value"></param>
        /// <param name="pointNum"></param>
        /// <returns></returns>
        public static decimal Random(decimal value, int pointNum)
        {
            return Math.Round(value, pointNum, MidpointRounding.AwayFromZero);
        }

        /// <summary>
        /// 指定位数的数字格式化，size支持0、1、2
        /// </summary>
        /// <param name="size"></param>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string FormatDataSwitch(decimal num, int size)
        {
            string result = "";
            switch (size)
            {
                case 0:
                    result = FormatDataNoPoint(num);
                    break;
                case 1:
                    result = FormatDataOnePoint(num);
                    break;
                case 2:
                    result = FormatDataDoublePoint(num);
                    break;
            }
            return result;
        }

        /// <summary>
        /// 格式化为无小数
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string FormatDataNoPoint(decimal num)
        {
            return FormatData(num, "0.##");
        }

        /// <summary>
        /// 格式化为1位小数
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string FormatDataOnePoint(decimal num)
        {
            return FormatData(num, "0.0#");
        }

        /// <summary>
        /// 格式化为2位小数
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string FormatDataDoublePoint(decimal num)
        {
            return FormatData(num, "f2");
        }

        /// <summary>
        /// 指定格式的数字格式化
        /// </summary>
        /// <param name="num"></param>
        /// <param name="format"></param>
        /// <returns></returns>
        public static string FormatData(decimal num, string format)
        {
            return num.ToString(format);
        }

        /// <summary>
        /// 金额分转元
        /// </summary>
        /// <param name="amount"></param>
        /// <returns></returns>
        public static decimal Fen2Yuan(object amount)
        {
            return Fen2Yuan(GetDecimal(amount));
        }

        /// <summary>
        /// 金额分转元
        /// </summary>
        /// <param name="amount"></param>
        /// <returns></returns>
        public static decimal Fen2Yuan(decimal amount)
        {
            return amount / 100;
        }
    }
}