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

namespace GetHttpData.SDK
{
    /// <summary>
    /// 获取随机执行时间间隔
    /// </summary>
    public class RandomNum
    {
        private static char[] constant =
            {
                '0','1','2','3','4','5','6','7','8','9',
                'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
                'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
              };
        public static string GenerateRandomNumber(int Length)
        {
            StringBuilder newRandom = new StringBuilder(62);
            Random rd = new Random(Guid.NewGuid().GetHashCode());
            for (int i = 0; i < Length; i++)
            {
                newRandom.Append(constant[rd.Next(62)]);
            }
            return newRandom.ToString();
        }
        public static int[] getRandomNum(int num, int minValue, int maxValue)
        {
            Random ra = new Random(Guid.NewGuid().GetHashCode());
            int[] arrNum = new int[num];
            int tmp = 0;
            for (int i = 0; i <= num - 1; i++)
            {
                tmp = ra.Next(minValue, maxValue); //随机取数
                arrNum[i] = getNum(arrNum, tmp, minValue, maxValue, ra); //取出值赋到数组中
            }
            return arrNum;
        }
        public static int getNum(int[] arrNum, int tmp, int minValue, int maxValue, Random ra)
        {
            int n = 0;
            while (n <= arrNum.Length - 1)
            {
                if (arrNum[n] == tmp) //利用循环判断是否有重复
                {
                    tmp = ra.Next(minValue, maxValue); //重新随机获取。
                    getNum(arrNum, tmp, minValue, maxValue, ra);//递归:如果取出来的数字和已取得的数字有重复就重新随机获取。
                }
                n++;
            }
            return tmp;
        }
        public static string Str_char(int Length, bool Sleep)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            char[] Pattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
            string result = "";
            int n = Pattern.Length;
            System.Random random = new Random(Guid.NewGuid().GetHashCode());
            for (int i = 0; i < Length; i++)
            {
                int rnd = random.Next(0, n);
                result += Pattern[rnd];
            }
            return result;
        }

    }
}