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

namespace KJD_Web.Utils
{
    public class RandomUtils
    {
        public static string WordBase = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz";
        public static string NumberBase = "0123456789";
        public static string WordNumberBase = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz01234567890123456789";
        public static string SignWordBase = ".`~^*_| -#$%&?+";//".`~^*_| -#$%&?";

        public static int GetId(int max)
        {
            return new Random(Guid.NewGuid().GetHashCode()).Next(0, max);
        }

        public static int GetId(int min, int max)
        {
            return new Random(Guid.NewGuid().GetHashCode()).Next(min, max);
        }

        public static string GetWord(int len)
        {
            StringBuilder s = new StringBuilder();
            for (int i = 0; i < len; i++)
            {
                s.Append(WordBase[new Random(Guid.NewGuid().GetHashCode()).Next(WordBase.Length)]);
            }
            return s.ToString();
        }
        public static string GetNumber(int len)
        {
            StringBuilder s = new StringBuilder();
            for (int i = 0; i < len; i++)
            {
                s.Append(NumberBase[new Random(Guid.NewGuid().GetHashCode()).Next(NumberBase.Length)]);
            }
            return s.ToString();
        }
        public static string GetWordNumber(int len)
        {
            StringBuilder s = new StringBuilder();
            for (int i = 0; i < len; i++)
            {
                s.Append(WordNumberBase[new Random(Guid.NewGuid().GetHashCode()).Next(WordNumberBase.Length)]);
            }
            return s.ToString();
        }
        /// <summary>
        /// 获取新的属性名称
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public static string GetNewProp(bool begin, string name)
        {
            char w = SignWordBase[new Random(Guid.NewGuid().GetHashCode()).Next(SignWordBase.Length)];
            char add = SignWordBase[new Random(Guid.NewGuid().GetHashCode()).Next(SignWordBase.Length)];
            if (begin)
                name += "" + w + add;
            else
                name = "" + add + w + "" + name;
            return name;
        }
    }
}