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

namespace Container.Common
{
    /// <summary>
    /// 公共类库
    /// </summary>
    public class CommonLib
    {

        /// <summary>
        /// 日期转换为时间戳（时间戳单位秒）
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static long ConvertToTimeStamp(DateTime time)
        {
            DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            return (long)(time.AddHours(-8) - Jan1st1970).TotalSeconds;
        }
        /// <summary>
        /// 获取当前时间戳
        /// </summary>
        /// <returns></returns>
        public static long CurrentTime()
        {
            DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            return (long)(DateTime.Now.AddHours(-8) - Jan1st1970).TotalSeconds;
        }
        /// <summary>
        /// 时间戳转换为日期（时间戳/单位秒）
        /// </summary>
        /// <param name="timeStamp"></param>
        /// <returns></returns>
        public static DateTime ConvertToDateTime(long timeStamp)
        {
            var start = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            return start.AddMilliseconds(timeStamp).AddHours(8);
        }
        /// <summary>
        /// 生成随机数字
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        public static string Number(int Length, bool Sleep)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            string result = "";
            System.Random random = new Random();
            for (int i = 0; i < Length; i++)
            {
                result += random.Next(10).ToString();
            }
            return result;
        }

        /// <summary>
        /// 解密(反转再base64解码)，常规配置，例如密码
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string StringDecode(string str)
        {
            string result = string.Empty;
            try
            {
                if (!string.IsNullOrEmpty(str))
                {
                    char[] arr = str.ToCharArray();
                    Array.Reverse(arr);
                    result = Encoding.UTF8.GetString(Convert.FromBase64String(new string(arr)));
                }
            }
            catch (Exception ex)
            {

            }
            return result;
        }

    }
}