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

namespace KJD_Web.Utils
{
    public class TimeUtils
    {
        /// <summary>
        ///  时间戳转为C#格式时间
        /// </summary>
        /// <param name="timeStamp"></param>
        /// <returns></returns>
        public static DateTime StampToDateTime(int timeStamp)
        {
            DateTime dateTimeStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dateTimeStart.Add(toNow);
        }

        /// <summary>
        ///  时间戳转为C#格式时间
        /// </summary>
        /// <param name="timeStamp"></param>
        /// <returns></returns>
        public static DateTime StampMillisecondsToDateTime(long timeStamp)
        {
            DateTime dateTimeStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dateTimeStart.Add(toNow);
        }

        /// <summary>
        /// C#格式时间转换为Unix时间戳(秒)
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static int DateTimeToTimestampSeconds(DateTime time)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            return (int)(time - startTime).TotalSeconds;
        }

        /// <summary>
        /// C#格式时间转换为Unix时间戳(毫秒)
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static long DateTimeToTimestampMilliseconds(DateTime time)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            return (long)(time - startTime).TotalMilliseconds;
        }
    }
}