using System;

namespace Maki
{
    internal static class Utility
    {
        public static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        public static readonly DateTime DiscordEpoch = new DateTime(2015, 1, 1, 0, 0, 0, DateTimeKind.Utc);

        public static DateTime FromUnixTimeMilliseconds(long ms) => UnixEpoch.AddMilliseconds(ms);

        public static DateTime FromDiscordTimeMilliseconds(long ms) => DiscordEpoch.AddMilliseconds(ms);

        public static DateTime FromDiscordSnowflake(ulong snowflake) => FromDiscordTimeMilliseconds((long)snowflake >> 22);
    }
}