namespace WPFluent.Extensions;

/// <summary>
/// A collection of several extensions to the <see cref="DateTime"/> class.
/// </summary>
public static class DateTimeExtensions
{
    /// <summary>
    /// Gets the number of microseconds that have elapsed since the Unix epoch, excluding leap seconds. The Unix epoch
    /// is 00:00:00 UTC on 1 January 1970.
    /// </summary>
    public static long GetMicroTimestamp(this DateTime dateTime)
    {
        // Should be 10^-6
        return dateTime.Subtract(new DateTime(1970, 1, 1)).Ticks / (TimeSpan.TicksPerMillisecond / 1000);
    }

    /// <summary>
    /// Gets the number of milliseconds that have elapsed since the Unix epoch, excluding leap seconds. The Unix epoch
    /// is 00:00:00 UTC on 1 January 1970.
    /// </summary>
    public static long GetMillisTimestamp(this DateTime dateTime)
    {
        // Should be 10^-3
        return (long)dateTime.Subtract(new DateTime(1970, 1, 1)).TotalMilliseconds;
    }

    /// <summary>
    /// Gets the number of seconds that have elapsed since the Unix epoch, excluding leap seconds. The Unix epoch is
    /// 00:00:00 UTC on 1 January 1970.
    /// </summary>
    public static long GetTimestamp(this DateTime dateTime)
    { return (long)dateTime.Subtract(new DateTime(1970, 1, 1)).TotalSeconds; }
}