// This file is @generated by prost-build.
/// A Timestamp represents a point in time independent of any time zone or local
/// calendar, encoded as a count of seconds and fractions of seconds at
/// nanosecond resolution. The count is relative to an epoch at UTC midnight on
/// January 1, 1970, in the proleptic Gregorian calendar which extends the
/// Gregorian calendar backwards to year one.
///
/// All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
/// second table is needed for interpretation, using a [24-hour linear
/// smear](<https://developers.google.com/time/smear>).
///
/// The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
/// restricting to that range, we ensure that we can convert to and from [RFC
/// 3339](<https://www.ietf.org/rfc/rfc3339.txt>) date strings.
///
/// # Examples
///
/// Example 1: Compute Timestamp from POSIX `time()`.
///
///      Timestamp timestamp;
///      timestamp.set_seconds(time(NULL));
///      timestamp.set_nanos(0);
///
/// Example 2: Compute Timestamp from POSIX `gettimeofday()`.
///
///      struct timeval tv;
///      gettimeofday(&tv, NULL);
///
///      Timestamp timestamp;
///      timestamp.set_seconds(tv.tv_sec);
///      timestamp.set_nanos(tv.tv_usec * 1000);
///
/// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
///
///      FILETIME ft;
///      GetSystemTimeAsFileTime(&ft);
///      UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
///
///      // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
///      // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
///      Timestamp timestamp;
///      timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
///      timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
///
/// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
///
///      long millis = System.currentTimeMillis();
///
///      Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
///          .setNanos((int) ((millis % 1000) * 1000000)).build();
///
///
/// Example 5: Compute Timestamp from Java `Instant.now()`.
///
///      Instant now = Instant.now();
///
///      Timestamp timestamp =
///          Timestamp.newBuilder().setSeconds(now.getEpochSecond())
///              .setNanos(now.getNano()).build();
///
///
/// Example 6: Compute Timestamp from current time in Python.
///
///      timestamp = Timestamp()
///      timestamp.GetCurrentTime()
///
/// # JSON Mapping
///
/// In JSON format, the Timestamp type is encoded as a string in the
/// [RFC 3339](<https://www.ietf.org/rfc/rfc3339.txt>) format. That is, the
/// format is "{year}-{month}-{day}T{hour}:{min}:{sec}\[.{frac_sec}\]Z"
/// where {year} is always expressed using four digits while {month}, {day},
/// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
/// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
/// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
/// is required. A proto3 JSON serializer should always use UTC (as indicated by
/// "Z") when printing the Timestamp type and a proto3 JSON parser should be
/// able to accept both UTC and other timezones (as indicated by an offset).
///
/// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
/// 01:30 UTC on January 15, 2017.
///
/// In JavaScript, one can convert a Date object to this format using the
/// standard
/// [toISOString()](<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString>)
/// method. In Python, a standard `datetime.datetime` object can be converted
/// to this format using
/// [`strftime`](<https://docs.python.org/2/library/time.html#time.strftime>) with
/// the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
/// the Joda Time's [`ISODateTimeFormat.dateTime()`](
/// <http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D>
/// ) to obtain a formatter capable of generating timestamps in this format.
///
///
#[derive(
    serde::Serialize, serde::Deserialize, Clone, Copy, PartialEq, Eq, Hash, ::prost::Message,
)]
pub struct Timestamp {
    /// Represents seconds of UTC time since Unix epoch
    /// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
    /// 9999-12-31T23:59:59Z inclusive.
    #[prost(int64, tag = "1")]
    pub seconds: i64,
    /// Non-negative fractions of a second at nanosecond resolution. Negative
    /// second values with fractions must still have non-negative nanos values
    /// that count forward in time. Must be from 0 to 999,999,999
    /// inclusive.
    #[prost(int32, tag = "2")]
    pub nanos: i32,
}
impl From<std::time::SystemTime> for Timestamp {
    fn from(system_time: std::time::SystemTime) -> Timestamp {
        let (seconds, nanos) = match system_time.duration_since(std::time::UNIX_EPOCH) {
            Ok(duration) => {
                let seconds = i64::try_from(duration.as_secs()).unwrap();
                (seconds, duration.subsec_nanos() as i32)
            }
            Err(error) => {
                let duration = error.duration();
                let seconds = i64::try_from(duration.as_secs()).unwrap();
                let nanos = duration.subsec_nanos() as i32;
                if nanos == 0 {
                    (-seconds, 0)
                } else {
                    (-seconds - 1, 1_000_000_000 - nanos)
                }
            }
        };
        Timestamp { seconds, nanos }
    }
}
