import System.*
import System.Console.*

class FixedClock : Clock {
    val Now: Instant {
        get => Instant.FromUnixTimeTicks(ticks: -1L)
    }
}

func Read(clock: Clock) -> Instant {
    return clock.Now
}

func ShowCurrentTime() {
    let clock: Clock = SystemClock()
    let instant = clock.Now
    let local = instant.ToLocalDateTime()
    WriteLine(local.Date.Year)
    WriteLine(local.Time.Hour)
}

func Main() {
    let fixedClock: Clock = FixedClock()
    let instant = Read(fixedClock)
    WriteLine(instant.UnixTimeTicks.CompareTo(-1L))
    WriteLine(instant.CompareTo(Instant.FromUnixTimeTicks(ticks: 0L)))
    let duration = Duration.FromTicks(ticks: -10L)
    WriteLine(duration.Ticks.CompareTo(-10L))
    WriteLine(duration.CompareTo(Duration.FromTicks(ticks: 0L)))
    if duration.Equals(other: Duration.FromTicks(ticks: -10L)) {
        WriteLine("Same duration")
    }
    let clock: Clock = SystemClock()
    let now = Read(clock)
    let local = now.ToLocalDateTime()
    if local.Date.Year >= 2026 {
        WriteLine("System clock")
    }
}