use serde::Serialize;
use std::time::{SystemTime, UNIX_EPOCH};

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize)]
pub struct Timestamp(i64);

impl Timestamp {
    pub fn now() -> Self {
        let nanos = SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .expect("system clock is before the Unix epoch")
            .as_nanos() as i64;
        Timestamp(nanos)
    }

    #[allow(dead_code)]
    pub fn from_millis(millis: i64) -> Self {
        Timestamp(millis * 1_000_000)
    }

    pub fn as_millis(&self) -> i64 {
        self.0 / 1_000_000
    }
}