use lazy_static::lazy_static;
use std::time::Duration;
use time::{OffsetDateTime, UtcOffset};

pub const ONE_SECOND: Duration = Duration::from_secs(1);
pub const ONE_MINUTE: Duration = Duration::from_secs(60);
pub const FIFTEEN_MINUTES: Duration = Duration::from_secs(60 * 15);

lazy_static! {
    pub static ref MAX_TIMESTAMP: OffsetDateTime =
        OffsetDateTime::from_unix_timestamp(253_402_300_799).unwrap();
    pub static ref EST_OFFSET: UtcOffset = UtcOffset::from_hms(-5, 0, 0).unwrap();
}

pub fn last_minute() -> OffsetDateTime {
    let now_timestamp = OffsetDateTime::now_utc().unix_timestamp();
    OffsetDateTime::from_unix_timestamp(now_timestamp - now_timestamp % 60).unwrap()
}

pub fn duration_until(time: OffsetDateTime) -> Duration {
    let duration = time - OffsetDateTime::now_utc();

    if duration.is_positive() {
        duration.unsigned_abs()
    } else {
        Duration::default()
    }
}