use tz::datetime::{DateTime, UtcDateTime};
use tz::error::TzError;
use tz::timezone::{AlternateTime, LeapSecond, LocalTimeType, MonthWeekDay, RuleDay, TimeZoneRef, Transition, TransitionRule};

fn main() -> Result<(), TzError> {
    macro_rules! unwrap {
        ($x:expr) => {
            match $x {
                Ok(x) => x,
                Err(_) => panic!(),
            }
        };
    }

    const TIME_ZONE_REF: TimeZoneRef<'static> = unwrap!(TimeZoneRef::new(
        &[
            Transition::new(-2334101314, 1),
            Transition::new(-1157283000, 2),
            Transition::new(-1155436200, 1),
            Transition::new(-880198200, 3),
            Transition::new(-769395600, 4),
            Transition::new(-765376200, 1),
            Transition::new(-712150200, 5),
        ],
        const {
            &[
                unwrap!(LocalTimeType::new(-37886, false, Some(b"LMT"))),
                unwrap!(LocalTimeType::new(-37800, false, Some(b"HST"))),
                unwrap!(LocalTimeType::new(-34200, true, Some(b"HDT"))),
                unwrap!(LocalTimeType::new(-34200, true, Some(b"HWT"))),
                unwrap!(LocalTimeType::new(-34200, true, Some(b"HPT"))),
                unwrap!(LocalTimeType::new(-36000, false, Some(b"HST"))),
            ]
        },
        &[
            LeapSecond::new(78796800, 1),
            LeapSecond::new(94694401, 2),
            LeapSecond::new(126230402, 3),
            LeapSecond::new(157766403, 4),
            LeapSecond::new(189302404, 5),
            LeapSecond::new(220924805, 6),
        ],
        const {
            &Some(TransitionRule::Alternate(unwrap!(AlternateTime::new(
                unwrap!(LocalTimeType::new(-36000, false, Some(b"HST"))),
                unwrap!(LocalTimeType::new(-34200, true, Some(b"HPT"))),
                RuleDay::MonthWeekDay(unwrap!(MonthWeekDay::new(10, 5, 0))),
                93600,
                RuleDay::MonthWeekDay(unwrap!(MonthWeekDay::new(3, 4, 4))),
                7200,
            ))))
        },
    ));

    const LOCAL_TIME_TYPE: LocalTimeType = *unwrap!(TIME_ZONE_REF.find_local_time_type(0));

    const UTC: TimeZoneRef<'static> = TimeZoneRef::utc();

    const UNIX_EPOCH: UtcDateTime = unwrap!(UtcDateTime::from_timespec(0, 0));
    const UTC_DATE_TIME: UtcDateTime = unwrap!(UtcDateTime::new(2000, 1, 1, 0, 0, 0, 1000));

    const DATE_TIME: DateTime = unwrap!(DateTime::new(2000, 1, 1, 1, 0, 0, 1000, unwrap!(LocalTimeType::with_ut_offset(3600))));

    const DATE_TIME_1: DateTime = unwrap!(UTC_DATE_TIME.project(TIME_ZONE_REF));
    const DATE_TIME_2: DateTime = unwrap!(DATE_TIME_1.project(UTC));

    println!("{TIME_ZONE_REF:#?}");
    println!("{LOCAL_TIME_TYPE:?}");

    println!("{UNIX_EPOCH:?}");
    println!("{UTC_DATE_TIME:?}");

    println!("{DATE_TIME:#?}");

    println!("{DATE_TIME_1:#?}");
    println!("{DATE_TIME_2:#?}");

    Ok(())
}